Re: Dock DataGrid's column to the right - WPF Discussion Boards

Re: AForge VideoSourcePlayer

11-Mar-20 13:56

I'm trying to get the AForge VideoSourcePlayer to work in a WPF app. It's a WinForms control hosted in a WindowsFormsHost. I can't get this to work ina WinForms app either, but I'm targeting WPF in the end.

XAML

<Grid>

<pre>
<Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
    <RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto"/>
    <ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>

<Button Grid.Row="0" 
        Grid.Column="0"
        x:Name="connectBt"
        Height="32"
        Width="100"
        Margin="10,0,2,0"
        Click="ConnectBt_Click"
        Content="Connect"/>

<Button Grid.Row="0" 
        Grid.Column="1"
        x:Name="disconnectBt"
        Height="32"
        Width="100"
        Margin="2,10,10,10"
        Click="DisconnectBt_Click"
        Content="Disconnect"/>

<wfi:WindowsFormsHost Grid.Row="1"
                        Grid.Column="0"
                        Grid.ColumnSpan="2">
    <aforge:VideoSourcePlayer x:Name="videoSourcePlayer" 
                                Dock="Fill"/>
</wfi:WindowsFormsHost>

Code Behind

public partial class MainWindow : Window
{
    #region CTOR
    public MainWindow()
    {
        InitializeComponent();

        this.DataContext = this;

        videoSourcePlayer.NewFrame += VideoSourcePlayer_NewFrame;
        videoSourcePlayer.Height = 320;
        videoSourcePlayer.Width = 320;
    }
    #endregion

    #region Private Methods
    private void Connect()
    {
        FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

        if (videoDevices.Count == 0)
        {
            throw new ApplicationException();
        }

        var selectdDevice = videoDevices[0].MonikerString;
        VideoCaptureDevice videoSource = new VideoCaptureDevice(selectdDevice);

        OpenVideoSource(videoSource);
    }

    private void Disconnect()
    {
        if (videoSourcePlayer.VideoSource != null)
        {
            videoSourcePlayer.SignalToStop();
            videoSourcePlayer.WaitForStop();
        }
    }

    private void HandleNewFrame(ref Bitmap image)
    {
        //TODO: handle this later
    }

    private void OpenVideoSource(IVideoSource source)
    {
        videoSourcePlayer.SignalToStop();
        videoSourcePlayer.WaitForStop();
        videoSourcePlayer.VideoSource = source;
        videoSourcePlayer.Start();
    }
    #endregion

    #region Event Handlers
    private void Window_Unloaded(object sender, RoutedEventArgs e)
    {
        Disconnect();
    }

    private void ConnectBt_Click(object sender, RoutedEventArgs e)
    {
        Connect();
    }

    private void DisconnectBt_Click(object sender, RoutedEventArgs e)
    {
        Disconnect();
    }

    private void VideoSourcePlayer_NewFrame(object sender, ref Bitmap image)
    {
        HandleNewFrame(ref image);
    }
    #endregion
}
When I run this, the VideoSourcePlayer displays "Connecting..." but i never does. The camera moniker string is "@device:pnp:\\?\usb#vid_046d&pid_082d&mi_00#6&39ab8351&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global". it's a Logitech USB camera.

Anyone have any experience with this?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Member 1578352130-Sep-22 19:27

Member 15783521

30-Sep-22 19:27

Adding background as Transparent for WindowsFormsHost worked for me.

<wfi:windowsformshost x:name="VideoSourceWindowsFormsHost" width="100" height="50" grid.row="2" grid.column="1"
="" background="Transparent">
<controls:videosourceplayer x:name="videoSourcePlayer" width="250" height="250">

TextBox DynamicResource Not Working

Kevin Marois19-Feb-20 8:39

Dock DataGrid's column to the right

19-Feb-20 8:39

I copied the TextBox template from here into my resources. I just want to study it and see how things work, and the TextBox seems simple enough.

I created a a CustomControl of type TextBox called TextBoxEx. I pasted the style into the Generic.xml in the Themes folder, and it doesn't work.

With this code line of in the CTOR, the Border doesn't show up.

public class TextBoxEx : TextBox
{
    static TextBoxEx()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(TextBoxEx), new FrameworkPropertyMetadata(typeof(TextBoxEx)));
    }
}

If I comment the line out, the border appears.

if go into the style and change

<Border.BorderBrush>
    <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
</Border.BorderBrush>

to a StaticResource

<Border.BorderBrush>
    <SolidColorBrush Color="{StaticResource BorderMediumColor}" />
</Border.BorderBrush>

Then it works ok.

