Cannot get MultiBinding to work

Question

I have the following code in my test project:

    <StackPanel>
        <TextBlock Height="50" Text="{Binding First}" />
        <TextBlock Height="50" Text="{Binding Last}" />
        <TextBlock Height="50" >
            <TextBlock.Text>
                <MultiBinding StringFormat="{}{0} + {1}}">
                    <Binding Path="First" />
                    <Binding Path="Last" />
                </MultiBinding>
            </TextBlock.Text>
        </TextBlock>
    </StackPanel>

First and Last are string properties:

    public string First { get; set; }
    public string Last { get; set; }

    public MainWindowViewModel()
    {
        First = "First";
        Last = "Last";
    }

The first two TextBlocks with the single binding work as expected, but the one with the Multibinding doesn't. If possible, I want to avoid using a converter What's wrong with my code?

Might be helpful: https://stackoverflow.com/questions/2552853/how-to-bind-multiple-values-to-a-single-wpf-textblock — Prasad Telkikar, Jun 28 '18 at 07:03

score 1 · Accepted Answer · answered Jun 28 '18 at 07:04

1

MultiBinding works from NET .NET 3.5 SP1

And you got the typo, remove last bracket "}" in String-Format

 <TextBlock.Text>
     <MultiBinding StringFormat="{}{0} + {1}">
         <Binding Path="First" />
         <Binding Path="Last" />
     </MultiBinding>
  </TextBlock.Text>

Please let know if solution works for you

answered Jun 28 '18 at 07:04

Kaspar

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4
13

Thanks, the typo was indeed the problem. When I open a bracket in the XAML editor, it "helpfully" appends a closing bracket automatically, but unlike the C# editor, it doesn't skip over that closing bracket when I immediately write another closing bracket... – Hackworth Jun 28 '18 at 07:09

Cannot get MultiBinding to work

1 Answers1