存储过程DataGrid分页及注意点 选择自 mail_ricklee 的 Blog

sqlserver中的存储过程完整代码
/*****************************************************************
* 存储过程名: GetCustomersDataPage
* 过程描述: 通用大数据集分页
* 传入参数：
* 传出参数：
* 修改记录
* 姓名 日期 修改类型
* NickLee 2005－1－17 新建
*
*
*
*
*
******************************************************************/
-- 获取指定页的数据
CREATE PROCEDURE [GetCustomersDataPage]
@PageIndex INT, --页面索引,从datagrid中获取
@PageSize INT, --页面显示数量，从datagrid中获取
@RecordCount INT OUT, --返回记录总数
@PageCount INT OUT, --返回分页后页数
@strGetFields nvarchar(1000), -- 需要查询的列
@tableName nvarchar(500) , --表名称
@ID nvarchar(100), --主键,（为表的主键）
@strWhere nvarchar(1000) ='', -- 查询条件 (注意: 不要加 where)
@sortName nvarchar(50) =' asc ' , --排序方式
@orderName nvarchar(100) --父级查询排序方式
AS
declare @countSelect nvarchar(2000)
--设置统计查询语句
if len(@strWhere) =0
--如果没有查询条件
begin
set @countSelect=N'SELECT @CountRecord = COUNT(*) FROM '+@tableName
end
else
--否则
begin
set @countSelect=N'SELECT @CountRecord = COUNT(*) FROM '+@tableName+' where '+@strWhere
end
--执行并返回总数
exec sp_executesql @countSelect,N'@CountRecord int output',@RecordCount output
SET @PageCount = CEILING(@RecordCount * 1.0 / @PageSize)
SET NOCOUNT ON
DECLARE @SQLSTR NVARCHAR(3000)
--实际总共的页码小于当前页码 或者 最大页码
if @PageCount>=0
--如果分页后页数大于0
begin
if @PageCount<=@PageIndex and @PageCount>0 --如果实际总共的页数小于datagrid索引的页数
--or @PageCount=1
begin
--设置为最后一页
set @PageIndex=@PageCount-1
end
else if @PageCount<=@PageIndex and @PageCount=0
begin
set @PageIndex=0;
end
end
IF @PageIndex = 0 OR @PageCount <= 1 --如果为第一页
begin
if len(@strWhere) =0
begin
SET @SQLSTR =N'SELECT TOP '+STR( @PageSize )+@strGetFields+' FROM '+@tableName+' ORDER BY '+@orderName+@sortName
end
else
begin
SET @SQLSTR =N'SELECT TOP '+STR( @PageSize )+@strGetFields+' FROM '+@tableName+' where '+@strWhere+' ORDER BY '+@orderName+@sortName
end
end
ELSE IF @PageIndex = @PageCount - 1 --如果为最后一页
begin
if len(@strWhere) =0
begin
SET @SQLSTR =N' SELECT '+@strGetFields+' FROM '+@tableName+' where '+@ID+' not in ( SELECT TOP '+STR(/*@RecordCount - */@PageSize * @PageIndex )+@ID+' FROM '+@tableName+'ORDER BY '+@orderName+@sortName+' ) ORDER BY '+@orderName+@sortName
end
else
begin
SET @SQLSTR =N' SELECT '+@strGetFields+' FROM '+@tableName+' where '+@ID+' not in ( SELECT TOP '+STR(/*@RecordCount - */ @PageSize * @PageIndex )+@ID+' FROM '+@tableName+' where '+@strWhere+'ORDER BY '+@orderName+@sortName+' ) and '+@strWhere+' ORDER BY '+@orderName+@sortName
end
end
ELSE --否则执行
begin
if len(@strWhere) =0
begin
SET @SQLSTR =N' SELECT TOP '+STR( @PageSize )+@strGetFields+' FROM '+@tableName+' where '+@ID+' not in ( SELECT TOP '+STR( /*@RecordCount - */@PageSize * @PageIndex )+@ID+' FROM '+@tableName+' ORDER BY '+@orderName+@sortName+' ) ORDER BY '+@orderName+@sortName
end
else
begin
SET @SQLSTR =N' SELECT TOP '+STR( @PageSize )+@strGetFields+' FROM '+@tableName+' where '+@ID+' not in (SELECT TOP '+STR(/*@RecordCount - */ @PageSize * @PageIndex )+@ID+' FROM '+@tableName+' where '+@strWhere+' ORDER BY '+@orderName+@sortName+' )and '+@strWhere+'ORDER BY '+@orderName+@sortName
end
end
EXEC (@SQLSTR)
set nocount off
GO

在asp.net中调用方法
#region 调用函数
//绑定数据
private void DataGridDataBind()
{
DataSet ds = GetCustomersData(PageIndex,PageSize,ref recordCount,ref pageCount);
DataGrid1.VirtualItemCount = RecordCount;
DataGrid1.DataSource = ds;
DataGrid1.DataBind();
// GridExpand(this.DataGrid1,2);
SetPagingState();
}
private DataSet GetCustomersData(int pageIndex,int pageSize,ref int recordCount,ref int pageCount)
{
dataFill.ConString=System.Configuration.ConfigurationSettings.AppSettings["SqlConnectionString"];
dataFill.sqlClientDataSet("GetCustomersDataPage");
System.Data.SqlClient.SqlDataAdapter comm=dataFill.mySqlAdapter;
comm.SelectCommand.Parameters.Add(new SqlParameter("@PageIndex",SqlDbType.Int));
comm.SelectCommand.Parameters[0].Value = pageIndex;
comm.SelectCommand.Parameters.Add(new SqlParameter("@PageSize",SqlDbType.Int));
comm.SelectCommand.Parameters[1].Value = pageSize;
comm.SelectCommand.Parameters.Add(new SqlParameter("@RecordCount",SqlDbType.Int));
comm.SelectCommand.Parameters[2].Direction = ParameterDirection.Output;
comm.SelectCommand.Parameters.Add(new SqlParameter("@PageCount",SqlDbType.Int));
comm.SelectCommand.Parameters[3].Direction = ParameterDirection.Output;
comm.SelectCommand.Parameters.Add(new SqlParameter("@strGetFields",SqlDbType.NVarChar));
comm.SelectCommand.Parameters[4].Value ="tOrder.orderTime as '下订单时间',tOrder.facName as '工厂',tOrder.facOrderNum as '工厂订单号',tOrder.quantity as '定单数',tOrder.realQuantity as '实际出货数',tOrder.reqTime as '要求出货时间',tOrder.repTime as '出货时间',tMaterial.matName as '材料',tMaterial.colName as '颜色',tOrder.leaveQuantity as '未出货数',tOrder.orderStatic as '全部出货',tOrder.orderDetail as '备注' ";
/*tOrder.comName as '公司',tOrder.comOrderNum as '公司订单号',*/
comm.SelectCommand.Parameters.Add(new SqlParameter("@tableName",SqlDbType.NVarChar));
comm.SelectCommand.Parameters[5].Value =" tOrder left join tStock on tOrder.stoID=tStock.stoID left join tMaterial on tStock.matID=tMaterial.matID ";
comm.SelectCommand.Parameters.Add(new SqlParameter("@ID",SqlDbType.NVarChar));
comm.SelectCommand.Parameters[6].Value =" tOrder.orderID ";
comm.SelectCommand.Parameters.Add(new SqlParameter("@orderName",SqlDbType.NVarChar));
comm.SelectCommand.Parameters[7].Value =" tMaterial.matName ";
comm.SelectCommand.Parameters.Add(new SqlParameter("@strWhere",SqlDbType.NVarChar));
comm.SelectCommand.Parameters[8].Value =" facName='"+en1.decyrpt(this.Request.QueryString["facName"].ToString())+"' and facOrderNum='"+en1.decyrpt(this.Request.QueryString["facNum"].ToString())+"' ";
// comm.Parameters.Add(new SqlParameter("@sortName",SqlDbType.NVarChar));
// comm.Parameters[8].Value =" desc ";
comm.Fill(dataFill.myDateSet);
recordCount = (int)comm.SelectCommand.Parameters[2].Value;
pageCount = (int)comm.SelectCommand.Parameters[3].Value;
if(pageIndex>=pageCount&&pageCount>0)
{
PageIndex=pageCount-1;
}
else if(pageIndex>=pageCount&&pageCount==0)
{
PageIndex=0;
}
//
return dataFill.myDateSet;
}
/// <summary>
/// 控制导航按钮或数字的状态
/// </summary>
public void SetPagingState()
{
if( PageCount <= 1 )//( RecordCount <= PageSize )//小于等于一页
{
this.Menu1.Items[0].Enabled = false;
this.Menu1.Items[1].Enabled = false;
this.Menu1.Items[2].Enabled = false;
this.Menu1.Items[3].Enabled = false;
}
else //有多页
{
if( PageIndex == 0 )//当前为第一页
{
this.Menu1.Items[0].Enabled = false;
this.Menu1.Items[1].Enabled = false;
this.Menu1.Items[2].Enabled = true;
this.Menu1.Items[3].Enabled = true;
}
else if( PageIndex == PageCount - 1 )//当前为最后页
{
this.Menu1.Items[0].Enabled = true;
this.Menu1.Items[1].Enabled = true;
this.Menu1.Items[2].Enabled = false;
this.Menu1.Items[3].Enabled = false;
}
else //中间页
{
this.Menu1.Items[0].Enabled = true;
this.Menu1.Items[1].Enabled = true;
this.Menu1.Items[2].Enabled = true;
this.Menu1.Items[3].Enabled = true;
}
}
if(RecordCount == 0)
{
lab_PageCount.Text="第0页 共0页 每页"+PageSize.ToString()+"条 共"+RecordCount.ToString()+"条";
}
else
{
lab_PageCount.Text="第"+(PageIndex + 1).ToString()+"页 共"+PageCount.ToString()+"页 每页"+PageSize.ToString()+"条 共"+RecordCount.ToString()+"条";
}
}
#endregion

重点在数据对datagrid绑定前进行判定
if(pageIndex>=pageCount&&pageCount>0)
{
PageIndex=pageCount-1;
}
else if(pageIndex>=pageCount&&pageCount==0)
{
PageIndex=0;
}