CODEWITHSUNDEEP
c#wpfgroupboxmultibinding
ck84vi
ck84vi

Reputation: 1586

WPF Group Box Multibinding in Header

I would like to implement a multi binding for the header of my group box.

This is my current approach:

        <GroupBox>
            <GroupBox.Header>
                <TextBlock>
                    <TextBlock.Text>
                        <MultiBinding StringFormat="{}My Custom Header - {0}">
                            <Binding Path="VM.Obj1.Obj2.PropertyName"/>
                        </MultiBinding>
                    </TextBlock.Text>
                </TextBlock>
            </GroupBox.Header>
        </GroupBox>

If I implement it in this way, the header of my group box shows System.Windows.Controls.TextBlock

What is the correct way to use multi binding for the header of my group box so that the Text Block uses multi binding and binds to my strig property "PropertyName"? So the result shall be:

My Custom Header - StringValueOfPropertyName

Upvotes: 0

Views: 905

Answers (1)

GazTheDestroyer
GazTheDestroyer

Reputation: 21261

You don't need a multibinding when there's only one binding:

<GroupBox>
    <GroupBox.Header>
        <TextBlock Text="{Binding VM.Obj1.Obj2.PropertyName, StringFormat=My Custom Header - {0}}"/>
    </GroupBox.Header>
</GroupBox>

In fact GroupBoxHeader allows string format directly using HeaderStringFormat:

<GroupBox Header="{Binding VM.Obj1.Obj2.PropertyName}"
          HeaderStringFormat="My Custom Header - {0}" />

Upvotes: 3

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