DatePickerDateValidationErrorEventArgs Class
Provides data for the DatePicker.DateValidationError event.
Assembly: PresentationFramework (in PresentationFramework.dll)
| Name | Description | |
|---|---|---|
![]() | DatePickerDateValidationErrorEventArgs(Exception, String) | Initializes a new instance of the DatePickerDateValidationErrorEventArgs class. |
| Name | Description | |
|---|---|---|
![]() | Exception | Gets the initial exception associated with the DateValidationError event. |
![]() | Text | Gets or sets the text that caused the DateValidationError event. |
![]() | ThrowException | Gets or sets a value that indicates whether Exception should be thrown. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
The DatePicker.DateValidationError event occurs when DatePicker.Text is set to a value that cannot be interpreted as a date or when the date cannot be selected. You can subscribe to this event and specify whether an exception is raised by setting the ThrowException property. If DatePickerDateValidationErrorEventArgs.ThrowException is true, one of the following exceptions is raised:
Exception type | Condition |
|---|---|
The text entered cannot be parsed to a valid date, and the exception is not suppressed. | |
The text entered parses to a date that is not selectable. |
If DatePickerDateValidationErrorEventArgs.ThrowException is false, the application continues execution as usual.
The following example creates a DatePicker that displays the dates in August 2009 and specifies that each Saturday and Sunday is not selectable. The DatePicker handles the DateValidationError event. If the user enters a date that is not selectable, the example displays a message. If the user enters text that is not a valid date, an exception is thrown.
Dim datePickerWithBlackoutDates As New DatePicker() datePickerWithBlackoutDates.DisplayDateStart = New DateTime(2009, 8, 1) datePickerWithBlackoutDates.DisplayDateEnd = New DateTime(2009, 8, 31) datePickerWithBlackoutDates.SelectedDate = New DateTime(2009, 8, 10) datePickerWithBlackoutDates.BlackoutDates.Add( _ New CalendarDateRange(New DateTime(2009, 8, 1), New DateTime(2009, 8, 2))) datePickerWithBlackoutDates.BlackoutDates.Add( _ New CalendarDateRange(New DateTime(2009, 8, 8), New DateTime(2009, 8, 9))) datePickerWithBlackoutDates.BlackoutDates.Add( _ New CalendarDateRange(New DateTime(2009, 8, 15), New DateTime(2009, 8, 16))) datePickerWithBlackoutDates.BlackoutDates.Add( _ New CalendarDateRange(New DateTime(2009, 8, 22), New DateTime(2009, 8, 23))) datePickerWithBlackoutDates.BlackoutDates.Add( _ New CalendarDateRange(New DateTime(2009, 8, 29), New DateTime(2009, 8, 30))) AddHandler datePickerWithBlackoutDates.DateValidationError, _ AddressOf DatePicker_DateValidationError ' root is a Panel that is defined elsewhere. root.Children.Add(datePickerWithBlackoutDates)
<DatePicker Name="datePickerWithBlackoutDates" DisplayDateStart="8/1/09" DisplayDateEnd="8/31/09" SelectedDate="8/10/09" DateValidationError="DatePicker_DateValidationError"> <DatePicker.BlackoutDates> <CalendarDateRange Start="8/1/09" End="8/2/09"/> <CalendarDateRange Start="8/8/09" End="8/9/09"/> <CalendarDateRange Start="8/15/09" End="8/16/09"/> <CalendarDateRange Start="8/22/09" End="8/23/09"/> <CalendarDateRange Start="8/29/09" End="8/30/09"/> </DatePicker.BlackoutDates> </DatePicker>
' If the text is a valid date, but a part of the ' BlackoutDates collection, show a message. ' If the text is not a valid date, thow an exception. Private Sub DatePicker_DateValidationError(ByVal sender As Object, _ ByVal e As DatePickerDateValidationErrorEventArgs) Dim newDate As DateTime Dim datePickerObj As DatePicker = TryCast(sender, DatePicker) If DateTime.TryParse(e.Text, newDate) Then If datePickerObj.BlackoutDates.Contains(newDate) Then MessageBox.Show([String].Format("The date, {0}, cannot be selected.", e.Text)) End If Else e.ThrowException = True End If End Sub
Available since 4.0
Silverlight
Available since 2.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


