It gives an example of specifying 'TargetNullValue':
<TextBox Width="150"
Text="{Binding Source={StaticResource object2},
Path=PropertyB, BindingGroupName=bindingGroup,
TargetNullValue=please enter a string}" />
My question is how can I specify an empty string for TargetNullValue?
I have tried "TargetNullValue= }" (there is a space between = and }, but that does not work, the target null value is null, instead of an empty string.
Thank you.
You can use x:Static in the xaml and define the string.empty there.
<TextBox Width="150"
Text="{Binding Source={StaticResource object2},
Path=PropertyB, BindingGroupName=bindingGroup,
TargetNullValue={x:Static system:String.Empty} }" />
You'll need to add the appropriate namespace to the xaml as needed. VS should do this for you though. Namespace required is
xmlns:system="clr-namespace:System;assembly=mscorlib"
I don't know why the answer saying to use '' is deleted, but it works fine for me:
<TextBox Text="{Binding NumberOfCats, TargetNullValue=''}" />