Find Control Value on RadGrid ItemCommand

protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)

{

if (e.CommandName == "some_command")

{

GridEditFormItem editform = (GridEditFormItem)((Telerik.Web.UI.GridDataItem)(e.Item)).EditFormItem;

TextBox txtbx = (TextBox)editform.FindControl("MyTextbox");

string strtxt = txtbx.Text;

}

}