如何使DataGrid显示的时候按某一列的降序排？

在给datagrid绑定数据时使用的sql语句中先降排序
select * from YourTableName order by YourColumnName DESC
OK!!!

DataGrid.DefaultView.Sort = "列名 DESC";

排序的问题大部分书上都有讲述。在DataGrid标签中加上属性：AllowSorting="True"，OnSortCommand="SortGrid"。在后台代码中方法实现：
void SortGrid( object src ,DataGridSortCommandEventArgs e )
{
    string strSortFiled = (string) e.SortExpression; //取得排序字段
    string strSQL = "select * from mytable order by " + strSortFiled + " desc"
    //此处省略，作用是重新绑定DataGrid
}

用SQL语句可以了。或者设置DataGrid的Attribute["SortExpression"]为某一列DESC

protected void DataGridMe_Sort(Object sender, DataGridSortCommandEventArgs e)
{
ds =GetDataSet();
DataView Source = ds.Tables[0].DefaultView;
Source.Sort =e.SortExpression + " desc";
DataGridMe.DataSource=Source;
DataGridMe.DataBind();
}

给你个例子：
webform.aspx
<%@ Register TagPrefix="uc1" TagName="UC_Top" Src="../UserControl/UC_Top.ascx" %>
<%@ Page language="c#" Codebehind="ManageTypeZ.aspx.cs" AutoEventWireup="false" Inherits="Baili.ManageTypeZ" %>
<%@ Register TagPrefix="cc1" Namespace="Ghost.Pagination" Assembly="Ghost.Pagination" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>ManageTypeZ</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<link rel="stylesheet" type="text/css" href="../Common/Style.css">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<TABLE id="Table1" cellSpacing="1" cellPadding="1" width="100%" border="1">
<TR>
<TD>
<asp:Label id="lb_Manage" runat="server"></asp:Label></TD>
</TR>
<TR>
<TD>
<asp:DataGrid id="dg_TypeZ" runat="server" Width="100%" AutoGenerateColumns="False" AllowSorting="True">
<Columns>
<asp:TemplateColumn HeaderText="选择">
<ItemTemplate>
<%# ShowCheckBox(int.Parse(DataBinder.Eval(Container.DataItem, "TypeID").ToString())) %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn SortExpression="TypeZ" HeaderText="Z轴类别(中文)">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "TypeZ") %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn SortExpression="TypeZEn" HeaderText="Z轴类别(英文)">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "TypeZEn") %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn SortExpression="TypeXID" HeaderText="X轴类别">
<ItemTemplate>
制鞋工厂
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn SortExpression="TypeYID" HeaderText="Y轴类别">
<ItemTemplate>
<%# ShowTypeXYName(int.Parse(DataBinder.Eval(Container.DataItem, "TypeYID").ToString())) %>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid></TD>
</TR>
<TR>
<TD align="right">
<cc1:Pagination id="Paging" runat="server"></cc1:Pagination></TD>
</TR>
</TABLE>
</form>
</body>
</HTML>

cs文件
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;namespace Baili
{
/// <summary>
/// ManageTypeZ 的摘要说明。
/// </summary>
public class ManageTypeZ : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lb_Manage;
protected System.Web.UI.WebControls.DataGrid dg_TypeZ;
protected Ghost.Pagination.Pagination Paging;
DataBase db = new DataBase();

