sql server2005 分页特性
在sql server 2005的新功能中，比较西黄分页功能，通过查询函数row_number over(order by field)实现是提取分页数据当页的记录，此功能原理上和临时表差不多，不过通过插叙语句操作就快捷多了，做了个demo，分页效果很好。
1、新建一个default.aspx页面，内容很简单，就一个数据控件和一个分页导航标记条。
<body>
<form id="form1" runat="server">
<div>
<asp:DataGrid ID="datalist" runat="server"></asp:DataGrid>
<asp:Label ID="pager" runat="server"></asp:Label>
</div>
</form>
1、新建一个default.aspx页面，内容很简单，就一个数据控件和一个分页导航标记条。
<body>
<form id="form1" runat="server">
<div>
<asp:DataGrid ID="datalist" runat="server"></asp:DataGrid>
<asp:Label ID="pager" runat="server"></asp:Label>
</div>
</form>
</body>
2、在代码里，主要根据传送的参数去数据表里去当前页的记录，每次都只去一页的记录。
protected
void
Page_Load(
object
sender, EventArgs e)
{
Bind();
}
// 获取记录总数
private int RowCount
{
get
{
string connStr = ConfigurationManager.ConnectionStrings[ " connstr " ].ToString();
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sqlStr = " select count(1) from tbl_MailList " ;
SqlDataAdapter ada = new SqlDataAdapter(sqlStr, conn);
DataSet ds = new DataSet();
ada.Fill(ds);
conn.Close();
return int .Parse(ds.Tables[ 0 ].Rows[ 0 ][ 0 ].ToString());
}
}
// 绑定数据
private void Bind()
{
// 首页地址
string url = " default.aspx " ;
// 每页数量
int size = 10 ;
// 总记录
int TotalCount = RowCount;
// 开始记录
int start = 1 ;
try
{
start = int .Parse(Request.Params[ " start " ].ToString());
}
catch
{
}
// 结束记录
int end = size;
try
{
end = int .Parse(Request.Params[ " end " ].ToString());
}
catch
{
}
string connStr = ConfigurationManager.ConnectionStrings[ " connstr " ].ToString();
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sqlStr = " select * from (select *,row_number() over(order by AddrId) as row from tbl_maillist) as mail where row between " + start + " and " + end;
SqlDataAdapter ada = new SqlDataAdapter(sqlStr, conn);
DataSet ds = new DataSet();
ada.Fill(ds);
conn.Close();
datalist.DataSource = ds.Tables[ 0 ];
datalist.DataBind();
// 当前页码
int CurrentPage = 1 ;
try
{
CurrentPage = int .Parse(Request.Params[ " CurrentPage " ].ToString());
}
catch
{
}
// 分页数量
int PageCount = TotalCount / size;
if (TotalCount % size != 0 )
{
PageCount = PageCount + 1 ;
}
// 呈现页面导航
StringBuilder sb = new StringBuilder();
// 只有1页
if (PageCount < 2 || CurrentPage == 1 )
{
sb.Append( " 首页 " );
sb.Append( " 上一页 " );
}
else
{
sb.Append( " <a href= " + url + " ?start=1&end= " + size + " &CurrentPage=1>首页</a> " );
sb.Append( " <a href= " + url + " ?start= " + ((CurrentPage - 2 ) * size + 1 ) + " &end= " + (CurrentPage - 1 ) * size + " &CurrntPage= " + (CurrentPage - 1 ) + " >上一页</a> " );
}
// 超过10页只显示10页
if (PageCount > 10 )
{
for ( int intLoop = 1 ; intLoop < 11 ; intLoop ++ )
{
// 当前页没有超连接
if (CurrentPage == intLoop)
{
sb.Append( " " + intLoop.ToString());
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((intLoop - 1 ) * size + 1 ) + " &end= " + (intLoop * size) + " &CurrentPage= " + intLoop + " > " + intLoop + " </a> " );
}
}
sb.Append( "
"
);
}
else
{
for ( int intLoop = 1 ; intLoop < PageCount + 1 ; intLoop ++ )
{
// 当前页没有超连接
if (CurrentPage == intLoop)
{
sb.Append( " " + intLoop.ToString());
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((intLoop - 1 ) * size + 1 ) + " &end= " + (intLoop * size) + " &CurrentPage= " + intLoop + " > " + intLoop + " </a> " );
}
}
}
if (PageCount < 2 || CurrentPage == PageCount)
{
sb.Append( " 下一页 " );
sb.Append( " 末页 " );
