利用FileUpload来检查文件的MD5 CheckSum

利用FileUpload来检查文件的MD5 CheckSum

这个范例主要是用来检查文件的MD5 CheckSum
透过CheckSum值可以来判断文件是否被修改过

Md5checksum.aspx

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Md5checksum.aspx.cs

01 using ...System;
02 using System.Data;
03 using System.Configuration;
04 using System.Collections;
05 using System.Web;
06 using System.Web.Security;
07 using System.Web.UI;
08 using System.Web.UI.WebControls;
09 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11 using System.Security.Cryptography;
12 using System.Text;
13 using System.IO;
14
15 public partial class Md5checksum : System.Web.UI.Page
16 ...{
17     protected void Page_Load(object sender, EventArgs e)
18     ...{
19
20     }
21
22     protected string MD5checksum(byte[] buffer)
23     ...{
24         MD5 md5 = MD5.Create();
25         StringBuilder sb = new StringBuilder();
26
27         foreach (byte b in md5.ComputeHash(buffer))
28         ...{
29             sb.Append(b.ToString("x2").ToLower());
30         }
31
32         return string.Format("MD5 checksum:
...{0}", sb.ToString());
33
34     }
35     protected void Button1_Click(object sender, EventArgs e)
36     ...{
37         if (this.FileUpload1.HasFile)
38         ...{
39             this.Label1.Text = MD5checksum(this.FileUpload1.FileBytes);
40         }
41     }
42 }
43

原文:大专栏  利用FileUpload来检查文件的MD5 CheckSum

来源：https://www.cnblogs.com/chinatrump/p/11516264.html