Code1.Default.aspx
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>测试</title>
</head>
<body>
<h3>SHA1加密</h3>
<form id="Form1" runat="server">
<asp:label id="sha1_1" runat="server"></asp:label>
<asp:label id="sha1_2" runat="server"></asp:label>
<asp:textbox ID="source" runat="server" TextMode="SingleLine" Text="test" AutoPostBack="true" />
（回车）
</form>
</body>
</html>
2.Default.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
byte[] data = System.Text.Encoding.Unicode
.GetBytes(source.Text.ToCharArray());
//建立加密服务
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
//加密Byte[]数组
byte[] result = md5.ComputeHash(data);
//将加密后的数组转化为字段
string sResult = System.Text.Encoding.Unicode.GetString(result);
//显示出来
sha1_1.Text = "MD5普通加密：" + sResult.ToString() + "<br/>";
//作为密码方式加密
string EnPswdStr = System.Web.Security.FormsAuthentication.
HashPasswordForStoringInConfigFile(source.Text.ToString(), "MD5");
//显示出来
sha1_2.Text = "MD5密码加密：" + EnPswdStr + "<br/>";
}
加密密码，一行代码搞定
string EnPswdStr = FormsAuthentication.HashPasswordForStoringInConfigFile(this.txtPwd.Text.ToString(), "MD5");