A little background, I am working on a client server application using MVVM.

I have a common assembly that contains the models.

In my client solution I have a WPF Controls library that defines a data templates for the models in the common assembly.

The client application references the WPF controls library. When I run the application the data templates are not found.

I did some researching in reference source and found that Content Presenter will attempt to find the Data Template using a DataTemplateKey. The problem here is that DataTemplateKey use  the data type's (Model in the common assembly) assembly in its implementation of Resource Key.

Hi,

when starting-up my WPF application a splash screen in a separate thread is shown. Calling 'splash.Show()' (see code below) sometimes causes a NullReferenceException (see stack trace below). This NRE exception appears right after reboot of windows machine, at the first attempt to start the WPF application. All following application start-ups are successful.

The splash screen window is defined by Xaml using MVVM pattern.

Can anybody explain this behavior? Is this a Binding problem?

Code running in separate thread:

        public static void RunSplashScreenInSeparateThread()
        {
            var splash = new MarsSplashScreen();
            mSplashIsOn = true;
            splash.Show();
            splash.SetUpProgress(0, 20);
            mSplashScreen = splash;
            mSplashDispatcher = splash.Dispatcher;
            splash.Closed += (sender2, e2) => splash.Dispatcher.InvokeShutdown();
            if (!mSplashIsClosed) // check whether bootstrapper start-up succeeded. If not, dispatcher shall not run
                Dispatcher.Run();
        }

Stacktrace of NRE:

2013-08-16 15:43:17.3750 | ERROR | (8) | MarsApplication | Object reference not set to an instance of an object. | System.NullReferenceException: Object reference not set to an instance of an object.
   at MS.Internal.AssemblyHelper.IsXLinqCollectionPropertyImpl(PropertyDescriptor pd)
   at MS.Internal.AssemblyHelper.IsXLinqCollectionProperty(PropertyDescriptor pd)
   at MS.Internal.Data.ValueTable.ShouldCache(Object item, PropertyDescriptor pd)
   at MS.Internal.Data.DataBindEngine.RegisterForCacheChanges(Object item, Object descriptor)
   at MS.Internal.Data.PropertyPathWorker.ReplaceItem(Int32 k, Object newO, Object parent)
   at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
   at MS.Internal.Data.ClrBindingWorker.AttachDataItem()
   at System.Windows.Data.BindingExpression.Activate(Object item)
   at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
   at System.Windows.Data.BindingExpression.AttachOverride(DependencyObject target, DependencyProperty dp)
   at System.Windows.Data.BindingExpressionBase.Attach(DependencyObject target, DependencyProperty dp)
   at System.Windows.Data.BindingExpressionBase.OnAttach(DependencyObject d, DependencyProperty dp)
   at System.Windows.StyleHelper.GetInstanceValue(UncommonField`1 dataField, DependencyObject container, FrameworkElement feChild, FrameworkContentElement fceChild, Int32 childIndex, DependencyProperty dp, Int32 i, EffectiveValueEntry& entry)
   at System.Windows.StyleHelper.GetChildValueHelper(UncommonField`1 dataField, ItemStructList`1& valueLookupList, DependencyProperty dp, DependencyObject container, FrameworkObject child, Int32 childIndex, Boolean styleLookup, EffectiveValueEntry& entry, ValueLookupType& sourceType, FrameworkElementFactory templateRoot)
   at System.Windows.StyleHelper.GetChildValue(UncommonField`1 dataField, DependencyObject container, Int32 childIndex, FrameworkObject child, DependencyProperty dp, FrugalStructList`1& childRecordFromChildIndex, EffectiveValueEntry& entry, ValueLookupType& sourceType, FrameworkElementFactory templateRoot)
   at System.Windows.StyleHelper.GetValueFromTemplatedParent(DependencyObject container, Int32 childIndex, FrameworkObject child, DependencyProperty dp, FrugalStructList`1& childRecordFromChildIndex, FrameworkElementFactory templateRoot, EffectiveValueEntry& entry)
   at System.Windows.StyleHelper.ApplyTemplatedParentValue(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, DependencyProperty dp, FrameworkElementFactory templateRoot)
   at System.Windows.StyleHelper.InvalidatePropertiesOnTemplateNode(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, Boolean isDetach, FrameworkElementFactory templateRoot)
   at System.Windows.FrameworkTemplate.InvalidatePropertiesOnTemplate(DependencyObject container, Object currentObject)
   at System.Windows.FrameworkTemplate.HandleBeforeProperties(Object createdObject, DependencyObject& rootObject, DependencyObject container, FrameworkElement feContainer, INameScope nameScope)
   at System.Windows.FrameworkTemplate.<>c__DisplayClass6.<LoadOptimizedTemplateContent>b__3(Object sender, XamlObjectEventArgs args)
   at System.Xaml.XamlObjectWriter.OnBeforeProperties(Object value)
   at System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart(ObjectWriterContext ctx)
   at System.Xaml.XamlObjectWriter.WriteStartMember(XamlMember property)
   at System.Xaml.XamlWriter.WriteNode(XamlReader reader)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)
   at System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField)
   at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren)
   at System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)
   at System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container)
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.GridViewRowPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.UIElement.UpdateLayout()
   at System.Windows.Interop.HwndSource.SetLayoutSize()
   at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   at System.Windows.Interop.HwndSource.set_RootVisual(Visual value)
   at System.Windows.Window.SetRootVisual()
   at System.Windows.Window.SetRootVisualAndUpdateSTC()
   at System.Windows.Window.SetupInitialState(Double requestedTop, Double requestedLeft, Double requestedWidth, Double requestedHeight)
   at System.Windows.Window.CreateSourceWindow(Boolean duringShow)
   at System.Windows.Window.CreateSourceWindowDuringShow()
   at System.Windows.Window.SafeCreateWindowDuringShow()
   at System.Windows.Window.ShowHelper(Object booleanBox)
   at System.Windows.Window.Show()
   at RohdeSchwarz.API.Bootstrapper.Graphical.DynamicSplashScreen.RunSplashScreenInSeparateThread()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Xaml of splash screen (The image in this Xaml is of type 'svg' and it is not posted due to confidential matter):

