Focus Restoring in Busy Indicator

[Hareesh]

Hi,
I have an issue with busy indicator & textbox focus. I have tried the fix from http://www.telerik.com/help/silverlight/radbusyindicator-how-to-restore-the-focus.html. This throws an error while running the application. Please help..
Error is:
System.Windows.Markup.XamlParseException occurred
  LineNumber=38
  LinePosition=193
  Message=Set property 'Controls.Helper.EnsureFocus' threw an exception. [Line: 38 Position: 193]
  StackTrace:
       at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
       at Iatric.SAM.Shell.Login.InitializeComponent()
       at Iatric.SAM.Shell.Login..ctor()
  InnerException: System.ArgumentException
       Message=Object of type 'System.Windows.Data.Binding' cannot be converted to type 'System.Boolean'.
       StackTrace:
            at System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast)
            at System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr)
            at System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, 


CultureInfo culture, Signature sig)
            at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] 


parameters, CultureInfo culture, Boolean skipVisibilityChecks)
            at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] 


parameters, CultureInfo culture)
            at MS.Internal.XamlMemberInfo.SetValue(Object target, Object value)
            at MS.Internal.XamlManagedRuntimeRPInvokes.SetValue(XamlTypeToken inType, XamlQualifiedObject& inObj, 


XamlPropertyToken inProperty, XamlQualifiedObject& inValue)
       InnerException: 


My Helper Class:
Public Class Helper
        Private Shared Sub OnEnsureFocusChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
            If Not CBool(e.NewValue) Then
                TryCast(d, Control).Focus()
            End If
        End Sub


        Public Shared Function GetEnsureFocus(ByVal obj As DependencyObject) As Boolean
            Return CBool(obj.GetValue(EnsureFocusProperty))
        End Function


        Public Shared Sub SetEnsureFocus(ByVal obj As DependencyObject, ByVal value As Boolean)
            obj.SetValue(EnsureFocusProperty, value)
        End Sub


        Public Shared ReadOnly EnsureFocusProperty As DependencyProperty = DependencyProperty.RegisterAttached("EnsureFocus", GetType(Boolean), GetType(Helper), New PropertyMetadata(Nothing, AddressOf OnEnsureFocusChanged))
    End Class

[Ivo]

Hi Hareesh,

I would suggest you when creating the new PropertyMetadata for the EnsureFocus DependencyProperty to use the constructor with only one parameter, instead of two. This should solve your issue.

Public Shared ReadOnly EnsureFocusProperty As DependencyProperty = DependencyProperty.RegisterAttached("EnsureFocus", GetType(Boolean), GetType(Helper), New PropertyMetadata(AddressOf OnEnsureFocusChanged))

Regards,
Ivo
the Telerik team

[Hareesh]

Thank you Ivo!!
This solved my focus issue!!

Regards,
Hareesh