Adding items to the HeaderContextMenu

[Thomas]

I have tried several attempts to add a item to the HeaderContextMenu. I was able to add a item utilizing this method
 

Protected Overloads Overrides Sub OnPreRenderComplete(ByVal e As EventArgs)

          

        Dim menu As RadContextMenu = rgvSchedules.HeaderContextMenu 
        Dim item As New RadMenuItem()

        item.Text = "Paste Results"

        item.PostBack = True

        menu.Items.Add(item)

        MyBase.OnPreRenderComplete(e)

    End Sub

The Postback method is because I was attempting to find a way to set a server side procedure on click. I removed the excess code from my failed attempts. There inlies the problem. I cannot for the life of me find a way to set the onclick method for the item that I added and when it is clicked I get a runtime error:

Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

[Tsvetina]

Hello Thomas,

Please, try the solution offered in this forum post. I tried it on my side and it worked as expected. Take notice of the events where the item add logic is performed.

Greetings,
Tsvetina
the Telerik team

[Thomas]

Thank you. Based on that example I was able to accomplish what I wanted to do.