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Szymon
1715
Binding to AllowEdit property of the Field Settings
posted

We are trying to develop a grid whose AllowEdit property for field settigs depends on some runtime values. It seems that almost any kind of binding fails. We have tried:

AllowEdit="{Binding ElementName=parentUserControlName, Path=IsEditAllowed} "

and 

AllowEdit="{Binding IsEditAllowed}" after setting the User Control's DataContext to "this". 

Both times we get the error:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=IsEditAllowed; DataItem=null; target element is 'FieldSettings' (HashCode=15935451); target property is 'AllowEdit' (type 'Nullable`1')

 

However, if we set the Binding Source to be an x:Static, it works. For example:

AllowEdit="{Binding Path=IsEditAllowed, Source={x:Static  Sample:EntitlementsProvider.Instance}}" it works fine!!!

I know that FieldSettings is just a DependencyObject, not a framework element, but if anyone could explain why this is happening and what workarounds we can do to dynamically set the AllowEdit property in a consistent and extensible manner, please let me know.

Thanks,

-Szymon

 

Parents
  • 180
    posted

    I am having the same problem. I have a UserControl that hosts a XamDataGrid. I have a dependency property IsEditable that can be set on the UserControl. Based on the value of this property, I want to set AllowEdit to true or false. I have tried the following and I get the same error as mentioned above. Does anyone have a solution for this?

    <igDP:FieldSettings CellWidth="25" LabelWidth="25"

    AllowEdit="{Binding ElementName=ROTabGridUserControl,Path=IsEditable}"

    EditorType="{x:Type igEditors:XamNumericEditor}"

    EditorStyle="{StaticResource PercentageEditorStyle}"

    CellValuePresenterStyle="{StaticResource WhiteBackgroundPresenter}"

    />

    </igDP:UnboundField.Settings>

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