Command breaks

Question

Command breaks

Eduardo Gomez Romero 1,375

 <mct:EventToCommandBehavior
     Command="{Binding ConfirmDateCommand, Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}}"
     CommandParameter="{Binding Source={x:Reference picker}, Path=SelectedDate}"
     EventName="OkButtonClicked" />

System.InvalidOperationException: 'Operation is not valid due to the current state of the object.'

StackTrace = " at Microsoft.Maui.Controls.Binding.<ApplyRelativeSourceBinding>d__27.MoveNext()\r\n at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)\r\n at Microsoft.UI.Dispatching.DispatcherQueueSynchronizationContext.<>c__DisplayClass2_0.<Post>b__0()", Source = "Microsoft.Maui.Controls", Message = "Operation is not valid due to the current state of the object.", InnerException = null, HelpLink = null, HResult = -2146233079, Data = {System.Collections.ListDictionaryInternal}

     [RelayCommand]
     void ConfirmDate(DateTime dateTime) {

         if (DateTimePicker != null) {

             currentCulture = new CultureInfo(deviceLanguageService.GetDeviceLanguage());

             Turbine!.InstalationDateTime = dateTime;

             DateTimePicker.IsOpen = false;

             Turbine.StringifyInstalationDate = Turbine.InstalationDateTime?.ToString("D", currentCulture)!;

         }
     }

Eduardo Gomez Romero 1,375 Reputation points

2024-10-24T11:27:33.9866667+00:00

I do not understand why
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-25T06:38:57.4666667+00:00

Could you share the source? Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}

And could you add break points to check on which line of the code you get the exception?

Eduardo Gomez Romero 1,375

Hello

This is the line that cause the error

SQLCopy

    [RelayCommand]
    void AddNewTurbinePopUp(SfPopup popUp) {
        if (popUp != null) {
            popUp.IsOpen = true;
        }
    }

and for some reason, the datePicker is the one casing the error

PowerShellCopy

                <picker:SfDateTimePicker
                    x:Name="picker"
                    Grid.Row="4"
                    Style="{x:DynamicResource DateTimePickerStyle}">
                    <picker:SfDateTimePicker.Behaviors>
                        <mct:EventToCommandBehavior
                            Command="{Binding BindingContext.CancelDateCommand, Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}}"
                            CommandParameter="{x:Binding Source={x:Reference picker}}"
                            EventName="CancelButtonClicked" />
                        <mct:EventToCommandBehavior
                            Command="{Binding BindingContext.ConfirmDateCommand, Source={x:Reference TurbinesCollection}}"
                            CommandParameter="{x:Binding Source={x:Reference picker},
                                                         Path=SelectedDate}"
                            EventName="OkButtonClicked" />
                    </picker:SfDateTimePicker.Behaviors>
                </picker:SfDateTimePicker>
                <Border
                    Grid.Row="1"
                    Grid.ColumnSpan="2"
                    Style="{x:StaticResource CommonBorderStyle}">
                    <Grid ColumnDefinitions="*,60">
                        <Entry
                            IsReadOnly="True"
                            Text="{x:Binding Turbine.StringifyInstalationDate}"
                            TextColor="Black" />
                        <Button
                            Grid.Column="1"
                            Command="{Binding OpenDatePickerCommand, Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}}"
                            CommandParameter="{x:Binding Source={x:Reference picker}}"
                            FontFamily="ma"
                            FontSize="Large"
                            Text="{x:Static constant:MaterialFonts.Calendar_month}"
                            VerticalOptions="Center" />
                    </Grid>
                </Border>

I put a breakpoint when I attempt to open the popup and when it hits, it breaks

however

if I use this

JSONCopy

    Command="{Binding BindingContext.CancelDateCommand, Source={x:RelativeSource AncestorType={x:Type vm}}}"
    CommandParameter="{x:Binding Source={x:Reference picker}}"
    EventName="CancelButtonClicked" />

