如何在绑定中将TargetNullValue设置为folderpath？

Question

<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，我需要将文本框与 TargetNullValue 中提到的默认文件夹路径绑定。但就我而言，它像这样 C：myfolder1mysubfolder1

我该如何绑定文本框，例如 C：\ myfolder1 \ mysubfolder1 ？

Answer 1

我不知道是什么原因，但是添加另一个'\'似乎可行：

<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}" />