[Solved] Google-Like filtering Radcombobox ItemsRequested is triggering RadGrid needDataSource event.

[Morgan]

Hello,

I have implemented the Google-like filtering that is demonstrated here.

The problem is that the itemsRequested events of the RadComboBoxes are triggering the RadGrid.NeedDataSource event. 

I usually use the following logic to prevent rebinding the RadGrid :

Protected Sub RadGrid1_NeedDataSource(ByVal source As Object, ByVal e As Telerik.WebControls.GridNeedDataSourceEventArgs) Handles RadGrid1.NeedDataSource
        If Not RadComboBox1.IsCallBack Then
            ' rebind radgrid
        End If
End Sub

I would like to do something similar in this case, but I do not know how to get a reference to the RadComboBoxes.

Thanks

[Shinu]

Hi Morgan,

Go through the following help article and see how the Filtering Item is being accessed in the code behind.

Setting filter textbox dimensions/changing default filter image

Thanks
Shinu.

[Morgan]

Thanks for your reply Shinu.

Turns out that the itemsRequested event of the radComboBoxes trigger the page_load event. I need to avoid the execution of code inside the page_load event.

How can I get a reference to the radcomboboxes from inside the Page_load event so I can check RadComboBox.IsCallBack?

Thanks again

[Vladimir]

Hi Morgan,

Please check this thread for more info on how to use alternative technique to find if the combo is requesting the server:

http://www.telerik.com/community/forums/thread/b311D-dcadm.aspx

[Morgan]

Thanks Vlad!!  That did the trick. 

Here is my solution for other peoples benefit :

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not IsPostBack AndAlso Not isRadComboCallBack() Then
       ' Do stuff
    End If
End Sub

Private Function isRadComboCallBack() As Boolean
    Return Not IsNothing(Request("rcbID"))
End Function