wpf datagrid bug? when toggle visibility on a column with an image as headercontent
i have the following problem.
if i use an image for a datagrid header i get an error while toggling visibility.
<DataGridTextColumn Header="{StaticResource Image_Link}" IsReadOnly="True">
Error: Bei dem angegebenen Element handelt es sich bereits um das logische untergeordnete Element eines anderen Elements.
the only workaround i found so far is to create a ControlTemplate with the specific image foreach of my imageheadercolumns.
is this datagrid behav开发者_开发知识库iour a bug?
EDIT: Error translated by google: The specified element is already the logical child of another element.
EDIT: Sample
<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="350" Width="525">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Dictionary1.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid>
<Button Content="Toggle" Click="Button_Click" Height="20" Width="40" HorizontalAlignment="Left"/>
<DataGrid Width="200">
<DataGrid.Columns>
<DataGridTextColumn x:Name="colImage" Header="{StaticResource AnyImage}">
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
ResourceDictionary:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Image x:Key="AnyImage" Source="Home.png" x:Shared="false"/>
</ResourceDictionary>
Button.Click:
private void Button_Click(object sender, RoutedEventArgs e)
{
this.colImage.Visibility = this.colImage.Visibility == Visibility.Visible
? Visibility.Collapsed
: Visibility.Visible;
}
**EDIT: Deleted the previous answer which wasn't relevant**
You will need to put the image in headertemplate of column.
working sample code
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<BitmapImage x:Key="Image_Link" UriSource="test.bmp" />
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button Content="Button" Name="button1" Width="75" Click="button1_Click" />
<Grid Grid.Row="1">
<DataGrid Height="200" VerticalAlignment="Top">
<DataGrid.Columns>
<DataGridTextColumn x:Name="firstHeader" IsReadOnly="True">
<DataGridTextColumn.HeaderTemplate>
<DataTemplate>
<Image Source="{StaticResource Image_Link}" />
</DataTemplate>
</DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Grid>
</Window>
private void button1_Click(object sender, RoutedEventArgs e)
{
firstHeader.Visibility = firstHeader.Visibility == Visibility.Visible ? Visibility.Collapsed : Visibility.Visible;
}
I'm not sure what's causing this, but you could try to explicitly create the Image
control to display the image:
<DataGridTextColumn IsReadOnly="True">
<DataGridTextColumn.Header>
<Image Source="{StaticResource Image_Link}" />
</DataGridTextColumn.Header>
</DataGridTextColumn>
精彩评论