<telerik:RadPieChart> <telerik:PieSeries ItemsSource="{Binding AssetsData}" /></telerik:RadPieChart>private ElementCollection<PieDataPoint> assetsData;public ElementCollection<PieDataPoint> AssetsData { get { return assetsData; } set { assetsData = value; Notify("AssetsData"); } }PieSeries series = new PieSeries();series.RadiusFactor = 0.9; foreach (var entry in dataSource){ series.DataPoints.Add(new PieDataPoint() { Value = entry.Percentage, Label = entry.Title });} assetsData = series.DataPoints;
I am trying to add Telerik’s controls (like RadMaskedTextBox, RadNumericTextBox and RadDateInput controls) dynamically into a user control (under the Page_Init event) which is itself a child of another user control.
When I run the project, following exception occurred and nothing is shown in the user control.
“Microsoft JScript runtime error: Sys.ArgumentException: Value must not be null for Controls and Behaviors. Parameter name: element”
However, these controls are added directly on a .aspx page without any exception and it appeared that the Telerik’s controls get registered in the Page_PreRenderComplete event of an .aspx page and since this event does not exist in a user control therefore they are throwing the above exception.
Thanks & Regard's

hi,
i m using silverlight and telerik radgrid....now i m validationg a certail cell......i m using mandatory validation for the cell..
i m using rowvalidating and cellvalidating events......
Problem is that, on displaying the error message (i m using red border for indicating the mandatory field missing message).......
the
focus retains on that cell only...it doesnt move to any other part of
the page...neither mouse works nor the keyboard.....please help guys...
i m also playing with the e.IsValid, ActionOnLostFocus properties........but i guess i m missing the right order...
need the help urgently.....
if possible please provide sample codes (well arranged and to the point)
thanks in advance.....