利用ASP.NET的Directory.GetFiles來取得特定副檔名,並結合ArrayList將檔案資訊綁定到GridView裡

2008-03-02

37137
0
ASP.NET(Collections)
2008-03-04

最近又在小舖看到有關這方面的問題...
此範例主要的功能就是利用Directory.GetFiles將某個目錄裡的特定副檔名檔案取出放置在arraylist裡..
並且將arraylist與gridview結合...列出檔案的所有資訊....
再加上一個DropDownList來選擇圖片檔案,並顯示此圖片......c#範例...

DirectoryFileFilter.aspx

   1:  <%@ Page Language="C#" AutoEventWireup="true" CodeFile="DirectoryFileFilter.aspx.cs" Inherits="DirectoryFileFilter" %>

2:

   3:  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

4:

   5:  <html xmlns="http://www.w3.org/1999/xhtml" >

   6:  <head runat="server">

   7:      <title>DirectoryFileFilter</title>

   8:  </head>

   9:  <body>

  10:      <form id="form1" runat="server">

  11:      <div>

  12:          <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">

  13:          </asp:DropDownList>

  14:          <br />

  15:          <asp:GridView ID="GridView1" runat="server">

  16:          </asp:GridView>

  17:          <asp:Image ID="Image1" runat="server" /></div>

  18:      </form>

  19:  </body>

  20:  </html>

DirectoryFileFilter.aspx.cs

   1:  using System;

   2:  using System.Data;

   3:  using System.Configuration;

   4:  using System.Collections;

   5:  using System.Web;

   6:  using System.Web.Security;

   7:  using System.Web.UI;

   8:  using System.Web.UI.WebControls;

   9:  using System.Web.UI.WebControls.WebParts;

  10:  using System.Web.UI.HtmlControls;

  11:  using System.IO;

12:

  13:  public partial class DirectoryFileFilter : System.Web.UI.Page

  14:  {

  15:      protected void Page_Load(object sender, EventArgs e)

  16:      {

  17:          if (!IsPostBack)

  18:          {

  19:              ArrayList fileArray = new ArrayList();

  20:              FileInfo info;

  21:              string[] files;

22:

  23:              //指定根目錄,取出所以副檔名為jpg的檔案清單

  24:              files = Directory.GetFiles(Server.MapPath("~/"), "*.jpg");

25:

  26:              //將每一個檔案資訊加入ArrayList裡

  27:              foreach (string item in files)

  28:              {

  29:                  info = new FileInfo(item);

  30:                  fileArray.Add(info);

31:

  32:                  //將檔案資訊加入DropDownList

  33:                  this.DropDownList1.Items.Add(new ListItem(info.Name));

34:

  35:              }

36:

  37:              this.GridView1.DataSource = fileArray;

  38:              this.GridView1.DataBind();

  39:          }

  40:      }

  41:      protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

  42:      {

  43:          this.Image1.ImageUrl = this.DropDownList1.SelectedValue;

  44:      }

  45:  }

執行結果：

參考來源：ASP.NET Directory Lister

原始程式碼：DirectoryFileFilter.rar

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