<GraphicalShell:DynamicSplashScreen x:Class="RohdeSchwarz.API.Bootstrapper.Graphical.MarsSplashScreen"
                                    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                                    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                                    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d"
                                    xmlns:svg="http://sharpvectors.codeplex.com/runtime/"
                                    xmlns:GraphicalShell="clr-namespace:RohdeSchwarz.API.Bootstrapper.Graphical" x:Name="MarsSplashScreenControl"
                                    Width="640" Height="480" Background="White">

  <Border BorderBrush="Black" BorderThickness="1">
    <Grid>
      <Grid.RowDefinitions>
        <RowDefinition Height="85" />
        <RowDefinition Height="*" />
        <RowDefinition Height="40" />
      </Grid.RowDefinitions>

      <Image Grid.Row="0" Source="Icons/CMWtoolsSplashBanner.png" Height="85" />

      <Grid Grid.Row="1" Margin="18,5,18,5">
        <Grid.RowDefinitions>
          <RowDefinition Height="30" />
          <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <Grid Grid.Row="0">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
          </Grid.ColumnDefinitions>
          <TextBlock Grid.Column="0" Text="{Binding ApplicationName}" FontFamily="Arial" FontSize="26" FontWeight="Bold"
                     VerticalAlignment="Center" />
          <TextBlock Grid.Column="1" Text="{Binding ApplicationVersion, StringFormat=' V\{0\}'}" FontFamily="Arial"
                     FontSize="26" FontWeight="Bold" VerticalAlignment="Center" />
        </Grid>

        <Grid Grid.Row="1">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="230" />
            <ColumnDefinition Width="*" />
          </Grid.ColumnDefinitions>

          <Grid Grid.Column="0">
            <Image ... >

        </Grid>

          <Grid Grid.Column="1" Margin="10,0,0,0">
            <Grid.RowDefinitions>
              <RowDefinition Height="30" />
              <RowDefinition Height="*" />
              <RowDefinition Height="22" />
            </Grid.RowDefinitions>

            <TextBlock Text="Plug-ins" FontSize="16" FontFamily="Arial" VerticalAlignment="Center" />

            <ListView Grid.Row="1" ItemsSource="{Binding Features}">
              <ListView.Style>
                <Style TargetType="{x:Type ListView}">
                  <Setter Property="BorderBrush" Value="Black" />
                  <Setter Property="BorderThickness" Value="1" />
                  <Setter Property="Foreground" Value="Black" />
                </Style>
              </ListView.Style>
              <ListView.Resources>
                <Style x:Key="ListViewWithoutHeaderStyle" TargetType="{x:Type GridViewColumnHeader}">
                  <Setter Property="Visibility" Value="Collapsed" />
                </Style>
              </ListView.Resources>
              <ListView.View>
                <GridView x:Name="GridViewFeatures" ColumnHeaderContainerStyle="{StaticResource ListViewWithoutHeaderStyle}">
                  <GridViewColumn Header="Id" Width="140">
                    <GridViewColumn.CellTemplate>
                      <DataTemplate>
                        <TextBlock Text="{Binding Id}" FontSize="16" FontFamily="Arial" FontWeight="Bold"
                                   VerticalAlignment="Center" />
                      </DataTemplate>
                    </GridViewColumn.CellTemplate>
                  </GridViewColumn>
                  <GridViewColumn Header="Name" Width="110">
                    <GridViewColumn.CellTemplate>
                      <DataTemplate>
                        <TextBlock Text="{Binding Name}" FontSize="16" FontFamily="Arial" FontWeight="Bold"
                                   VerticalAlignment="Center" />
                      </DataTemplate>
                    </GridViewColumn.CellTemplate>
                  </GridViewColumn>
                  <GridViewColumn Header="Version" Width="100">
                    <GridViewColumn.CellTemplate>
                      <DataTemplate>
                        <TextBlock Text="{Binding Version}" FontSize="16" FontFamily="Arial" FontWeight="Bold"
                                   VerticalAlignment="Center" />
                      </DataTemplate>
                    </GridViewColumn.CellTemplate>
                  </GridViewColumn>
                </GridView>
              </ListView.View>
            </ListView>

