在Windows C＃应用程序中下载文件

问题描述：

任何人都可以帮助或协助我这个，

我想下载一个Windows C＃应用程序中的文件（可能是PDF）。该文件位于应用程序的EXE可用的文件夹中。如何在不使用FTP或webclient等的情况下做到这一点...

先谢谢

Hi,

Can anyone help or assist me for this,

I want download a file(may be a PDF) in a windows C# application. The file is available in a folder where the application's EXE is available. how to do that without the use of FTP or webclient etc...

Thanks in Advance

答

如果这是一个Windows应用程序，并且该文件已经在应用程序exe目录中，则不需要下载它 - EXE可以读取该文件，因此它可以使用 File.Copy [ ^ ]将其复制到一个新的位置，或者将其作为字节读取，并将其写回到它的新文件夹。

为什么你认为这是一个下载？

If this is a windows application, and the file is already in the application exe directory, they you don't need to download it - the EXE can read the file, so it can either use File.Copy[^] to copy it to a new location, or read it as bytes, and write it back to it's new folder.

Why would you think of this as a download?

private void DownloadFile()
       {

           wc.DownloadProgressChanged += WcOnDownloadProgressChanged;
           wc.DownloadFileCompleted += WcOnDownloadFileCompleted;
           string downloadUrl = ConfigurationSettings.AppSettings["fileDownloadPath"] ;


           wc.DownloadFileAsync(new Uri(downloadUrl), @"C:\\fileName" );
           handle.WaitOne(); // wait for the async event to complete

       }

       private void WcOnDownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
       {
           if (!e.Cancelled && e.Error == null)
           {
               //async download completed successfully

           }
           handle.Set(); // in both the case let the void main() know that async event had finished so that i can quit
       }

       private void WcOnDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
       {
           // handle the progres in case of async
           //e.ProgressPercentage

       }
       private void butsync_Click(object sender, EventArgs e)
       {
           DownloadFile();
}

在Windows C＃应用程序中下载文件

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