WPF: CellEditingTemplate how can I set focus on the inner control by double click or on click
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13-11-2019 - |
문제
I wrote a usercontrol of DataGrid with CellEditingTemplate. The DataTemplate of this editing-Template is a TextBox, and the cursor will go into the textbox by three times click, what can i do, if i want set the cursor on the textbox by double click or one click?
Here is my code:
<Window x:Class="MultiLineEditDataGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MultiLineEditDataGrid"
Title="MainWindow" Height="350" Width="525">
<Grid DataContext="{Binding Source={x:Static Application.Current}, Path=CompanyManager}">
<Grid.RowDefinitions>
<RowDefinition Height="270"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<DataGrid ItemsSource="{Binding Companies}" CanUserAddRows="False" AutoGenerateColumns="False">
<DataGrid.Resources>
<DataTemplate x:Key="cellTemplate">
<TextBlock Text="{Binding Description}"/>
</DataTemplate>
<DataTemplate x:Key="cellEditingTemplate">
<local:MultiLineTextBox Text="{Binding Description}"/>
</DataTemplate>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Header="Company" Binding="{Binding Name}"/>
<DataGridTemplateColumn Header="Description"
CellTemplate="{StaticResource cellTemplate}"
CellEditingTemplate="{StaticResource cellEditingTemplate}"/>
</DataGrid.Columns>
</DataGrid>
<Button Grid.Row="1" Content="Add" Command="{Binding AddCommand}"/>
</Grid>
MultiLineTextBox is the TextBox which i inherit from textbox, and override OnKeyDown method.
MultiLineTextBox's code:
public class MultiLineTextBox : TextBox
{
/// <summary>
/// On Key Down.
/// </summary>
/// <param name="e"></param>
protected override void OnKeyDown ( KeyEventArgs e )
{
base.OnKeyDown ( e );
string oldText = Text;
ModifierKeys keys = Keyboard.Modifiers;
if ( e.Key == Key.Enter )
{
if ( ( Keyboard.Modifiers & ModifierKeys.Control ).Equals ( ModifierKeys.Control ) )
{
int index = SelectionStart;
oldText = oldText.Insert ( index, Environment.NewLine );
Text = oldText;
Select ( index + 1, 0 );
e.Handled = true;
}
else
{
e.Handled = false;
}
}
else if ( e.Key == Key.Escape )
{
Text = oldText;
e.Handled = false;
}
}
}
해결책
I find a way to resolve this problem, and here is my code.
<Window x:Class="MultiLineEditDataGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MultiLineEditDataGrid"
Title="MainWindow" Height="350" Width="525">
<Grid DataContext="{Binding Source={x:Static Application.Current}, Path=CompanyManager}">
<Grid.RowDefinitions>
<RowDefinition Height="270"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<DataGrid ItemsSource="{Binding Companies}" CanUserAddRows="False" AutoGenerateColumns="False">
<DataGrid.Resources>
<DataTemplate x:Key="cellTemplate">
<TextBlock Text="{Binding Description}"/>
</DataTemplate>
<DataTemplate x:Key="cellEditingTemplate">
<local:MultiLineTextBox x:Name="multiLineTxt" Text="{Binding Description}"/>
<DataTemplate.Triggers>
<Trigger SourceName="multiLineTxt" Property="IsVisible" Value="True">
<Setter TargetName="multiLineTxt" Property="FocusManager.FocusedElement" Value="{Binding ElementName=multiLineTxt}"/>
</Trigger>
</DataTemplate.Triggers>
</DataTemplate>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Header="Company" Binding="{Binding Name}"/>
<DataGridTemplateColumn Header="Description"
CellTemplate="{StaticResource cellTemplate}"
CellEditingTemplate="{StaticResource cellEditingTemplate}"/>
</DataGrid.Columns>
</DataGrid>
<Button Grid.Row="1" Content="Add" Command="{Binding AddCommand}"/>
</Grid>
다른 팁
I don't know why but the previous answer didn't work in my case. I found and alternative solution here http://madcoderspeak.blogspot.ca/2010/04/set-keyboard-focus-when-user-begins.html
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<StackPanel>
<TextBox x:Name="editCommentTextBox" Text="{Binding Comment, Mode=TwoWay}"
FocusManager.FocusedElement="{Binding RelativeSource={RelativeSource Self}}">
</TextBox>
<Label Content="{Binding Text, ElementName=editCommentTextBox, Converter={StaticResource CharCounterConverter}}"/>
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
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