Re: How to set DataSource for DataGridView in WPF - WPF Discussion Boards

Try using the PreviewKeyDown event. This seemed to work ok.

<Window x:Class="ImTextbox.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="355" Width="498">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="250*" />
            <RowDefinition Height="67*" />
        </Grid.RowDefinitions>
        <ItemsControl x:Name="listbox">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <Border BorderBrush="Chartreuse" BorderThickness="2" CornerRadius="5" Margin="2" >
                        <ContentPresenter Content="{Binding}" Margin="4"/>
                    </Border>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
        <TextBox AcceptsReturn="True" x:Name="textbox" Grid.Row="1" Margin="4" />
    </Grid>
</Window>

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
        textbox.PreviewKeyDown += new KeyEventHandler(textbox_PreviewKeyDown);
    }

    void textbox_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter && (e.KeyboardDevice.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift)
        {
            listbox.Items.Add(textbox.Text);
            textbox.Clear();
            e.Handled = true;
        }
    }
    
}

I need this structure (DataGridView id DataTemplate) and I have problem with DataSource. I tried to find gridview and set DataSource in code-behind, but InvalidOperationException is showing : "This operation is valid only on elements that have this template applied."
I think I have applied this template.
Could somebody please help me how to set DataSource? DataSource can be set any way.

WpfWindow.xaml

<Window 
        x:Class="WPFAppl.WpfWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 	
        xmlns:local="clr-namespace:WPFAppl" 
        Title="Title"  
        Height="200"  
        Width="400"          
        WindowStartupLocation="CenterScreen"  
        Name="This"          
        Loaded="UserControl_Loaded">
    <window.resources>
        <datatemplate x:key="ThisTemplate"> 
           <grid> 
                <grid.rowdefinitions> 
                    <rowdefinition height="*" /> 
                </grid.rowdefinitions> 
                <stackpanel orientation="Horizontal">
                            Grid.Row="0"> 
                    <windowsformshost width="360">
                                      xmlns="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"> 
                        <datagridview x:name="gridView"> 
                                      AllowUserToAddRows="False" 
                                      SelectionMode="FullRowSelect" 
                                      EditMode="EditProgrammatically" 
                                      xmlns="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms">
                        </datagridview >
                    </windowsformshost > 
                </stackpanel> 
            </grid> 
        </datatemplate > 
    </window.resources > 
</window >

WpfWindow.xaml.cs

using System;    
using System.Collections.Generic;    
using System.Linq;   
using System.Text;   
using System.Windows;    
using System.Windows.Controls;   
using System.Windows.Data;   
using System.Windows.Documents;      
using System.Windows.Input;      
using System.Windows.Media;      
using System.Windows.Media.Imaging;      
using System.Windows.Navigation;     
using System.Windows.Shapes;     
using System.ComponentModel;     
using System.Collections.ObjectModel;    
using System.Xml;    
using System.Data;   
using System.Globalization; 
using System.Windows.Threading; 
using System.Threading; 
 
namespace WPFAppl 
{       /// <summary>        
    /// Interaction logic for Window1.xaml       
    /// </summary>       
    public partial class WpfWindow : Window 
    { 
        public WpfWindow()  
        {  
            InitializeComponent();  
        } 
 
        private DataTemplate ChildTemplate; 
        private ContentPresenter ParentTemplate; 
        private DataTable dt; 
 
        private void UserControl_Loaded(object sender, RoutedEventArgs e) 
        { 
            this.ContentTemplate = FindResource("ThisTemplate") as DataTemplate; 
            ChildTemplate = FindResource("ThisTemplate") as DataTemplate; 
            ParentTemplate = FindVisualChild<contentpresenter>(This); 
            dt = new DataTable(); 
            dt.Columns.Add("attr1", typeof(string)); 
            dt.Columns.Add("attr2", typeof(string)); 
            dt.Columns.Add("attr3", typeof(string)); 
            System.Windows.Forms.DataGridView gw1 = ChildTemplate.FindName("gridView", ParentTemplate) as System.Windows.Forms.DataGridView; 
            gw1.DataSource = dt; 
        } 
 
        //find element in visual tree 
        private childItem FindVisualChild<childitem>(DependencyObject obj) where childItem : DependencyObject 
        { 
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++) 
            { 
                DependencyObject child = VisualTreeHelper.GetChild(obj, i); 
                if (child != null && child is childItem) 
                    return (childItem)child; 
                else 
                { 
                    childItem childOfChild = FindVisualChild<childitem>(child); 
                    if (childOfChild != null) 
                        return childOfChild; 
                } 
            } 
            return null; 
        } 
    } 
}  </childitem></childitem></contentpresenter>

modified on Saturday, December 13, 2008 5:24 PM

Can you fix your post?

