动态创建的控件在回调的时候,将会被清空,所以事件更不能被执行,解决的方法是在LOAD事件里从新加载一次
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;namespace WebApplication1
{
/// <summary>
/// Summary description for WebForm1.
/// </summary> public class WebForm1 : System.Web.UI.Page { protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.DataGrid DataGrid1; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here // string f = @"\\10.1.22.77\test"; // // foreach (string s in System.IO.Directory.GetFiles(f)) // { // Response.Write(s); // Response.Write("<br>"); // } if(Page.IsPostBack) CreateDataGrid(); }
Web Form Designer generated code private void DataGrid1_SelectedIndexChanged(object sender, System.EventArgs e) { } private void Button1_Click(object sender, System.EventArgs e) { CreateDataGrid(); } protected string SortOrder { get { if(ViewState["DataGrid1SortOrder"] == null) { ViewState["DataGrid1SortOrder"] = "ASC"; } return (string) ViewState["DataGrid1SortOrder"]; } set { ViewState["DataGrid1SortOrder"] = value; } } private void DataGrid1_SortCommand(object source, DataGridSortCommandEventArgs e) { DataTable dt=(( (DataGrid)source).DataSource) as DataTable ; string SortField; if(SortOrder == "ASC") { SortField = e.SortExpression + " DESC"; SortOrder = "DESC"; } else { SortField = e.SortExpression + " ASC"; SortOrder = "ASC"; } dt.DefaultView.Sort=SortField; DataGrid1.DataSource=dt; DataGrid1.DataBind(); } private void CreateDataGrid() { DataTable dt=new DataTable (); dt.Columns.Add("ID"); dt.Columns.Add("Name"); for(int i=0;i<10;i++) { DataRow dr=dt.NewRow(); dr[0]=i; dr[1]="Name"+i; dt.Rows.Add(dr); } BoundColumn dcID=new BoundColumn(); dcID.HeaderText="ID"; dcID.DataField="ID"; dcID.SortExpression="ID"; dcID.Visible=true; if(this.DataGrid1.Columns.Count<2) this.DataGrid1.Columns.Add(dcID); DataGrid1.DataSource=dt; DataGrid1.DataBind(); DataGrid1.SortCommand+=new DataGridSortCommandEventHandler(DataGrid1_SortCommand);} }
}
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="WebApplication1.WebForm1" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>WebForm1</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: 232px; POSITION: absolute; TOP: 112px" runat="server" AutoGenerateColumns="False" AllowSorting="True"> <Columns> <asp:BoundColumn DataField="Name" SortExpression="Name" HeaderText="Name "></asp:BoundColumn> </Columns> </asp:DataGrid> <asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 496px; POSITION: absolute; TOP: 128px" runat="server" Text="Button"></asp:Button> </form> </body></HTML>
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