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MDI form error

Hi,

I'm trying to do an MDI app and when the child form is maximized and is its openned another maximized form gives the following error:

(I tested with "WindowState" in normal and doesn´t give the error)

-----------------------------------------------------

System.NullReferenceException

HResult=0x80004003

Message=A referência de objecto não foi definida como uma instância de um objecto.

Source=System.Windows.Forms

StackTrace:

at System.Windows.Forms.NativeWindow.WindowClass.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

-----------------------------------------------------

Line: form.Show();

Syncfusion version: 20.1.0.50




4 Replies
VD Vasanthkumar Durairaj Syncfusion Team May 3, 2022 12:49 PM UTC

Hi Diogo,

 

Based on provided information we have checked the reported issue, but we are unable to reproduce the reported issue on our end. If you still facing the same issue, please modify the attached sample based on your scenario. It will be more helpful for us to find the exact cause and provide you with a prompt and timely solution.

 

 

Regards,
Vasanthkumar D
 


Attachment: SfForm_b4c59a40.zip

DI Diogo May 3, 2022 01:06 PM UTC

Hi,  Vasanthkumar D,


Use the attached project to test.


Thanks!


Attachment: WindowsFormsApp10_31175afe.rar

DM Dhanasekar Mohanraj Syncfusion Team May 4, 2022 02:13 PM UTC

Hi Diogo,


We have checked the reported issue with the provided sample. And it is confirmed it as a defect. We have logged a bug report on this regard. We will fix this issue and include in our May 17th, 2022 NuGet release.

You can track the status of this report through the following feedback link,


Feedback link: Null reference exception occurs when closing the SfForm in WinForms | Feedback Portal (syncfusion.com)

Note: The provided feedback link is private, and you need to login to view this feedback.

We appreciate your patience until then.

Regards,

Dhanasekar M.


DM Dhanasekar Mohanraj Syncfusion Team May 17, 2022 02:23 PM UTC

Hi Diogo,

We would like to let you know that Essential Studio Weekly NuGet packages (v20.1.0.56) has been published in nuget.org with the fix for the issue “Null reference exception occurs when closing the SfForm”. Please let us know if you have any concerns in this.

Regards,
Dhanasekar M.


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