Change all "<" to "<" and ">" to "&gt";

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Thank you, code os now OK Big Grin | :-D

I somebody know, how to set DataSource for DataGridView in this application, I would be happy

Without even getting in to the code behind...

All you have is a data template. Without a visual element in existence based
on the template, there's no visual tree to search Smile | :)

I'm not sure what you are trying to do with the template, but if you just want
to see it work, here's a starting point:

<Window x:Class="WPFAppl.WpfWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
    Title="Title" 
	Height="200" 
	Width="400" 
	WindowStartupLocation="CenterScreen" 
	Loaded="Window_Loaded">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal" Grid.Row="0">
            <WindowsFormsHost Width="360" >
                <wf:DataGridView x:Name="gridView" 
                                  AllowUserToAddRows="False" 
                                  SelectionMode="FullRowSelect" 
                                  EditMode="EditProgrammatically" >
                </wf:DataGridView >
            </WindowsFormsHost >
        </StackPanel>
    </Grid>
</Window>


        private DataTable dt;
		
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            dt = new DataTable();
            dt.Columns.Add("attr1", typeof(string));
            dt.Columns.Add("attr2", typeof(string));
            dt.Columns.Add("attr3", typeof(string));
            gridView.DataSource = dt;
        }

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

I know that works this way, but I need to have that template in DataTemplate because of my application where I need to change more templates. In one of that templates I need to have DataGridView and somehow set DataSource.
Don´t you know please another way how to set DataSource for that XAML in my first message?

You can't set the datasource on an element until the element actually exists.

A template is just a template - "Describes the visual structure of a data object".

What are you trying to achieve?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

I´m trying to do some applicaton where in one template I would use DataGridView and in another template I wouldn´t use DataGridView. DataTemplates have another structure (different number of rows, columns in Grid...) I tried something... I set DataSource somehow, but when I change DataTemplate and then again change to the first DataTemplate with DataGridView, DataSource isn´t set Frown | :-(

) (sample code below)

WpfWindow.xaml

<Window x:Class="WPFAppl.WpfWindow" 	    
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 	    
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 	    
        xmlns:local="clr-namespace:WPFAppl" 	    
        Title="Title" 
        Height="200"
        Width="400"	    
        WindowStartupLocation="CenterScreen" 
        Name="This" 	    
        Loaded="UserControl_Loaded"
        SizeChanged="gridView_SelectionChanged">
    <Window.Resources>
        <DataTemplate x:Key="ThisTemplate">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>
                <StackPanel Orientation="Horizontal" 
                            Grid.Row="0" >
                    <WindowsFormsHost Width="360" 
                                      xmlns="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration">
                        <DataGridView x:Name="gridView" 
                                      AllowUserToAddRows="False"
                                      SelectionMode="FullRowSelect"    
                                      EditMode="EditProgrammatically"
                                      xmlns="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms" >
                        </DataGridView>
                    </WindowsFormsHost>
                </StackPanel>
                <Button Height="22.5" Grid.Row="2" Name="button1" Width="75" Click="button1_ClickT1">Button</Button>
            </Grid >
        </DataTemplate>
        <DataTemplate x:Key="SecondTemplate">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                <Label Grid.Row="0" Grid.Column="1" Name="label1" Width="120">Second template</Label>
                <Button Height="22.5" Grid.Row="1" Name="button1" Width="75" Click="button1_Click">Button</Button>
            </Grid>
        </DataTemplate>
    </Window.Resources>
</Window>

WpfWindow.xaml.cs

using System; 	
using System.Collections.Generic; 	
using System.Linq; 	
using System.Text; 	
using System.Windows; 	
using System.Windows.Controls; 	
using System.Windows.Data; 	
using System.Windows.Documents; 	
using System.Windows.Input; 	
using System.Windows.Media; 	
using System.Windows.Media.Imaging; 	
using System.Windows.Navigation; 	
using System.Windows.Shapes; 	
using System.ComponentModel; 	
using System.Collections.ObjectModel; 	
using System.Xml; 	
using System.Data; 	
using System.Globalization;
using System.Windows.Threading;
using System.Threading;

namespace WPFAppl
{ 	    /// <summary> 	    
    /// Interaction logic for Window1.xaml 	    
    /// </summary> 	    
    public partial class WpfWindow : Window
    {
        public WpfWindow() 
        { 
            InitializeComponent(); 
        }

        private DataTemplate ChildTemplate;
        private ContentPresenter ParentTemplate;
        private DataTable dt;

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            dt = new DataTable();
            dt.Columns.Add("attr1", typeof(string));
            dt.Columns.Add("attr2", typeof(string));
            dt.Columns.Add("attr3", typeof(string));
            System.Windows.Forms.DataGridView gw1 = ChildTemplate.FindName("gridView", ParentTemplate) as System.Windows.Forms.DataGridView;
            gw1.DataSource = dt;
        }

