WPF Web browser control, page loading issue, when Window has TopMost and program running under auto elevated permission

Question

WPF Web browser control, page loading issue, when Window has TopMost and program running under auto elevated permission

Sachin Jose 61

Condition:

WPF Application with Window contains System.Windows.Forms.WebBrowser has TopMost=true setted, in code or XAML.
Program has uiAccess="true" flag in manifest file.
Code sign program.
Start program from subfolders of 'c:\program files'

I tried the above conditions in a test application, and it seems like navigation is not happening here. If the TopMost property is false, navigation occur.

Is this a base issue ? Any suggestions ?

Hui Liu-MSFT 48,676 Microsoft External Staff

Hi,@SachinJose-8477 .Could you share me your test project to reproduce the problem and analysis? Maybe it has something to do with the settings?
By using the following code in wpf using winform's WebBrowser and setting TopMost (without setting conditions 2, 3, 4), the navigated page can be displayed normally.

 <Window x:Class="WebbrowserDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WebbrowserDemo"
        mc:Ignorable="d" Topmost="False"
        xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <WindowsFormsHost>
            <WindowsFormsHost.Child>
                <wf:WebBrowser x:Name="wb" />
            </WindowsFormsHost.Child>
        </WindowsFormsHost>
    </Grid>
</Window>

 public MainWindow()
    {
      InitializeComponent();
      wb.Navigate("https://www.bing.com/");
    }

Sachin Jose 61 Reputation points

2022-02-15T06:27:14.363+00:00

I couldn't find an upload option for a zip file. The above screenshot explains my implementation. My feasibility demands to use UiAccess and TopMost property for the application. If both these properties are enabled, the application fails to start. Otherwise there is no problem in loading the page.
Hui Liu-MSFT 48,676 Reputation points Microsoft External Staff

2022-02-16T06:41:01.057+00:00

Hi,@SachinJose-8477.Why did your project fail to start? Could you show a screenshot of the bug report?
The problem that I can't start the project is as follows：

I use the following steps to run the project normally and display the WebBrowser.

1 answer

Your answer

Hui Liu-MSFT 48,676 Reputation points Microsoft External Staff

2022-02-15T05:41:31.64+00:00

Hi,@SachinJose-8477 .Could you share me your test project to reproduce the problem and analysis? Maybe it has something to do with the settings?
By using the following code in wpf using winform's WebBrowser and setting TopMost (without setting conditions 2, 3, 4), the navigated page can be displayed normally.

<Window x:Class="WebbrowserDemo.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:WebbrowserDemo" mc:Ignorable="d" Topmost="False" xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms" Title="MainWindow" Height="450" Width="800"> <Grid> <WindowsFormsHost> <WindowsFormsHost.Child> <wf:WebBrowser x:Name="wb" /> </WindowsFormsHost.Child> </WindowsFormsHost> </Grid> </Window> public MainWindow() { InitializeComponent(); wb.Navigate("https://www.bing.com/"); }
Sachin Jose 61 Reputation points

2022-02-15T06:27:14.363+00:00

I couldn't find an upload option for a zip file. The above screenshot explains my implementation. My feasibility demands to use UiAccess and TopMost property for the application. If both these properties are enabled, the application fails to start. Otherwise there is no problem in loading the page.
Hui Liu-MSFT 48,676 Reputation points Microsoft External Staff

2022-02-16T06:41:01.057+00:00

Hi,@SachinJose-8477.Why did your project fail to start? Could you show a screenshot of the bug report?
The problem that I can't start the project is as follows：

I use the following steps to run the project normally and display the WebBrowser.

Answer 1

If your problem is the same as mine, you can try the following steps to see if it works.

Right Click on Visual Studio> Open File Location.
Right Click on Visual Studio Shortcut > Select Troubleshoot compatibility.
Select Troubleshoot Program.
Check The program requires additional permissions.
Click on Test the program.
Wait for a moment till the program starts.
Click Next.
Select “Yes, save these settings for this program”.
Wait for resolving the issue.
Make sure the final status is fixed.
Click Close.

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WPF Web browser control, page loading issue, when Window has TopMost and program running under auto elevated permission

1 answer

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