WPF Commanding is a new way to wire-up UI events. This post will demonstrate how this works by using a TextBox and a standard Edit menu.
Let’s start with a skeleton application:
<Grid x:Name="grid1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="22" />
<RowDefinition />
</Grid.RowDefinitions>
<Menu Grid.Column="0" Grid.Row="0" VerticalAlignment="Top">
<MenuItem Header="_Edit">
<!-- Menu items will go here-->
</MenuItem>
</Menu>
<TextBox x:Name="txtDocument" Grid.Column="0" Grid.Row="1" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" AcceptsReturn="True" AcceptsTab="True" Margin="0,-0.723,0,0.723" />
</Grid>
Here’s the magic, the menu items only require a single attribute called Command. Their text, shortcut keys and function are ALL determined by this attribute. The commands below are all handled, automatically by the TextBox:
<MenuItem Command="Undo" /> <MenuItem Command="Redo" /> <Separator/> <MenuItem Command="Cut" /> <MenuItem Command="Copy" /> <MenuItem Command="Paste" /> <Separator/> <MenuItem Command="SelectAll" />
That’s all you need. No coding required! Richard Griffin has an excellent blog post on the subject here.
Further information can be found on MSDN:
Commanding Overview
