SfDataGrid crashes app when user start to scroll the content. (18.1.0.57)

[Tung]

The latest build of Syncfusion Xamarin 18.1.0.57 crashes DataGrid when user start to scroll the DataGrid.

Exception Message is : Object reference not set to an instance of an object

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateClip () [0x00072] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:413 

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateNativeControl () [0x0006c] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:386 

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.HandlePropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00064] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:97 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)

  at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:229 

  at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:353 

  at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) [0x00114] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:461 

  at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x00173] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:397 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) [0x00042] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:334 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindablePropertyKey propertyKey, System.Object value) [0x0000e] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:318 

  at Xamarin.Forms.VisualElement.set_X (System.Double value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:463 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x00043] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:314 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:708 

  at Syncfusion.SfDataGrid.XForms.VirtualizingCellsControl.LayoutChildElements (Xamarin.Forms.Rectangle rect, Syncfusion.GridCommon.ScrollAxis.VisibleLineInfo line, System.Double y, System.Double height, System.Double width, Syncfusion.SfDataGrid.XForms.IColumnElement column, System.Double lineSize) [0x000e3] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Syncfusion.SfDataGrid.XForms.VirtualizingCellsControl.LayoutItems (System.Double y, System.Double width, System.Double height) [0x0014a] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Syncfusion.SfDataGrid.XForms.VirtualizingCellsControl.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00011] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:266 

  at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:224 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:812 

  at Xamarin.Forms.Layout.ForceLayout () [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:125 

  at Syncfusion.SfDataGrid.XForms.VisualContainer.ArrangeRows () [0x00772] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Syncfusion.SfDataGrid.XForms.VisualContainer.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00000] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:266 

  at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:224 

  at Syncfusion.SfDataGrid.XForms.VisualContainer.OnSizeAllocated (System.Double width, System.Double height) [0x004c5] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:812 

  at Xamarin.Forms.Layout.ForceLayout () [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:125 

  at Syncfusion.SfDataGrid.XForms.VisualContainer.ExtendedScrollView_Scrolled (System.Object sender, Xamarin.Forms.ScrolledEventArgs e) [0x0003a] in <0527ff45cf0a4bb0bb765ffb7ea7f8b8>:0 

  at Xamarin.Forms.ScrollView.SetScrolledPosition (System.Double x, System.Double y) [0x00021] in D:\a\1\s\Xamarin.Forms.Core\ScrollView.cs:88 

  at Xamarin.Forms.Platform.iOS.ScrollViewRenderer.UpdateScrollPosition () [0x00008] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\ScrollViewRenderer.cs:319 

  at Xamarin.Forms.Platform.iOS.ScrollViewRenderer.HandleScrolled (System.Object sender, System.EventArgs e) [0x00000] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\ScrollViewRenderer.cs:246 

  at UIKit.UIScrollView+_UIScrollViewDelegate.Scrolled (UIKit.UIScrollView scrollView) [0x0000a] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIScrollView.g.cs:1633 

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

  at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)

  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIKit/UIApplication.cs:86 

  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIKit/UIApplication.cs:65 

  at Phoebus.iOS.Application.Main (System.String[] args) [0x00001] in /Users/tung/Projects/Phoebus/Phoebus.iOS/Main.cs:17 

[Pradeep Kumar Balakrishnan]

HI Tung 

 

Thank you for contacting Syncfusion support. 

 

We have checked the reported issue “Application crashes with latest build of Syncfusion Xamarin 18.1.0.57 DataGrid” in Xamarin forms IOS. After analysis, we have found that this issue is not related to our library and it is happening in Xamarin forms version 4.7. Same issue is already logged in Xamarin framework.  

 

You can track the status of the issue report by the following link.  

Frame work bug link: https://github.com/xamarin/Xamarin.Forms/issues/11132 

  

We suggest you to downgrade the Xamarin Forms version in your application until reported frame work issue is resolved. 

  

Regards, 

Pradeep Kumar B

[Tung]

Thank you the the promptly support. I will downgrade XF as you recommended.

[Pradeep Kumar Balakrishnan]

Hi Tung, 

 

Thank you for the update and let us know if you need any further assistance on this in future. 

 

Regards, 

Pradeep Kumar B 

[Charles]

I am having the same issue with a app that was working fine about a week ago... suddenly it began crashing if I touched and tried to scroll vertically the sfdatagrid content.  After spending two days trying to isolate the issue I found that it only happens if the grid has more rows than will display on the simulator screen.  I finally found this page and tried to downgrade my Xamarin.forms to a version when I knew that the app was working but so for I have not been able to stop the app from crashing.  

Perhaps some other Nuget components need to also be downgraded to resolve the issue.  Any suggestions on what other components might be related to the sfdatagrid/xamarin.forms that might need to be downgraded ... my sfdatagrid version is 18.1.0.59.  I downgrade my Xamarin.forms all the way back to 4.6.0.800 and the grid still crashes the app with NullException as soon as I try to scroll a grid with rows beyond the screen limit on an IOS 13.5 iPhone 8 simulator 

[Charles]

I just discovered that Xamarin.forms Nuget was also installed under the IOS section and still at the latest version 4.6.0.859.  After I removed it, the 4.6.0.847 version appears to have resolved the crashing issue I was having scrolling the results of my sfdatagrid.  Therefore it appears that Xamarin.forms version 4.6.0.859 does cause an app to crash when scrolling the results of a sfdatagrid with more rolls than will fit on a screen.

[Markus]

Hallo,

I had also the same issue. I resolved it, after downgrad to Version 4.6.0.967

Regards,

Markus

[Pradeep Kumar Balakrishnan]

Hi Markus, 

 

Thank you for your valuable information. 

 

Regards, 

Pradeep Kumar B 

[Pradeep Kumar Balakrishnan]

Hi Charles,  

 

Thank you for contacting Syncfusion support. 

 

We suspect crash issue is happened after downgrading Xamarin forms version is due to Bin/ Obj referenence error. Please change the Xamarin forms version to 4.6.0.967 and check your application. If you still facing issue after downgrading Xamarin forms version. Please share Call stack detail of exception to validate the issue from our side. 

Regards, 

Pradeep Kumar B