?? 對模板列排序.txt
字號:
正確設置排序表達式 SortExpression,多個字段用逗號分開。
AllowSorting=true
如果不設置列的HeaderText,或設為空串，那么排棄功能將不起作用。
示例了單個字段
1.頁面
<%@ Page language="c#" Codebehind="MyTemp.aspx.cs" AutoEventWireup="false" Inherits="Co_112.MyTemp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>MyTemp</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">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:DataGrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 96px; POSITION: absolute; TOP: 56px" runat="server"
AllowCustomPaging="True" AutoGenerateColumns="False" AllowSorting="True">
<Columns>
<asp:TemplateColumn HeaderText="ID">
<ItemTemplate>
<asp:Label id="Label2" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"employeeid") %>'>Label</asp:Label>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn SortExpression="employeeid" HeaderText="EmployeeName">
<ItemTemplate>
<asp:Label id=Label1 runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"TitleOfCourtesy")+"<b>"+DataBinder.Eval(Container.DataItem,"LastName")+"</b>"+DataBinder.Eval(Container.DataItem,"FirstName") %>'>
</asp:Label>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</HTML>
2.代碼
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace Co_112
{
/// <summary>
/// MyTemp 的摘要說明。
/// </summary>
public class MyTemp : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
Display();
}
}
private void Display()
{
string strConn,strCmd;
strConn="server=localhost;uid=sa;pwd=;database=Northwind";
strCmd="Select employeeid,titleofcourtesy,employeeid,firstName,lastName From employees";
SqlDataAdapter oCMD=new SqlDataAdapter(strCmd,strConn);
DataSet oDS=new DataSet();
oCMD.Fill(oDS,"MyList");
DataTable dt=oDS.Tables["MyList"];
DataGrid1.DataSource=oDS.Tables["MyList"];
DataGrid1.DataBind();
Session["MyDataSet"]=oDS;//保存數據集
oDS.Dispose();
oDS=null;
oCMD.Dispose();
oCMD=null;
}
#region Web 窗體設計器生成的代碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
/// </summary>
private void InitializeComponent()
{
this.DataGrid1.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemCreated);
this.DataGrid1.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.DataGrid1_SortCommand);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void DataGrid1_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
string strSortBy=(string)ViewState["SortExpression"];
string strSortAscending=(string)ViewState["SortAscending"];
ViewState["SortExpression"]=e.SortExpression;//記錄排序表達式
//記錄排序標記
if(e.SortExpression==strSortBy)//注意yes和no后的空格
ViewState["SortAscending"]=(strSortAscending=="yes"?"no":"yes");
else
ViewState["SortAscending"]="yes";
UpdateDataView();
}
private void UpdateDataView()
{
DataSet ds=(DataSet)Session["MyDataSet"];
DataView dv=ds.Tables["MyList"].DefaultView;
dv.Sort=(string)ViewState["SortExpression"];
if(ViewState["SortAscending"].ToString()=="no")
dv.Sort+=" DESC";
DataGrid1.DataSource=dv;
DataGrid1.DataBind();
}
private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
ListItemType elemType=e.Item.ItemType;//獲得被創建項的類型
if(elemType==ListItemType.Header)
{
string strSortBy=(string)ViewState["SortExpression"];
string strSortAscending=(string)ViewState["SortAscending"];
string strOrder=(strSortAscending=="yes"?"5":"6");//對于webdings字體,5為向上箭頭,6為向下箭頭
for(int i=0;i<DataGrid1.Columns.Count;i++)
{
if(strSortBy==DataGrid1.Columns[i].SortExpression)
{
//增加一個(升序或降序的)符號
TableCell cell=e.Item.Cells[i];
Label lblSorted=new Label();
lblSorted.Font.Name="webdings";
lblSorted.Font.Size=FontUnit.XSmall;
lblSorted.Text=strOrder;
cell.Controls.Add(lblSorted);
}
}
}
}
}
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