CODEWITHSUNDEEP
c#wpfwpf-controls
Robert
Robert

Reputation: 666

WPF DataTrigger Binding not working

I have a search box which i am trying to to check if it is empty by using the "hasdata" and if empty return false else return true, but the DataTrigger Binding is not working. can someone point me in the right direction on what i am doing wrong.

code:

public bool hasdata
{
    get { if (searchBox.Text.Count() == 0) return false; else return true; }
}

xaml:

<telerik:RadWatermarkTextBox x:Name="searchBox"/>
<Image Source="SomeImage.png" >
    <Image.Style>
        <Style TargetType="{x:Type Image}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Path=hasdata}" Value="True">
                    <Setter Property="Visibility" Value="Visible"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding Path=hasdata}" Value="False">
                    <Setter Property="Visibility" Value="Hidden"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Image.Style>
</Image>

Upvotes: 1

Views: 3170

Answers (1)

Arian Motamedi
Arian Motamedi

Reputation: 7423

The UI has currently no way of being notified when hasdata is changed. You need to either implement the INotifyPropertyChanged interface or make hasdata a DependencyProperty.

Upvotes: 4

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