摘要： 首先我很遗憾的告诉大家，因为微软的偷懒，目前UpdatePanel还不支持文件上传。我查了下，有两个办法，我已测试过了，真得很好用。方案一的解决办法就是UpdatePanel中设置PostBackTrigger：<asp:UpdatePanel ID="UpdatePanel1" runat="server"><ContentTemplate><asp:FileUpload ID="FileUpload1" runat="server" /><asp:Button ID=& 阅读全文

摘要： <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataKeyNames="ID" EnableModelValidation="True" Width="589px" PageSize="5" onpageindexchanging="GridView1_PageIndexChangin 阅读全文

摘要： using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO;namespace DeleteAllFiles{ public partial class Form2 : Form { public Form2() { InitializeComponent(); } priv 阅读全文

摘要： AllowUserToAddRows=false; 阅读全文

摘要： [DllImport("kernel32", EntryPoint = "Beep")] public extern static int Beep(int dwfreq,int dwduration);//系统声音 private void Form1_Load(object sender, EventArgs e) { string strHour = DateTime.Now.TimeOfDay.Hours.ToString(); string strMouit = DateTime.Now.TimeOfDay.Minutes.ToString() 阅读全文