        //find element in visual tree
        private childItem FindVisualChild<childitem>(DependencyObject obj) where childItem : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                if (child != null && child is childItem)
                    return (childItem)child;
                else
                {
                    childItem childOfChild = FindVisualChild<childitem>(child);
                    if (childOfChild != null)
                        return childOfChild;
                }
            }
            return null;
        }

        private void gridView_SelectionChanged(object sender, EventArgs e)
        {
            this.ContentTemplate = FindResource("ThisTemplate") as DataTemplate;
            ChildTemplate = FindResource("ThisTemplate") as DataTemplate;
            ParentTemplate = FindVisualChild<contentpresenter>(This);
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            this.ContentTemplate = FindResource("ThisTemplate") as DataTemplate;
        }

        private void button1_ClickT1(object sender, RoutedEventArgs e)
        {
            this.ContentTemplate = FindResource("SecondTemplate") as DataTemplate;
        }
    }
} 
</contentpresenter></childitem></childitem>

The code still doesn't make sense to me...

All you show is templates - no actual visual elements.

Why can't you just add a Loaded event handler to the WindowsFormsHost and
set the DataGridView's DataSource in that handler?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Thank you very much for advice. That works very well now.
I´m beginner in WPF so I didn´t know about that Loaded event handler in WindowsFormsHost.

But when I set DataTemplate as ContentTemplate (this.ContentTemplate = FindResource("PresentationTemplate") as DataTemplate; ), that elements in DataTemplate can be considered as visual elements or can´t?

Czechtim2 wrote:
I didn´t know about that Loaded event handler in WindowsFormsHost.

Any class derived from FrameworkElement has the Loaded event.
FrameworkElement is derived from UIElement, so you get all the
UIElement properties and events as well Smile | :)

Czechtim2 wrote:
when I set DataTemplate as ContentTemplate (this.ContentTemplate = FindResource("PresentationTemplate") as DataTemplate; ), that elements in DataTemplate can be considered as visual elements or can´t?

Yes. Once you've actually created instances of the elements described by the
template, well... then you have actual instances. Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

OK thank you very much

Hi,

i want to change the colors of a menustrip(VS2008).
i changed the backgroundcolor and the textcolor with the designer.
the background is black and the text is grey.
it looks nice but if i hover over the menu, the submenu pops up and the style looks like the standard style.
How can i change the colors of the menuitems too ?

bye jo

Here's an example of applying a style to MenuItems...

WPF XAML MenuItem Styles[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Whenever I try to run the WPF application I am getting the following error:

Cannot create instance of 'Window1' defined in assembly 'C1WPFGrid, Version=1.0.0.0,

Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an

invocation. Error in markup file 'Window1.xaml' Line 1 Position 9.

Am I leaving out any declarations ? Please advise ! Confused | :confused:

Best Wishes ....... ARIJIT

This normally means that there's a bit of a binding problem going on here. Take a look in the Output window to see if anything's causing a problem - also, set a breakpoint on the InitializeComponent method.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Arijit Manna wrote:
Error in markup file 'Window1.xaml' Line 1 Position 9.

I'm curious....what does line 1 of 'Window1.xaml' look like? Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

The delrations in XAML are like theis :

<Window x:Class="Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="CIWPFGrid" Height="346" Width="628" xmlns:c1grid="http://schemas.componentone.com/wpf/C1DataGrid" WindowState="Maximized">

Best Wishes ....... ARIJIT

In addition to Pete's suggestions, I would try removing elements from the
window and adding them in one at a time until it breaks. XAML makes that
an easy process.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Hello,

I am trying to convert some vector based objects into a raster bitmap.
I manage to do that, but the result is blurry, meaning, edges are blurry instead of jagged.
I assume an anti-aliasing algorithm is applied, but I do not want to be applied...

here is my simplified code in which I draw a circle and make a raster out of it to an Image Control:

DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawEllipse(Brushes.Red, new Pen(Brushes.Red, 1), new Point(50, 50), 50, 50);
drawingContext.Close();

RenderTargetBitmap bmp = new RenderTargetBitmap(180, 180, 96, 96, PixelFormats.Pbgra32);
bmp.Render(drawingVisual);

_image.Source = bmp;

Here is an image to make it clearer.
What I want is the jagged edged circle...
Sample Image[^]

Does anyone have any idea why this happens???
Thanks!

Hi guys.
I wanna use a WinApp control in WPF ( Like Vista Clock[^] )
But I don't know how I can do it.

Any ideas will be appreciating .

use
<windowsformshost>
Place that control in this place..
</windowsformshost>

try this...

modified on Thursday, December 11, 2008 6:42 AM

Thanks , I've got the answer here too http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/0957ca2b-946b-44f9-8bbd-dfe5be666d30/[^]

Hi.
How can we get position of Mouse Cursor on Desktop in WPF and C# ?

Thank you.

Listen to the MouseMove event.

Jammer
My Blog | Article(s)