            <TextBlock Grid.Row="2" Text="Copyright &#169; 2013 Rohde &amp; Schwarz. All rights reserved." FontFamily="Arial"
                       FontSize="12" HorizontalAlignment="Right" VerticalAlignment="Bottom" />
          </Grid>
        </Grid>
      </Grid>

      <Grid Grid.Row="2" Background="#FFDFE1E5">
        <Grid Grid.Row="1" VerticalAlignment="Center" Margin="18,0,18,0">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
          </Grid.ColumnDefinitions>
          <TextBlock Grid.Column="0" x:Name="ProgressMessageControl" Text="Loading..." FontSize="12" FontFamily="Arial"
                     VerticalAlignment="Center" />
          <ProgressBar Grid.Column="1" x:Name="ProgressBarControl" Height="16" Margin="10,0,0,0" VerticalAlignment="Center" />
        </Grid>
      </Grid>
    </Grid>
  </Border>
</GraphicalShell:DynamicSplashScreen>

Any help would be appreciated a lot!

Hi,

 I am facing issues, in TypeCasting the UserControl. In my scenario, the user control contains a TextBox and few buttons. When the LostFocus occurs from User control's Textbox, it raises the PreVIewLostFocus and goes to the respective event statements for execution. Here when, i try to typecast the control appeared in the Sender object, it is not recognized as a User control, instead it's only considered as a TextBox.

XAML code:

<commonviews:MyUC x:Name="uxMyUC" Text ="{Binding UserNameValue,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}"  
Width="415" PreviewLostKeyboardFocusCommand="{Binding LostFocusCommand, Mode=OneWay}" ></commonviews:MyUC>

The PreviewLostFocus is command is handled in View Model as below

 public virtual void LostFocus(System.Windows.RoutedEventArgs e)
        {

                   control = e.Source as Control;

                   //some code

                   if (control is MyUC)
                        {
                            //actions here
                        }

}

How can we correctly type cast the Control ?

Thanks in advance,

Sagar

Hi Friends,

I have a DataGrid, In that Defined a DataGridTemplateColumn with Custome View.

DataGrid Column is not Autosizing with its content. Kidnly suggesrt

<DataGrid >

        <DataGrid.Columns>
            <DataGridTemplateColumn Header="test1"  Visibility="{Binding MainVisi}">
                <DataGridTemplateColumn.HeaderTemplate>
                    <StackPanel Grid.Row="1" Orientation="Horizontal">
                        <TextBlock Text="{Binding temp1}" Visibility="{Binding Vis1}" ></TextBlock>
                        <TextBlock Text="{Binding temp2}" Visibility="{Binding vis2}" ></TextBlock>

 <TextBlock Text="{Binding temp3}" Visibility="{Binding vis3}" ></TextBlock>                     </StackPanel>
                </DataGridTemplateColumn.HeaderTemplate>
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <Border Margin="0">

                            <StackPanel Grid.Row="1" Orientation="Horizontal">
                                <TextBox Text="{Binding tempv1}" Visibility="{Binding Vis1}" Template="{StaticResource temp1}"></TextBox>
                                <TextBox Text="{Binding tempv2}" Visibility="{Binding vis2}" Template="{StaticResource temp2}"></TextBox>

 <TextBox Text="{Binding tempv3}" Visibility="{Binding vis3}" Template="{StaticResource temp2}"></TextBox>                             </StackPanel>
                        </Border>
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>

So when i hide(Collapsed) first one(temp1, tempv1) Header and Content controls. controls are disappear But Template column is not auto resizing.

Kinmdly Suggest

Jagadish

The title pretty much describes my question.

I have a CLR object that is used as a DataContext for ListBox items which are hosted on a Canvas.  In the CLR object I have DP's that are bound to the Canvas.Top and Left properties.  Now I want to animate those properties.

What I want to do is create an animation that uses those properties rather than the Top/Left of the ListBoxItems.  Is this possible?

Lloyd Sheen

I am creating an application where the user will be able to use the mousewheel to scroll through database records which are bound using MVVM.

I am trying to bind the mouse wheel scroll to a command in my ViewModel.

