In attempting to make use of this control there are a number of series issues with it.

Firstly, when attempting to add ranges to the range collection via the properties in visual studio 2017, this doesn't work.

What happens is the ranges you add are created in the Designer.cs of the form you are working on, but are not associated with the TrackBar you created them from.  (see attachment 1.) If you click the ranges collection again after adding one of the ranges, it naturally shows up empty. So currently the only way to add ranges is to do so programmatically. 
Secondly, performance issues, setting the maximum of of the trackbar to 1000+ and it becomes unreasonably slow, and unresponsive.

Thirdly, Assigning a value that exceeds ranges of the minimum or maximum, results in a popup message stating "The Value should be between minimum and maximum" no exception is thrown. (this looks like it was supposed to be a design time response) 

Setting a range to the start and end points to the minimum and maximum values of the trackbar, often results in one of the thumbs not being visible on the screen after loading. (see second attachment) 

I've seen elsewhere on the forum that the suggested performance fix was to apply basically scaling to the trackbar to reduce the number of elements that it needs to render, but when using the control to say track the position of media in seconds, scaling doesn't really work. 

Hi,

The mouse up, double click and, mouse down events do not fire inside the radmaskededit box control. They only fire when clicking on the edge of the control. The events work fine for the regular masked edit box.

Please advise.

Regards

Mohammed

Hi,

I was having trouble putting together a proof of concept with your RadGridView. I have a sample solution .zip file but it won't let me attach it. How can I send that to you so you can easily see what I'm talking about? I am using BindingList but the grid does not auto-refresh the data. Basically, if you change the name of ESPN to ESPN2, I would like that to update everywhere ESPN is used without calling Refresh() on the GridViewTemplates. If you edit ESPN to ESPN2, then click the Refresh button and put a breakpoint, you can evaluate and see that the name has been changed everywhere in the underlying objects but the grid doesn't automatically update. I hope this is a simple fix. Thanks!

How can i validate Dialog For only show image files on open dialog window.

While Click on GridViewBrowseColumn button only image file extention is visible. 

Hi,

I'm using a RadGridView with ViewDefinitions and I'm getting an error when the Windows have the size of the text at 125%.

The error happen only at this line: Grid.ViewDefinition = MyViewInfo.ViewDefinition

Where my MyViewInfo is a local class:

    Private Class MyViewDefinitionInfo
        Public Columns As List(Of String)
        Public ViewDefinition As IGridViewDefinition
        Public RowHeight As Integer = 30
        Public HeaderHeight As Integer = 30
    End Class

All the Column and Grid format is done inside of a Class, so I pass the Grid and DataTable as parameter

During my tests, I came to conclusion that this error only happens when the Grid is on RadForm, so on a normal Windows Form the error doesn't happen.

Part of the error is bellow, the full details is attached.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.GridTableElement.DpiScaleChanged(SizeF scaleFactor)
   at Telerik.WinControls.RadElement.SetParent(RadElement parent)
   at Telerik.WinControls.RadElement.ChangeCollection(RadElement child, ItemsChangeOperation changeOperation)
   at Telerik.WinControls.RadElementCollection.OnInsertComplete(Int32 index, Object value)

(...)

Full error attached

Hi,

I am using RadRadioButtonColumn as describe in http://www.telerik.com/support/kb/winforms/details/creating-a-radradiobuttoncellelement

but while adding new row in grid ,radio button is not  render and also focus is not comming on that cell/column.

radio button only visible after rowleave event.

Please guide further to resolve this.

Hi,

 I need to change the tooltip TEXT showed in my RadChartView serie but I have no idea of how to do this.

Could anyone help?

Thank you.