C# MySql分页存储过程的应用

存储过程:

获取范围内的数据

DELIMITER $$ 

DROP PROCEDURE IF EXISTS `studb`.`GetRecordAsPage` $$

CREATE PROCEDURE `studb`.`GetRecordAsPage` (in tbName varchar(800),in fldName varchar(1000),

in strWhere varchar(500),in pageIndex int,in pageSize int,in orderType int,in sortName varchar(50))

BEGIN

declare startRow int;

declare sqlStr varchar(1000);

declare limitTemp varchar(1000);

declare orderTemp varchar(1000); 

set startRow = (pageIndex-1)*pageSize; 

set sqlStr = CONCAT('SELECT ',fldName,' from ',tbName);

set limitTemp = CONCAT(' limit ',startRow,',',pageSize);

set orderTemp = CONCAT(' order by ',sortName);

if orderType = 0 then

set orderTemp = CONCAT(orderTemp,' ASC ');

else

set orderTemp = CONCAT(orderTemp,' DESC ');

end if; 

set @sqlString = CONCAT(sqlStr,' ',strWhere,orderTemp,limitTemp); 

prepare sqlstmt from @sqlString;

execute sqlstmt;

deallocate prepare sqlstmt; 

END $$ 

DELIMITER ;

获取条件下的总记录数据

DELIMITER $$

DROP PROCEDURE IF EXISTS `GetRecordCount` $$

-- --CREATE DEFINER=`root`@`localhost` PROCEDURE `GetRecordCount`(in tbName varchar(800),in strWhere varchar(500))

CREATE  PROCEDURE `GetRecordCount`(in tbName varchar(800),in strWhere varchar(500))

BEGIN

set @strSQL=concat('select count(*) as countStr from ',tbName,strWhere);

prepare sqlstmt from @strSQL;

execute sqlstmt;

deallocate prepare sqlstmt;

END $$

DELIMITER ;

测试

建表语句

CREATE TABLE `uinfo` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'id',
`iduse` varchar(200) DEFAULT NULL COMMENT '用户编号',
`uname` varchar(200) DEFAULT NULL COMMENT '用户名称',
`email` varchar(200) DEFAULT NULL COMMENT 'Email',
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=5 DEFAULT CHARSET=latin1

测试脚本

SELECT
`id`
, `iduse`
, `uname`
, `email`
FROM
`mostimpressive_dscj`.`uinfo`;

SET @tbName='uinfo'; -- -- 表名
SET @fldName='iduse,uname,email';-- -- 表的列名
SET @strWhere = ''; -- -- 查询条件
SET @pageIndex=1;-- -- 第几页 传入1就是显示第一页
SET @pageSize=5;-- -- 一页显示几条记录
SET @orderType=0; -- --0是升序 非0是降序
SET @sortName='id'; -- -- 排序字段

CALL Dscj_GetPaged('uinfo','iduse,uname,email','',1,1,1,'id')
-- --SELECT iduse,uname,email from uinfo order by id ASC limit 0,4

-- --传入表名，返回总的记录条数
CALL GetRecordCount('uinfo','')

C#程序

protected void get_data()

    {

        string strWhere = " where idmde='" + DropDownList1.SelectedValue + "' and idmke='" + DropDownList2.SelectedValue + "'";

        string fldName = "iduse,uname,email,euser,werks"; 

        int pageSize = ;

        int pageCount = ;

        int pageCountMod = ;

        int doCount = ;

        int pageIndex = System.Convert.ToInt32(pageIndexLab.Text.ToString());

        myco = new MySqlConnection(strconn);

        myco.Open();

        mycomm = new MySqlCommand("GetRecordCount", myco);

        mycomm.CommandType = CommandType.StoredProcedure;

        MySqlParameter[] para = new MySqlParameter[]{

            new MySqlParameter("@tbName",MySqlDbType.VarChar,),

            new MySqlParameter("@strWhere",MySqlDbType.VarChar,)};

        para[].Value = "uinfo";

        para[].Value = strWhere;

        mycomm.Parameters.AddRange(para);

        MySqlDataReader mydr=mycomm.ExecuteReader();

        while(mydr.Read()){

            pageCount = System.Convert.ToInt32(mydr["countStr"].ToString()) ;

            pageCountMod = pageCount % pageSize;

            pageCount= pageCount/ pageSize;

            if (pageCount == )

            {

                //pageCount++;

            }

            else

            {

                if (pageCountMod != )

                {

                    pageCount++;

                }

            }

            pageCountLab.Text = pageCount.ToString();

        }

        if (pageIndex == )

        {

            pageIndex++;

