Unplanned
Last Updated: 27 Apr 2022 07:28 by Al

Run the attached project and select a new value from the drop down for RadTimePicker:

 

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.RadTimePickerElement.set_Value(Object value) in C:\Work\Development\RadControls\RadControlsUI\RadTimePicker\Elements\RadTimePickerElement.cs:line 594
   at Telerik.WinControls.UI.RadTimePickerContentElement.element_Click(Object sender, EventArgs e) in C:\Work\Development\RadControls\RadControlsUI\RadTimePicker\Elements\ContentPart\RadTimePickerContentElement.cs:line 585
   at Telerik.WinControls.RadElement.OnClick(EventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 5094
   at Telerik.WinControls.RadElement.DoClick(EventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 5158
   at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 4272
   at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadItem.cs:line 779
   at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 4179
   at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 5271
   at Telerik.WinControls.RadElement.CallDoMouseUp(MouseEventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Element\RadElement.cs:line 5493
   at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Control\ComponentInputBehavior.cs:line 75
   at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e) in C:\Work\Development\RadControls\RadControl\TPF\Control\RadControl.cs:line 1206
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m) in C:\Work\Development\RadControls\RadControl\TPF\Control\RadControl.cs:line 1554
   at Telerik.WinControls.UI.RadPopupControlBase.WndProc(Message& m) in C:\Work\Development\RadControls\RadControlsUI\GenericPopup\RadPopupControlBase.cs:line 795
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Workaround:

        Timer t = new Timer();

        private void RadTimePicker1_ValueChanged(object sender, EventArgs e)
        {
            if (radTimePicker1.Value == null) return;

            var timeval = ((DateTime)radTimePicker1.Value).TimeOfDay;

            if (timeval == TimeSpan.Zero)
            {
                t = new Timer();
                t.Interval = 500;
                t.Tick += T_Tick; t.Start();
            }
        }

        private void T_Tick(object sender, EventArgs e)
        {
            t.Stop();
            this.radTimePicker1.ValueChanged -= RadTimePicker1_ValueChanged;
            this.radTimePicker1.Value = null;
            this.radTimePicker1.ValueChanged += RadTimePicker1_ValueChanged;
        }

Unplanned
Last Updated: 22 Jul 2021 07:34 by ADMIN
Currently, RadDateTimePicker offers a Value property, typeof(DateTime) even though the control is designed to manage only date and only time values.

With releasing .NET 6, there are TimeOnly and DateOnly types which would be more appropriate for managing such values:

https://devblogs.microsoft.com/dotnet/date-time-and-time-zone-enhancements-in-net-6/   
Unplanned
Last Updated: 21 Jul 2021 08:17 by ADMIN
Created by: Ketan
Comments: 0
Category: TimePicker
Type: Feature Request
0

Currently, RadTimePicker offers a Value property, typeof(DateTime?) even though the control is designed to manage time values.

With releasing .NET 6, there is TimeOnly type which would be more appropriate for managing time values:

https://devblogs.microsoft.com/dotnet/date-time-and-time-zone-enhancements-in-net-6/ 

Completed
Last Updated: 20 Jul 2021 11:05 by ADMIN
Release R3 2021
The calendar selection is not synced with the value after a paste operation.
Unplanned
Last Updated: 14 Jun 2021 14:21 by ADMIN
Clicking on the 'Set Time Picker Culture' button causes the 'ValueChanged' event to be fired twice. But same does not happen with the DateTime picker.

Thanks
Unplanned
Last Updated: 15 Mar 2021 16:01 by ADMIN
Created by: Erich
Comments: 0
Category: TimePicker
Type: Feature Request
0

For example:

//from 22:00 till 07:00 the next day.
this.radTimePicker1.MinValue = DateTime.Today.Date.AddHours(22);
this.radTimePicker1.MaxValue = DateTime.Today.Date.AddDays(1).AddHours(7);