Hello,

I would like to ask about DataError event once more (we discussed it a little in some previous thread). I have tested behavior and program crashes in case of parsing error. First, if I do some validation in underlying data object and throw exception in object property setter, GridView handles it corectly and fires DataError event. But in case of parsing error, for example when I have textbox column, integer property and enter some non-numeric text, program crashes with unhandled exception:

I know, I should use GridViewDecimalColumn, but generally, why GridView doesn't handle parsing error and doesn't fire DataError event also in this case? I have attached also the test project, TelerikTestDataError in solution.

Unhandled exception:
System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at System.String.System.IConvertible.ToInt32(IFormatProvider provider)
   at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
   at System.ComponentModel.BaseNumberConverter.ConvertTo(ITypeDescriptorContext context, CultureInfo culture, Object value, Type destinationType)
   at Telerik.WinControls.UI.RadDataConverter.ParseCore(Object value, Type targetType, Type sourceType, TypeConverter dataTypeConverter, IDataConversionInfoProvider dataColumn, Boolean checkFormattedNullValue, CultureInfo cultureInfo)
   at Telerik.WinControls.UI.RadDataConverter.Parse(IDataConversionInfoProvider converstionInfoProvider, Object value, CultureInfo cultureInfo)
   at Telerik.WinControls.UI.GridDataCellElement.set_Value(Object value)
   at Telerik.WinControls.UI.GridViewEditManager.EndEditCore(Boolean validate, Boolean cancel)
   at Telerik.WinControls.UI.GridViewEditManager.EndEdit()
   at Telerik.WinControls.UI.GridRowBehavior.ProcessEnterKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.GridRowBehavior.ProcessKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridBehavior.ProcessKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridBehavior.ProcessKeyDown(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridEditor.OnKeyDown(KeyEventArgs keyEventArgs)
   at Telerik.WinControls.UI.RadTextBoxEditor.OnKeyDown(KeyEventArgs e)
   at Telerik.WinControls.UI.RadTextBoxEditor.TextBoxItem_KeyDown(Object sender, KeyEventArgs e)
   at System.Windows.Forms.KeyEventHandler.Invoke(Object sender, KeyEventArgs e)
   at Telerik.WinControls.RadItem.OnKeyDown(KeyEventArgs e)
   at Telerik.WinControls.UI.RadTextBoxItem.TextBoxControl_KeyDown(Object sender, KeyEventArgs e)
   at System.Windows.Forms.Control.OnKeyDown(KeyEventArgs e)
   at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
   at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
   at System.Windows.Forms.Control.WmKeyChar(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.TextBoxBase.WndProc(Message& m)
   at System.Windows.Forms.TextBox.WndProc(Message& m)
   at Telerik.WinControls.UI.HostedTextBoxBase.WndProc(Message& message)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

I have created a custom PropertyGridItemElement for my RadPropertyGrid to hold a button.  When the user clicks the button, the click handler performs some action, but the action is based on data that is known by the form that contains the propertygrid that contains the custom element.  How do I arrange for that data to be available to the button's Click handler?  The constructor of the custom element isn't even called explicitly -- it's implicit in 

PropertyGrid.CreateItemElement += (sender, args) =>
{
    if (args.Item.Name == nameof(LabelWrapper.Button))
    {
        args.ItemElementType = typeof(CustomPropertyGridItemElement);
    }
};

Thanks in advance.

Using RadCalendar and I thought is would be simple

I want all dates in the past to be disabled and I thought this would do it:

        private void radCalendar1_ElementRender(object sender, RenderElementEventArgs e)

        {
            if (e.Day.Date < DateTime.Now)
                e.Day.Disabled = true;
        }

Th goals is to have it look like this but it seems to have no effect and I can selected dates that the code set as disabled.

What am I missing?

Thanks

Carl

Hellow!

How can i change the following properties in the object "RadGanttView" (check image for color usage)

• Height (RED)
• Width (BLUE)

Hi!

When endUpdate occurs in gridview, the scroll moves to the begin.

In my environment I have to beginUpdate and Endupdate.

But 1 dont' want the scroll to move even if the data is Updated(endupdate timing)!

Please tell me how to prevent the scroll from moving automatically when editing mode is released by double-clicking or when endupdate occurs.

The method of updating the scroll value after endupdate by storing the scroll value before beginupdate failed.

A gif Image and simple project are attached. Please help me!!!

Thank you :)

Hello Team

How to set horizontal scroll position left most in the RadTreeView ?

Note: telerik version 2024.1.312.48

Attached screenshot for reference:

Thanks

Rajkannan