WebClient 如何自动添加文件夹? [英] How can the WebClient automatically add folders?

问题描述

WebClient webClient = new WebClient();
webClient.DownloadFileAsync(new Uri(urlDownload), @"C:\Files\Test\Folder\test.txt");

如果我想将 test.txt 文件保存到文件夹中，WebClient 只会在我创建这些文件夹时保存文件 (Files\Test\Folder) 之前.但是，例如，我没有创建文件夹 Test，Webclient 不保存任何内容.

If I want to save the test.txt file to the folder, the WebClient saves the file only, when I have created these folders (Files\Test\Folder) before. I have however for example the folder Test not created, the Webclient saves nothing.

如何自动添加文件夹?

推荐答案

您需要先检查所需文件夹是否已经存在，然后创建它，然后开始下载文件:

You would need to check first if the required folder does not exists already, then create it and after that start downloading of the file:

string path = "@C:\Files\Test\Folder";
string filePath = path +"\\test.txt";
if (!Directory.Exists(path))
{
   Directory.CreateDirectory(path);
}
WebClient webClient = new WebClient();
webClient.DownloadFileAsync(new Uri(urlDownload),filePath);

更好的是创建一个方法:

more better is to create a method:

private void CreateFolder(string path)
{
    if (!Directory.Exists(path))
    {
         Directory.CreateDirectory(path);
    }
}

并调用它:

string path = "@C:\Files\Test\Folder";
string filePath = path +"\\test.txt";
CreateFolder(path);
WebClient webClient = new WebClient();
webClient.DownloadFileAsync(new Uri(urlDownload),filePath);

这篇关于WebClient 如何自动添加文件夹?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！