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
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;
03using System.Configuration;
04using System.Collections;
05using System.Web;
06using System.Web.Security;
07using System.Web.UI;
08using System.Web.UI.WebControls;
09using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11
using System.IO;
12
13public 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}
using System;
using 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.Page14
{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