<i: Interaction.Behavior> option is not coming for applying beahviour

wpf xaml mvvm blend attachedbehaviors
Yogesh picture Yogesh · Sep 13, 2013 · Viewed 16.3k times · Source

I have been trying to implement a behavior on a wpf window therefore I have added reference to System.Winodws.Interactivity in my current solution and then wrote the desired behavior. but in order to apply this behavior, I have to write something like this in Windows XAML.

<Window x:Class="WpfApplication5.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        Title="MainWindow" Height="350" Width="525" 
        xmlns:behav ="clr-namespace:WpfApplication5" 
        xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity;assembly=System.Windows.Interactivity">
    <Window.Resources>
        <i:Interaction.Behaviors>
            <behav:DialogIconRemoveBehavior></behav:DialogIconRemoveBehavior>
        </i:Interaction.Behaviors>
    </Window.Resources>
    <Grid>

    </Grid>
</Window>

but this is not valid tag because I might have to add reference to any other assembly apart form System.Windows.Interactivity, So, please suggest what else I have to do in order to use tag in XAML

Answer

Yogesh picture Yogesh · Sep 13, 2013

After wasting my one hour I came to know that only I had to include System.Windows.Interactivity as reference and which I had already done.

the issue was that Behaviors can not be declared in the Resource part of any control.

the moment I took the following

<i:Interaction.Behaviors>

</i:Interaction.Behaviors>

out of the resources then it worked fine.

So, conclusion only System.Windows.Interacivity is the only required.

Never declare that behavior part in the resources or style.

Related questions

Handling the window closing event with WPF / MVVM Light Toolkit

I'd like to handle the Closing event (when a user clicks the upper right 'X' button) of my window in order to eventually display a confirm message or/and cancel the closing. I know how to do this in the …

Read More
How do I set a ViewModel on a window in XAML using DataContext property?

The question pretty much says it all. I have a window, and have tried to set the DataContext using the full namespace to the ViewModel, but I seem to be doing something wrong. <Window x:Class="BuildAssistantUI.BuildAssistantWindow" xmlns="…

Read More
WPF MVVM: How to close a window

I have a Button that closes my window when it's clicked: <Button x:Name="buttonOk" IsCancel="True">Ok</Button> That's fine until I add a Command to the Button i.e. <Button x:Name="buttonOk" …

Read More