Null reference exception When try to Bind SelectedItems

[Evgeni]

Hello, I am trying to Bind SfDataGrid.SelectedItems and get a crash:

  at Syncfusion.SfDataGrid.XForms.SfDataGrid.WireEvents () [0x0000f] in <a74d4daa2e9d4fbb83f3e9693ce0c478>:0 

  at Syncfusion.SfDataGrid.XForms.SfDataGrid.SetSourceList (System.Object source) [0x0000d] in <a74d4daa2e9d4fbb83f3e9693ce0c478>:0 

  at Syncfusion.SfDataGrid.XForms.SfDataGrid.RefreshContainerAndView () [0x0002c] in <a74d4daa2e9d4fbb83f3e9693ce0c478>:0 

  at Syncfusion.SfDataGrid.XForms.SfDataGrid.gridLoaded () [0x00032] in <a74d4daa2e9d4fbb83f3e9693ce0c478>:0 

  at Syncfusion.SfDataGrid.XForms.SfDataGrid.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00068] in <a74d4daa2e9d4fbb83f3e9693ce0c478>: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.SfDataGrid.OnSizeAllocated (System.Double width, System.Double height) [0x0001f] in <a74d4daa2e9d4fbb83f3e9693ce0c478>:0 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in d:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:792 

  at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in d:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:1062 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in d:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:307 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in d:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:688 

  at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.VisualElement child, Xamarin.Forms.Rectangle region) [0x001da] in d:\a\1\s\Xamarin.Forms.Core\Layout.cs:178 

  at Xamarin.Forms.Grid.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00144] in d:\a\1\s\Xamarin.Forms.Core\GridCalc.cs:49 

  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:792 

  at Xamarin.Forms.Layout.ResolveLayoutChanges () [0x0005c] in d:\a\1\s\Xamarin.Forms.Core\Layout.cs:392 

  at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.10.0.21/src/Xamarin.iOS/Foundation/NSAction.cs:152 

  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/13.10.0.21/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/13.10.0.21/src/Xamarin.iOS/UIKit/UIApplication.cs:65 

  at Qkiss.iOS.Application.Main (System.String[] args) [0x00001] in /Users/evgeniykhoduley/q-kiss/src/platform/Qkiss.iOS/Main.cs:11 


I have the following code:

<sfDataGrid:SfDataGrid

                        Grid.Row="7"

                        Grid.Column="0"

                        Grid.RowSpan="6"

                        Grid.ColumnSpan="5"

                        x:Name="TaskGrid"

                        ItemsSource="{Binding TaskTemplates.DisplayItems}"

                        AutoGenerateColumns="False"

                        IsVisible="{Binding IsNewTaskType, Converter={StaticResource InvertBoolConverter}}"

                        SelectionMode="Multiple"

                        ColumnSizer="LastColumnFill"

                        GridStyle="{StaticResource QkissTaskGridStyle}"

                        AllowResizingColumn="True"

                        EnableDataVirtualization="True"

                        QueryRowHeight="TaskSupplyDataGrid_OnQueryRowHeight"

                        BackgroundColor="Transparent"

                        AllowSorting="True"

                        SelectionController="{StaticResource QkissDataGridController}"

                        SelectedItem="{Binding SelectedTaskTemplate}"

                        SelectedItems="{Binding SelectedTaskTemplates, Mode=OneWay}">

public class QkissDataGridController : GridSelectionController {

        private readonly ColorResource _colorResource;

        public QkissDataGridController() {

            _colorResource = new ColorResource();

        }

        public override Color GetSelectionColor(int rowIndex, object rowData)

        {

            return Xamarin.Forms.Color.FromHex("#93e687");

        }

    }

[Karthikraja Kalaimani]

 

Hi Evgeni,

Currently, we are validating the reported issue and we will validate and update you further details on or before 3^rd June 2020. We appreciate your patience until then.

Regards,
Karthik Raja 

[Karthikraja Kalaimani]

Hi Evgeni,

Please let us know the below details to check the issue and provide you a better solution asap.

i) SfDataGrid version
ii) Xamarin forms version

Regards,
Karthik Raja