I have managed to setup the binding but i do not know how to determine which way the wheel was scrolled. Using the code behind, i know about using the Delta value, but how do i do this using XAML & MVVM?

<i:Interaction.Triggers><i:EventTrigger EventName="MouseWheel"><i:InvokeCommandAction Command="{Binding mouseScrollCommand}"/></i:EventTrigger></i:Interaction.Triggers>

public void mouseScrollCommand
{
//If mouseScrollUp, goto previous record
//If mouseScrollDown, goto next record
}

Our WPF application includes plate control which constains 96 vials.

Depend on each vial property, the vial background color changes.

We used to define default vial color as string and directly bind it to the vial' background.

private string _fillColor = "#000605";     //black

However, our industry designer want to change the vial default color as LinearGradientBrush

<LinearGradientBrush x:Key="VialBrush" StartPoint="0.5,0" EndPoint="0.5,1"><GradientStop Offset="1" Color="#FF6E6E6E" /><GradientStop Color="#FFC5C5C5" /></LinearGradientBrush>

So We need to reference LinearGradientBrush in ViewModel class.

How do we reference LinearGradientBrush in ViewModel?

Should we define LinearGradientBrush in Style.xaml and reference it by looking up the resource key?

Or should we directly define LinearGradientBrush in the ViewModel? Thx!

JaneC

A wonderful week of news and new technology advances from Build this week have filled our minds with new possiblilities!

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All you have to do is add an article to TechNet Wiki from your own specialist field. Something that fits into one of the categories listed on the submissions page. Copy in your own blog posts, a forum solution, a white paper, or just something you had to solve for your own day's work today.

Drop us some nifty knowledge, or superb snippets, and become MICROSOFT TECHNOLOGY GURU OF THE MONTH!

This is an official Microsoft TechNet recognition, where people such as yourselves can truly get noticed!

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#PEJL
Got any nice code? If you invest time in coding an elegant, novel or impressive answer on MSDN forums, why not copy it over toTechNet Wiki, for future generations to benefit from! You'll never get archived again, and you could win weekly awards!

Have you got what it takes o become this month's TechNet Technical Guru? Join a long list of well known community big hitters, show your knowledge and prowess in your favoured technologies!

Many Thanks & Best Regards, Hua Min

I can click both c1_button and c2_button in Example 2,

but, I can't click the c1_button in Example 1. Why?

Example 1:

<Grid Width="300" Height="300"><Button Name="c1_button" Width="50" Height="50"></Button><ScrollViewer Name="c2" Width="150" Height="150"><ScrollViewer.Style><Style  TargetType="{x:Type ScrollViewer}"><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type ScrollViewer}">
                                        <Grid>
                                            <Border BorderBrush="Blue" BorderThickness="25"></Border>
                                            <Button Name="c2_button" Width="50" Height="50" VerticalAlignment="Bottom" HorizontalAlignment="Right"></Button>
                                        </Grid></ControlTemplate></Setter.Value></Setter></Style></ScrollViewer.Style></ScrollViewer></Grid>

Example 2:

<Grid Width="300" Height="300"><Button Name="c1_button" Width="50" Height="50"></Button><TabControl Name="c2" Width="150" Height="150"><TabControl.Style><Style  TargetType="{x:Type TabControl}"><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type TabControl}">
                                        <Grid>
                                            <Border BorderBrush="Blue" BorderThickness="25"></Border>
                                            <Button Name="c2_button" Width="50" Height="50" VerticalAlignment="Bottom" HorizontalAlignment="Right"></Button>
                                        </Grid></ControlTemplate></Setter.Value></Setter></Style></TabControl.Style></TabControl></Grid>

hi all ! Actually i've an application in C# with WPF and i want to export to PDF a datagrid. I've found many tuto with DatagGridView but it's not the same way for WPF. this is my last try with iTextSharp :

dfPTable table = new PdfPTable(CmdGrid.Columns.Count);

            for (int j = 0; j < CmdGrid.Columns.Count; j++)
            {
                table.AddCell(new Phrase(CmdGrid.Columns[j].Header.ToString()));
            }

            table.HeaderRows = 1;

            for (int i = 0; i < CmdGrid.Items.Count; i++)
            {
                for (int k = 0; k < CmdGrid.Columns.Count; k++)
                {
                    if (CmdGrid[k, i].value != null)
                    {
                        table.AddCell(new Phrase(CmdGrid[k, i ].value.ToString()));
                    }
                }
            }

            pdfcommande.Add(table);

            iTextSharp.text.Paragraph firstpara = new iTextSharp.text.Paragraph("Test 1");
            pdfcommande.Add(firstpara);
            pdfcommande.Close();

I am Transferring the TextBox the values when I Selected from the ComboBox.

