C# WebClient下载文件到绝对路径

Question

I'm working with ASP.NET Core and try to download a file to an absolute path.

But the problem I have is that the file always gets downloaded to the project directory and the filename itself gets the name of the whole path.

My Code:

string path = @"C:\Users\User\file.txt";
string url = "https://example.com/file.txt";
using (var client = new WebClient())
{
    client.DownloadFile(url, path);
}

With this code the file gets then saved in the project folder with the file name C:\Users\User\file.txt , instead of being saved in the directory C:\Users\User with the file name file.txt .

The backslashes and the colon get replaced with some special characters, because they are not allowed in the filename.

Answer 1

Update

This worked for me:

using (WebClient client = new WebClient()) {
    client.DownloadFile("https://localhost:5001/", @"D:\file.html");
}

According to this and other answers , your absolute path should work. Are you certain your path is formatted correctly and the destination folder exists?

Original Answer

Use this if all else fails, since saving to a valid folder should work.

WebClient.DownloadFile will download to the location of the current application (specified by Application.Startup ) for a relative path. From the docs :

Parameters

address Uri
The URI specified as a String, from which to download data.

fileName String
The name of the local file that is to receive the data.

If you are going to use WebClient , you will need to move the file after you have downloaded it, eg

// Download to a local file.
using (var client = new WebClient())
{
    client.DownloadFile(url, fileName);
}

// Get the full path of the download and the destination folder.
string fromPath = Path.Combine(Application.StartupPath, fileName);
string toPath = Path.Combine(destinationFolder, fileName);

// Move the file.
File.Move(fromPath, toPath);