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WebForms scrolling bug with large form data

I am testing some forms that are sent via POST multipart/form-data request to a server. I am using the Inspectors/WebForms tab and can see the form data however some of the Names have very long Values content. In particular I have one Value that is 4 paragraphs or 350 words. I want to be able to scroll down to read the data but it scrolls right to the end. There's like a dead zone where scrolling doesn't work.

I have attached an animated GIF demonstrating the issue. Note Fiddler's WebForms says multipart/form-data is not fully supported, and so this issue may have to do with that.




  • Guest
  • Apr 5 2018
  • Under review
  • Attach files
  • Guest commented
    10 Apr, 2018 10:16pm

    I'm using a large font size 10 (up from default 8.25 I think) and a higher display DPI 125%. I tried in a VM where both are normal size (8.25 and 100%) with Fiddler [Mar-20-18] v5.0.20181.14850 but I have the same issue. A little more text is visible with the smaller font size so I can see the first few words in the second paragraph but overall the effect is the same.

  • Eric Lawrence commented
    6 Apr, 2018 12:52pm

    This is related to an underlying problem in the WinForms UI control, not a limitation of the form-data parser.

    Does the problem still occur if you're using default font sizes (the screenshot's mixed sizes suggest that the zoom is not default, or this is a high-DPI system where font rendering in general is a mess...)