    public class Observable : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

And

 public class TblMusteri:Observable
    {
        private Int64 musteriId;
        public Int64 MusteriId
        {
            get { return musteriId; }
            set { musteriId = value; OnPropertyChanged("MusteriId"); }
        }
        private string ad;
        public string Ad
        {
            get { return ad; }
            set
            {
                ad = value;
                this.OnPropertyChanged("Ad");
            }
        }
        private string soyad;
        public string Soyad
        {
            get { return soyad; }
            set { soyad = value; this.OnPropertyChanged("Soyad"); }
        }
        private string unvan;
        public string Unvan
        {
            get { return unvan; }
            set { unvan = value; OnPropertyChanged("Unvan"); }
        }
        private string telefon;
        public string Telefon
        {
            get { return telefon; }
            set { telefon = value; OnPropertyChanged("Telefon"); }
        }

    }

And

 public class MusteriViewModel : Observable
    {
        public ObservableCollection<TblMusteri> musteriler = new ObservableCollection<TblMusteri>();
        public ObservableCollection<TblMusteri> Musteriler
        {
            get
            {
                return musteriler;
            }
            set
            {
                musteriler = value;
                OnPropertyChanged("Musteriler");
            }
        }
        private TblMusteri selectedItem = new TblMusteri();
        public TblMusteri SelectedItem
        {
            get
            {
                return selectedItem;
            }
            set
            {
                selectedItem = value;
                OnPropertyChanged("SelectedItem");
            }
        }
        public MusteriViewModel()
        {
            using (SqlConnection conn = new SqlConnection(@"Data Source=.\SQLEXPRESS;Initial Catalog=CustomerBase;Integrated Security=True"))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    cmd.Connection = conn;
                    cmd.CommandText = "Select* From MusteriBase Order by AD ASC;";
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    while (dr.Read() == true)
                    {
                        musteriler.Add(new TblMusteri()
                        {
                            Ad = dr["AD"].ToString(),
                            Soyad = dr["SOYAD"].ToString(),
                            Unvan = dr["UNVAN"].ToString(),
                            Telefon = dr["TELEFON"].ToString(),
                            MusteriId = (Int64)dr["mustID"]
                        });
                    }
                    cmd.Dispose();
                }
                conn.Close();
            }
        }
    }

<Canvas><ComboBox x:Name="cmbMusteriListele"
					  ItemsSource="{Binding Musteriler}"
					  SelectedValue="{Binding SelectedItem.MusteriId,Mode=TwoWay}"
					  DisplayMemberPath="Ad"
					  Width="236"
					  Height="26"
					  Canvas.Left="19"
					  Canvas.Top="24"/><TextBox TextWrapping="Wrap"
					 Text="{Binding ElementName=cmbMusteriListele,Path=SelectedItem.Ad,UpdateSourceTrigger=PropertyChanged}"
					 Width="236"
					 Canvas.Left="19"
					 Canvas.Top="214"
					 Height="30"/><TextBox Text="{Binding ElementName=cmbMusteriListele, Path=SelectedItem.Ad}"
					 Background="Beige" Width="236"
					 Canvas.Left="19"
					 Canvas.Top="74"
					 Height="30"/><TextBox Height="30"
					 Canvas.Left="19"
					 TextWrapping="Wrap"
					 Text="{Binding ElementName=cmbMusteriListele, Path=SelectedItem.Soyad}"
					 Canvas.Top="109"
					 Width="236"/><TextBox Text="{Binding ElementName=cmbMusteriListele, Path=SelectedItem.Unvan}"
					 Background="RosyBrown"
					 Width="236"
					 Canvas.Left="19"
					 Canvas.Top="144"
					 Height="30"/><TextBox Text="{Binding ElementName=cmbMusteriListele, Path=SelectedItem.Telefon}"
					 Background="Beige"
					 Width="236"
					 Canvas.Left="19"
					 Canvas.Top="179"
					 Height="30"/><TreeView   x:Name="CustomerTreeView"
						Cursor="Hand"
						Background="White"
						Height="285"
						Canvas.Left="273"
						Canvas.Top="24"
						Width="126"><TreeView.Resources><SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/><SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black"/></TreeView.Resources></TreeView></Canvas>

       public MainWindow()
        {
            InitializeComponent();
            DataContext = new MusteriViewModel();

        }

How do I transfer the values the TreeView while the ComboBox ıt is Selected ?

