使用Webclient和DownloadFile()获得.txt文件而不是.jpg文件； [英] Get .txt file instead of .jpg - using Webclient and DownloadFile();
本文介绍了使用Webclient和DownloadFile()获得.txt文件而不是.jpg文件；的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
获取.txt文件而不是.jpg-使用Webclient和DownloadFile();
Get .txt file instead of .jpg - using Webclient and DownloadFile();
我正在尝试从以下URL下载.jpg:
I'm trying to download the .jpg from this URL:
使用此代码:
private void TEST_button1_Click(object sender, EventArgs e)
{
WebClient MyDownloader = new WebClient();
MyDownloader.DownloadFile(@"http://1.bp.blogspot.com/_pK6J3MTn5co/S6kuH3aqbeI/AAAAAAAACUY/06axvmjU91k/s1600-h/avengers02_B&W_UL.jpg", @"c:\test.jpg");
}
但是，当我运行此程序时，最终得到一个名为 test.jpg 的文件，其中包含html标记...:
However, when I run this, I end up with a file called test.jpg, which contains html mark up... :
<html>
<head>
<title>avengers02_B&W_UL.jpg (image)</title>
<script type="text/javascript">
<!--
if (top.location != self.location) top.location = self.location;
// -->
</script>
</head>
<body bgcolor="#ffffff" text="#000000">
<img src="http://1.bp.blogspot.com/_pK6J3MTn5co/S6kuH3aqbeI/AAAAAAAACUY/06axvmjU91k/s1600/avengers02_B%26W_UL.jpg" alt="[avengers02_B&W_UL.jpg]" border=0>
</body>
</html>
如何下载实际的.jpg?
How can I download the actual .jpg?
非常感谢您的帮助-谢谢！
Any help is greatly appreciated - thank you!
推荐答案
有一种方法可以做到这一点.首先，您将HTML内容下载到字符串中，然后提取正确的图像URL.然后使用正确的URL下载文件.
There is a way to do it. First you download the HTML content to a string and extract the correct image URL. Then use the correct URL to download the file.
WebClient client = new WebClient();
var path = @"http://1.bp.blogspot.com/_pK6J3MTn5co/S6kuH3aqbeI/AAAAAAAACUY/06axvmjU91k/s1600-h/avengers02_B&W_UL.jpg";
var content = client.DownloadString(path);
System.Text.RegularExpressions.Regex regex = new Regex(@"(?<=<img\s+[^>]*?src=(?<q>['""]))(?<url>.+?)(?=\k<q>)");
var match = regex.Match(content);
if (match.Success)
{
client.DownloadFile(match.Value, @"e:\test1.jpg");
}
这篇关于使用Webclient和DownloadFile()获得.txt文件而不是.jpg文件；的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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