如何捕获 Webclient 的任何错误？

发布于 2024-10-23 01:06:42 字数 326 浏览 2 评论 0原文

我试图捕获使用 WebClient 时的连接问题。例如，无法访问、超时等。下面的代码不起作用，就好像没有任何问题一样。

WebClient wc = new WebClient();
try
{
    wc.UploadFileAsync(new Uri(@"ftp://tabletijam/FileServer/upload.bin"), Directory.GetCurrentDirectory() + @"\crypto.bin");
}
catch (System.Exception ex)
{
    MessageBox.Show(ex.ToString());
}

原文

Im trying to capture connection problem when using WebClient. Example, unreachable, timeout etc. Code belows doesnt work, as if there is nothing wrong.

WebClient wc = new WebClient();
try
{
    wc.UploadFileAsync(new Uri(@"ftp://tabletijam/FileServer/upload.bin"), Directory.GetCurrentDirectory() + @"\crypto.bin");
}
catch (System.Exception ex)
{
    MessageBox.Show(ex.ToString());
}

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输什么也不输骨气 2024-10-30 01:06:42

您正在使用的代码仅发送文件...您需要实现异步部分。

WebClient webClient = new WebClient();
webClient.UploadFileAsync(address, fileName);
webClient.UploadProgressChanged += WebClientUploadProgressChanged;
webClient.UploadFileCompleted += WebClientUploadCompleted;

...

void WebClientUploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
{
     Console.WriteLine("Download {0}% complete. ", e.ProgressPercentage);
}
void WebClientUploadCompleted(object sender, UploadFileCompletedEventArgs e)
{
    // The upload is finished, clean up
}

The code you are using, just sends the file ... you need to implement the Async part.

WebClient webClient = new WebClient();
webClient.UploadFileAsync(address, fileName);
webClient.UploadProgressChanged += WebClientUploadProgressChanged;
webClient.UploadFileCompleted += WebClientUploadCompleted;

...

void WebClientUploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
{
     Console.WriteLine("Download {0}% complete. ", e.ProgressPercentage);
}
void WebClientUploadCompleted(object sender, UploadFileCompletedEventArgs e)
{
    // The upload is finished, clean up
}

回复收藏 0 原文

一袭水袖舞倾城 2024-10-30 01:06:42

try
{
    // trying to make any operation on a file
}
catch (IOException error)
{
    if(error is FileNotFoundException)
    {
        // Handle this error
    }
}

使用此代码但适合您的场景

try
{
    // trying to make any operation on a file
}
catch (IOException error)
{
    if(error is FileNotFoundException)
    {
        // Handle this error
    }
}

use this code but with your scenario

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~没有更多了~