/// <summary>
/// 用md5加密
/// </summary>
/// <param name="Sourcein">输入的数据</param>
/// <returns></returns>
public static string MD5(string Sourcein)
{
MD5CryptoServiceProvider MD5CSP = new MD5CryptoServiceProvider();
byte[] MD5Source = System.Text.Encoding.UTF8.GetBytes(Sourcein);
byte[] MD5Out = MD5CSP.ComputeHash(MD5Source);
return Convert.ToBase64String(MD5Out);
}
以上只是适用于.net的MD5加密，但是现在很多公司处于asp转asp.net的阶段，为了不改动原来的教大的用户数据库，我们需要找到一种跟asp的md5加密后相同的结果，下面的代码是我曾经用过的，给出来大家参考：黄色部分代码
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace WindowsApplication2
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Label label3;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(200, 96);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "加密";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(88, 24);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(120, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(88, 64);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(312, 21);
this.textBox2.TabIndex = 2;
this.textBox2.Text = "";
//
// label1
//
this.label1.Location = new System.Drawing.Point(48, 32);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(32, 16);
this.label1.TabIndex = 3;
this.label1.Text = "密码";
//
// label2
//
this.label2.Location = new System.Drawing.Point(16, 64);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(64, 16);
this.label2.TabIndex = 4;
this.label2.Text = "md5加密后";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(280, 24);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(120, 21);
this.textBox3.TabIndex = 5;
this.textBox3.Text = "";
//
// label3
//
this.label3.Location = new System.Drawing.Point(216, 32);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(48, 16);
this.label3.TabIndex = 6;
this.label3.Text = "偏移量";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(416, 133);
this.Controls.Add(this.label3);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
/// <summary>
///
/// </summary>
/// <param name="sDataIn">需要加密的字符串</param>
/// <param name="move">偏移量</param>
/// <returns>sDataIn加密后的字符串</returns>
public string GetMD5(string sDataIn,string move)
{
System.Security.Cryptography.MD5CryptoServiceProvider md5=new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[]bytValue,bytHash;
bytValue = System.Text.Encoding.UTF8.GetBytes(move+sDataIn);
bytHash = md5.ComputeHash(bytValue);
md5.Clear();
string sTemp="";
for(int i=0;i<bytHash.Length;i++)
{
sTemp+=bytHash[i].ToString("x").PadLeft(2,'0');
}
return sTemp;
}
private void Form1_Load(object sender, System.EventArgs e)
{
}
private void button1_Click(object sender, System.EventArgs e)
{
this.textBox2.Text = GetMD5(this.textBox1.Text,this.textBox3.Text);
}
}
}
