有滚动条、固定Header的ASP.Net DataGrid实现

客户要一个有滚动条的ASP.Net DataGrid控件，只好写了：
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Web.UI.Design.WebControls;
using System.Text;
using System.Drawing;

[assembly:TagPrefix("Microsoft.Gtec.Dsv", "gtecdsv")]
namespace Microsoft.Gtec.Dsv
{
/// <summary>
/// Summary description for WebCustomControl1.
/// </summary>
[ToolboxData("<{0}:ScrollableFixedHeaderDataGrid runat=server></{0}:ScrollableFixedHeaderDataGrid>")]
public class ScrollableFixedHeaderDataGrid: System.Web.UI.WebControls.DataGrid
{
protected override void Render(HtmlTextWriter output)
{
//Use this flag to determine whether the component is in design-time or runtime.
//The control will be rendered differently in IDE.
//Don't bother to use DataGridDesigner.GetDesignTimeHtml
bool designMode = ((Site != null) && (Site.DesignMode));
//Backing up the properties need to change during the render process
string tempLeft = Style["LEFT"];
string tempTop = Style["TOP"];
Unit tempHeight = Height;
string tempTableStyle = Style["TABLE-LAYOUT"];

//Render a "<div>" container with scrollbars.
output.WriteBeginTag("div");
output.WriteAttribute("id",ID + "_div");
output.WriteAttribute("style",
"HEIGHT: " + Height + ";" +
//Leave 20px for the vertical scroll bar,
//assuming the end-user will not set his scroll bar to more than 20px.
"WIDTH: " + (Width.Value + 20) + "px;" +
"TOP: " + Style["TOP"] + ";" +

补充：asp教程,数据库相关