[Urgent help] How can I use a program to implement external submission? For File Upload programs implemented using asp... Intranet Program

[Problem description]
A good friend's company wants him to handle such a business: He constantly uploads files to the server through an asp program on the Intranet (only the server address is known, but the database storage address and type are unknown), each upload also input a few other information. Put the uploaded file in a directory. (The following upload page is saved back to the static page: http://files.cnblogs.com/lxinxuan/faxfileupdatebycrm.rar)
The upload interface is as follows:

[Friend troubles]
This program can only submit one file at a time, which is cumbersome. Therefore, if you want to write a program and batch upload tools, you only need to implement this function.

[My analysis]
Since you cannot know the data storage address, database type, and address, you can only submit the data on an external simulated page.
I used to refer to an article by Roping elder brother: ASP. Net casually _ implementing external WEB form submission. I wanted to upload the WEB form. Unfortunately, this step is always not working properly.
Because I haven't paid much attention to asp for a long time, I came to the garden to ask for help.

[Daren instructions]
...... This is for your reference. Thank you.