        }

        mydr.Close();

        mycomm.Dispose();

        mycomm = new MySqlCommand("GetRecordAsPage", myco);

        mycomm.CommandType = CommandType.StoredProcedure;

        para.Initialize();

        para = new MySqlParameter[]{

            new MySqlParameter("@tbName",MySqlDbType.VarChar,),

            new MySqlParameter("@fldName",MySqlDbType.VarChar,),

            new MySqlParameter("@strWhere",MySqlDbType.VarChar,),

            new MySqlParameter("@pageIndex",MySqlDbType.Int32),

            new MySqlParameter("@pageSize",MySqlDbType.Int32),

            new MySqlParameter("@orderType",MySqlDbType.Int16),

            new MySqlParameter("@sortName",MySqlDbType.VarChar,)};

        para[].Value = "uinfo";

        para[].Value = fldName;

        para[].Value = strWhere;

        para[].Value = pageIndex;

        para[].Value = pageSize;

        para[].Value = ;

        para[].Value = "iduse";

        mycomm.Parameters.AddRange(para);

        MySqlDataAdapter myAdapter = new MySqlDataAdapter(mycomm);

        DataSet myDataSet = new DataSet();

        DataView m_DataView = new DataView();

        myAdapter.Fill(myDataSet);

        m_DataView = myDataSet.Tables[].DefaultView;

        GridView1.DataSource = m_DataView;

        GridView1.DataBind();

        GridView2.DataSource = m_DataView;

        GridView2.DataBind();

        GridView3.DataSource = m_DataView;

        GridView3.DataBind();

        DropDownpage.Items.Clear();

        if (pageCount != )

        {

            doCount = ;

            while (doCount < pageCount)

            {

                doCount++;

                DropDownpage.Items.Add(new ListItem(doCount.ToString()+"页", doCount.ToString()));

            }

        }

        if (pageIndex == )

        {           

            Button_IndexFirst.Enabled = false;

            Button_IndexPrevious.Enabled = false;

            Button_IndexNext.Enabled = true;

            Button_IndexLast.Enabled = true;

        }

        else if (pageIndex == pageCount)

        {

            Button_IndexFirst.Enabled = true;

            Button_IndexPrevious.Enabled = true;

            Button_IndexNext.Enabled = false;

            Button_IndexLast.Enabled = false;

        }

        else

        {

            Button_IndexFirst.Enabled = true;

            Button_IndexPrevious.Enabled = true;

            Button_IndexNext.Enabled = true;

            Button_IndexLast.Enabled = true;

        }

        if (pageCount ==  || pageCount == )

        {

            pageIndex = pageCount;

            Button_IndexFirst.Enabled = false;

            Button_IndexPrevious.Enabled = false;

            Button_IndexNext.Enabled = false;

            Button_IndexLast.Enabled = false;

            DropDownpage.Enabled = false;

        }

        else

        {

            DropDownpage.Enabled = true;

        }

        pageIndexLab.Text = pageIndex.ToString();

        if (pageIndex != )

        {

            DropDownpage.SelectedItem.Selected = false;

            DropDownpage.Items.FindByValue(pageIndex.ToString()).Selected = true;

        }

        myco.Close();

    }

    protected void Button_IndexFirst_Click(object sender, EventArgs e)

    {

        pageIndexLab.Text = "";

        if (pageCountLab.Text.Equals(""))

        {

            pageIndexLab.Text = "";

        }

        get_data();

    }

    protected void Button_IndexPrevious_Click(object sender, EventArgs e)

    {

        int pageIndex = System.Convert.ToInt32(pageIndexLab.Text.ToString());

        pageIndex--;

        if (pageIndex < )

        {

            pageIndex = ;

        }

        pageIndexLab.Text = pageIndex.ToString();

        get_data();

    }

    protected void Button_IndexNext_Click(object sender, EventArgs e)

    {

        int pageIndex = System.Convert.ToInt32(pageIndexLab.Text.ToString());

        int pageCount = System.Convert.ToInt32(pageCountLab.Text.ToString());

        pageIndex++;

        if (pageIndex > pageCount)

        {

            pageIndex = pageCount;

        }

        pageIndexLab.Text = pageIndex.ToString();

        get_data();

    }

    protected void Button_IndexLast_Click(object sender, EventArgs e)

    {

        int pageIndex = System.Convert.ToInt32(pageIndexLab.Text.ToString());

        int pageCount = System.Convert.ToInt32(pageCountLab.Text.ToString());

        pageIndex = pageCount;

        pageIndexLab.Text = pageIndex.ToString();

        get_data();

    }

    protected void DropDownpage_SelectedIndexChanged(object sender, EventArgs e)

    {

        pageIndexLab.Text = DropDownpage.SelectedValue;

        get_data();

    }