【分享】真正的分页存储过程借鉴了CSDN上的很多长处 除了BUG版本 分享给大家
终极管理员 知识笔记 123阅读
在此，感谢所有在CSDNBLOG上发布相关话题的兄弟们。以下方法基于CSDNBLOG上关于分页存储过程的七篇文章。前段时间我在学习分页的时候，在CSDN的博客上看到一个师兄写的分页存储过程，非常不错，就用了这个存储过程。以下是原分页存储过程-start create procedure record from page @ TBL name varchar(255)，-table name @ @fldNamevarchar(255)，-)，-field name @ pagesizeint=10。页码@ iscountbit=0，-返回记录总数，如果不为0，则返回@ ordertypebit=0，-设置排序类型。如果值不为0，则按降序@ strhere varchar(1000)=“”-查询条件(注意不要将where添加到：)as declare @ strsqlvarchar(1000)-主语句declare @ strtmpvarchar(300)-临时变量declare @ strodervarchar (400)-=
tyle="color: rgba(0, 0, 0, 1)"> 0begin
set @strTmp = "<(select min"
set @strOrder = " order by [" + @fldName +"] desc"
end
else
begin
set @strTmp = ">(select max"
set @strOrder = " order by [" + @fldName +"] asc"
end
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
+ @fldName + "] from [" + @tblName + "]" + @strOrder + ") as tblTmp)"
+ @strOrder
if @strWhere != ’’
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
+ @fldName + "] from [" + @tblName + "] where " + @strWhere + " "
+ @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder
if @PageIndex = 1
begin
set @strTmp = ""
if @strWhere != ’’
set @strTmp = " where " + @strWhere
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "]" + @strTmp + " " + @strOrder
end
if @IsCount != 0
set @strSQL = "select count(*) as Total from [" + @tblName + "]"
exec (@strSQL)
GO
--结束
当我在用这个存储过程的时候,刚开始没有发现问题,后来当我的条件很复杂的时候,发现,此存储过程执行遇到错误,下面是出现问题的条件
id<>0 and (companyenname like ’%shenzhen%’ or companychname like ’%shenzhen%’ or web like ’%shenzhen%’ or memo like ’%shenzhen%’ or address like ’%shenzhen%’) order by [id] desc) as tblTmp) and id<>0 and (companyenname like ’%shenzhen%’ or companychname like ’%shenzhen%’ or web like ’%shenzhen%’ or memo like ’%shenzhen%’ or address like ’%shenzhen%’) and salesid=9
照说这个条件是没有问题的,可是,用上面的存储过程执行,却老是报告错误
后来,经调试,输出生成后的SQL语句,发现,原来问题是出现在嵌套的SQL语句中使用的()身上,于是,我把存储过程改为下面的效果,终于排除了BUG,下面的存储过程不管你的条件有多复杂,只要格式正确,就能运行
CREATE PROCEDURE GetRecordFromPage
@tblName varchar(255), -- 表名
@fldName varchar(255), -- 字段名
@PageSize int = 10, -- 页尺寸
@PageIndex int = 1, -- 页码
@IsCount bit = 0, -- 返回记录总数, 非 0 值则返回
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(1000) = ’’ -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL varchar(1000) -- 主语句
declare @strTmp varchar(300) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
if @OrderType != 0
begin
set @strTmp = "<(select min"
set @strOrder = " order by [" + @fldName +"] desc"
end
else
begin
set @strTmp = ">(select max"
set @strOrder = " order by [" + @fldName +"] asc"
end
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
+ @fldName + "] from [" + @tblName + "]" + @strOrder + ") as tblTmp)"
+ @strOrder
if @strWhere != ’’
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
+ @fldName + "] from [" + @tblName + "] where (" + @strWhere + ") "
+ @strOrder + ") as tblTmp) and (" + @strWhere + ") " + @strOrder
if @PageIndex = 1
begin
set @strTmp = ""
if @strWhere != ’’
set @strTmp = " where (" + @strWhere + ")"
set @strSQL = "select top " + str(@PageSize) + " * from ["
+ @tblName + "]" + @strTmp + " " + @strOrder
end
if @IsCount != 0
set @strSQL = "select count(*) as Total from [" + @tblName + "]"
exec (@strSQL)
GO
要注意看,修改后的存储过程在使用@strWhere时,都在其前后加上了(),这样,就防止嵌套的()出现错误
下面的代码是引用该存储过程的一个范例
SqlConnection MyConnection=new SqlConnection(ConfigurationSettings.AppSettings["dsn"]);
DataSet MyDataSet=new DataSet();
string strKeyword=Keyword.Text.Trim().Replace("\’","\’\’");
string strSalesId=Sales.SelectedItem.Value;
int RecordCount=CalcRecordCount();
RecordNumber.Text=RecordCount.ToString();
LblRecordNumber.Text=RecordCount.ToString();
string strExpress="Id<>0";
if (strKeyword!="")
strExpress=strExpress+" and (companyenname like ’%"+strKeyword+"%’ or companychname like ’%"+strKeyword+"%’ or Companyshortname like ’%"+strKeyword+"%’ or web like ’%"+strKeyword+"%’ or mainproduct like ’%"+strKeyword+"%’ or phone like ’%"+strKeyword+"%’ or memo like ’%"+strKeyword+"%’ or address like ’%"+strKeyword+"%’ or linkmanphone like ’%"+strKeyword+"%’)";
if (strSalesId!="")
strExpress=strExpress+" and salesid="+strSalesId;
SqlCommand MyCommand=new SqlCommand();
MyCommand.Connection=MyConnection;
MyCommand.CommandText="GetRecordFromPage";
MyCommand.CommandType=CommandType.StoredProcedure;
MyCommand.Parameters.Add("@tblName","customerview");
MyCommand.Parameters.Add("@fldName","id");
MyCommand.Parameters.Add("@strWhere",strExpress);
MyCommand.Parameters.Add("@PageSize",Int32.Parse(CustomerList.PageSize.ToString()));
MyCommand.Parameters.Add("@PageIndex",Int32.Parse(ViewState["PageIndex"].ToString())+1);
SqlDataReader MyReader;
MyConnection.Open();
MyReader=MyCommand.ExecuteReader();
CustomerList.VirtualItemCount=RecordCount;
CustomerList.DataSource=MyReader;
CustomerList.DataKeyField="id";
CustomerList.DataBind();
MyReader.Close();
MyConnection.Close();
在这里,要注意的是存储过程使用的PAGEINDEX变量是从1开始
回复人： heroman1979(网络虫子) ( ) 信誉：96 2004-8-19 18:24:44 得分: 0
最后,再排除一个BUG
将存储过程中
declare @strSQL varchar(1000) -- 主语句
declare @strTmp varchar(300) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
改为
declare @strSQL varchar(2000) -- 主语句
declare @strTmp varchar(1000) -- 临时变量
declare @strOrder varchar(1000) -- 排序类型
因为我在调试中发现有些查询用的语句选不止300
最后,只要将以上存储过程代码复制并加入到你的数据库中,再按照范例来调用即可了
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