CSharp SQLServer 登陆

=======后台SQLServer存储过程================

--创建数据库
create database Stu;

--创建表
use MyShool;
if exists(select * from sys.tables where name='student')
    drop table student;
go
create table Student(
stuId int identity(1,1) primary key,
stuName varchar(50) null,
stuPwd  varchar(50) null,
stuAge int null,
);
--插入数值
Insert into student(stuName,stuPwd,stuAge) values('张三',123,10);
Insert into student(stuName,stuPwd,stuAge) values('王五',123,20);
Insert into student(stuName,stuPwd,stuAge) values('李四',123,30);
Insert into student(stuName,stuPwd,stuAge) values('赵六',123,40);
commit;
--查询数据
select * from student;

--创建存储过程

create procedure [dbo].[proLogin](
@i_name varchar(50),
@i_pwd varchar(50),
@o_re  varchar(50) output)  --返回信息
as
declare @co int;          --查到总行数变量
begin
--   set @co=( select count(*) from student
--    where stuName=@i_name and stuPwd=@i_pwd);
    select @co=count(*) from student
    where stuName=@i_name and stuPwd=@i_pwd;

if @co = 1
      begin
        set @o_re='用户'+@i_name+'登陆成功!';
        return 11;
      end;
    else
      begin
        set @o_re='用户'+@i_name+'登陆失败!';
        return 22;
      end;
end;

--测试存储过程
declare
@return_value int,
@o_re  varchar(50)
exec @return_value=proLogin
     @i_name = N'张三',
     @i_pwd = N'123',
     @o_re = @o_re OUTPUT
select @o_re,@return_value

=======前台程序代码======================

1、在Web.config配置登陆信息
  <connectionStrings>
    <add name="字符串名称" connectionString="server=服务器地址;database=数据库名称;uid=登陆名;pwd=密码;"/>
  </connectionStrings>

2、前台Login.aspx

3、后台代码Login.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

namespace WebApplication1
{
    public partial class Login : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

}
        protected void btnLogin_Click(object sender, EventArgs e)
        {
            //用户名和密码可以从外部输入
            string name = txtName.Text.Trim(); ;
            string pwd = txtPwd.Text.Trim();

string strConn = System.Configuration.ConfigurationManager.ConnectionStrings["LinkSqlServer1"].ToString();
            SqlConnection conn = new SqlConnection(strConn);
            conn.Close();

SqlCommand cmd = new SqlCommand("proLogin", conn);
            cmd.CommandType = CommandType.StoredProcedure;

//参数
            SqlParameter pName = new SqlParameter("@i_name", SqlDbType.VarChar, 50);
            pName.Value = name;
            pName.Direction = ParameterDirection.Input;
            SqlParameter pPwd = new SqlParameter("@i_pwd", SqlDbType.VarChar, 50);
            pPwd.Value = pwd;
            pPwd.Direction = ParameterDirection.Input;
            //输出
            SqlParameter pRe = new SqlParameter("@o_re", SqlDbType.VarChar, 50);
            pRe.Direction = ParameterDirection.Output;

cmd.Parameters.Add(pName);
            cmd.Parameters.Add(pPwd);
            cmd.Parameters.Add(pRe);

conn.Open();
            cmd.ExecuteNonQuery();
            ScriptManager.RegisterStartupScript(this.btnLogin, btnLogin.GetType(),
                "re", "alert('" + pRe.Value.ToString() + "');", true);
            conn.Close();
        }
    }
}