问题
I want to download a file from the website: http://www.trademap.org/Country_SelProduct_TS.aspx?nvpm=1|||||TOTAL|||2|1|1|1|2|1|2|1|1 no filename and extension in the URL. on webpage, excel icon (up-left) has to be on-clicked and then the browser savedfiledialog opens. how to automate this and save the file in pc without browser, from vb.net? can it be done by webclient.downloadfile? thanks
来源：https://stackoverflow.com/questions/46457912/how-to-download-xls-file-from-website-without-file-name-and-extension-in-url