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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

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

01 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="DirectoryFileFilter.aspx.cs"
02     Inherits="DirectoryFileFilter" %>
03
04 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
05 <html xmlns="http://www.w3.org/1999/xhtml">
06 <head id="Head1" runat="server">
07     <title>DirectoryFileFilter</title>
08 </head>
09 <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>
21


DirectoryFileFilter.aspx.cs

01 using System;
02 using System.Data;
03 using System.Configuration;
04 using System.Collections;
05 using System.Web;
06 using System.Web.Security;
07 using System.Web.UI;
08 using System.Web.UI.WebControls;
09 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：http://authors.aspalliance.com/stevesmith/articles/directorylist.asp

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2008/3/16 23:43| 閱讀數 : 882 | 我要推薦 | Add Comment | 文章分類 : ASP.NET 訂閱

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