📄 排序列(单个字段).txt
字号:
只支持单个字段，自动反向,没有顺序
1.页面文件
<%@ Page language="c#" Codebehind="MySortGrid.aspx.cs" AutoEventWireup="false" Inherits="Co_112.MySortGrid" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>MySortGrid</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:datagrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 72px; POSITION: absolute; TOP: 80px" runat="server"
AutoGenerateColumns="False" AllowSorting="True">
<Columns>
<asp:BoundColumn DataField="employeeid" HeaderText="ID"></asp:BoundColumn>
<asp:BoundColumn DataField="firstname" HeaderText="FirstName"></asp:BoundColumn>
<asp:BoundColumn DataField="lastname" HeaderText="LastName"></asp:BoundColumn>
<asp:BoundColumn DataField="Country" SortExpression="employeeid" HeaderText="Country"></asp:BoundColumn>
</Columns>
</asp:datagrid></form>
</body>
</HTML>
2.代码文件
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>
/// MySortGrid 的摘要说明。
/// </summary>
public class MySortGrid : 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,firstName,lastName,country 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;//保存数据集
oDS.Dispose();
oDS=null;
oCMD.Dispose();
oCMD=null;
}
#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.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;//记录排序表达式
//记录排序标记
if(e.SortExpression==strSortBy)//注意yes和no后的空格
ViewState["SortAscending"]=(strSortAscending=="yes"?"no":"yes");
else
ViewState["SortAscending"]="yes";
UpdateDataView();
}
//重新排序
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;//获得被创建项的类型
if(elemType==ListItemType.Header)
{
string strSortBy=(string)ViewState["SortExpression"];
string strSortAscending=(string)ViewState["SortAscending"];
string strOrder=(strSortAscending=="yes"?"5":"6");//对于webdings字体,5为向上箭头,6为向下箭头
for(int i=0;i<DataGrid1.Columns.Count;i++)
{
if(strSortBy==DataGrid1.Columns[i].SortExpression)
{
//增加一个(升序或降序的)符号
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);
}
}
}
}
}
}⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -