Why is DataGrid.EnableRowVirtualization is not available in UWP? I need this so that DataGrid wont instantiate a DataGridRow object for each data item in the bound data source. This is the best solution to fix auto checking of checkboxes in a DataGrid when user scrolls down and up. Unfortunately, this is not available in UWP. Is there a work around to fix auto checking of checkboxes in DataGrid when user scrolls up and down? Thanks~

Hello, Welcome to Micorosoft Q&A, DataGrid.EnableRowVirtualization is not available in UWP EnableRowVirtualization , please refer document, it is desktop top DataGrid property, it is not apply to UWP DataGrid. And UWP DataGrid is enable virtualization automatically. If you want to disable checkbox auto overwrite, please binding it with specific bool property. <controls:DataGridTemplateColumn Header="Serach" Visibility="Collapsed"> <controls:DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox Content="{Binding Name}" IsChecked="{Binding Complete}" /> </StackPanel> </DataTemplate> </controls:DataGridTemplateColumn.CellTemplate> </controls:DataGridTemplateColumn> Model Class public class Item :INotifyPropertyChanged { public string Name { get; set; } public bool IsSearch { set; get; } private bool _complete; public bool Complete { get { return _complete; } set { _complete = value; OnPropertyChanged(); } } public event PropertyChangedEventHandler PropertyChanged; private void OnPropertyChanged([CallerMemberName] string propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } } If you do want to disable virtualization, you may try to place DataGrid in the ScrollViewer , please note disable virtualization will consume more memory and degrade performance. If the response is helpful, please click " Accept Answer " and upvote it. Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

DataGrid.EnableRowVirtualization is not available in UWP

Accepted answer

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-11T01:57:07.897+00:00
Hello, Welcome to Micorosoft Q&A,

DataGrid.EnableRowVirtualization is not available in UWP

EnableRowVirtualization, please refer document, it is desktop top DataGrid property, it is not apply to UWP DataGrid. And UWP DataGrid is enable virtualization automatically. If you want to disable checkbox auto overwrite, please binding it with specific bool property.

<controls:DataGridTemplateColumn Header="Serach" Visibility="Collapsed"> <controls:DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox Content="{Binding Name}" IsChecked="{Binding Complete}" /> </StackPanel> </DataTemplate> </controls:DataGridTemplateColumn.CellTemplate> </controls:DataGridTemplateColumn>

Model Class

public class Item :INotifyPropertyChanged { public string Name { get; set; } public bool IsSearch { set; get; } private bool _complete; public bool Complete { get { return _complete; } set { _complete = value; OnPropertyChanged(); } } public event PropertyChangedEventHandler PropertyChanged; private void OnPropertyChanged([CallerMemberName] string propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } }

If you do want to disable virtualization, you may try to place DataGrid in the ScrollViewer, please note disable virtualization will consume more memory and degrade performance.

If the response is helpful, please click "Accept Answer" and upvote it.
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Dennis Arriola 61 Reputation points

2021-06-11T05:01:39.617+00:00

Hello @Nico Zhu (Shanghai Wicresoft Co,.Ltd.) ,

Thanks for your quick response.

I tried your first suggestion (binding specific bool property for IsCheck) however, this cause firing of the check an uncheck events resulting to auto checking/unchecking of other items again.

I already tried the second suggestion, but my concern here is that the header of the datagrid is included in scrolling. It cannot be frozen. Is there a way to free the header when scrolling down and up?

Thanks~

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-11T06:24:59.227+00:00

For second suggestion, there is no better way to fix the header, because it was the part of scrollviewer content.

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-11T06:31:53.7+00:00

this cause firing of the check an uncheck events resulting to auto checking/unchecking of other items again. Could you explain that ? we can't reproduce this problem.

Dennis Arriola 61 Reputation points

2021-06-11T07:13:57.227+00:00

Hello @Nico Zhu (Shanghai Wicresoft Co,.Ltd.) ,

Thanks for your reply.
Please see more explanation on the first example :

The IsChecked property of CheckBox causes to call/fire the Checked and UnChecked event when use scrolls up and down.

The binded events SelectFilesCommand and UnSelectFilesCommand set the IsSelected property of the model to True and False respectively for each item.

When items are checked and user scrolls up or down, the binded events are fired/called.
Depends on the current state of the item, e.g. item is checked, when user scrolls up/down and this item is not displayed anymore in the data grid, it will fire the UnSelectFilesCommand hence resulting to unchecking it again.

Thanks~

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-11T07:52:19.563+00:00

Why not use IsCheck property as seletct flag for the item?

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-11T07:58:35.817+00:00

When items are checked and user scrolls up or down, the binded events are fired/called.

Because the datagrid has enabled visualization, and when you scroll down or up, the new item will update the check state, so it will invoke event, for this scenario, please use IsCheck property to represent item selected and set bind mode as TwoWay.

<CheckBox Content="{Binding Name}" IsChecked="{Binding Complete, Mode=TwoWay}" />

And you can detect the checkbox checked within Complete set method.

public bool Complete { get { return _complete; } set { // if value is true, you could mark it as select item _complete = value; OnPropertyChanged(); } }

Dennis Arriola 61 Reputation points

2021-06-14T09:31:19.127+00:00

I think I am already using IsChecked property as the select flag of the item. (think)

Dennis Arriola 61 Reputation points

2021-06-14T09:57:48.743+00:00

Hello @Nico Zhu (Shanghai Wicresoft Co,.Ltd.) ,

I have one more question, how do I get the selected item without using the Content property of the checkbox control?
I think I already get your suggestion, however I am confused as to how to get the selected item.

The reason I used interactivity so that I can get the selected item thru commandparameter and add it in the list for selected items.
Can you give me some suggestions on how to achieve it by just doing it in the set property of Complete in your example.

Thank you/~

Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points

2021-06-15T01:31:12.92+00:00

Sure, you have many way to get selected item. for example, you could for-each the items. if the item's Complete property is true, you could make it as list.

var items = MyClasses.Where(p => p.Complete == true).ToList();

If the response is helpful, please click "Accept Answer" and upvote it.

Dennis Arriola 61 Reputation points

2021-06-15T07:32:52.21+00:00

Hello @Nico Zhu (Shanghai Wicresoft Co,.Ltd.) ,

I already resolved my issue. Thanks for your inputs.
Highly appreciated. :)
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DataGrid.EnableRowVirtualization is not available in UWP

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