wpf string formatting NOT numbers or dates

formatting, string, wpf

Solution

`StringFormat` will work if the target type is `string`. However, the type of `Label`'s `Content` property is object. That is why the `StringFormat` has no effect. If you put a `TextBlock` inside the `Label` (or only use a `TextBlock`) and bind the `Textblock`'s `Text` property, it should work fine.

<Label>
    <TextBlock Text="{Binding obj.field, StringFormat=\{0\} suffix}" />
</Label>

If you have other reasons to want to bind the value to the `Label`, you could also do the following.

<Label DataContext="{Binding obj.field}">
    <TextBlock Text="{Binding ., StringFormat=\{0\} suffix}" />
</Label>

Related question: I can't think of any reason why normal format strings that you can supply to `string.Format()` wouldn't work. They all should, both the standard and custom string. Here is a page with multiple examples. If there are any you find are not working, please provide examples.

Problem

This should have a simple solution, but I can't seem to find it. I want to do something like the following, where I have a data binding with a string format. The field is a text field, and I'd like to display it with a suffix (but not change the underlying data). ``` <Label Name="field" Content="{Binding obj.field, StringFormat=\{0\} suffix}" /> ``` So I want obj.field's value, for instance "value", to display as "value suffix". Is it really necessary to use a ValueConverter (or whatever) to do this? I'm thinking that if it's possible with the StringFormat construction, then there's some magic format option I just haven't encountered. This leads to a related question: where can I find a reference for WPF StringFormat? I can find the reference for the c# String.Format formatting options, but these don't all seem to work in WPF (like what I've tried above).

Original source