create project error

[Muhammad]

hello

sorry if the control type that i selected is wrong because i didnt know what to select, im having a trouble when i try to make a new project using syncfusuing winforms app, i get this error

call stack:

System.NullReferenceException: Object reference not set to an instance of an object.

   at Syncfusion.Templates.UI.ViewModels.NewProject.MainViewModel.<OnTemplatesAvailableAsync>d__55.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Syncfusion.Templates.UI.ViewModels.Common.BaseMainViewModel.<OnSyncStatusChanged>d__35.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

   at System.Windows.Threading.DispatcherOperation.InvokeImpl()

   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Windows.Threading.DispatcherOperation.Invoke()

   at System.Windows.Threading.Dispatcher.ProcessQueue()

   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)

   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

   at System.Windows.Window.ShowHelper(Object booleanBox)

   at System.Windows.Window.ShowDialog()

   at Microsoft.Internal.VisualStudio.PlatformUI.WindowHelper.ShowModal(Window window, IntPtr parent)

   at Syncfusion.Templates.UI.VisualStudio.VsGenShell.<>c__DisplayClass26_0.<<ShowModal>b__0>d.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()

   at Syncfusion.Templates.UI.VisualStudio.VsGenShell.ShowModal(IWindow shell)

   at Syncfusion.Templates.UI.Launcher.WizardLauncher.LaunchWizardShell(IWizardShell wizardShell)

   at Syncfusion.Templates.UI.Launcher.WizardLauncher.StartWizard(IWizardShell wizardShell, WizardTypeEnum wizardType)

screenshot of the error:

 

[Sivasankar Mathiyazhagan]

Hi,

Thank you for contacting us! After thoroughly reviewing your query, we were able to reproduce this issue on our end. Please refer to the details below for your query.

Root Cause:

It seems that there might be older version extension cache files present in your Visual Studio directories, which could be causing the error you've encountered. Rest assured, selecting controls from our template should not cause any issues as you've described.

Solution:

To resolve this issue, we recommend uninstalling all Syncfusion extensions from Visual Studio, removing the cache files, and then reinstalling them. Here are the steps to do so:

Steps to uninstall the extension and remove cache files:

1. Open Visual Studio 2022.
2. Go to the "Extensions" menu at the top of the window.
3. Click on "Manage Extensions" from the dropdown menu.
4. In the “Manage Extensions” dialog, select "Installed" from the left-hand side menu. This will display a list of all installed extensions.
5. Find the syncfusion extension uninstall from the list. You can use the search box at the top right corner to quickly find it.
6. Once you've located the extension, click on it to select it.
7. Click the "Uninstall" button that appears next to the selected extension.
8. A confirmation dialog will appear asking if you're sure you want to uninstall the extension. Click "Yes" to confirm.
9. Close all Visual Studio instances, and the VSIX Installer will be launched.
10. After clicking Modify button, the uninstallation process will be started.
11. Once the preceding steps have been completed, navigate to the following paths and type the Syncfusion into the search box, then delete the folder that contains Syncfusion DLLs if it exists.
    Path 1: %localappdata%\Microsoft\VisualStudio\{17.0_random folder number} \Extensions\
    
    Path 2: {Microsoft Visual Studio Installed Location}\ Common7\IDE\Extensions\

Steps to Install the extension from Build location:

1. Navigate to the WinForms build location directory mentioned below, corresponding to your Visual Studio version:

Build Location Directory: C:\Program Files (x86)\Syncfusion\Essential Studio\Windows\$YourBuildVERSION$\Utilities\Extensions\$YourVisualStudioVERSION$\Syncfusion WinForms Template Studio.vsix.

2. Simply double-click the “. vsix” file from the above directory for WinForms Extension Installation. This action should automatically launch Visual Studio and initiate the installation process.
3.  In Visual Studio, a dialog will appear, confirming the installation of the WinForms extension. Click on the "Install" button to proceed.
4. Once the installation is complete, it's recommended to restart Visual Studio.

If the issue persists after following the provided workaround, kindly provide the following details to assist you further:

1. In Visual Studio, navigate to Extensions -> Manage Extensions -> Installed and search for the Syncfusion extensions by entering the keyword “syncfusion” in the search box. Please share a screenshot of that dialog.

2. In Visual Studio, go to Help -> About Microsoft Visual Studio and click the "Copy info" button. Then, paste the information into a text file and share it with us.

3. Gather log file. Please follow the steps in the link  to get the Gather log file.

We appreciate your cooperation. Please feel free to reach out to us if you have any further concerns.

Regards,

Sivasankar M.

[Muhammad]

it worked!

Thanks for your help, i really appreciate it.