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WPF application crashed when hosting WPF EO browser in Windows form using Elementhost. Options
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bnymellon
Posted: Saturday, September 19, 2020 3:21:42 AM
Rank: Advanced Member
Groups: Member

Joined: 3/10/2020
Posts: 59
Hi,
We are using WPF EO.WebBrowser in Winforms using ElementHost(System.Windows.Forms.Integration).
WPF application is crashed when user clicks in text box and try to input values in a webpage.
Same is working fine when webview hosted in WPF window.

Below is the event viewer stack trace.

Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
at System.Windows.Forms.Integration.ApplicationInterop.ThreadMessageFilter(System.Windows.Interop.MSG ByRef, Boolean ByRef)
at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(System.Windows.Interop.MSG ByRef)
at EO.Wpf.WebViewHost+a.c(c)
at EO.Wpf.WebViewHost+a.a(c)
at EO.WebBrowser.WebView+i.a(UInt32, IntPtr, IntPtr, Boolean ByRef)
at EO.WebBrowser.WebView+l.a(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at EO.Internal.x.b(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at EO.Internal.x.b(IntPtr, Int32, IntPtr, IntPtr)

Please advice on above exception

Does EO browser support winforms elementhost ?

ElementHost:
https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.integration.elementhost?view=netcore-3.1.
https://docs.microsoft.com/en-us/dotnet/desktop/wpf/advanced/walkthrough-hosting-a-wpf-composite-control-in-windows-forms?view=netframeworkdesktop-4.8
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eo_support
Posted: Saturday, September 19, 2020 1:45:54 PM
Rank: Administration
Groups: Administration

Joined: 5/27/2007
Posts: 24,217
Hi,

You should not use it this way. EO.WebBrowser has a Windows.Form wrapper control (EO.WinForm.WebControl) that you can use directly inside a Windows.Form application. So there is no need for you to use the WPF version and then use an ElementHost in order to put it inside a Windows.Forms application.

Thanks!
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