asp.net代码练习 work072

Shun

webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="work072.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
  <title>FileInfo类的示例</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>
    <table border="0">
      <tr>
        <td>
          <asp:Button ID="btnCreateFile" runat="server" Text="创建文件"  />
        </td>
        <td>
          <asp:Button ID="btnWriteFile" runat="server" Text="写入内容"  />
        </td>
        <td>
          <asp:Button ID="btnDeleteFile" runat="server" Text="删除文件"  />
        </td>
      </tr>
    </table>
    <table border="1">
      <tr>
        <td>文件名</td>
        <td>创建时间</td>
        <td>文件大小</td>
        <td>全路径</td>
      </tr>
      <% ListAllFile(); %>
    </table>
  </div>
  </form>
</body>
</html>

webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace work072
{
  public partial class WebForm1 : System.Web.UI.Page
  {
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    /// <summary>
    /// 创建文件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnCreateFile_Click(object sender, EventArgs e)
    {
      string path = Server.MapPath("~");
      for (int i = 0; i < 10; i++)
      {
        System.IO.FileStream stream = System.IO.File.Create(path + (i +1) + ".txt");
        stream.Close();
      }
    }
    /// <summary>
    /// 写入文件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnWriteFile_Click(object sender, EventArgs e)
    {
      string path = Server.MapPath("~");
      System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(path);
      System.IO.FileInfo[] files = dir.GetFiles("*.txt");
      System.IO.StreamWriter writer = null;
      foreach (System.IO.FileInfo f in files)
      {
        writer = f.AppendText();
        //一个汉字占3个字节，一个字母占1个字节，行位符占2个字节
        writer.WriteLine("虾米大王教你学编程系列之ASP.NET中级教程");
        writer.Close();
      }
    }
    /// <summary>
    /// 删除文件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnDeleteFile_Click(object sender, EventArgs e)
    {
      string path = Server.MapPath("~");
      System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(path);
      System.IO.FileInfo[] files = dir.GetFiles("*.txt");
      System.IO.StreamWriter writer = null;
      foreach (System.IO.FileInfo f in files)
      {
        f.Delete();
      }
    }
    /// <summary>
    /// 显示文件信息
    /// </summary>
    protected void ListAllFile()
    { 
      string path = Server.MapPath("~");
      System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(path);
      System.IO.FileInfo[] files = dir.GetFiles("*.txt");
      foreach (System.IO.FileInfo f in files)
      {
        Response.Write("<tr>");
        Response.Write(string.Format("<td>{0}</td>",f.Name));
        Response.Write(string.Format("<td>{0}</td>", f.CreationTime));
        Response.Write(string.Format("<td>{0} 字节</td>", f.Length));
        Response.Write(string.Format("<td>{0}</td>", f.FullName));
        Response.Write("</tr>");
      }
    }
  }
}

[R语言] asp.net代码练习 work072

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