【C#】【HttpClient】下载网络文件

WebClient 参考：https://blog.csdn.net/qq_34739157/article/details/125373179

 

HttpClient 参考（WebClient已经过时了）：https://blog.csdn.net/qq_33033813/article/details/104919431?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-104919431-blog-124631842.235^v29^pc_relevant_default_base3&spm=1001.2101.3001.4242.1&utm_relevant_index=3

 

以上方法只能下载到服务器上，不能下载到本地

Blazor-JS调用方法下载到本地下载文件夹

1、razor页面：@inject IJSRuntime JS

-------------------------------------code start------------------------------------

byte[] fileBytes = File.ReadAllBytes(tempfilename);
var fileStream = new MemoryStream(fileBytes);
using var streamRef = new DotNetStreamReference(stream: fileStream);

await JS.InvokeVoidAsync("downloadFileFromStream", downFileName, streamRef);

-------------------------------------code end------------------------------------

tempfilename：需要下载的文件地址，例如：“C:\123\download\销售合同模版.xlsx”

downFileName：文件名，例如：“销售合同.xlsx”

streamRef：DotNetStreamReference 数据流