Hi Carlos ,

     Here I have only one button ,i need to upload directly using that button

thanks i have doubt , how does user can upload another document using the same widget that has been hidden

You can upload one document at a time when clicking on upload button. The onChange from the upload widget is triggered and in the handler you manage the file content and the filename that you upload from your system.  

In that oml, the files are added into a list that is presented in the screen.

thank you lot ,iam getting your point and i will try it now

user need to upload a file by clicking same upload for all four documents thats required

That's certainly possible with some minor tweaks. And that can allow uploading 1 (at a time) or multiple files (all in one go) depending on how you want it to behave. All well upto this stage.

Now, how is the software supposed to know the files the user has uploaded goes against which label? I assume you want to categorise each of these files into one of the labels mentioned on the left.

Is there any instructions you want to put in place? Like first upload only "Outstanding letters" document, nothing else. Then on next click "upload quotation from the car dealer."

What's the plan around managing that requirement?

you are correct ,that i need to upload one by one file 
1)While i click on first check box it must be grey color and i click upload button ,when upload is done the check box color must be on yellow ,its mention that file uploaded.
2)its an same process for other 3 check box also ,i need to upload all document one by one by clicking check box and upload

Hi Kirubhakaran,

You can use this forge component to start with

https://www.outsystems.com/forge/component-overview/200/multiple-file-upload

This allows multiple or single file uploads.

Install its demo application also, then open the demo application and click on "Only upload button" option from the browser.

This way you will be able to implement and solve your requirement for single upload button. Now before the upload starts, you add the logic for configuring the checkbox. If the user has not selected any checkbox, keep the upload button disabled.

Once a checkbox is clicked, allow uploading. Once the user uploads and is finished, you can associate that new document to the recently checked document item. After associating it with that item, turn it into green colour with some sort of status management (or using a boolean variable or a structure).

Then the user should be able to select another document.