利用ASP.NET的WebClient來Download遠端File
最近看到小舖的一篇討論....
讓小弟產生一個idea,就是透過WebClient來下載遠端的任何檔檔
然後出現下載視窗讓使用者另儲新檔...
這樣在網路看到別人的圖片,Flash就可以下載回來了...(但要注意別侵權喔..)
c#範例
RemoteFileDownload.aspx
01 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="RemoteFileDownload.aspx.cs"
02 Inherits="RemoteFileDownload" %>
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>RemoteFileDownload</title>
08 </head>
09 <body>
10 <form id="form1" runat="server">
11 <div>
12 <asp:Label ID="Label1" runat="server" Text="Url："></asp:Label>
13 <asp:TextBox ID="TextBox1" runat="server" Width="300px">http://www.blueshop.com.tw/images/bs_logo.gif</asp:TextBox>
14 <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="download" /></div>
15 </form>
16 </body>
17 </html>
18
02 Inherits="RemoteFileDownload" %>
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>RemoteFileDownload</title>
08 </head>
09 <body>
10 <form id="form1" runat="server">
11 <div>
12 <asp:Label ID="Label1" runat="server" Text="Url："></asp:Label>
13 <asp:TextBox ID="TextBox1" runat="server" Width="300px">http://www.blueshop.com.tw/images/bs_logo.gif</asp:TextBox>
14 <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="download" /></div>
15 </form>
16 </body>
17 </html>
18
RemoteFileDownload.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;
10
using System.Web.UI.HtmlControls;
11
12public partial class RemoteFileDownload : System.Web.UI.Page
13{
14
protected void Page_Load(object sender, EventArgs e)
15
{
16
17
}
18 protected void Button1_Click(object sender, EventArgs e)
19 {
20 System.Net.WebClient net = new System.Net.WebClient();
21 string link = this.TextBox1.Text;
22 Response.ClearHeaders();
23 Response.Clear();
24 Response.Expires = 0;
25 Response.Buffer = true;
26 Response.AddHeader("Accept-Language", "zh-tw");
27 Response.AddHeader("Content-Disposition", "Attachment;FileName=" + System.Web.HttpUtility.UrlEncode(link, System.Text.Encoding.UTF8));
28 Response.ContentType = "APPLICATION/octet-stream";
29 Response.BinaryWrite(net.DownloadData(link));
30 Response.End();
31 }
32}
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
12
public partial class RemoteFileDownload : System.Web.UI.Page13
{14
protected void Page_Load(object sender, EventArgs e)15
{
16
17
}18
protected void Button1_Click(object sender, EventArgs e)19
{20
System.Net.WebClient net = new System.Net.WebClient();21
string link = this.TextBox1.Text;22
Response.ClearHeaders();23
Response.Clear();24
Response.Expires = 0;25
Response.Buffer = true;26
Response.AddHeader("Accept-Language", "zh-tw");27
Response.AddHeader("Content-Disposition", "Attachment;FileName=" + System.Web.HttpUtility.UrlEncode(link, System.Text.Encoding.UTF8));28
Response.ContentType = "APPLICATION/octet-stream";29
Response.BinaryWrite(net.DownloadData(link));30
Response.End();31
}32
}
