当前文件： UrlReWriter/UrlRewriter/URLRewriter.Form.cs[2K，2009-6-12 11:57:50]，打开代码结构图

		            
 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Web;
 5using System.Web.Security;
 6using System.Web.UI;
 7using System.Web.UI.WebControls;
 8using System.Web.UI.WebControls.WebParts;
 9using System.Web.UI.HtmlControls;
10
11/**//// <summary>
12/// FormRewriter 的摘要说明
13/// </summary>
14namespace URLRewriter.Form
15...{
16    public class FormRewriterControlAdapter : System.Web.UI.Adapters.ControlAdapter
17    ...{
18        public FormRewriterControlAdapter()
19        ...{
20        }
21
22        protected override void Render(HtmlTextWriter writer)
23        ...{
24            base.Render(new RewriteFormHtmlTextWriter(writer));
25        }
26    }
27
28    public class RewriteFormHtmlTextWriter : HtmlTextWriter
29    ...{
30        public RewriteFormHtmlTextWriter(HtmlTextWriter writer)
31            : base(writer)
32        ...{
33            base.InnerWriter = writer.InnerWriter;
34        }
35        public RewriteFormHtmlTextWriter(System.IO.TextWriter writer)
36            : base(writer)
37        ...{
38            base.InnerWriter = writer;
39        }
40
41        public override void WriteAttribute(string name, string value, bool fEncode)
42        ...{
43            //If the attribute we are writing is the "action" attribute, and we are not on a sub-control, 
44            //then replace the value to write with the raw URL of the request - which ensures that we'll
45            //preserve the PathInfo value on postback scenarios
46            if (name == "action")
47            ...{
48                HttpContext context = HttpContext.Current;
49                if (context.Items["ActionAlreadyWritten"] == null)
50                ...{
51                    //We will use the Request.RawUrl property within ASP.NET to retrieve the origional 
52                    //URL before it was re-written.
53                    value = context.Request.RawUrl;
54                    //Indicate that we've already rewritten the <form>'s action attribute to prevent
55                    //us from rewriting a sub-control under the <form> control
56                    context.Items["ActionAlreadyWritten"] = true;
57                }
58            }
59            base.WriteAttribute(name, value, fEncode);
60        }
61    }
62
63}