CODEWITHSUNDEEP
c#xamlmvvmteleriksilverlight-5.0
shalin
shalin

Reputation: 452

MVVM command binding error

My command binding is not fire, but it worked as expected with another button.
My Xaml, 

<telerik:HierarchicalDataTemplate x:Key="TagTemplate" ItemsSource="{Binding Tags_CustmFldDetails.TagsList}" >
        <StackPanel Orientation="Horizontal">               
            <TextBlock Text="{Binding TagName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />
            <telerik:RadRibbonButton  Command="{Binding DataContext.Tags_CustmFldDetails.DeleteTags_CustmFldCommand}" CommandParameter="{Binding}" SmallImage="../Images/delete_icon.png" />
        </StackPanel>
    </telerik:HierarchicalDataTemplate>

Command for RadRibbonButton not firing,
Error is,

System.Windows.Data Error: BindingExpression path error: 'Tags_CustmFldDetails' property not found on 'ChurchHub.Server.ReqResp.DTO.PlannerTagSerializable' 'ChurchHub.Server.ReqResp.DTO.PlannerTagSerializable' (HashCode=55932620). BindingExpression: Path='Tags_CustmFldDetails.TagsList' DataItem='ChurchHub.Server.ReqResp.DTO.PlannerTagSerializable' (HashCode=55932620); target element is 'Telerik.Windows.Controls.RadTreeViewItem' (Name=''); target property is 'ItemsSource' (type 'System.Collections.IEnumerable')..

This command work perfectly in out side of this "HierarchicalDataTemplate".
Try using adding 

Command="{Binding DataContext.Tags_CustmFldDetails.DeleteTags_CustmFldCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}

But nothing happened, same error.
"Tags_CustmFldDetails" is command hosted view model.
How to solve this ?

Upvotes: 0

Views: 386

Answers (1)

shalin
shalin

Reputation: 452

Sorry... I just change Ancestor type. now its working.
In my button, 

<telerik:RadRibbonButton  Command="{Binding  RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=UserControl},Path=DataContext.Tags_CustmFldDetails.DeleteTags_CustmFldCommand}" 
                                      CommandParameter="{Binding}" 
                                      SmallImage="../Images/delete_icon.png" 
                                      />

I change relative source binding.

Upvotes: 1

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