What's going on here?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Mc_Topaz9-Feb-20 21:46

Mc_Topaz

9-Feb-20 21:46

I have this DataGrid with three columns:

HTML

<DataGrid>
    <DataGrid.Columns>
        <DataGridTextColumn Header="Col1" Width="100" />
        <DataGridTextColumn Header="Col2" Width="Auto" />
        <DataGridTextColumn Header="Col3" Width="100" />
    </DataGrid.Columns>
</DataGrid>

I would like 'Col3' to always be at the right side of the DataGris regardless how wide the DataGrid is.
Since 'Col1' and 'Col3' has fixed widths, 'Col2' is free to dynamically change width.

Is this possible to "Dock" 'Col3' to the right side of the DataGrid?

I'm looking for a solution simular to a DockPanel:

HTML

<DataGrid LastChildFill="true">
    <Label Content="Col1" DockPanel.Dock="Left" />
    <Label Content="Col3" DockPanel.Dock="Right" />
    <Label Content="Col2" />
</DockPanel>

Re: Dock DataGrid's column to the right

Gerry Schmitz10-Feb-20 2:33

Re: Dock DataGrid's column to the right

10-Feb-20 2:33

You mean "visible"? If you define it "on the right", it stays there. If the preceding columns are "too wide", you have to add scroll bars.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Richard Deeming10-Feb-20 8:55

Richard Deeming

10-Feb-20 8:55

You can "freeze" one of more columns, but only on the left-hand side:
DataGrid.FrozenColumnCount Property (System.Windows.Controls) | Microsoft Docs[^]
You might be able to make it appear on the right-hand side with a custom template, but it would probably require a lot of work.

If you just want column 2 to fill the remaining space, set its width to *:

XAML

<DataGridTextColumn Header="Col2" Width="*" />

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Dock DataGrid's column to the right

Mc_Topaz10-Feb-20 21:24

Mc_Topaz

10-Feb-20 21:24

Hum... too bad...

Thanks for the reply anyway!

[WPF] Datagrid With Dynamic column

mjaniaut4-Feb-20 19:57

mjaniaut

4-Feb-20 19:57

I want to create a datagrid with dynamic row and column.

I know how create a datagrid and bind the Itemsource.

How define the dynamic column ?

Perhaps you have a short example.

<DataGrid
                x:Name="ListViewFiles"
                MaxWidth="2560"
                MaxHeight="1600"
                AutoGenerateColumns="False"
                CanUserAddRows="False"
                CanUserSortColumns="True"
                CellStyle="{StaticResource Content_DataGrid_Centering}"
                DockPanel.Dock="Top"
                EnableColumnVirtualization="True"
                EnableRowVirtualization="True"
                ItemsSource="{Binding Path=CloudInterface.ListViewFile}"
                PreviewMouseLeftButtonDown="Drag_PreviewMouseLeftButtonDown"
                PreviewMouseMove="ListViewFiles_PreviewMouseMove"
                RowHeaderWidth="0"
                ScrollViewer.CanContentScroll="True"
                ScrollViewer.HorizontalScrollBarVisibility="Auto"
                ScrollViewer.VerticalScrollBarVisibility="Auto"
                SelectionMode="Single">
                <DataGrid.Columns>
                    <DataGridTextColumn Binding="{Binding ConfigItem.MostRecentConfigFile.Product}">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <DockPanel>
                                    <Label Content="{Binding Lab_Product, Source={StaticResource Resources}}" />
                                </DockPanel>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                        <DataGridTextColumn.ElementStyle>
                            <Style TargetType="{x:Type TextBlock}">
                                <Setter Property="Margin" Value="5" />
                                <Setter Property="Padding" Value="5" />
                            </Style>
                        </DataGridTextColumn.ElementStyle>
                    </DataGridTextColumn>
                    <DataGridTextColumn Binding="{Binding ConfigItem.MostRecentConfigFile.ArchitectureSoftwareVersion}">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <DockPanel>
                                    <Label Content="{Binding Lab_Version, Source={StaticResource Resources}}" />
                                </DockPanel>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                        <DataGridTextColumn.ElementStyle>
                            <Style TargetType="{x:Type TextBlock}">
                                <Setter Property="Margin" Value="5" />
                                <Setter Property="Padding" Value="5" />
                            </Style>
                        </DataGridTextColumn.ElementStyle>
                    </DataGridTextColumn>
               </DataGrid.Columns>
            </DataGrid>

Re: [WPF] Datagrid With Dynamic column

Gerry Schmitz4-Feb-20 21:21

c# - programmatically add column & rows to WPF Datagrid - Stack Overflow

4-Feb-20 21:21

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Re: [WPF] Datagrid With Dynamic column

Richard Deeming5-Feb-20 0:48

Richard Deeming

5-Feb-20 0:48

DataGrid.AutoGenerateColumns Property (System.Windows.Controls) | Microsoft Docs[^]
How to - Customize Auto-Generated Columns in the DataGrid Control - Windows Community Toolkit | Microsoft Docs[^]

NB: The built-in DataGrid control used to be provided as part of the "community toolkit". There may be some minor differences, but most articles that apply to the old community toolkit version will still apply to the built-in version.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Im new bie help me fix 1 erorr on wpf, i cant do it?

