WebView2 WinForms c# "3. Getting Started" Errors ?

Question

Hello;

I am at 'Step 3 - Create a single WebView'

https://learn.microsoft.com/en-us/microsoft-edge/webview2/gettingstarted/winforms

But when I compile program I get the following error;

System.NullReferenceException  
HResult=0x80004003  
Message=Object reference not set to an instance of an object.  
Source=Microsoft.Web.WebView2.WinForms  
StackTrace:  
at Microsoft.Web.WebView2.WinForms.WebView2.OnVisibleChanged(EventArgs e)  
at System.Windows.Forms.Control.AssignParent(Control value)  
at System.Windows.Forms.Control.ControlCollection.Add(Control value)  
at System.Windows.Forms.Form.ControlCollection.Add(Control value)  
at WinFormsGettngStarted.Form1.InitializeComponent() in C:\Users\vmars\source\repos\WinFormsGettngStarted\Form1.Designer.cs:line 50  
  
  
From this line:  this.Controls.Add(this.webView);   
  

How can I get past this error ?

Thanks for yur Help...

Answer 1

Hello Vernon,

Thank you for taking time to post this issue in Microsoft Q&A forum.

This issue is caused by not choosing appropriate Platform target, please go to the properties page of your Winform project (right-click > Properties), then click Build > Platform target and choose x64 then press F5 to test again.

Sincerely,
Tianyu

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Answer 2

Thank you TianyuSun !

Answer 3

On My app this doesn't work.