下载包含无效字符的URL文件 [英] Download URL file with invalid characters

问题描述

我在c＃windows窗体应用程序中使用以下代码来下载URL文件。

 System.Net.WebClient webClient = new System。 Net.WebClient（）; 
 webClient.DownloadString（sourceFile）; 
 //开始下载并复制文件
 webClient.DownloadFileAsync（new Uri（sourceFile），destinationFilePath）; 

但是当我使用时这样的网址无法下载。任何错误也不会到来。其他网址文件下载得很好。

http://www.archicadwiki.com/DWG/Import/LayerVisibilityOnLayout?action=AttachFile&do=get&target=AC10-DWG.png

解决方案

我用目的文件"c：\\ test.png"尝试了你的代码。并有同样的问题。删除DownloadFileAsync调用的Async部分可以让您检查出现了什么问题。在我的情况下，我在c：\test.png上获得了拒绝访问权限。当我尝试在其他地方保存图像
时，正常和异步调用都有效。

代码我用来检查你的代码：

< pre class ="prettyprint"> string sourceFile =" http：//www.archicadwiki.com/DWG/Import/LayerVisibilityOnLayout？action = AttachFile& do = get& target = AC10-DWG.png" ;;
System.Net.WebClient webClient = new System.Net.WebClient（）;
webClient.DownloadString（sourceFile）;
webClient.DownloadFileAsync（new Uri（sourceFile），" d：\\ test.png"）;

希望这有帮助

I'm using following code in my c# windows form application to download a URL file.

System.Net.WebClient webClient = new System.Net.WebClient();
webClient.DownloadString(sourceFile);
// Start the download and copy the file  
webClient.DownloadFileAsync(new Uri(sourceFile), destinationFilePath);

But when I'm using a url like this it doesn't get downloaded. Any error also not coming. Other url files getting downloaded well.

http://www.archicadwiki.com/DWG/Import/LayerVisibilityOnLayout?action=AttachFile&do=get&target=AC10-DWG.png

解决方案

Hi,

I tried your code with a destinationfile "c:\\test.png" and had the same issue. Removing the Async part of the DownloadFileAsync call gives you a way to check what's going wrong. In my case I got an access denied on c:\test.png. When I tried saving the image somewhere else, both the normal and the Async call worked.

Code I used to check your code:

string sourceFile = "http://www.archicadwiki.com/DWG/Import/LayerVisibilityOnLayout?action=AttachFile&do=get&target=AC10-DWG.png";
System.Net.WebClient webClient = new System.Net.WebClient();
webClient.DownloadString(sourceFile);
webClient.DownloadFileAsync(new Uri(sourceFile), "d:\\test.png");

Hope this helps

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