1. Feedback
  2. Xamarin.Forms
  3. 5233

Welcome to the Xamarin.Forms feedback portal. We’re happy you’re here! If you have feedback on how to improve the Xamarin.Forms, we’d love to hear it!

  • Check out the features or bugs others have reported and vote on your favorites. Feedback will be prioritized based on popularity.
  • If you have feedback that’s not listed yet, submit your own.

Thanks for joining our community and helping improve Syncfusion products!

1
Vote

SFDataForm Throwing Exception

The SFDataForm (Xamarin Forms Android only - works on iOS) is throwing an exception while processing AutoGeneratingDataFormItem: Object reference not set to an instance of an object.


Stack Trace:


  at (wrapper dynamic-method) System.Object.43(intptr,intptr)

  at (wrapper native-to-managed) System.Object.43(intptr,intptr)

  at (wrapper managed-to-native) Java.Interop.NativeMethods.java_interop_jnienv_call_nonvirtual_void_method_a(intptr,intptr&,intptr,intptr,intptr,Java.Interop.JniArgumentValue*)

  at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualVoidMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x00073] in <286213b9e14c442ba8d8d94cc9dbec8e>:0 

  at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeVirtualVoidMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x0005d] in <286213b9e14c442ba8d8d94cc9dbec8e>:0 

  at Android.Views.ViewGroup.AddView (Android.Views.View child) [0x00031] in <95d915721ad748108ff096dce8f8f32c>:0 

  at Xamarin.Forms.Platform.Android.VisualElementPackager.AddChild (Xamarin.Forms.VisualElement view, Xamarin.Forms.Platform.Android.IVisualElementRenderer oldRenderer, Xamarin.Forms.Platform.Android.RendererPool pool, System.Boolean sameChildren) [0x00146] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:137 

  at Xamarin.Forms.Platform.Android.VisualElementPackager.OnChildAdded (System.Object sender, Xamarin.Forms.ElementEventArgs e) [0x0000f] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:164 

  at Xamarin.Forms.Element.OnChildAdded (Xamarin.Forms.Element child) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:312 

  at Xamarin.Forms.VisualElement.OnChildAdded (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:756 

  at Xamarin.Forms.Page.OnInternalAdded (Xamarin.Forms.VisualElement view) [0x00013] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:385 

  at Xamarin.Forms.Page.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00086] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:374 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <fb6d78e506844b3b96d5b35aa047fbbd>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <fb6d78e506844b3b96d5b35aa047fbbd>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].InsertItem (System.Int32 index, T item) [0x0001a] in <fb6d78e506844b3b96d5b35aa047fbbd>:0 

  at System.Collections.ObjectModel.Collection`1[T].Add (T item) [0x00020] in <d4a23bbd2f544c30a48c44dd622ce09f>:0 

  at Xamarin.Forms.TemplateUtilities.OnContentChanged (Xamarin.Forms.BindableObject bindable, System.Object oldValue, System.Object newValue) [0x00041] in D:\a\1\s\Xamarin.Forms.Core\TemplateUtilities.cs:67 

  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) [0x00120] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:624 

  at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x00179] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:422 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) [0x0003d] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:572 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:122 

  at Xamarin.Forms.ContentPage.set_Content (Xamarin.Forms.View value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\ContentPage.cs:11