RadGrid: hide add new and refresh buttons from code behind

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
if (e.Item is GridCommandItem)
{
GridCommandItem cmditm = (GridCommandItem)e.Item;
//to hide AddNewRecord button
cmditm.FindControl("InitInsertButton").Visible = false;//hide the text
cmditm.FindControl("AddNewRecordButton").Visible = false;//hide the image

//to hide Refresh button
cmditm.FindControl("RefreshButton").Visible = false;//hide the text
cmditm.FindControl("RebindGridButton").Visible = false;//hide the image


}
}