The app works perfectly

I think is a Maui error

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-28T00:42:38.7+00:00

Thanks for your confirmation. To further investigation, would you mind sharing the source so that I can test and reproduce the issue? Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}
Eduardo Gomez Romero 1,375 Reputation points

2024-10-28T07:47:33.18+00:00

I cannot, because I change it, I created a new page, instead of a popUp, because I notice I was using the popup as a full screen, so that defeats the purpose of a popUp
Eduardo Gomez Romero 1,375 Reputation points

2024-10-28T07:48:09.9266667+00:00

if you really want I can change it
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-29T09:28:35.18+00:00

You have removed the Relative Source but still get the same error, right? Are there any differences?

Your answer

Eduardo Gomez Romero 1,375 Reputation points

2024-10-24T11:27:33.9866667+00:00

I do not understand why
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-25T06:38:57.4666667+00:00

Could you share the source? Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}

And could you add break points to check on which line of the code you get the exception?
Eduardo Gomez Romero 1,375 Reputation points

2024-10-25T12:34:06.3+00:00

Hello

This is the line that cause the error

SQLCopy

[RelayCommand] void AddNewTurbinePopUp(SfPopup popUp) { if (popUp != null) { popUp.IsOpen = true; } }

and for some reason, the datePicker is the one casing the error

PowerShellCopy

<picker:SfDateTimePicker x:Name="picker" Grid.Row="4" Style="{x:DynamicResource DateTimePickerStyle}"> <picker:SfDateTimePicker.Behaviors> <mct:EventToCommandBehavior Command="{Binding BindingContext.CancelDateCommand, Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}}" CommandParameter="{x:Binding Source={x:Reference picker}}" EventName="CancelButtonClicked" /> <mct:EventToCommandBehavior Command="{Binding BindingContext.ConfirmDateCommand, Source={x:Reference TurbinesCollection}}" CommandParameter="{x:Binding Source={x:Reference picker}, Path=SelectedDate}" EventName="OkButtonClicked" /> </picker:SfDateTimePicker.Behaviors> </picker:SfDateTimePicker> <Border Grid.Row="1" Grid.ColumnSpan="2" Style="{x:StaticResource CommonBorderStyle}"> <Grid ColumnDefinitions="*,60"> <Entry IsReadOnly="True" Text="{x:Binding Turbine.StringifyInstalationDate}" TextColor="Black" /> <Button Grid.Column="1" Command="{Binding OpenDatePickerCommand, Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}}" CommandParameter="{x:Binding Source={x:Reference picker}}" FontFamily="ma" FontSize="Large" Text="{x:Static constant:MaterialFonts.Calendar_month}" VerticalOptions="Center" /> </Grid> </Border>

I put a breakpoint when I attempt to open the popup and when it hits, it breaks

however

if I use this

JSONCopy

Command="{Binding BindingContext.CancelDateCommand, Source={x:RelativeSource AncestorType={x:Type vm}}}" CommandParameter="{x:Binding Source={x:Reference picker}}" EventName="CancelButtonClicked" />

The app works perfectly

I think is a Maui error
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-28T00:42:38.7+00:00

Thanks for your confirmation. To further investigation, would you mind sharing the source so that I can test and reproduce the issue? Source={x:RelativeSource AncestorType={x:Type vm:TurbinesCollectionPageViewModel}}
Eduardo Gomez Romero 1,375 Reputation points

2024-10-28T07:47:33.18+00:00

I cannot, because I change it, I created a new page, instead of a popUp, because I notice I was using the popup as a full screen, so that defeats the purpose of a popUp
Eduardo Gomez Romero 1,375 Reputation points

2024-10-28T07:48:09.9266667+00:00

if you really want I can change it
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,451 Reputation points Microsoft External Staff

2024-10-29T09:28:35.18+00:00

You have removed the Relative Source but still get the same error, right? Are there any differences?

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Command breaks

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