CODEWITHSUNDEEP
wpfdata-bindingdependency-properties
Yaakov Ellis
Yaakov Ellis

Reputation: 41530

Set WPF Label Content based on Value of bool Dependency Property

I have a label in a WPF user control:

<Label Name="lblTitle"></Label>

In the code behind, I define a dependency property called Customer. Customer itself has a property called IsNew. I would like to bind lblTitle.Content so that when IsNew == true then it would be "Create New", and when it is false then the Content would be set to "Update" (I would do this in ASP.net by setting lblTitle.Text = IsNew ? "Create New" : "Update";).

What is the best way to do this?

Edit

Here is my declaration of the property in the code behind:

public Cust Customer{
    get { return (Cust)GetValue(CustomerProperty); }
    set { SetValue(CustomerProperty, value); }
}

public static readonly DependencyProperty CustomerProperty =
    DependencyProperty.Register("Customer", typeof(Cust), typeof(Name_Of_Control), new UIPropertyMetadata(new Cust()));

Upvotes: 3

Views: 4015

Answers (3)

KennyPowers
KennyPowers

Reputation: 5015

This should help you

<Label Name="lblTitle">
    <Label.Style>    
        <Style TargetType="{x:Type Label}">
            <Setter Property="Label.Content" Value="Update" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding Customer.IsNew}" Value="True">
                    <Setter Property="Label.Content" Value="Create New" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Label.Style>
</Label>

Also, if you want to apply a style from your resources, you can use BasedOn attribute:

<Style BasedOn="{StaticResource MyLabelStyleName}" TargetType="{x:Type Label}">

With that you'll be able to set a new content value based on Customer.IsNew property as well as a style for your Label control.

Upvotes: 4

Tomislav Markovski
Tomislav Markovski

Reputation: 12356

Try this.

<Label Name="lblTitle">
    <Label.Style TargetType="Label">
        <Setter Property="Content" Value="Update" />
        <Style.Triggers>
            <DataTrigger Binding="{Binding Customer.IsNew}" Value="True">
                <Setter Property="Content" Value="Create New" />
            </DataTrigger>
        </Style.Triggers>
    </Label.Style>
</Label>

Upvotes: 0

user1119167
user1119167

Reputation: 52

One other thing worth noting is that if your label is simply displaying text then you are better of using a TextBlock rather than a label:

http://joshsmithonwpf.wordpress.com/2007/07/04/differences-between-label-and-textblock/

Upvotes: -3

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