SQL语句分页实现（转）
实际项目中暂没使用过 留着做个记录以备时需
存储过程：
create PROCEDURE pagelist@tablename nvarchar(50),
@fieldname nvarchar(50)='*',
@pagesize int,--每页显示记录条数
@currentpage int,--第几页
@orderid nvarchar(50),--主键排序
@sort int,--排序方式，1表示升序，0表示降序排列
@rowcount int output,--总记录数，共有几条信息
@pagecount int output--总页数，共有多少页
AS
declare @countsql nvarchar(50)
declare @sql nvarchar(200)
declare @subsql nvarchar(100)--not in子sql语句
declare @tmpOrderid nvarchar(50)
--返回总记录数，并赋值给输出参数@rowcount
set @countsql='select @totalcount=count(*) from '+@tablename
exec sp_executesql @countsql,N'@totalcount int out',@rowcount output
--判断字段名是否为空
if @fieldname is null or @fieldname=''
set @fieldname=' * '
--判断是否排序及排序方式
if @orderid is null or @orderid=''
set @tmpOrderid=' '
else
begin
if @sort=0
set @tmpOrderid='order by '+@orderid+' desc'
else
set @tmpOrderid='order by '+@orderid+' asc'
end
--计算页数
if @rowcount%@pagesize>0
set @pagecount =(@rowcount/@pagesize)+1;
else
set @pagecount=@rowcount/@pagesize;
--分页算法实现
set @subsql='select top'+str(@pagesize*(@currentpage-1))+' '+@orderid+' from '+@tablename+' '+@tmpOrderid
set @sql='select top'+str(@pagesize)+' '+@fieldname+' from '+@tablename+' where '+@orderid+' not in ('+@subsql+')'+@tmpOrderid
exec(@sql)
===========================================================
.cs文件：
protected void Page_Load(object sender, EventArgs e)
{
int CurrentPage,RowCount,PageCount;
int PageSize = 2;
if (Request["CurrentPage"] == null||Convert.ToInt32(Request["CurrentPage"])< 1)
{
CurrentPage=1;
}
else
{
CurrentPage=Convert.ToInt32(Request["CurrentPage"]);
}
//数据库操作
SqlConnection sqlconn = new SqlConnection(ConfigurationManager.AppSettings["ConnStr"].ToString());
SqlCommand cmd = new SqlCommand("pagelist", sqlconn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = sqlconn;
SqlParameter[] prams ={
new SqlParameter("@tablename",SqlDbType.NVarChar,50),
new SqlParameter("@fieldname",SqlDbType.NVarChar,50),
new SqlParameter("@pagesize",SqlDbType.Int),
new SqlParameter("@currentpage",SqlDbType.Int),
new SqlParameter("@orderid",SqlDbType.NVarChar,50),
new SqlParameter("@sort",SqlDbType.Int),
new SqlParameter("@rowcount",SqlDbType.Int),
new SqlParameter("@pagecount",SqlDbType.Int)};
prams[0].Value = "news";//表名
prams[1].Value ="*";//字段名
prams[2].Value =PageSize;//每页显示条数
prams[3].Value =CurrentPage;//当前页数
prams[4].Value ="id";//主键
prams[5].Value =1;//排序方式,0表示降序，1表示升序
prams[6].Direction = ParameterDirection.Output;//总记录数
prams[7].Direction = ParameterDirection.Output;//总页数
foreach(SqlParameter pram in prams)
{
cmd.Parameters.Add(pram);
}
sqlconn.Open();
SqlDataAdapter sda = new SqlDataAdapter();
DataSet ds = new DataSet();
sda.SelectCommand = cmd;
sqlconn.Close();
sda.Fill(ds);
//数据库操作结束
RowCount = (int)cmd.Parameters["@rowcount"].Value;
PageCount =(int)cmd.Parameters["@pagecount"].Value;
if (CurrentPage>PageCount)
{
Response.Redirect("CutPage.aspx?CurrentPage="+Convert.ToString(PageCount));
Response.End();
}
this.lblCurrent.Text = Convert.ToString(CurrentPage);
this.lblPageTotal.Text = Convert.ToString(PageCount);
this.lblRowsTotal.Text = Convert.ToString(RowCount);
this.lblPageSize.Text = Convert.ToString(PageSize);
this.hlFirst.NavigateUrl = "CutPage.aspx?CurrentPage=1";
this.hlPrev.NavigateUrl = "CutPage.aspx?CurrentPage=" + Convert.ToString(CurrentPage-1);
this.hlNext.NavigateUrl = "CutPage.aspx?CurrentPage=" + Convert.ToString(CurrentPage+1);
this.hlLast.NavigateUrl = "CutPage.aspx?CurrentPage=" + Convert.ToString(PageCount);
if (Convert.ToInt32(CurrentPage) == 1)
{
this.hlPrev.Enabled = false;
this.hlFirst.Enabled = false;
}
if (Convert.ToInt32(CurrentPage) == PageCount)
{
this.hlNext.Enabled = false;
this.hlLast.Enabled = false;
}
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
=================================================
aspx文件：
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
第<asp:Label ID="lblCurrent" runat="server"></asp:Label>页 | 每页<asp:Label ID="lblPageSize"
runat="server"></asp:Label>条 | 共有<asp:Label ID="lblPageTotal" runat="server"></asp:Label>页 | 共有<asp:Label ID="lblRowsTotal"
runat="server"></asp:Label>条信息 |
<asp:HyperLink ID="hlFirst" runat="server">首页</asp:HyperLink>
|
<asp:HyperLink ID="hlPrev" runat="server">上一页</asp:HyperLink>
|
<asp:HyperLink ID="hlNext" runat="server">下一页</asp:HyperLink>
|
<asp:HyperLink ID="hlLast" runat="server">尾页</asp:HyperLink><br />
