I'm not exactly certain how this would work.

I added a second FIleUpload control to the page and set this one to call the Javascript client function (I tried FileSelected, FileUploading, and FileUploaded)

In that function I have it read the dropdown lists and radio buttons and it does capture the correct info.  I then have it do a page postback.  But by the time it gets to the Server-Side fileUploading handler the controls are back to their default values again.  

I need to read the file in as a memory stream, convert that to a string, process it, and then insert the results into a database.  I can't do all of that through javascript, so at some point I need to run the server-side code to actually process the file, and I need to process it differently depending on what options were selected by the user.

Hello ,

For Your reference I have created a sample application of webUpload using version 16.2.
In the sample I am using ‘FileUploaded’ client side event to make a post back by button click.
On button click you can find the updated value of all the controls.

Your code would be like this :

protected void btnClick_Click(object sender, EventArgs e)
    {
        var dd1= WebDropDown1.SelectedValue ;
        var text = txtTest.Text;

        string c = string.Empty;

        if (rbtnActivity.Checked)
        {
            c = rbtnActivity.Text;
        }
        else if (rbtnDegree.Checked)
        {
            c = rbtnDegree.Text;
        }
        else if (rbtnMajor.Checked)
        {
            c = rbtnMajor.Text;
        }
        else {
            c = "No Radio button selected";
        }

       }

Please find the attachment and let me know if you need further assistance.

Thank you for the sample project.  

I can in fact read the controls in the this button click event, which is great, but I do not have access to the FileStream data at this point.  I am trying to save the file as a Stream, process it, and update database values without having to write out a physical file on the server, then read that, and then delete it.

So in Button click I can read the control values but not the FileStream, in UploadFinishing I can get the FileStream but cannot read the controls.  How can I do both?