網路上有一個有名的snap shots的網站,主要是提供blog外掛超連結預覽的功能
小弟就去網路上找了一下資料,如何利用ASP.NET達到這個功能..
其實主要透過一支win的程式(IECapt)來取得url的畫面就可以做到了...
當然在抓取url的畫面前,可以先用WebRequest的GetResponse來判斷此url是否正常...c#範例
網路上有一個有名的snap shots的網站,主要是提供blog外掛超連結預覽的功能
小弟就去網路上找了一下資料,如何利用ASP.NET達到這個功能..
其實主要透過一支win的程式(IECapt)來取得url的畫面就可以做到了...
當然在抓取url的畫面前,可以先用WebRequest的GetResponse來判斷此url是否正常...c#範例
IECapt.aspx
1: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="IECapt.aspx.cs" Inherits="IECapt" %>
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>IECapt</title>
8: </head>
9: <body>
10: <form id="form1" runat="server">
11: <div>
12: <asp:TextBox ID="TextBox1" runat="server" Width="300px">http://blog.blueshop.com.tw/hent/</asp:TextBox>
13: <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="取得畫面" />
14: <br />
15: <asp:Image ID="Image1" runat="server" /></div>
16: </form>
17: </body>
18: </html>
IECapt.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.Diagnostics;
12: using System.Net;
13:
14: public partial class IECapt : System.Web.UI.Page
15: {
16: //IECapt下載網址,下載後請放在跟此檔案相同位置
17: //http://iecapt.sourceforge.net/
18: protected void Page_Load(object sender, EventArgs e)
19: {
20:
21: }
22: protected void Button1_Click(object sender, EventArgs e)
23: {
24: string URL = this.TextBox1.Text;
25: bool Ok = true;//預設URL的狀態是正常的
26: WebRequest request = WebRequest.Create(URL);
27: request.Proxy = null;
28: try
29: {
30: HttpWebResponse response = (HttpWebResponse)request.GetResponse();
31: Response.Write("\n Site Exists.");
32: }
33: catch (Exception exc)
34: {
35: Response.Write("\n Site does not exists.");
36: Ok = false;
37: }
38:
39: //URL是正常運作,才抓取URL畫面
40: if (Ok != false)
41: {
42: Process proc = new Process();
43:
44: //IECapt.exe path
45: proc.StartInfo.FileName = Server.MapPath("~/IECapt.exe");
46:
47: //將取得的畫面暫存為image.png檔
48: proc.StartInfo.Arguments = this.TextBox1.Text + " " + Server.MapPath("~/image.png");
49: proc.Start();
50:
51: //等待IECapt程式執行完畢
52: proc.WaitForExit();
53:
54: this.Image1.ImageUrl = "image.png";
55: }
56:
57: }
58: }
執行結果：
原始程式碼：IECapt.rar
參考網址：
http://iecapt.sourceforge.net/
http://www.csharpfriends.com/Forums/ShowPost.aspx?PostID=47537
http://www.snap.com/snapshots.php