Url重写之action改变的问题

namespace ActionlessForm {
public class Form : System.Web.UI.HtmlControls.HtmlForm
{
protected override void RenderAttributes(HtmlTextWriter writer)
{
writer.WriteAttribute("name", this.Name);
base.Attributes.Remove("name");

writer.WriteAttribute("method", this.Method);
base.Attributes.Remove("method");

this.Attributes.Render(writer);

base.Attributes.Remove("action");

if (base.ID != null)
writer.WriteAttribute("id", base.ClientID);
}
}
}

<%@ Register TagPrefix="skm" Namespace="ActionlessForm"
Assembly="ActionlessForm" %>

然后，将 <form runat="server">（如果有）替换为：

<skm:Form id="Form1" method="post" runat="server">

并将右边的 </form> 标记替换为：

</skm:Form>
---或者

using System;
using System.IO;
using System.Web;
using System.Web.UI;

namespace URl
{
/**//// <summary>
/// 页面基类
/// </summary>
public class OLPage : Page
{
public OLPage()
{
}



/**//// <summary>
/// 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);
}



}




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);
}
}



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);
}
}

}