Member 1468037212-Jan-20 16:07

Member 14680372

12-Jan-20 16:07

I have set up the calculation program for the program, but now the problem is that I want to integrate the two classes together but it still is not compatible so you can help me! Textblock caculator not show Only one class can be implemented! code see here :

https://pastebin.com/AnKXHgvg?fbclid=IwAR3pEa1RjQrrvMNTq8wTfZNvmAwBJJehwf_6UoFK7h96lKSmpOZiatPGB9M

https://pastebin.com/qzPDwvzJ?fbclid=IwAR3dP3Ef3Lo2SSmk9sSLOzrCxy0tZC5Hczpl76SX8TmzdX2cFfr1RmWayhI

sql data :
https://i.stack.imgur.com/pCgiK.png[^]

Re: Im new bie help me fix 1 erorr on wpf, i cant do it?

Richard MacCutchan12-Jan-20 22:12

Richard MacCutchan

12-Jan-20 22:12

Please post proper details of your problem. People here cannot guess what your code is doing.

Re: Im new bie help me fix 1 erorr on wpf, i cant do it?

ZurdoDev13-Jan-20 1:07

ZurdoDev

13-Jan-20 1:07

Edit your question and post just the relevant code. Don't expect people to follow links to who knows what.

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Fight for left-handed rights and hand equality.

RoutedEvent Pass EventArg

Kevin Marois11-Jan-20 16:42

11-Jan-20 16:42

I have added a Routed Event to a user control:

public static readonly RoutedEvent ItemChangedEvent =
            EventManager.RegisterRoutedEvent("ItemChanged",
            RoutingStrategy.Bubble,
            typeof(RoutedEventHandler),
            typeof(DropDownEntryView));

public event RoutedEventHandler ItemChanged
{
    add { AddHandler(ItemChangedEvent, value); }
    remove { RemoveHandler(ItemChangedEvent, value); }
}

private void RaiseItemChangedEvent(string newValue, string oldValue)
{
    var args = new ItemChangedEventArgs(ItemChangedEvent, newValue, oldValue);
    RaiseEvent(args);
}

Here is the ItemChangedEventArgs class:

public class ItemChangedEventArgs : RoutedEventArgs
{
    public string NewValue { get; private set; }

    public string OldValue { get; private set; }

    public ItemChangedEventArgs(RoutedEvent routedEvent, string newValue, string oldValue)
        : base(routedEvent)
    {
        NewValue = newValue;
        OldValue = OldValue;
    }
}

The XAML

<ctrls:DropDownEntryView Grid.Column="0" 
                            Items="{Binding DataContext.EmailItems, 
                                            ElementName=clientsView,  
                                            Mode=TwoWay, 
                                            UpdateSourceTrigger=PropertyChanged}" 
                            EditBarCaption="Edit Emails..."
                            ShowEditBar="True"
                            ItemCategoryKey="email_types"
                            HorizontalAlignment="Left"
                            Width="400"
                            Margin="5">

<pre>
<i:Interaction.Triggers>
    <i:EventTrigger EventName="ItemChanged">
        <i:InvokeCommandAction Command="{Binding ElementName=clientsView, Path=DataContext.EmailItemChangedCommand}" 
                                CommandParameter="{Binding}"/>
    </i:EventTrigger>
</i:Interaction.Triggers>

How do I pass the ItemChangedEventArgs in the XAML?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Gerry Schmitz11-Jan-20 20:24

11-Jan-20 20:24

I would load a list of user controls and use Property Changed instead. Less code.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Kevin Marois12-Jan-20 10:05

12-Jan-20 10:05

I'm developing some user controls. I want to be able to publish events and pass custom args

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Gerry Schmitz13-Jan-20 13:23

13-Jan-20 13:23

I add "actions" and "functions" to the controls that are wired at will:

public (static) Action<object, object=""> Hook = (o1, o2) => {};

...Hook = MyAction;

...
Hook( this, arg );

...
void MyAction( object sender, object arg ) { ... }

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Kevin Marois14-Jan-20 5:18

14-Jan-20 5:18

I think I understand this. Can you show me an example of coding it in the usercontrol and how it's wired up in the parent window's XAML?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Kevin Marois14-Jan-20 5:43

14-Jan-20 5:43

What do you think of the accepted answer here: c# - event Action<> vs event EventHandler<> - Stack Overflow ?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Richard Deeming13-Jan-20 8:00

Richard Deeming

13-Jan-20 8:00

According to GitHub, if you don't set the CommandParameter or Converter properties, you should get the EventArgs passed to your command:
EventArgs as CommandParameter on InvokeCommandAction · Issue #126 · microsoft/XamlBehaviors · GitHub[^]

If that doesn't work, there are several alternatives suggested in this SO thread:
wpf - MVVM Passing EventArgs As Command Parameter - Stack Overflow[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Kevin Marois14-Jan-20 9:02