如何使用.NET中的HTTPClient而不是WebClient下载Excel文件？

发布于 2025-01-27 20:58:36 字数 251 浏览 4 评论 0原文

我有以下代码

private void SaveFile(string linkToFile, string filename)
{
    using WebClient client = new();
    client.DownloadFile(linkToFile, ResourcePath + filename);
}

，所以我的问题是，如何使用httpclient而不是WebClient下载Excel文件？

原文

I have the following code

private void SaveFile(string linkToFile, string filename)
{
    using WebClient client = new();
    client.DownloadFile(linkToFile, ResourcePath + filename);
}

So my question is, how can I download Excel file with HttpClient instead of WebClient?

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为你拒绝所有暧昧 2025-02-03 20:58:36

httpclient上的文档的最佳来源当然是Microsoft网站本身：
https：// https://learlearn.microsoft.com/en-en-us /dotnet/api/system.net.http.httpclient
这是我用于下载电子表格的代码的（过于简单的）版本：

private async Task SaveFile(string fileUrl, string pathToSave)
{
    // See https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient
    // for why, in the real world, you want to use a shared instance of HttpClient
    // rather than creating a new one for each request
    var httpClient = new HttpClient();
    
    var httpResult = await httpClient.GetAsync(fileUrl);
    using var resultStream = await httpResult.Content.ReadAsStreamAsync();
    using var fileStream = File.Create(pathToSave);
    resultStream.CopyTo(fileStream);
}

The best source of documentation on HttpClient is, of course, the Microsoft site itself:
https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient
Here's an (oversimplified) version of the code I use for downloading spreadsheets:

private async Task SaveFile(string fileUrl, string pathToSave)
{
    // See https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient
    // for why, in the real world, you want to use a shared instance of HttpClient
    // rather than creating a new one for each request
    var httpClient = new HttpClient();
    
    var httpResult = await httpClient.GetAsync(fileUrl);
    using var resultStream = await httpResult.Content.ReadAsStreamAsync();
    using var fileStream = File.Create(pathToSave);
    resultStream.CopyTo(fileStream);
}

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