Repeater自定义分页排序(2)

分页加排序的存储过程:

--得到总记录数
if exists(select 1 from sys.objects where name = 'GetProductsCount' and type = 'P')
drop proc GetProductsCount
go
CREATE PROCEDURE GetProductsCount
as
select count(*) from products
go

--分页加排序
if exists(select 1 from sys.objects where name = 'GetProductsByPage' and type = 'P')
drop proc GetProductsByPage
go
CREATE PROCEDURE GetProductsByPage
@sortExpression nvarchar(100),
@pageNumber int,
@pageSize int
AS
-- 确保指定了 @sortExpression
IF LEN(@sortExpression) = 0
SET @sortExpression = 'ProductID'
DECLARE @sql nvarchar(4000)
set @sql = 'select ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
from (select row_number() Over (order by ' + @sortExpression + ') as row,ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
from products) as ProductsWithRowNumber
where row between ' + convert(varchar, (@pageNumber - 1) * @pageSize + 1) + ' and ' + convert(varchar, @pageNumber * @pageSize)
exec sp_executesql @sql
go

--exec GetProductsByPage 'productid desc', 1, 10
--exec GetProductsByPage 'ProductName desc',5, 10
--exec GetProductsByPage '', 1, 10
页面代码
无法忍受如此垃圾的编辑器，页面代码转换的一塌糊涂，所以Repeater标记部分用图片代替
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转到第页



后台代码如下:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient;

public partial class RepeaterPagingSorting : System.Web.UI.Page
{
//每页显示的最多记录的条数
private int pageSize = 10;
//当前页号
private int currentPageNumber;
//排序表达式
private string sortExpression = string.Empty;
//排序方向
private string sortDirection = string.Empty;
//显示数据的总条数
private static int rowCount;
//总页数
private static int pageCount;

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("GetProductsCount", cn);
cmd.CommandType = CommandType.StoredProcedure;
cn.Open();
rowCount = (int)cmd.ExecuteScalar();
cn.Close();
pageCount = (rowCount - 1) / pageSize + 1;
currentPageNumber = 1;
for (int i = 1; i <= pageCount; i++)
{
dropPage.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
Query();
}
sortExpression = ViewState["sortExpression"].ToString();
sortDirection = ViewState["sortDirection"].ToString();
currentPageNumber = Convert.ToInt32(ViewState["currentPageNumber"]);
}

private void Query()
{
SetButton(currentPageNumber);
SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("GetProductsByPage", cn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@sortExpression", sortExpression + " " + sortDirection);
cmd.Parameters.AddWithValue("@pageNumber", currentPageNumber);
cmd.Parameters.AddWithValue("@pageSize", pageSize);
cn.Open();
rptProducts.DataSource = cmd.ExecuteReader();
rptProducts.DataBind();
cn.Close();
lblMessage.Text = "共找到" + rowCount + "条记录, 当前第" + currentPageNumber + "/" + pageCount + "页";
Save();
}

protected void lbtnPage_Command(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "First":
currentPageNumber = 1;
break;
case "Previous":
currentPageNumber = (int)ViewState["currentPageNumber"] - 1 > 1 ? (int)ViewState["currentPageNumber"] - 1 : 1;
break;
case "Next":
currentPageNumber = (int)ViewState["currentPageNumber"] + 1 < pageCount ? (int)ViewState["currentPageNumber"] + 1 : pageCount;
break;
case "Last":
currentPageNumber = pageCount;
break;
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
Query();
}

protected void lbtnSort_Command(object sender, CommandEventArgs e)
{
if (e.CommandName != ViewState["sortExpression"].ToString())
{
sortDirection = "ASC";
}
else
{
if (sortDirection == "ASC")
{
sortDirection = "DESC";
}
else if (sortDirection == "DESC" || sortDirection == string.Empty)
{
sortDirection = "ASC";
}
}
sortExpression = e.CommandName ;
Query();
}

protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)
{
currentPageNumber = int.Parse(dropPage.SelectedValue);
Query();
}

private void SetButton(int currentPageNumber)
{
lbtnFirst.Enabled = currentPageNumber != 1;
lbtnPrevious.Enabled = currentPageNumber != 1;
lbtnNext.Enabled = currentPageNumber != pageCount;
lbtnLast.Enabled = currentPageNumber != pageCount;
}

private void Save()
{
ViewState["currentPageNumber"] = currentPageNumber;
ViewState["sortExpression"] = sortExpression;
ViewState["sortDirection"] = sortDirection;
}

protected void rptProducts_ItemCreated(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Header)
{
if (!string.IsNullOrEmpty(sortDirection))
{
Label lblSort = new Label();
lblSort.EnableTheming = false;
lblSort.Font.Name = "webdings";
lblSort.Font.Size = FontUnit.Small;
lblSort.Text = sortDirection == "ASC" ? "5" : "6";
(e.Item.FindControl("td" + sortExpression) as HtmlTableCell).Controls.Add(lblSort);
}
}
}
}
分页排序效果图: