这是代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Text.RegularExpressions;
using System.IO;
using unfreez_wrapper;
using Shell32;
namespace DownloadImages
{
public partial class Form1 : Form
{
string f;
string UrlsPath;
int counter;
UnFreezWrapper uf;
string localFilename;
public Form1()
{
InitializeComponent();
uf = new UnFreezWrapper();
counter = 0;
localFilename = @"d:\localpath\";
UrlsPath = @"d:\localpath\Urls\";
using (WebClient client = new WebClient())
{
client.DownloadFile("http://www.sat24.com/foreloop.aspx?type=1&continent=europa#",localFilename + "test.html");
client.DownloadFile("http://www.sat24.com/en/eu?ir=true", localFilename + "test1.html");
}
f = File.ReadAllText(localFilename + "test1.html");
test("image2.ashx", "ir=true");
}
private void test(string firstTag, string lastTag)
{
List<string> imagesUrls = new List<string>();
int startIndex = 0;
int endIndex = 0;
int position = 0;
string startTag = firstTag;//"http://www.niederschlagsradar.de/images.aspx";
string endTag = lastTag;//"cultuur=en-GB&continent=europa";
startIndex = f.IndexOf(startTag);
while (startIndex > 0)
{
endIndex = f.IndexOf(endTag,startIndex);
if (endIndex == -1)
{
break;
}
string t = f.Substring(startIndex, endIndex - startIndex + endTag.Length);
imagesUrls.Add(t);
position = endIndex + endTag.Length;
startIndex = f.IndexOf(startTag,position);
}
string item = imagesUrls[imagesUrls.Count - 1];
imagesUrls.Remove(item);
for (int i = 0; i < imagesUrls.Count; i++)
{
using (WebClient client = new WebClient())
{
client.DownloadFile(imagesUrls[i], UrlsPath + "Image" + counter.ToString("D6"));
}
counter++;
}
List<string> files = Directory.GetFiles(UrlsPath).ToList();
uf.MakeGIF(files, localFilename + "weather", 80, true);
}
首先，我将此 html 下载为 html 文件：
http://www.sat24.com/en/eu?ir=true
有 9 种不同图像/GIF 的动画。我想下载每个 gif 网址。所以在硬盘上我会得到 9 个 gif。
在阅读内容中的文件http://www.sat24.com/en/eu?ir=true时，我看到：
var imageUrls = ["/image2.ashx?region=eu&time=201309162345&ir=true","/image2.ashx?region=eu&time=201309162330&ir=true","/image2.ashx?region=eu&time=201309162315&ir=true","/image2.ashx?region=eu&time=201309162300&ir=true","/image2.ashx?region=eu&time=201309162245&ir=true","/image2.ashx?region=eu&time=201309162230&ir=true","/image2.ashx?region=eu&time=201309162215&ir=true","/image2.ashx?region=eu&time=201309162200&ir=true","/image2.ashx?region=eu&time=201309162145&ir=true"];
在列表中： imagesUrls 我看到这 9 个网址：
例如，这是在索引 0 中： image2.ashx?region=eu&time=201309162345&ir=true 我试过没有 image2.ashx？但在这两种情况下，我都会遇到错误：
client.DownloadFile(imagesUrls[i], UrlsPath + "Image" + counter.ToString("D6"));
ArgumentException 路径中有非法字符
在此之前，当我使用 test.html 和其他两个标签开始和结束时，它可以正常工作。
但现在我使用 test1.html 和这两个标签： test("image2.ashx", "ir=true"); 但得到了例外。
例如，当我拍摄一个图片网址时： image2.ashx?region=eu&time=201309170015&ir=true 并试图在 chrome 中浏览它，但我没有得到任何结果，它试图在 google 中搜索它。
它甚至不是 url 。
这是完整的异常错误：
System.ArgumentException was unhandled
HResult=-2147024809
Message=Illegal characters in path.
Source=mscorlib
StackTrace:
at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional)
at System.Security.Permissions.FileIOPermission.CheckIllegalCharacters(String[] str)
at System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList)
at System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String[] pathList, Boolean checkForDuplicates, Boolean needFullPath)
at System.IO.Path.GetFullPath(String path)
at System.Net.WebClient.GetUri(String path)
at System.Net.WebClient.DownloadFile(String address, String fileName)
at DownloadImages.Form1.test(String firstTag, String lastTag) in d:\C-Sharp\DownloadImages\DownloadImages\DownloadImages\Form1.cs:line 79
at DownloadImages.Form1..ctor() in d:\C-Sharp\DownloadImages\DownloadImages\DownloadImages\Form1.cs:line 45
at DownloadImages.Program.Main() in d:\C-Sharp\DownloadImages\DownloadImages\DownloadImages\Program.cs:line 19
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
那我怎么能从这个网址一张一张地下载图片呢？http://www.sat24.com/en/eu?ir=true
当我使用 test.html 和 startTag "" http://www.niederschlagsradar.de/images.aspx ": 和 endTag: ""cultuur=en-GB&continent=europa"" 时效果很好！
但是现在使用 test1.html 和两个不同的标签它不起作用。