Thanks;

Hi,

I have got this piece of code from internet. I could not understand this.

https://github.com/briannoyes/WPFMVVM-StarterCode/blob/master/ZzaDashboard/ZzaDashboard/RelayCommand.cs

public class RelayCommand : ICommand
    {
        private Action _TargetExecuteMethod;
        private Func<bool> _TargetCanExecuteMethod;

        public RelayCommand(Action executeMethod)
        {
            _TargetExecuteMethod = executeMethod;
        }

        public RelayCommand(Action executeMethod, Func<bool> canExecuteMethod)
        {
            _TargetExecuteMethod = executeMethod;
            _TargetCanExecuteMethod = canExecuteMethod;
        }

        public void RaiseCanExecuteChanged()
        {
            CanExecuteChanged(this, EventArgs.Empty);
        }

        #region ICommand Members

        bool ICommand.CanExecute(object parameter)
        {
            if (_TargetCanExecuteMethod != null)
            {
                return _TargetCanExecuteMethod();
            }
            if (_TargetExecuteMethod != null)
            {
                return true;
            }
            return false;
        }

        // Beware - should use weak references if command instance lifetime is longer than lifetime of UI objects that get hooked up to command 
        // Prism commands solve this in their implementation 
        public event EventHandler CanExecuteChanged = delegate { };

        void ICommand.Execute(object parameter)
        {
            if (_TargetExecuteMethod != null)
            {
                _TargetExecuteMethod();
            }
        }

        #endregion
    }

    public class RelayCommand<T> : ICommand
    {
        private Action<T> _TargetExecuteMethod;
        private Func<T, bool> _TargetCanExecuteMethod;

        public RelayCommand(Action<T> executeMethod)
        {
            _TargetExecuteMethod = executeMethod;
        }

        public RelayCommand(Action<T> executeMethod, Func<T, bool> canExecuteMethod)
        {
            _TargetExecuteMethod = executeMethod;
            _TargetCanExecuteMethod = canExecuteMethod;
        }

        public void RaiseCanExecuteChanged()
        {
            CanExecuteChanged(this, EventArgs.Empty);
        }

        #region ICommand Members

        bool ICommand.CanExecute(object parameter)
        {
            if (_TargetCanExecuteMethod != null)
            {
                T tparm = (T) parameter;
                return _TargetCanExecuteMethod(tparm);
            }
            if (_TargetExecuteMethod != null)
            {
                return true;
            }
            return false;
        }

        // Beware - should use weak references if command instance lifetime is longer than lifetime of UI objects that get hooked up to command 
        // Prism commands solve this in their implementation 
        public event EventHandler CanExecuteChanged = delegate { };

        void ICommand.Execute(object parameter)
        {
            if (_TargetExecuteMethod != null)
            {
                _TargetExecuteMethod((T) parameter);
            }
        }

        #endregion
    }

But this works fine. I can use it like this.

 public RelayCommand TestRelayCommand { get; set; }
        public MainWindowViewModel()
        {
            TestRelayCommand = new RelayCommand(ShowMyView);
        }
        private void ShowMyView()
        {
            CurrentViewModel = _testViewModel;
        }

I did not understand the code. Can someone explain me how does this works? what is the execution flow?

Regards,

Ok, the images are inside a folder that is "inside the project" and the build action is resource. My question is how do I put those icons in a comboBox?

And I think this is not a duplicate because I did search and only find results where the folder is not embedded in the project.

Image: https://social.msdn.microsoft.com/Forums/getfile/835115

This is my code: (I got this from searching but I forgot the website)

List<object> items = new List<object>();
var assembly = Assembly.GetExecutingAssembly();
var resourcesName = assembly.GetName().Name + ".g.resources";
var stream = assembly.GetManifestResourceStream(resourcesName);
var resourceReader = new ResourceReader(stream);
foreach(DictionaryEntry item in resourceReader)
{
    items.Add(item.Value);
}
comboBox.ItemsSource = items;

//it's working but this is what I get
icons/bbinq.ico
icons/bbt.ico
icons/begr.ico
icons/logo 1.ico
icons/logo.ico
icons/mepv1.ico
icons/mepv2.ico
icons/sbtm.ico

//what I need is like this (case sensitive also)
BBINQ.ico
BBT.ICO
BEGR.ico
LOGO 1.ICO
LOGO.ICO
MEPV1.ico
MEPV2.ico
SBTM.ICO

Hi, I have a project written in c# wpf.
When the software is run the file softwarename.exe.config is created in the app folder and the file softwarename.exe.config is created in the folder C:\Users\username\AppData\Local\VirtualStore\Program Files\softwarename.

I have the need at the next relese to delete this files. how can I do?

Thanks in advanced.

