向数据绑定下拉列表中添加另一项。

Posted 2021-02-27

Stupidly simple, but I keep forgetting it.

private void PopulateLookupData()
    {
        Lookup.SuburbDataTable subs = DALLookup.GetSuburbs();
        dropSuburb.DataSource = subs;
        dropSuburb.DataTextField = subs.SuburbColumn.ColumnName;
        dropSuburb.DataValueField = subs.SuburbIdColumn.ColumnName;
        dropSuburb.DataBind(); 
        dropSuburb.Items.Insert(0, new ListItem("Select a Suburb.")); 
    }