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>");
        }
        else
        {
            string sqlstr = "select * from tb_user where MemberName='" + 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 != 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
    public string Encrypting(string strSource)
    {
        //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
        //使得输入密码必须输入英文文本
        byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
        byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
        //实例DES加密类
        DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
        mobjCryptoService.Key = iv;
        mobjCryptoService.IV = key;
        mobjCryptoService.Mode = CipherMode.CBC;
        ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
        //实例MemoryStream流加密密文件
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
        cs.Write(bytIn, 0, bytIn.Length);
        cs.FlushFinalBlock();
        return System.Convert.ToBase64String(ms.ToArray());
    }
    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;
        }
        string sqlstr = "insert into tb_user "
            + "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>");
    }

}