default.aspx.cs

这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Security.Cryptography;
using System.Text;
using System.Data.SqlClient;
using System.IO;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {


    }
    //检测用户名是否存在
    public void  CheckUser()
    {

          SqlConnection sqlconn = new SqlConnection("server=(local);uid=sa;pwd=;database=db_08");
            string sqlstr = "select * from tb_04 where Name='" + this.txtLoginName.Text + "'";
            sqlconn.Open();
            SqlCommand sqlcom = new SqlCommand(sqlstr, sqlconn);
            SqlDataReader dr = sqlcom.ExecuteReader();
                if (dr.Read())
                {
                    if (dr[2].ToString() == "男")
                    {
                        ddlSex.SelectedIndex = 0;
                    }
                    if (dr[2].ToString() == "女")
                    {
                        ddlSex.SelectedIndex = 1;
                    }
                    txtPwd.Text = RSADecrypt(dr[3].ToString());//调解密方法解密
                    txtQuePwd.Text = dr[4].ToString();
                    txtAnsPwd.Text = RSADecrypt(dr[5].ToString());//调解密方法解密
                    txtEmail.Text = RSADecrypt(dr[6].ToString());//调解密方法解密

                }
                else
                {

                    Response.Write("<script>alert('没有找到任何记录！');</script>");
                }
            dr.Close();
            sqlconn.Close();
          

    }
  
   //解密字符串
    public string RSADecrypt(string m_strDecryptString)
    {
        try
        {
            byte[] PlainTextBArray;
            byte[] DypherTextBArray;
            string Result;
            System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            //将公有密钥从publickey.txt中读出来加密字符串
            String path = Server.MapPath("key");//保存密钥文件夹
            //将私有密钥保存在文件
            StreamReader redKey = new StreamReader(path + "/privatekey.txt", UTF8Encoding.UTF8, true);
            rsa.FromXmlString(redKey.ReadToEnd());//初始化密钥
            redKey.Close(); ;
            //将解密字符串转化成字符节数组
            PlainTextBArray = Convert.FromBase64String(m_strDecryptString);
            //调用Decrypt（）方法解字符串
            DypherTextBArray = rsa.Decrypt(PlainTextBArray, false);
            Result = (new UnicodeEncoding()).GetString(DypherTextBArray);
            return Result;
        }
        catch (Exception ex)
        {
            throw new Exception("在解密的时候出现错误！错误提示： \n" + ex.Message);
        }
    }

    protected void Button2_Click(object sender, EventArgs e)
    {
        CheckUser();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Write("<script>window.close();</script>");
    }

}