failed to convert value Telerik.Windows.Controls.SelectionRange

[Rav]

Hi Telerik,

I'm getting the following error when using RadTimeBar

System.Windows.Data Error: 'MS.Internal.Data.DynamicValueConverter' converter failed to convert value 'Telerik.Windows.Controls.SelectionRange`1[System.Double]' (type 'Telerik.Windows.Controls.SelectionRange`1[System.Double]'); BindingExpression: Path='ActualVisiblePeriodRange' DataItem='Telerik.Windows.Controls.RadTimeBar' (HashCode=29235797); target element is 'Telerik.Windows.Controls.RadSlider' (Name='PART_Slider'); target property is 'Selection' (type 'Telerik.Windows.Controls.SelectionRange`1[System.Double]').. System.InvalidOperationException: Can't convert type Telerik.Windows.Controls.SelectionRange`1[System.Double] to type Telerik.Windows.Controls.SelectionRange`1[System.Double].
   at MS.Internal.Data.DefaultValueConverter.Create(Type sourceType, Type targetType, Boolean targetToSource)
   at MS.Internal.Data.DynamicValueConverter.EnsureConverter(Type sourceType, Type targetType)
   at MS.Internal.Data.DynamicValueConverter.Convert(Object value, Type targetType, Object parameter, CultureInfo culture)
   at System.Windows.Data.BindingExpression.ConvertToTarget(Object value).

This is the XAML

<telerik:RadTimeBar Grid.Row="1" IsSnapToIntervalEnabled="True"
                PeriodStart="{Binding PeriodStart, Mode=TwoWay}"
                PeriodEnd="{Binding PeriodEnd, Mode=TwoWay}"
                VisiblePeriodStart="{Binding VisiblePeriodStart, Mode=TwoWay}"
                VisiblePeriodEnd="{Binding VisiblePeriodEnd, Mode=TwoWay}"
                SelectionStart="{Binding SelectionStart, Mode=TwoWay}"
                SelectionEnd="{Binding SelectionEnd, Mode=TwoWay}">
                <telerik:RadTimeBar.Intervals>
                    <telerik:YearInterval />
                    <telerik:MonthInterval />
                    <telerik:WeekInterval />
                    <telerik:DayInterval />
                </telerik:RadTimeBar.Intervals>
                <telerik:RadColumnSparkline ItemsSource="{Binding Statistics}" XValuePath="CompletedDate" YValuePath="NumberCompleted" />
            </telerik:RadTimeBar>

And this is the ViewModel

public Dashboard04ViewModel()
        {
            var rand = new Random();
            var start = DateUtilities.GetStartOfCurrentYear();

            Statistics = new List<ProgramCompletionStatistic>();
            while (start < DateUtilities.GetEndOfCurrentYear())
            {
                var randNum = (int) (rand.NextDouble()*15);

                Statistics.Add(
                    new ProgramCompletionStatistic
                        {
                            CompletedDate = start,
                            NumberCompleted = randNum
                        });

                start = start.AddDays(1);
            }
            //NotifyPropertyChanged("Statistics");

            PeriodStart = DateUtilities.GetStartOfCurrentYear();
            PeriodEnd = DateUtilities.GetEndOfCurrentMonth();
            VisiblePeriodStart = DateUtilities.GetStartOfCurrentWeek();
            VisiblePeriodEnd = DateUtilities.GetEndOfCurrentWeek();
            SelectionStart = DateUtilities.GetStartOfCurrentWeek();
            SelectionEnd = DateUtilities.GetEndOfCurrentWeek();

            if (!Designer.IsInDesignMode)
            {
            }
        }

        #endregion

        #region Public Methods/Properties

        public List<ProgramCompletionStatistic> Statistics { get; set; }

        private DateTime _periodStart;
        public DateTime PeriodStart
        {
            get { return _periodStart; }
            set
            {
                _periodStart = value;
                NotifyPropertyChanged("PeriodStart");
            }
        }

        private DateTime _periodEnd;
        public DateTime PeriodEnd
        {
            get { return _periodEnd; }
            set
            {
                _periodEnd = value;
                NotifyPropertyChanged("PeriodEnd");
            }
        }

        private DateTime _visiblePeriodStart;
        public DateTime VisiblePeriodStart
        {
            get { return _visiblePeriodStart; }
            set
            {
                _visiblePeriodStart = value;
                NotifyPropertyChanged("VisiblePeriodStart");
            }
        }

        private DateTime _visiblePeriodEnd;
        public DateTime VisiblePeriodEnd
        {
            get { return _visiblePeriodEnd; }
            set
            {
                _visiblePeriodEnd = value;
                NotifyPropertyChanged("VisiblePeriodEnd");
            }
        }

        private DateTime _selectionStart;
        public DateTime SelectionStart
        {
            get { return _selectionStart; }
            set
            {
                _selectionStart = value;
                NotifyPropertyChanged("SelectionStart");
            }
        }

        private DateTime _selectionEnd;
        public DateTime SelectionEnd
        {
            get { return _selectionEnd; }
            set
            {
                _selectionEnd = value;
                NotifyPropertyChanged("SelectionEnd");
            }
        }

Could you please help? I assume it is to do with binding the dates?

Rav

[Rav]

could it be something to do with my DateTime formatting? I am in Australia.

[Missing User]

Hello Rav Panchalingam,

Thank you for the detailed explanation and the code snippets. However, it is hard for me to determine the cause of the issue from the information provided. Could you please open a new formal thread (Support thread) and send us a sample runnable project (where this issue occurs) with dummy data? We will debug it locally, and advise you further.

Regards,

Polina

the Telerik team