一个管理员登录的数据访问类（新手作品）

最新推荐文章于 2025-05-16 14:05:15 发布

nowave2004

最新推荐文章于 2025-05-16 14:05:15 发布

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文章标签： string dataset user table insert login

本文链接：https://blog.youkuaiyun.com/nowave2004/article/details/1475209

本文介绍了一个用户管理系统的设计与实现过程，包括用户登录验证、密码加密处理、用户类型判断及新增用户的逻辑。通过使用C#语言结合SQL Server数据库，实现了用户信息的存储与检索功能。

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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.Data.SqlClient;
using System.Web.Services;

/// <summary>
/// admin 的摘要说明
/// </summary>
public class admin
{
public admin()
{

  // TODO: 在此处添加构造函数逻辑
  //
}
    private string getpwd(string name)
    {
        string pwd="0";
        SqlDataReader myreader = sqlreader();
        while (myreader.Read())
        {
            string username = myreader.GetString(1);
            if (username == name)
            {
                pwd = myreader.GetString(2);
                break;
            }
        }

        return pwd;
    }
    public int gettype(string name)
    {
        int usertype=0;
        SqlDataReader myreader = sqlreader();
        while (myreader.Read())
        {
            string username = myreader.GetString(1);
            if (username == name)
            {
                 usertype = myreader.GetInt32(3);
                break;
            }
        }

        return usertype;
    }
    public DataTable getadmintable()
    {
        SqlConnection mycons = mycon();
        SqlDataAdapter adpt = new SqlDataAdapter("select * from LD_USER",mycons);
        mycons.Open();
        DataSet ds =new DataSet();
        adpt.Fill(ds, "user");
       DataTable table1;
       table1 = ds.Tables["user"];
       return table1;
    }
    private SqlDataReader sqlreader()
    {
        SqlConnection myconsws = new SqlConnection();

            myconsws = mycon();
        myconsws.Open();
        SqlCommand mycmd = new SqlCommand("select * from LD_USER", myconsws);
        SqlDataReader reader;
       reader= mycmd.ExecuteReader();
       return reader;

    }
   public int login( string name,string pwd)
    {
        string pwdtrue;
        pwd = md51(pwd);
        pwdtrue = getpwd(name);
        DataTable admintable = getadmintable();
        if (pwdtrue != "0")
        {
            if (pwdtrue == pwd)
            {
                return gettype(name);
            }
            else
                return 0;
        }
        else
            return 0;

    }
public SqlConnection mycon()
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings[1].ConnectionString.ToString());
        return conn;
    }
    public string md51(string tostrings)
    {
        return FormsAuthentication.HashPasswordForStoringInConfigFile(tostrings, "MD5");
    }
    public bool adduser(string name,string pwd,int type)
    {

       // DataTable tablead = getadmintable();
        //for(int i=0;;i++)
        //{
//if(tablead.Rows[i]["user_name"]==name)
      //   {
       //      return false;
       // }
      // }
           SqlDataReader myreader = sqlreader();
        while(myreader.Read())
        {

            string mynamne;
            mynamne=myreader.GetString(1);
            if (name == mynamne)
            {
                return false;
            }

        }
        string insertpwd=md51(pwd);

        SqlConnection mycons = mycon();
        mycons.Open();

        SqlCommand mycmd = new SqlCommand("insert_admin", mycons);
        mycmd.CommandType = CommandType.StoredProcedure;

        SqlParameter parametername = new SqlParameter("@User_Name_2 ", SqlDbType.VarChar, 50);
        parametername.Value = name;
        mycmd.Parameters.Add(parametername);
        SqlParameter parameterpwd = new SqlParameter("@User_Pwd_3 ", SqlDbType.VarChar, 50);
        parameterpwd.Value = insertpwd;
        mycmd.Parameters.Add(parameterpwd);
        SqlParameter parametertype = new SqlParameter("@User_Type_4 ", SqlDbType.Int);
        parametertype.Value = type;
        mycmd.Parameters.Add(parametertype);
        mycmd.ExecuteNonQuery();
        mycons.Close();

return true;
}
}