gridview default sortexpression

Has anyone managed to extend a GridView with default sor开发者_开发问答ting? This seems pretty trivial to me but i can't get it done.

The idea is to add a property DefaultSortExpression to a Server Control that inherits GridView.

• Calling Sort() performs an additional select, we don't want that.
• Setting this.SelectArguments.SortExpression seems to get it's value set after i do so that doesn't work either. (Unless there's some magical event i didn't try yet).

I want to be able to set the SortExpression before the GridView does it's databinding.

protected override DataSourceSelectArguments CreateDataSourceSelectArguments()
        {
            DataSourceSelectArguments dsa = base.CreateDataSourceSelectArguments();

            // dsa.SortExpression = "my field";

           return dsa;
}