[URL重写][转贴]如何在URL重写后，form标记中的Action值也用虚拟地址？

我们可以通过自定义页面基类，重写默认的HtmlTextWriter方法，重写属性输出WriteAttribute(string name, string value, bool encode)方法，当输出action时，将action属性的值强制转换为当前虚URL(HttpContext.Current.Request.RawUrl，上面的1000.aspx)

最后就是让所有的页面都调用这个基类，修改一下Web.config就好了
<!-- Openlab.Controls.OLPage为页面基类，Openlab.Controls为基类所在dll -->
<pages pageBaseType="Openlab.Controls.OLPage, Openlab.Controls"/>

附页面基类完整代码（参考CS代码完成）：

using System;
using System.IO;
using System.Web;
using System.Web.UI;
namespace Openlab.Controls
{
/// 页面基类
/// </summary>
    public class OLPage : Page
{
public OLPage()
{
        }
///  重写默认的HtmlTextWriter方法，修改form标记中的value属性，使其值为重写的URL而不是真实URL。
/// </summary>
/// <param name="writer"></param>
        protected override void Render(HtmlTextWriter writer)
{
if (writer is System.Web.UI.Html32TextWriter)
{
                writer = new FormFixerHtml32TextWriter(writer.InnerWriter);
            }
else
{
                writer = new FormFixerHtmlTextWriter(writer.InnerWriter);
            }
base.Render(writer);
        }
#endregion
    }
internal class FormFixerHtml32TextWriter : System.Web.UI.Html32TextWriter
{
private string _url; // 假的URL

internal FormFixerHtml32TextWriter(TextWriter writer):base(writer)
{
            _url = HttpContext.Current.Request.RawUrl;
        }
public override void WriteAttribute(string name, string value, bool encode)
{
// 如果当前输出的属性为form标记的action属性，则将其值替换为重写后的虚假URL
            if (_url != null && string.Compare(name, "action", true) == 0)
{
                value = _url;
            }
base.WriteAttribute(name, value, encode);
        }
    }
#endregion
internal class FormFixerHtmlTextWriter : System.Web.UI.HtmlTextWriter
{
private string _url;
internal FormFixerHtmlTextWriter(TextWriter writer):base(writer)
{
            _url = HttpContext.Current.Request.RawUrl;
        }
public override void WriteAttribute(string name, string value, bool encode)
{
if (_url != null && string.Compare(name, "action", true) == 0)
{
                value = _url;
            }
base.WriteAttribute(name, value, encode);
        }
    }
#endregion
#endregion
}