private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
ViewState["SortDesc"] = true;
ViewState["SortField_New"] = "TypeID";
ViewState["SortField_Old"] = "TypeID";
this.lb_Manage.Text = new ManageInput(Config.TypeZActionUrl + "?Type=TypeZ_Add", Config.TypeZActionUrl).OutPut(true, true, true,true, true, Config.ModalDialogWidth, Config.ModalDialogHeight, "", Config.ale_TypeZDelConfirm, "TypeID", "Type=TypeZ_Modify");
} if(null != Request.Form[Config.DeleteButtonName] && Request.Form[Config.DeleteButtonName].ToString() == Config.DeleteButtonValue)
{
// 删除Y轴类别
if(Function.DeleteMessageByCheckBoxValue("CompanyTypeZ", "TypeID"))
{
Page.Controls.Add(new LiteralControl(Function.AlertScript(Config.ale_TypeZDelSuccess)));
}
else
{
Page.Controls.Add(new LiteralControl(Function.AlertScript(Config.ale_TypeZDelAbort)));
}
}
// 在此处放置用户代码以初始化页面
} protected override void OnPreRender(EventArgs e)
{
this.BinderDataGrid();
base.OnPreRender (e);
} #region DataGrid Client
public string ShowCheckBox(int CountryID)
{
return Function.ShowCheckBox(CountryID);
}
public string ShowTypeXYName(int TypeYID)
{
return Function.GetTypeYNameByID(TypeYID);
}
#endregion private void BinderDataGrid()
{
string sql = "SELECT * FROM CompanyTypeZ ";
sql += " ORDER BY " + ViewState["SortField_New"].ToString();
if((bool)ViewState["SortDesc"])
{
sql += " Desc";
}
SqlCommand sqlcmd = new SqlCommand(sql, db.GetConnection()); this.Paging.Pagination_SqlCommand = sqlcmd;
DataSet ds = this.Paging.GetCurrentPageDataSet(); this.dg_TypeZ.DataSource = ds;
this.dg_TypeZ.DataBind();
} #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.dg_TypeZ.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.dg_TypeZ_SortCommand);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion private void dg_TypeZ_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
ViewState["SortField_New"] = e.SortExpression;
if(ViewState["SortField_New"].ToString() == ViewState["SortField_Old"].ToString())
{
ViewState["SortDesc"] = !(bool)ViewState["SortDesc"];
}
ViewState["SortField_Old"] = ViewState["SortField_New"].ToString();
string Sort;
if((bool)ViewState["SortDesc"])
{
Sort = "▼";
}
else
{
Sort = "▲";
}
this.dg_TypeZ.Columns[1].HeaderText = "Z轴类别(中文)";
this.dg_TypeZ.Columns[2].HeaderText = "Z轴类别(英文)";
this.dg_TypeZ.Columns[3].HeaderText = "X轴类别";
this.dg_TypeZ.Columns[4].HeaderText = "Y轴类别"; if(e.SortExpression == "TypeZ")
{
this.dg_TypeZ.Columns[1].HeaderText = "Z轴类别(中文)" + Sort;
}
else if(e.SortExpression == "TypeZEn")
{
this.dg_TypeZ.Columns[2].HeaderText = "Z轴类别(英文)" + Sort;
}
else if(e.SortExpression == "TypeXID")
{
this.dg_TypeZ.Columns[3].HeaderText = "X轴类别" + Sort;
}
else if(e.SortExpression == "TypeYID")
{
this.dg_TypeZ.Columns[4].HeaderText = "Y轴类别" + Sort;
}
}
}
}