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="367" Width="614"><Grid x:Name="gridHome" HorizontalAlignment="Left" Height="300" Margin="0,10,-52,-318" VerticalAlignment="Top" Width="600"><ListView x:Name="lsvOrder" Height="300" Margin="0,10,0,-10" VerticalAlignment="Top"><ListView.View><GridView><GridViewColumn Header="No" Width="60" DisplayMemberBinding="{Binding NUMBER}"></GridViewColumn><GridViewColumn Header="Order No" Width="120" DisplayMemberBinding="{Binding ORDER}"></GridViewColumn><GridViewColumn Header="table" Width="120" DisplayMemberBinding="{Binding TABLE}"></GridViewColumn><GridViewColumn Header="Order Info" Width="150" DisplayMemberBinding="{Binding ORDER_TIMER}"></GridViewColumn><GridViewColumn Header="Table Info" Width="150" DisplayMemberBinding="{Binding TABLE_TIMER}"></GridViewColumn></GridView></ListView.View></ListView></Grid></Window>

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            lsvOrder.Items.Add(new ListViewData("1", "0001", "T1", "Timer1", "Timer4"));
            lsvOrder.Items.Add(new ListViewData("2", "0002", "T2", "Timer2", "Timer5"));
            lsvOrder.Items.Add(new ListViewData("3", "0003", "T3", "Timer3", "Timer6"));
        }
    }

    public class ListViewData
    {
        public ListViewData(string col1, string col2, string col3, string col4, string col5)
        {
            NUMBER = col1;
            ORDER = col2;
            TABLE = col3;
            ORDER_TIMER = col4;
            TABLE_TIMER = col5;
        }

        public string NUMBER { get; set; }
        public string ORDER { get; set; }
        public string TABLE { get; set; }
        public string ORDER_TIMER { get; set; }
        public string TABLE_TIMER { get; set; }
    }

Hello~

how to change row background colour?

Thecolorwillchangefrequently.

I want Code(C#).

Note: The color settingswill bein color table.

Note: Colors arechanged by acertain time.

Please, answer.

Hi,

I have a wpf application in which I am using MarkupExtension for language translation. For string translation present as binding, I am using a converter. The code works fine for binding but fails when the binding is present in Datatemplate. I am not getting how to handle the string translation and return correct value from provideValue function. Below is the code: -

<ComboBox
                Name="LanguageCombo"
                ItemsSource="{Binding Languages}"
                Margin="8"
                DisplayMemberPath="NativeName"
                SelectedItem="{Binding SelectedLanguage, Mode=TwoWay}"></ComboBox><TextBlock Text="{local:Translate LocalizedByMarkupExtension}" Margin="8" /><TextBlock Text="{local:Translate {Binding Color}}" Margin="8" /><ComboBox Foreground="White"
                          Width="154"
                          Height="28px"
                          FontSize="13px"
                          VerticalContentAlignment="Center" ItemsSource="{Binding SortOptionsListView}"
                          IsSynchronizedWithCurrentItem="True"><ComboBox.ItemTemplate><DataTemplate><TextBlock Text="{local:Translate {Binding SortOptionID}}" Foreground="Black"/></DataTemplate></ComboBox.ItemTemplate></ComboBox>

    public class TranslateExtension : MarkupExtension
    {
        private WeakReference bindObj;
        private WeakReference targetObject;
        private DependencyProperty targetProperty;

        #region Construction

        /// <summary>
        /// Initializes a new instance of the <see cref="TranslateExtension"/> class.
        /// </summary>
        /// <param name="key">The key.</param>
        public TranslateExtension(object objToBeTranslated)
        {
            if (objToBeTranslated is string)
            {
                Key = objToBeTranslated as string;
            }
            else
            {
                bindObj = new WeakReference(objToBeTranslated as Binding);
                var _tempBind = objToBeTranslated as Binding;
                if (_tempBind.Converter != null)
                {
                    IValueConverter _existingConverter = _tempBind.Converter;
                    var _chainedConverter = new ValueConverterGroup();
                    _chainedConverter.Converters.Add(_existingConverter);
                    // FIXME - Take from a static resource
                    _chainedConverter.Converters.Add(new TranslationValueConverter());
                    _tempBind.Converter = _chainedConverter;
                }
                else
                {
                    // FIXME - Do not re-create. Take from a static resourceagbhb
                    _tempBind.Converter = new TranslationValueConverter();
                }
            }
        }

        public TranslateExtension()
        {
        }

        #endregion

        [ConstructorArgument("Key")]
        public string Key { get; set; }

        private Binding BindObj
        {
            get
            {
                if (null != bindObj && bindObj.IsAlive)
                {
                    return bindObj.Target as Binding;
                }
                else
                {
                    return null;
                }
            }
        }

        /// <summary>
        /// See <see cref="MarkupExtension.ProvideValue" />
        /// </summary>
        public override object ProvideValue(IServiceProvider pServiceProvider)
        {
            if (null != Key)
            {
                var _service = pServiceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
                if (_service != null)
                {
                    targetProperty = _service.TargetProperty as DependencyProperty;
                    if (targetProperty != null)
                    {
                        if (_service.TargetObject is DependencyObject)
                        {
                            targetObject = new WeakReference(_service.TargetObject);
                            TranslationHelper.Instance.AddTargetExtension(this);
                        }
                    }
                }
                return TranslationManager.Instance.Translate(Key);
            }
            else
            {
                //check if the extension is evaluated for template or real control
                //we just need to test whether the type of TargetObject is System.Windows.SharedDP
                var target = pServiceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
                if (target != null)
                {
                    if (target.TargetObject.GetType().FullName == "System.Windows.SharedDp")
                    {
                        return this;
                    }
                }
                if (BindObj == null)
                    return null;
                //Do this only when you need dynamic language switching
                var _be = BindObj.ProvideValue(pServiceProvider) as BindingExpression;
                TranslationHelper.Instance.AddBindingExpression(_be);
                return _be;
            }
        }

