趴

 protected void Button1_Click(object sender, EventArgs e)
    {

       //把TextBox1的值轉成MD5

        string mm = MD5code(TextBox1.Text); 

        //TextBox2 顯示轉出來的MD5的值

        TextBox2.Text = mm;
    }

private String MD5code(String str) //MD5處理
        {
            System.Security.Cryptography.MD5CryptoServiceProvider md5Hasher=new            System.Security.Cryptography.MD5CryptoServiceProvider();
            Byte[] data = md5Hasher.ComputeHash((new System.Text.ASCIIEncoding()).GetBytes(str));
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();   
            for (int i=0 ;i< data.Length; i++){
                sBuilder.Append(data[i].ToString("x2"));
            }     
            return sBuilder.ToString() ;
        }

//部份程式碼取自網路