DataGread的翻頁（轉轉）

 /*定義一個datatable dt */

SqlConnetion conn =creatConn(); 

SqldataAdapter   Adapter = new SqlDataAdapter(mySqlCode,conn);
            ds = new DataSet();
            /*****************************添加標識列***************************************/
            DataTable dt = new DataTable("test");
            DataColumn dc = dt.Columns.Add("pid",typeof(int));
            dc.AutoIncrement = true;
            dc.AutoIncrementSeed = 1;
            dc.AutoIncrementStep = 1;
            ds.Tables.Add(dt);
            /*****************************添加標識列***************************************/
            Adapter.Fill(ds,"test");
            dataGrid1.SetDataBinding(ds,"test");
            /****************************實現翻頁*****************************************/
            int rows = ds.Tables["test"].Rows.Count;
            if (rows % pagerows == 0)
            {
                totalpages = rows / pagerows;
            }
            else
            {
                totalpages = rows / pagerows + 1;
            }
            beginid = 1;
            endid = beginid + pagerows;
            //篩選
            DataView dv = ds.Tables["test"].DefaultView;
            dv.RowFilter = "pid> ="+beginid +"and pid <="+endid;
            dataGrid1.DataSource = dv;

            cupages=1;
            this.label1.Text = "當前頁爲：" + cupages;

 

 

 

/*下一頁* /

if (cupages  < totalpages)
            {
                beginid = endid;
                endid = beginid + pagerows;

                DataView dv = ds.Tables["test"].DefaultView;
                dv.RowFilter = "pid> =" + beginid + "and pid <=" + endid;
                //dataGrid1.DataSource = dv;

                cupages++;
                this.label1.Text = "當前面爲："+cupages;
            }

/*上一頁* /

 

            if (cupages> 1)
            {
                endid = beginid;
                beginid = beginid - pagerows;

                DataView dv = ds.Tables["test"].DefaultView;
                dv.RowFilter = "pid> ="+beginid+"and pid <="+endid;
                //dataGrid1.DataSource = dv;

                cupages--;
                this.label1.Text = "當前面爲："+cupages;
            }

 

/*獲得當前列出的id數組的sql語句*/

//第一種

SELECT * FROM ( 
SELECT TOP @PageSize * FROM ( 
SELECT TOP @PageSize*(@PageIndex+1) * FROM @TableName 
ORDER BY @PrimaryKey ASC 
) TableA ORDER BY @PrimaryKey DESC 
) TableB ORDER BY @PrimaryKey ASC 
//第二種

 

SELECT TOP @PageSize * FROM @TableName 
WHERE @PrimaryKey NOT IN ( 
SELECT TOP @PageSize*@PageIndex @PrimaryKey FROM @TableName 
ORDER BY @PrimaryKey ASC 
) ORDER BY @PrimaryKey ASC