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protected void Page_Load(object sender, EventArgs e)
{

//加密算法
string username = "我是陳建勇";
//MD5加密 - 得到32位加密數(shù)據(jù),數(shù)據(jù)不好解密。過于復(fù)雜。
username =FormsAuthentication.HashPasswordForStoringInConfigFile(username, "MD5");

//SHA1加密 - 得到40位加密數(shù)據(jù),數(shù)據(jù)不好解密。過于復(fù)雜。
string username1 = FormsAuthentication.HashPasswordForStoringInConfigFile(username, "SHA1");

Response.Write(username+"<br>");

Response.Write(username1+"<br>");

//解密算法

//普通加密
string s = "我是陳建勇";

string encodestr = "";

byte[] bytes = System.Text.Encoding.GetEncoding(0).GetBytes(s);

try
{
encodestr = Convert.ToBase64String(bytes);
Response.Write("aa");
}
catch
{
encodestr = s;
Response.Write("bb");
}
Response.Write(encodestr+"<br>");

//普通解密
string decodestr = "";
byte[] bytes1 = Convert.FromBase64String(encodestr);
try
{
decodestr = System.Text.Encoding.GetEncoding(0).GetString(bytes1);
Response.Write("cc");
}
catch
{
Response.Write("dd");
decodestr = encodestr;
}
Response.Write(decodestr+"<br>");

//普通加密
string myname = "陳建勇";

myname = System.Web.HttpUtility.UrlEncode(myname, System.Text.Encoding.UTF8);

Response.Write(myname+"<br>");

//普通解密
myname = System.Web.HttpUtility.UrlDecode(myname, System.Text.Encoding.UTF8);

Response.Write(myname);
}