zoukankan      html  css  js  c++  java
  • 投票系统前台 C#,数据库SQL

    ------------vote.aspx.cs--------------------
      private void Page_Load(object sender, System.EventArgs e)   {    // 在此处放置用户代码以初始化页面    if(!Page.IsPostBack)    {     SqlConnection con=db.createrConnection();     con.Open();     SqlCommand cmd=new SqlCommand("select votetitle from votemaster where voteid="+this.idd,con);     string title=Convert.ToString(cmd.ExecuteScalar());     this.title.Text=title;     cmd.CommandText="select * from vote where voteid="+this.idd;     SqlDataReader sdr=cmd.ExecuteReader();     this.rad.DataSource=sdr;     this.rad.DataTextField="voteitem";     this.rad.DataValueField="id";     this.rad.DataBind();     sdr.Close();     con.Close();    }   } 窗体代码 private void tp_Click(object sender, System.EventArgs e)   {   SqlConnection con=db.createrConnection();   con.Open();   SqlCommand cmd=new SqlCommand();   cmd.Connection=con;   cmd.CommandText="update vote set votenun=votenun+1 where voteid="+this.idd+" and id="+this.rad.SelectedValue.ToString();   cmd.ExecuteNonQuery();  con.Close();    

      }

      private void show_Click(object sender, System.EventArgs e)   {    Response.Redirect("show.aspx?voteid="+this.idd);   }  } } ---------------------完----------vote.aspx -----------------
     

    Label
     
     

    ------------------------------完-----------db.cs-----------------------

       // TODO: 在此处添加构造函数逻辑
       //
      }
      public static SqlConnection createrConnection()
      {
     SqlConnection con=new SqlConnection("server=.;database=vote;uid=sa;pwd=980123");
      return con;
      }
     }
    }
    ------------------------show.aspx.cs--------------------------
    private void Page_Load(object sender, System.EventArgs e)
      {
       string id=Request.QueryString["voteid"].ToString();
       SqlConnection con=db.createrConnection();
       con.Open();
       SqlCommand cmd=new SqlCommand("select * from vote where voteid="+id,con);
       SqlDataReader sdr=cmd.ExecuteReader();
       while (sdr.Read())
      {
      Response.Write(sdr.GetString(2)+"--"+sdr.GetInt32(3).ToString());
      }
    ---------------------完-------------sql文件------------------

    create database vote

     

    use vote

    create table votemaster ( voteid int primary key,--投票编号 votetitle varchar(100) not null,--投票标题 votesum int default 0 --投票的总票数 )

    insert into votemaster values(1,'书记选举',0) insert into votemaster values(2,'市长选举',0)

    select * from votemaster

    create table vote (  voteid int foreign key references votemaster(voteid),--该键是主表的联系键  id int not null,  voteitem varchar(20) not null,  votenun int default 0, )

    insert into vote values(1,1,'张三',0) insert into vote values(1,2,'李达',0) insert into vote values(1,3,'钟馗',0) insert into vote values(1,4,'江尚',0) insert into vote values(2,1,'刘文采',0) insert into vote values(2,2,'李世民',0) insert into vote values(2,3,'周正',0) insert into vote values(2,4,'张三疯',0)

    select * from vote where voteid=2

    create trigger updatemaster--这里是触发器 on vote for update as begin   update votemaster set votesum=votesum+1 where voteid=(select top 1 voteid from inserted) end

    update vote set votenun=votenun+1 where voteid=2 and id=2
    ------------------------------完--------------------

  • 相关阅读:
    ios 工具大全,最全框架
    获取APP的启动图 -Launch Image
    OCP-052考试题库汇总(3)-CUUG内部解答版
    OCP-052考题汇总(2)-CUUG内部解答版
    OCP-052考题汇总(1)-CUUG内部解答版
    【第60题】【062题库】2019年OCP认证062考试新题
    【第59题】【062题库】2019年OCP认证062考试新题
    【第58题】【062题库】2019年OCP认证062考试新题
    【第57题】【062题库】2019年OCP认证062考试新题
    【第56题】【062题库】2019年OCP认证062考试新题
  • 原文地址:https://www.cnblogs.com/ai394495243/p/3200483.html
Copyright © 2011-2022 走看看