一个Web客户端请求&QUOT期间“发生异常;而使用C＃ASP.NET [英] 'An exception occurred during a WebClient request" while using C# ASP.NET

问题描述

所以，我已经建立了一个自动更新程序，以我的程序。

So, I have built an auto update program to my program.

这是在这里运行的代码是：

The code that is running in here is:

new WebClient().DownloadFile("XXXX", checkingfolder.SelectedPath);

的

XXX是我的web服务器运行在Verio的一个VPS服务器，与最新的IIS和一切。

the XXX is my webserver that is running as a VPS server in verio, with the newest IIS and everything.

在下载按钮，用户点击，它说：

When the user clicks on the download button, it says:

'An exception occurred during a WebClient request.

的事情是，我不知道为什么 - 我只是做尝试捕捉。这里

The thing is, that I dont even know why - i am just doing try catch.

任何人有任何想法，为什么发生这种情况的任何帮助你能给我吗？

Anyone here have any idea why this happened?

谢谢，你有不知道有多少你在这里帮我 - ！再次感谢

Thanks for any help you will give me, you have no idea how much you are helping me here - thanks again !

推荐答案

我可以重现这一点，如果我指定，为的似乎的是在你的榜样的情况下，文件夹的名称，而不是文件命名的目的地。 。供应的文件名称，而不是

I can reproduce this if I specify, as seems to be the case in your example, a folder name rather than a file name the destination. Supply a file name instead.

顺便说一句;如果我看的InnerException ，它告诉我，这个问题涉及文件路径：

As an aside; if I look at the InnerException, it tells me that the problem relates to the file path:

using(var client = new WebClient())
{
    try
    {
        client.DownloadFile(
            "http://stackoverflow.com/questions/8033619/an-exception-occurred-durning-a-webclient-request-c-sharp-asp-net/8033687#8033687",
            @"j:\MyPath");
    }
    catch (Exception ex)
    {
        while (ex != null)
        {
            Console.WriteLine(ex.Message);
            ex = ex.InnerException;
        }
    }
}

其中给出：

Which gives:

An exception occurred during a WebClient request.
Access to the path 'j:\MyPath' is denied.

如果我将其更改为文件，它工作正常：

If I change it to a file, it works fine:

client.DownloadFile(
    "http://stackoverflow.com/questions/8033619/an-exception-occurred-durning-a-webclient-request-c-sharp-asp-net/8033687#8033687",
    @"j:\MyPath\a.html");

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