[Solved] Grid expand/collapse button image

[S V]

I'm having trouble changing the expand/collapse button image in a grid. My goal is that I would like to keep the EnableEmbeddedBaseStylesheet ja EnableEmbeddedSkins false and set only the styles I need for the grid. This works fine and as expected, it also gets rid of the original styles of the button. The problem is that I can't find a place where to set the imageurl for the button.

I have tried several different solutions:

Inside mastertableview:
<ExpandCollapseColumn ButtonType="LinkButton"  CollapseImageUrl="myfirsturl" ExpandImageUrl="mysecondurl" />

In Prerender:
dim column = TryCast(mygrid.MasterTableView.GetColumn("ExpandColumn"), GridExpandColumn)
column.ButtonType = GridExpandColumnType.ImageButton
column.ExpandImageUrl = mysecondurl
column.CollapseImageUrl = myfirsturl

In ColumnCreated:
If TypeOf e.Column Is GridExpandColumn Then
            Dim column = TryCast(e.Column, GridExpandColumn)
            column.ButtonType = GridExpandColumnType.ImageButton
            column.ExpandImageUrl = mysecondurl
            column.CollapseImageUrl = myfirsturl
End If

Nothing works. I have a feeling that I'm trying to set it 1) int the wrong sub (even though many examples use solutions above) 2) to the wrong element. So how can I change it?

[Schlurk]

You could try the OnInit() function:

    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        RadGrid1.MasterTableView.ExpandCollapseColumn.ButtonType = Telerik.Web.UI.GridExpandColumnType.ImageButton;
    }

As found in this community post

[S V]

Hi! And thanks for the reply. Unfortunately that is not working for me.. Where should I set the images to the button? On oninit or on the grid somewhere?