C# 调用带有输出参数的分页存储过程

一、创建带有输出参数的分页存储过程

 use StudentMISDB
 go
 select * from Course
 alter table Course
     add IsDelete int not null default 0
 go
 select * from Course where IsDelete=1

 --update Course  set IsDelete=0

 ---循环 添加数据
 --declare @index int
 --set @index =0
 --while(@index<2)
 --begin
 --    insert into Course select Name,ByName,IsDelete from Course
 --    set @index=@index+1;
 --end

 --分页 显示 第 11 到20条的数据

 select * from(select ROW_NUMBER() over(order by courseId)as rowNUM, * from Course
 where IsDelete=0)as temp
 where rowNUM>=11 and rowNUM<=20

 select count(1)as rowRount  from Course where IsDelete=0 

                 --pageIndex 从 0 开始
                 --pageSize  每页显示的数据条数【10 条】
                 --((pageIndex) *pageSize)+1      (pageIndex * pageSize)+pageSize
                 --11                           20

                 --总页数 pageCount = 总的记录/pageSize
 ---分页的 要素:1.当前 页码   pageIndex
             --2. 每一页的 容量 pageSize
             --3. 总条数   count
             --4. 总页数   pageCount=count/pageSize

 --创建分页的存储过程
 create proc Proc_GetPageData
     @pageIndex int,
     @pageSize int,
     @rowCount int out,
     @pageCount int out
 as
     begin
     select * from(select ROW_NUMBER() over(order by courseId)as rowNUM, * from Course where IsDelete=0)as temp
                 where rowNUM>(@pageIndex*@pageSize) and rowNUM<= (@pageIndex*@pageSize+@pageSize)

     select  @rowCount =count(1) from Course where IsDelete=0
     set @pageCount=@rowCount/@pageSize
     end
 go

 declare @pageIndex int,
     @pageSize int,
     @rowCount int,
     @pageCount int

 --select @pageIndex=3,@pageSize=10
 exec Proc_GetPageData @pageIndex,@pageSize,@rowCount out,@pageCount out
 --select @rowCount,@pageCount

 select * from Students
 go

二、在C#中对存储过程进行调用，并且进行参数化和断开式连接查询，并利用DataGridView插件将结果显示在窗体中.

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using System.Data.SqlClient;

 namespace  Demo01
 {
     public partial class UseSaveProcess : Form
     {
         public UseSaveProcess()
         {
             InitializeComponent();
         }

         private void Form1_Load(object sender, EventArgs e)
         {
             //数据库连接字符
             string connstring = "server=.;database=StudentMISDB;uid=sa;pwd=123456";
             //连接数据库
             SqlConnection conn = new SqlConnection(connstring);
             //调用存储过程
             string sql = "Proc_GetPageData";
             //定义参数
             SqlParameter[] parameter = new SqlParameter[] {
                 new SqlParameter("@pageIndex",SqlDbType.Int),
                 new SqlParameter("@pageSize",SqlDbType.Int),
                 new SqlParameter("@rowCount",SqlDbType.Int),
                 new SqlParameter("@pageCount",SqlDbType.Int)
             };
             //给参数赋值
             parameter[].Value = ;
             parameter[].Value = ;
             //标明输出参数
             parameter[].Direction = ParameterDirection.Output;
             parameter[].Direction = ParameterDirection.Output;
             //执行命令
             SqlCommand cmd = new SqlCommand(sql,conn);
             //声明SQL语句是存储过程
             cmd.CommandType = CommandType.StoredProcedure;
             //添加参数
             cmd.Parameters.AddRange(parameter);
             //断开式连接查询
             SqlDataAdapter adapter = new SqlDataAdapter(cmd);
             //建立数据集（缓冲区）
             DataSet ds = new DataSet();
             conn.Open();
             adapter.Fill(ds);
             conn.Close();
             //绑定数据源
             this.dataGridView1.DataSource = ds.Tables[];
             //显示在下方的lable中
             int rowcount = Convert.ToInt32(parameter[].Value);
             int pagecoun = Convert.ToInt32(parameter[].Value);
             this.label1.Text = "总共有" +rowcount+"条数据，共有" +pagecoun+"页";
         }
     }
 }