使用Dapper接收多个结果集,并实现存储过程分页

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http://blog.csdn.net/weijian300/article/details/50463307
本文简单介绍一下QueryMultiple的用法,并给出用QueryMultiple来实现SQL Server存储过程分页
先放一个网上找的分页过程,出自哪里不记得了,原文作者别见怪

--分页存储过程  
CREATE PROCEDURE [dbo].[Pro_System_DataPaging]
    (
      @Tables VARCHAR(1000) ,                --表名/视图名
      @PrimaryKey VARCHAR(100) ,             --主键
      @Sort VARCHAR(200) = NULL ,            --排序字段(不带order by)
      @pageindex INT = 1 ,                    --当前页码
      @PageSize INT = 10 ,                    --每页记录数
      @Fields VARCHAR(1000) = N'*' ,         --输出字段
      @Filter VARCHAR(8000) = NULL ,         --where过滤条件(不带where)
      @Group VARCHAR(1000) = NULL --,          --Group语句(不带Group By)
      --@DataCount INT OUTPUT                 --总记录数
    )
AS 
    DECLARE @SortTable VARCHAR(100) 
    DECLARE @SortName VARCHAR(100) 
    DECLARE @strSortColumn VARCHAR(200) 
    DECLARE @operator CHAR(2) 
    DECLARE @type VARCHAR(100) 
    DECLARE @prec INT 

--设定排序语句
    IF @Sort IS NULL
        OR @Sort = '' 
        SET @Sort = @PrimaryKey      
    IF CHARINDEX('DESC', @Sort) > 0 
        BEGIN         
            SET @strSortColumn = REPLACE(@Sort, 'DESC', '')         
            SET @operator = '<='     
        END 
    ELSE 
        BEGIN                
            SET @strSortColumn = REPLACE(@Sort, 'ASC', '')                
            SET @operator = '>='     
        END 
    IF CHARINDEX('.', @strSortColumn) > 0 
        BEGIN         
            SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.', @strSortColumn))
            SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.', @strSortColumn) + 1, LEN(@strSortColumn))     
        END 
    ELSE 
        BEGIN         
            SET @SortTable = @Tables         
            SET @SortName = @strSortColumn  
        END 

--设置排序字段类型和精度 
    SELECT  @type = t.name ,
            @prec = c.prec
    FROM    sysobjects o
            JOIN syscolumns c ON o.id = c.id
            JOIN systypes t ON c.xusertype = t.xusertype
    WHERE   o.name = @SortTable
            AND c.name = @SortName

    IF CHARINDEX('char', @type) > 0 
        SET @type = @type + '(' + CAST(@prec AS VARCHAR) + ')'

    DECLARE @strPageSize VARCHAR(50) 
    DECLARE @strStartRow VARCHAR(50) 
    DECLARE @strFilter VARCHAR(1000) 
    DECLARE @strSimpleFilter VARCHAR(1000) 
    DECLARE @strGroup VARCHAR(1000)  

    IF @pageindex < 1 
        SET @pageindex = 1  
    SET @strPageSize = CAST(@PageSize AS VARCHAR(50)) 
--设置开始分页记录数 
    SET @strStartRow = CAST(( ( @pageindex - 1 ) * @PageSize + 1 ) AS VARCHAR(50))  
--筛选以及分组语句
    IF @Filter IS NOT NULL
        AND @Filter != '' 
        BEGIN         
            SET @strFilter = ' WHERE ' + @Filter + ' ' 
            SET @strSimpleFilter = ' AND ' + @Filter + ' ' 
        END 
    ELSE 
        BEGIN         
            SET @strSimpleFilter = ''         
            SET @strFilter = ''     
        END 
    IF @Group IS NOT NULL
        AND @Group != '' 
        SET @strGroup = ' GROUP BY ' 
--执行查询语句    
    EXEC(
    '
    DECLARE @SortColumn ' + @type + '
    SET ROWCOUNT ' + @strStartRow + '
    SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
    SET ROWCOUNT ' + @strPageSize + '
    SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
    '
    )       

--计算总记录数,总页数
    DECLARE @DataCountSql NVARCHAR(1000)
    SET @DataCountSql = N'SELECT COUNT(' + @PrimaryKey + N') AS DataCount,CEILING(COUNT(' + @PrimaryKey + N')/' + CONVERT(VARCHAR(10),@PageSize) + '.000) AS PageCount'+ N' FROM ' + @Tables + @strFilter
    --EXEC sp_executesql @DataCountSql, N'@DataCount int', @DataCount OUTPUT
    EXEC(@DataCountSql)

表

CREATE TABLE [dbo].[TestColumn](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [NAME] [nvarchar](150) NULL,
    [ModifiedOn] [smalldatetime] NULL
    )

OK,接下来新建个控制台项目

        private const string Sqlconnection = @"Data Source=.\MSSQLSERVER2008;Initial Catalog=DapperTest;User Id=sa;Password=123456;";//连接自己改

        public static SqlConnection OpenConnection()
        {
            var connection = new SqlConnection(Sqlconnection);
            connection.Open();
            return connection;
        }

        /// 

        /// 单个结果集
        /// 
        /// 查询结果
        public static IEnumerable SelectTestColumns()
        {
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "select * from TestColumn order by id desc";
                return conn.Query(query, null);
            }
        }

        /// 

        /// 多个结果集
        /// 
        /// 分页信息
        /// 查询结果
        public static IEnumerable SelectTestColumns(out List sysPaging)
        {
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "EXEC [dbo].[Pro_System_DataPaging] @Tables = N'TestColumn',@PrimaryKey = N'ID',@Sort = N'ID',@pageindex = 1,@PageSize = 10,@Fields = '[Id],[NAME],[ModifiedOn]',@Filter = NULL,@Group = NULL";
                var result = conn.QueryMultiple(query);

                //这里一定要分别单独接收之后,再进行return
                var resultGird = result.Read().ToList();
                var paging = result.Read().ToList();
                sysPaging = paging.ToList();

                return resultGird;
            }
        }

        static void Main(string[] args)
        {
            var paging = new List();
            var allTestColumns = SelectTestColumns(out paging).ToList();

            foreach (var testColumn in allTestColumns.Where(c => c.Parentid == 0))
            {
                Console.Out.WriteLine("Id==>" + testColumn.Id + "\t");
                Console.Out.WriteLine("Name==>" + testColumn.Name + "\t");
                Console.Out.WriteLine("时间==>" + testColumn.ModifiedOn + "\t");
            }

            Console.Out.WriteLine("DataCount==>" + paging[0].DataCount);
            Console.Out.WriteLine("PageCount==>" + paging[0].PageCount);

            Console.ReadLine();
        }

其实在Dapper中也有介绍QueryMultiple的用法
官网:http://code.google.com/p/dapper-dot-net/
GitHub:https://github.com/StackExchange/dapper-dot-net