<TextBox Grid.Column="2" Height="25" IsReadOnly="True" TextAlignment="Right" Text="{Binding ElementName=Mygroups, TargetNullValue= 'C:\myfolder1\mysubfolder1',Path=DataContext.FoldernameWithPath,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" />
<Button Grid.Column="3" Grid.Row="1" Content="Browse" Height="25" VerticalAlignment="Bottom" MinWidth="47" Command="{Binding ElementName=Mygroups,Path=DataContext.OpenFolderCommand}" CommandParameter="{Binding}" />
在用户单击浏览按钮之前,我需要将Textbox与 TargetNullValue 中提到的默认文件夹路径绑定。但在我的情况下,它像这样绑定C:myfolder1mysubfolder1
我应该怎么做才能绑定像C:\myfolder1\mysubfolder1这样的文本框?