        /// <summary>
        /// Updates the value of the localized object.
        /// </summary>
        internal void UpdateTargetValue()
        {
            if (targetProperty != null)
            {
                if (targetObject.IsAlive)
                {
                    var _dTargetObject = targetObject.Target as DependencyObject;
                    if (_dTargetObject != null)
                    {
                        //;
                        var _element = _dTargetObject as UIElement;
                        if (null != _element)
                        {
                            _element.Dispatcher.Invoke(
                                new Action(
                                    () =>
                                    {
                                        _dTargetObject.SetValue(targetProperty,
                                                                TranslationManager.Instance.Translate(Key));
                                    }));
                        }
                    }
                }
            }
        }
    }

   [ValueConversion(typeof (String), typeof (String))]
    public class TranslationValueConverter : IValueConverter
    {
        #region IValueConverter Members

        object IValueConverter.Convert(
            object pValue, Type pTargetType, object pParameter, CultureInfo pCulture)
        {
            return TranslationManager.Instance.Translate(pValue as string) as string;
        }

        object IValueConverter.ConvertBack(
            object pValue, Type pTargetType, object pParameter, CultureInfo pCulture)
        {
            throw new NotSupportedException("ConvertBack not supported.");
        }

        #endregion
    }

Regards,

Sharda.

Dear all,

I have a wpf application which is connected to Azure through web service in order to collect data.

I have notice that with free edition of SQL database you are limited to number of outpout  size you can get from the azure limited to 160mb per day.

I was planning from that point to try to implement a good caching when dealing with data that I donwload from Azure db.

What could be the way to implement those caching n order to avoid pinging the portal for new data if no need ?

Sample will help

regards 

I have a Listbox control in my XAML window which will show around 500 items at runtime. I need to be able to navigate the list using the keyboard.

For example in Windows Explorer, when we type a key "a" it will automatically select an item which start with the key a. This will provide more usability to user. I have done this by IsTextSearchEnabled but if there are items starting with "a" and "aa" in the list of items, then it navigates to the item starting with "aa" when I type "a" second time. It is not navigating to next item that starts with "a". I want it to navigate to next item that starts with a. Does anyone know how to solve this?

Here is my code so far:

<ListViewx:Name="lstOS2200Items"Width="auto"Margin="15,8,15,2"Grid.Column="0"Grid.Row="1"VerticalContentAlignment="Stretch"VerticalAlignment="Stretch"SelectionChanged="lstOS2200Items_SelectionChanged"HorizontalContentAlignment="Stretch"HorizontalAlignment="Stretch"KeyDown="lstOS2200Items_KeyDown"IsTextSearchEnabled="True"TextSearch.TextPath="ElementName"SelectionMode="Single">

Hey guys,

So i need some help with my wpf application. i have a datagrid(see below) and in that datagrid i have some url's.

When you click on a url it links to a file that's inside of a protected zip file. the problem is that i cant open the file because it's inside the protected zip file and i needs to stay inside of the zip file.

XAML code:

<DataGrid AutoGenerateColumns="False" IsReadOnly="True" x:Name="gvData" SelectionMode="Single" FontSize="15" Padding="5" Background="white" Margin="230,178,0,10" Grid.RowSpan="2"><DataGrid.Columns><DataGridTextColumn Binding="{Binding media_name}" Header="Name" MaxWidth="150" /><DataGridHyperlinkColumn Binding="{Binding media_url}" Header="Url"><DataGridHyperlinkColumn.ElementStyle><Style><EventSetter Event="Hyperlink.Click" Handler="Hyperlink_Click"/></Style></DataGridHyperlinkColumn.ElementStyle></DataGridHyperlinkColumn><DataGridTextColumn Binding="{Binding media_terms}" Header="Terms" MaxWidth="150" /></DataGrid.Columns></DataGrid>

i use the Dotnetzip class library for the zipping. How can i open the file that's inside the protected zip file, in it's default program by clicking on the hyperlink. I tryed the extract option on the website of dotnetzip but it doesn't work.

c# CODE:

private void Hyperlink_Click(object sender, RoutedEventArgs e)
        {
            Hyperlink link = (Hyperlink)e.OriginalSource;
            Process.Start(link.NavigateUri.AbsoluteUri);
        }