路径错误c中的非法字符＃

-1

我试图从以下链接下载csv文件，但在最后一行引发异常“路径错误中的非法字符”。我相信这是链接中的问号标志，会弄乱一切，但我必须得到它的工作..任何建议？路径错误c中的非法字符＃

string remoteUri = "download.finance.yahoo.com/d/quotes.csv?s=%40%5EDJI,aapl&f=o&e=.csv"; 
string fileName = "aapl.csv", myStringWebResource = null; 
// Create a new WebClient instance. 
WebClient myWebClient = new WebClient(); 
// Concatenate the domain with the Web resource filename. 
myStringWebResource = remoteUri + fileName; 
// Download the Web resource and save it into the current filesystem folder. 
myWebClient.DownloadFile(myStringWebResource, fileName);

来源

2015-09-25 Ofer Gozlan

你可以可以只用其他字符替换问号...... –

问题标记是有效的url字符。 –

此链接可能会有帮助：http://stackoverflow.com/questions/146134/how-to-remove-illegal-characters-from-path-and-filenames –

确定。让我们看看你的代码。

// Dont forget the "http://". A lot of browser add it themselves but the WebClient doesnt. 
string remoteUri = "download.finance.yahoo.com/d/quotes.csv?s=%40%5EDJI,aapl&f=o&e=.csv"; 

// I recommend to take the habitude to write each one in one line. 
string fileName = "aapl.csv", myStringWebResource = null; 

// Use the "using" keyword to dispose WebClient 
WebClient myWebClient = new WebClient(); 

// Why are you doing this? Your url is working without. No need to concat here. 
myStringWebResource = remoteUri + fileName; 

// Download the Web resource and save it into the current filesystem folder. 
myWebClient.DownloadFile(myStringWebResource, fileName);

解决方案进行测试：（上.NETFiddle演示）

using System; 
using System.Net; 

public class Program 
{ 
    public void Main() 
    { 
     string remoteUri = "http://download.finance.yahoo.com/d/quotes.csv?s=%40%5EDJI,aapl&f=o&e=.csv"; 

     using (var myWebClient = new WebClient()) 
     { 
      string csv = myWebClient.DownloadString(remoteUri); 
      Console.WriteLine(csv); 
     } 
    } 
}

解决问题的方法：

using System; 
using System.Net; 

public class Program 
{ 
    public void Main() 
    { 
     string remoteUri = "http://download.finance.yahoo.com/d/quotes.csv?s=%40%5EDJI,aapl&f=o&e=.csv"; 
     string fileName = "aapl.csv"; 

     using (var myWebClient = new WebClient()) 
     { 
      myWebClient.DownloadFile(remoteUri, fileName); 
     } 
    } 
}

来源

2015-09-25 15:21:25 aloisdg

非常感谢你！ –

欢迎您:) – aloisdg

这工作：

string remoteUri = @"http://download.finance.yahoo.com/d/quotes.csv?s=%40%5EDJI,aapl&f=o&e=.csv"; 
string fileName = @"c:\aapl.csv"; 

// Create a new WebClient instance. 
WebClient myWebClient = new WebClient();  

// Download the Web resource and save it into the current filesystem folder. 
myWebClient.DownloadFile(remoteUri, fileName);

来源

2015-09-25 15:18:23

不要忘记处理WebClient。看到我的答案。 – aloisdg

路径错误c中的非法字符＃

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