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 int CheckUser()
    {
          SqlConnection sqlconn = new SqlConnection("server=(local);uid=sa;pwd=;database=db_08");
        int intCount = 0;
        if (txtLoginName.Text == "")
        {
            Response.Write("<script language='javascript'>alert('会员登录名不能为空！');</script>");
            return intCount = 2;
        }
        else
        {
            string sqlstr = "select * from tb_03 where Name='" + this.txtLoginName.Text + "'";
            sqlconn.Open();
            SqlCommand sqlcom = new SqlCommand(sqlstr, sqlconn);
            intCount = Convert.ToInt32(sqlcom.ExecuteScalar());
            sqlconn.Close();
        }
        return intCount;
    }
    //检测用户名
    protected void btnTest_Click(object sender, EventArgs e)
    {
        
        int intCount = CheckUser();//调用方法检测用户名是否存在
        if (intCount == 2)
        { return; }
        if (intCount != 0)
        {
            Response.Write("<script language='javascript'>alert('该会员已经注册过');</script>");
            return;
        }
        else
        {
            Response.Write("<script language='javascript'>alert('您可以进行正常注册');</script>");
        }
       
    }
    //加密字符串
    //加密字符串
    public string Encrypting(string strSource)
    {
        try
        {
            //把字符串放到byte数组中
            byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
            //建立加密对象的密钥和偏移量对TripleDES，采取24字节或192位的密钥和初始向量
            byte[] key ={ 53, 68, 57, 79, 159, 168, 157, 179, 201, 40, 0, 123, 210, 189, 167, 1 };
            byte[] IV ={ 5, 13, 46, 97, 69, 109, 177, 39 };
            //实例  TripleDESCryptoServiceProvider类将字符串写入流中
            RC2CryptoServiceProvider rc2 = new RC2CryptoServiceProvider();
            rc2.IV = IV;
            rc2.Key = key;
            //加密符串
            ICryptoTransform encrypto = rc2.CreateEncryptor();//实义加密转换
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
            cs.Write(bytIn, 0, bytIn.Length);
            cs.FlushFinalBlock();
            byte[] bytOut = ms.ToArray();
            return System.Convert.ToBase64String(bytOut);


        }
        catch (Exception ex)
        {
            throw new Exception("在文件加密的时候出现错误！错误提示： \n" + ex.Message);
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        int intCount = CheckUser();//调用方法检测用户名是否存在
        
        if (intCount != 0)
        {
            Response.Write("<script language='javascript'>alert('该会员已经注册过');</script>");
            return;
        }
        //调用方法将注册信息加密
        string sqlstr = "insert into tb_03 "
            + "values('" + txtLoginName.Text + "','" + ddlSex.SelectedValue
            + "','" + Encrypting(txtPwd.Text.Trim()) + "','" + txtQuePwd.Text
            + "','" + Encrypting(txtAnsPwd.Text.Trim()) + "','" + Encrypting(txtEmail.Text.Trim()) + "')";
        SqlConnection sqlconn = new SqlConnection("server=(local);uid=sa;pwd=;database=db_08");
        sqlconn.Open();
        SqlCommand sqlcom = new SqlCommand(sqlstr, sqlconn);
        sqlcom.ExecuteNonQuery();
        sqlconn.Close();
        Response.Write("<script>alert('注册成功！');</script>");
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Write("<script>window.close();</script>");
    }

}