Blank page if browser control is not visible at startup

[NeomMob]

• What version of the product are you using? v71 from Nuget

• What architecture x86 or x64? x64

• On what operating system? Win10

• Are you using WinForms, WPF or OffScreen? WPF

• What steps will reproduce the problem?

• Use demo app (based on minimal example) from https://github.com/NeomMob/CefSharp.MinimalExample/tree/master/CefSharp.MinimalExample.Wpf

• Click multiple time the toggle browser visibility button. Soon or later, the browser start to freeze and has incorrect layout.

• What is the expected output? What do you see instead?

• Please provide any additional information below. No crash, just not getting the expected behavior. debug.log:

  [0308/064211.851:ERROR:broker_win.cc(137)] Error sending sync broker message: The pipe is being closed. (0xE8)
  [0308/064533.989:ERROR:broker_win.cc(137)] Error sending sync broker message: The pipe is being closed. (0xE8)
  [0308/070902.294:ERROR:broker_win.cc(137)] Error sending sync broker message: The pipe is being closed. (0xE8)
  [0308/070923.367:ERROR:broker_win.cc(137)] Error sending sync broker message: The pipe is being closed. (0xE8)

  • Any other background information that's relevant? Are you doing something out of the ordinary? 3rd party controls? Using mahapps.metro

• Does this problem also occur in the CEF Sample Application from http://opensource.spotify.com/cefbuilds/index.html?

  • To compare with WPF run cefclient --multi-threaded-message-loop --off-screen-rendering-enabled --enable-gpu
  • To compare with WinForms run cefclient --multi-threaded-message-loop
  • If you can reproduce the problem with cefclient then you'll need to report the bug on https://bitbucket.org/chromiumembedded/cef/overview there is no point opening an issue here. (Make sure you search before opening an issue)
  • Please include the version you tested with e.g. cef_binary_3.3029.1611.g44e39a8_windows64_client.tar.bz2. It's important to you test with the same version that CefSharp is based on. Check the release notes to determine the version (https://github.com/cefsharp/CefSharp/releases) or load chrome://version in the browser.

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Environment

• CefSharp Version 71
• WPF
• Framework 4.6.2
• HiDPI support activated through <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">True/PM</dpiAware>

Description

I am developing an application where the browser control is at startup inside a grid column having a 0 width. It results to a blank browser when I resize the containing grid column.

It seems to really look like #1412 but I did not find a way to fix the issue.

[amaitland]

Please use the template provided at https://github.com/cefsharp/CefSharp/blob/master/ISSUE_TEMPLATE.md#bug-report

Will need an example that reproduces your problem.

[NeomMob]

I updated the issue

[amaitland]

• Use demo app (based on minimal example) from https://github.com/NeomMob/CefSharp.MinimalExample/tree/master/CefSharp.MinimalExample.Wpf

Thanks 👍

• Click multiple time the toggle browser visibility button. Soon or later, the browser start to freeze and has incorrect layout.

This differs greatly from the issue Title. Title suggests there is only a problem at Startup.

[NeomMob]

@amaitland actuallyt it really look like https://github.com/cefsharp/CefSharp/issues/1571

[amaitland]

In that case closing as duplicate of #2547

There are a few resize issues that will be fixed upstream in 73