Why do I have to click Edit twice on the DetailsView?

If you need to click a DetailsView Edit button twice before it goes into Edit mode, you are probably not handling its ModeChanging event properly.

A little background: You can add an Edit button to the DetailsView by setting its AutoGenerateEditButton property to true. You must also handle the DetailsView ModeChanging event as follows:

protected void mmDetailsView1_ModeChanging(object sender, DetailsViewModeEventArgs e)

    {

        if (e.NewMode == DetailsViewMode.Edit)

        {

            mmDetailsView1.ChangeMode(DetailsViewMode.Edit);

            this.Order.GetOrdersByOrderID(10248);

        }

    }

Notice that after changing the mode to Edit, the DetailsView control is re-bound.