Windows Forms DPI scaling

13
votes

enter image description here

My application looks good with 100% DPI setting, but when user selects different (125% or 150%) words don't fit in containers. I tried to fix this with solution I found here: Detect windows font size (100%, 125%, 150%) which is:

this.AutoScaleMode = AutoScaleMode.Dpi;

It fixed 150% setting (made it a little blur, but that's ok), unfortunately it didn't make the same for 125% which is being used on the PC the app is intended to run.

Is there some easy fix to this or do I have to rearrange every form manually?

1
c#winformsdpi
See stackoverflow.com/questions/4075802/… – stuartd
At 150%, Windows takes over the scaling and will let your window draw itself into a bitmap. It then renders that bitmap to the screen, rescaling it to make it bigger. Yes, that looks fuzzy, you have to declare yourself dpiAware to stop that. You are definitely not DPI aware however, you somehow stopped the controls from properly rescaling themselves. Like they normally do, a screenshot is never a good way to show a coding problem. Might have something to do with the form's Font property, don't assign it. – Hans Passant
@HansPassant I changed font size in form to 12, is this causing problems? – Bartosz Karpiński

1 Answers

11
votes

Creating a DPI-Aware Application

All containers must use the same AutoScaleMode - this part fixed my problem

It is required that windows app should have same layout at different resolutions means there should be no effect on layout of app on changing resolution. Here are the steps to do this.

  1. Use table layout panel
  2. Drag control in cell of tablelayoutpanel and set anchor and dock property.
  3. Set rowspan and colspan properties of dragged control to merge cells
  4. Set margin and padding of dragged control with respect to cell.
  5. drag all controls and follow same steps, complete design using tablelayoutpanel
  6. Now set all columns and rows size of tablelayoutpanel = autosize (or in %)
  7. Set tablelayoutpanel properties autosize = true,autosizemode = grow and shrink
  8. Set Forms properties autosize = true,autosizemode = grow and shrink
  9. Run windows app If your windows app opens in maximum state then set tablelayoutpanel dock property =fill.