ASP.NET存储过程分页
存储过程:
createPROCEDURE pagelist
@tablenamenvarchar(50),
@fieldnamenvarchar(50)="*",
@pagesizeint,--每页显示记录条数
@currentpageint,--第几页
@orderidnvarchar(50),--主键排序
@sortint,--排序方式,1表示升序,0表示降序排列
@rowcountint output,--总记录数,共有几条信息
@pagecountint output--总页数,共有多少页
AS
declare@countsqlnvarchar(50)
declare@sqlnvarchar(200)
declare@subsqlnvarchar(100)--notin子sql语句
declare@tmpOrderidnvarchar(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"@totalcountint out",@rowcount
output
--判断字段名是否为空
if@fieldnameisnullor@fieldname=""
set@fieldname="* "
--判断是否排序及排序方式
if@orderidisnullor@orderid=""
set@tmpOrderid=""
else
begin
if@sort=0
set@tmpOrderid="orderby "+@orderid+"
desc"
else
set@tmpOrderid="orderby "+@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="selecttop"+str(@pagesize*(@currentpage-1))+"
"+@orderid+"from "+@tablename+"
"+@tmpOrderid
set@sql="selecttop"+str(@pagesize)+"
"+@fieldname+"from "+@tablename+"
where "+@orderid+"not in ("+@subsql+")"+@tmpOrderid
exec(@sql)
.cs文件:
protectedvoid 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 = newSqlConnection(ConfigurationManager.AppSettings["ConnStr"].ToString());
SqlCommand cmd = newSqlCommand("pagelist", sqlconn);
cmd.CommandType =CommandType.StoredProcedure;
cmd.Connection = sqlconn;
SqlParameter[] prams ={
newSqlParameter("@tablename",SqlDbType.NVarChar,50),
newSqlParameter("@fieldname",SqlDbType.NVarChar,50),
newSqlParameter("@pagesize",SqlDbType.Int),
newSqlParameter("@currentpage",SqlDbType.Int),
newSqlParameter("@orderid",SqlDbType.NVarChar,50),
newSqlParameter("@sort",SqlDbType.Int),
newSqlParameter("@rowcount",SqlDbType.Int),
newSqlParameter("@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(SqlParameterpram
in prams)
{
cmd.Parameters.Add(pram);
}
sqlconn.Open();
SqlDataAdapter sda = newSqlDataAdapter();
DataSet ds = newDataSet();
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:LabelID="lblPageSize"
runat="server"></asp:Label>条
| 共有<asp:LabelID="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/>