SfDatagrid.QueryRowHeight Object reference not set to an instance of an object

[Unknown]

Hello,

All the columns of mySfDatagrid are of type GridTemplateColumn.

Within the eventQueryRowHeight I am having this piece of code following this documentation:https://help.syncfusion.com/xamarin/sfdatagrid/row-height-customization

e.Height = MyDataGrid.GetRowHeight(e.RowIndex);

However this line of code results in the following exception.

Object reference not set to an instance of an object

at Syncfusion.SfDataGrid.XForms.iOS.MeasureSize.Convert (Xamarin.Forms.View view, Xamarin.Forms.VisualElement valid) [0x0002c] in <0ef2f7400f5e42cd927535fd5a7e7125>:0

at Syncfusion.SfDataGrid.XForms.iOS.MeasureSize.CalculateHeight (Syncfusion.SfDataGrid.XForms.SfDataGrid grid, Syncfusion.SfDataGrid.XForms.GridColumn column, Xamarin.Forms.View view) [0x0000a] in <0ef2f7400f5e42cd927535fd5a7e7125>:0

at Syncfusion.SfDataGrid.XForms.SfDataGridHelpers.GetTemplateHeight (Syncfusion.SfDataGrid.XForms.SfDataGrid grid, Syncfusion.SfDataGrid.XForms.GridColumn column, System.Object rowData, System.Int32 rowIndex) [0x00060] in <8552459926bc463da39386ee2af01173>:0

at Syncfusion.SfDataGrid.XForms.SfDataGridHelpers.GetRowHeight (Syncfusion.SfDataGrid.XForms.SfDataGrid datagrid, System.Object rowData, System.Int32 rowIndex, Syncfusion.SfDataGrid.XForms.GridRowSizingOptions options) [0x0012e] in <8552459926bc463da39386ee2af01173>:0

at Syncfusion.SfDataGrid.XForms.SfDataGridHelpers.GetRowHeight (Syncfusion.SfDataGrid.XForms.SfDataGrid dataGrid, System.Int32 rowIndex, Syncfusion.SfDataGrid.XForms.GridRowSizingOptions options) [0x00107] in <8552459926bc463da39386ee2af01173>:0

at Yallax.DataBorer.Crypto.Xamarin.Pages.Exchanges.ExchangeInfoPage.Handle_ExchangeCurrencyPairLinksDataGrid_QueryRowHeight (System.Object sender, Syncfusion.SfDataGrid.XForms.QueryRowHeightEventArgs e) [0x00020] in /Users/danielk/Code/Azure DevOps/yallax/DataBorer/src/DataBorer.Crypto.Xamarin/Pages/Exchanges/ExchangeInfoPage.xaml.cs:22

at Syncfusion.SfDataGrid.XForms.SfDataGrid.RaiseQueryRowHeight (Syncfusion.SfDataGrid.XForms.QueryRowHeightEventArgs e) [0x00008] in <8552459926bc463da39386ee2af01173>:0

at Syncfusion.SfDataGrid.XForms.RowGenerator.QueryRowHeight (System.Int32 rowIndex, System.Double& height) [0x00011] in <8552459926bc463da39386ee2af01173>:0

at Syncfusion.SfDataGrid.XForms.VisualContainer.SetRowHeights () [0x0016d] in <8552459926bc463da39386ee2af01173>:0

at Syncfusion.SfDataGrid.XForms.VisualContainer.OnSizeAllocated (System.Double width, System.Double height) [0x00242] in <8552459926bc463da39386ee2af01173>:0

at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:793

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

at Syncfusion.SfDataGrid.XForms.SfDataGrid.OnItemsSourceChanged (Xamarin.Forms.BindableObject bindable, System.Object oldValue, System.Object newValue) [0x002e7] in <8552459926bc463da39386ee2af01173>:0

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) [0x0015b] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:422

at Xamarin.Forms.BindingExpression.ApplyCore (System.Object sourceObject, Xamarin.Forms.BindableObject target, Xamarin.Forms.BindableProperty property, System.Boolean fromTarget) [0x00220] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:167

at Xamarin.Forms.BindingExpression.Apply (System.Boolean fromTarget) [0x0003e] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:57

at Xamarin.Forms.BindingExpression+BindingExpressionPart.b__49_0 () [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:618

at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.15/src/Xamarin.iOS/Foundation/NSAction.cs:152

--- 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/12.2.1.15/src/Xamarin.iOS/UIKit/UIApplication.cs:79

at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.15/src/Xamarin.iOS/UIKit/UIApplication.cs:63

at Yallax.DataBorer.Crypto.Xamarin.iOS.Application.Main (System.String[] args) [0x00002] in /Users/danielk/Code/Azure DevOps/yallax/DataBorer/src/DataBorer.Crypto.Xamarin.iOS/Main.cs:16

Thank you for your support

Daniel K.

[Subburaj Pandian Veluchamy]

Hi Daniel, 

  

Thank you for contacting Syncfusion support. 

 

Based on the provided information, we have checked your query “Exception is raised when we calculate row height in QueryRowHeight event when all the columns are template column” with latest update version 16.4.0.53 and it is working fine from our side. We have attached the tested sample for you reference and you can download the same from the below link.  

  

Sample Link :http://www.syncfusion.com/downloads/support/forum/142734/ze/Archive545721424 

 

If the given sample doesn’t meet your requirement, please modify the sample based on your scenario and revert to us to reproduce the issue from our side. It will be helpful for us to validate the issue and provide you the solution at earlier.  

 

Regards,
Subburaj Pandian V