注:楼上得各位都有缺陷加了where  查询后都会有问题的   (指使用分页时不管是自动还是手动)
自己生成sql 语句吧最灵活  或用proc 我给你个通用的/*--用存储过程实现的分页程序显示指定表、视图、查询结果的第X页
对于表中主键或标识列的情况,直接从原表取数查询，其它情况使用临时表的方法
如果视图或查询结果中有主键,不推荐此方法--邹建 2003.09--*//*--调用示例
exec p_show '地区资料' exec p_show '地区资料',5,3,'地区编号,地区名称,助记码','地区编号'
--*/
/*--调用示例
   use haihuioa
   exec p_show  'select * from clientservicelog where fkid=1 and pdate>=''2003-12-1'' and pdate<=''2003-12-3''      ',5,1,'','pdate asc'
   go
*/
/*
因为要顾及通用性,所以对带排序的查询语句有一定要求.如果先排序,再出结果.就是:exec p_show 'select top 100 percent * from 地区资料 order by 地区名称',5,3,'地区编号,地区名称,助记码'
--查询语句加上:top 100 percent
*/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_show]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_show]
GOCREATE Proc p_show
@QueryStr nvarchar(4000), --表名、视图名、查询语句
@PageSize int=5, --每页的大小(行数)
@PageCurrent int=1, --要显示的页
@FdShow nvarchar (4000)='', --要显示的字段列表,如果查询结果有标识字段,需要指定此值,且不包含标识字段
@FdOrder nvarchar (1000)='' --排序字段列表
as
declare @FdName nvarchar(250) --表中的主键或表、临时表中的标识列名
,@Id1 varchar(20),@Id2 varchar(20) --开始和结束的记录号
,@Obj_ID int --对象ID
--表中有复合主键的处理
declare @strfd nvarchar(2000) --复合主键列表
,@strjoin nvarchar(4000) --连接字段
,@strwhere nvarchar(2000) --查询条件
select @Obj_ID=object_id(@QueryStr)
,@FdShow=case isnull(@FdShow,'') when '' then ' *' else ' '+@FdShow end
,@FdOrder=case isnull(@FdOrder,'') when '' then '' else ' order by '+@FdOrder end
,@QueryStr=case when @Obj_ID is not null then ' '+@QueryStr else ' ('+@QueryStr+') a' end--如果显示第一页，可以直接用top来完成
if @PageCurrent=1
begin
select @Id1=cast(@PageSize as varchar(20))
exec('select top '+@Id1+@FdShow+' from '+@QueryStr+@FdOrder)
return
end--如果是表,则检查表中是否有标识更或主键
if @Obj_ID is not null and objectproperty(@Obj_ID,'IsTable')=1
begin
select @Id1=cast(@PageSize as varchar(20))
,@Id2=cast((@PageCurrent-1)*@PageSize as varchar(20)) select @FdName=name from syscolumns where id=@Obj_ID and status=0x80
if @@rowcount=0 --如果表中无标识列,则检查表中是否有主键
begin
if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype='PK')
goto lbusetemp --如果表中无主键,则用临时表处理 select @FdName=name from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
if @@rowcount>1 --检查表中的主键是否为复合主键
begin
select @strfd='',@strjoin='',@strwhere=''
select @strfd=@strfd+',['+name+']'
,@strjoin=@strjoin+' and a.['+name+']=b.['+name+']'
,@strwhere=@strwhere+' and b.['+name+'] is null'
from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
select @strfd=substring(@strfd,2,2000)
,@strjoin=substring(@strjoin,5,4000)
,@strwhere=substring(@strwhere,5,4000)
goto lbusepk
end
end
end
else
goto lbusetemp/*--使用标识列或主键为单一字段的处理方法--*/
lbuseidentity:
exec('select top '+@Id1+@FdShow+' from '+@QueryStr
+' where '+@FdName+' not in(select top '
+@Id2+' '+@FdName+' from '+@QueryStr+@FdOrder
+')'+@FdOrder
)
return/*--表中有复合主键的处理方法--*/
lbusepk:
exec('select '+@FdShow+' from(select top '+@Id1+' a.* from
(select top 100 percent * from '+@QueryStr+@FdOrder+') a
left join (select top '+@Id2+' '+@strfd+'
from '+@QueryStr+@FdOrder+') b on '+@strjoin+'
where '+@strwhere+') a'
)
return/*--用临时表处理的方法--*/
lbusetemp:
select @FdName='[ID_'+cast(newid() as varchar(40))+']'
,@Id1=cast(@PageSize*(@PageCurrent-1) as varchar(20))
,@Id2=cast(@PageSize*@PageCurrent-1 as varchar(20))exec('select '+@FdName+'=identity(int,0,1),'+@FdShow+'
into #tb from'+@QueryStr+@FdOrder+'
select '+@FdShow+' from #tb where '+@FdName+' between '
+@Id1+' and '+@Id2
)GO

调试易

如何使DataGrid显示的时候按某一列的降序排？

解决方案 »