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((CurrentPage * size) + 1 ) + " &end= " + (CurrentPage + 1 ) * size + " &CurrentPage= " + (CurrentPage + 1 ) + " >下一页</a> " );
sb.Append( " <a href= " + url + " ?start= " + (((PageCount - 1 ) * size) + 1 ) + " &end= " + PageCount * size + " &CurrentPage= " + PageCount + " >末页</a> " );
}
pager.Text = sb.ToString();
}
{
Bind();
}
// 获取记录总数
private int RowCount
{
get
{
string connStr = ConfigurationManager.ConnectionStrings[ " connstr " ].ToString();
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sqlStr = " select count(1) from tbl_MailList " ;
SqlDataAdapter ada = new SqlDataAdapter(sqlStr, conn);
DataSet ds = new DataSet();
ada.Fill(ds);
conn.Close();
return int .Parse(ds.Tables[ 0 ].Rows[ 0 ][ 0 ].ToString());
}
}
// 绑定数据
private void Bind()
{
// 首页地址
string url = " default.aspx " ;
// 每页数量
int size = 10 ;
// 总记录
int TotalCount = RowCount;
// 开始记录
int start = 1 ;
try
{
start = int .Parse(Request.Params[ " start " ].ToString());
}
catch
{
}
// 结束记录
int end = size;
try
{
end = int .Parse(Request.Params[ " end " ].ToString());
}
catch
{
}
string connStr = ConfigurationManager.ConnectionStrings[ " connstr " ].ToString();
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sqlStr = " select * from (select *,row_number() over(order by AddrId) as row from tbl_maillist) as mail where row between " + start + " and " + end;
SqlDataAdapter ada = new SqlDataAdapter(sqlStr, conn);
DataSet ds = new DataSet();
ada.Fill(ds);
conn.Close();
datalist.DataSource = ds.Tables[ 0 ];
datalist.DataBind();
// 当前页码
int CurrentPage = 1 ;
try
{
CurrentPage = int .Parse(Request.Params[ " CurrentPage " ].ToString());
}
catch
{
}
// 分页数量
int PageCount = TotalCount / size;
if (TotalCount % size != 0 )
{
PageCount = PageCount + 1 ;
}
// 呈现页面导航
StringBuilder sb = new StringBuilder();
// 只有1页
if (PageCount < 2 || CurrentPage == 1 )
{
sb.Append( " 首页 " );
sb.Append( " 上一页 " );
}
else
{
sb.Append( " <a href= " + url + " ?start=1&end= " + size + " &CurrentPage=1>首页</a> " );
sb.Append( " <a href= " + url + " ?start= " + ((CurrentPage - 2 ) * size + 1 ) + " &end= " + (CurrentPage - 1 ) * size + " &CurrntPage= " + (CurrentPage - 1 ) + " >上一页</a> " );
}
// 超过10页只显示10页
if (PageCount > 10 )
{
for ( int intLoop = 1 ; intLoop < 11 ; intLoop ++ )
{
// 当前页没有超连接
if (CurrentPage == intLoop)
{
sb.Append( " " + intLoop.ToString());
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((intLoop - 1 ) * size + 1 ) + " &end= " + (intLoop * size) + " &CurrentPage= " + intLoop + " > " + intLoop + " </a> " );
}
}
sb.Append( "
"
);}
else
{
for ( int intLoop = 1 ; intLoop < PageCount + 1 ; intLoop ++ )
{
// 当前页没有超连接
if (CurrentPage == intLoop)
{
sb.Append( " " + intLoop.ToString());
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((intLoop - 1 ) * size + 1 ) + " &end= " + (intLoop * size) + " &CurrentPage= " + intLoop + " > " + intLoop + " </a> " );
}
}
}
if (PageCount < 2 || CurrentPage == PageCount)
{
sb.Append( " 下一页 " );
sb.Append( " 末页 " );
}
else
{
sb.Append( " <a href= " + url + " ?start= " + ((CurrentPage * size) + 1 ) + " &end= " + (CurrentPage + 1 ) * size + " &CurrentPage= " + (CurrentPage + 1 ) + " >下一页</a> " );
sb.Append( " <a href= " + url + " ?start= " + (((PageCount - 1 ) * size) + 1 ) + " &end= " + PageCount * size + " &CurrentPage= " + PageCount + " >末页</a> " );
}
pager.Text = sb.ToString();
}
执行效果很快，适合大量数据的分页。