When writing a web project, SmartUpload is used for file upload and new string () is used for transcoding, but in the database, there will still be random codes similar to poker

The phenomenon and background of the problem

Writing web When the project is , File upload uses smartupload, It was used new string() Transcoding , But in the database , There will still be chaos like poker

Problem related code , Do not paste screenshots

Operation results and error reporting contents

My solution ideas and tried methods

What I want to achieve

So I want to ask what is a better solution , Or there is smartupload Is there an updated version of , Can solve garbled code