Databases
StackOverflow2013
Postsdbo
POPartially Transparent Panels in WinForms app showing up black on Windows XP
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
    primarykey
    data
    text
    <p>Preface: Pardon for the partial images - This has to do with a work-in progress for my company.</p> <p>I have tested this on several fully updated Windows XP SP3 laptops using both .NET4.0 and .NET3.5. The end result is the same.</p> <p>I have a WinForms application. On the first screen of the application I have several panels that are a partially transparent black. I set this color by manually typing it into the properties editor.</p> <p><img src="https://i.stack.imgur.com/RX3ZD.png" alt="enter image description here"></p> <p>The resulting designer code if it helps is</p> <pre><code>this.pnlMain.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(125)))), ((int)(((byte)(0)))), ((int)(((byte)(0)))), ((int)(((byte)(0))))); </code></pre> <p>The visual end result is (corner of my main panel, the main form has an image background):</p> <p><img src="https://i.stack.imgur.com/fmwCD.png" alt="enter image description here"></p> <p>When I open my application on the problematic Windows XP machines, this is the result (the panel is solid black, sorry for the camera phone):</p> <p><img src="https://i.stack.imgur.com/pGQhi.png" alt="enter image description here"></p> <p>The application looks as expected on Windows Vista -> Windows 8. </p> <p>The curious thing is that on Windows XP if I click and drag the application to where it is almost completely off-screen and then drag it back into visual range, the partial transparency renders properly. </p> <p>I believe there is some weird paint/invalidation issue happening. Does anyone have any ideas? I have looked at many of the "transparency turns black" issues on StackOverflow and most mention custom controls, however it doesn't feel like that is a solution for my problem. Thanks in advance!</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USBrandon
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. USGJKH
      1. VTFavorite
    1. COwinforms doesn't (seriously) support transpacency. Your options are: 1 - use winforms as-is, not trying to get anything "cool" out of it. 2 - use WPF.
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. USFederico Berasategui
    2. CODoes it only work when you move the window off screen or if you just move the window? Maybe try calling yourpanel.Invalidate() or yourpanel.Refresh() in Form.Shown. Try the same for the container of the bg image also.
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. USGJKH
    3. COThere's no conceivable reason why this would not work properly, Panel supports partial transparency just fine. Whatever might be wrong cannot possibly be guessed at from screenshots.
      singulars
      1. POPartially Transparent Panels in WinForms app showing up black on Windows XP
      1. USHans Passant
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload