下拉框的绑定

绑定事件的演示:   

SqlDataAdapter adapter = new SqlDataAdapter(sql, myConnection);
        DataSet ds = new DataSet();
        adapter.Fill(ds);

 this.droplist.DataSource = ds.Tables[0];
        this.droplist.DataTextField = "IncName"; //显示的值
        this.droplist.DataValueField = "IncID";//后台的值
        this.DataBind();//绑定