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POCalendar binding SelectedDate and DisplayDate: gray dates
 

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  1. POCalendar binding SelectedDate and DisplayDate: gray dates
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    <p><strong>The original use case:</strong></p> <p>This is a possible use case I'm trying to solve:</p> <ol> <li>The user opens the page with my calendar set to the now date</li> <li>User selects a date a few months back</li> <li>User refreshes the page, causing the selected date in the VM to be reset to the now date</li> </ol> <p><em>Expected:</em> The calendar displays the now date</p> <p><em>Actual:</em> (with binding only on SelectedDate) The calendar only moves its selected date, but keeps showing the previously selected month</p> <p><strong>My solution:</strong></p> <p>In an MVVM scenario I am showing a <code>Calendar</code> control whose SelectedDate has a binding to a <code>SelectedDate</code> property in my ViewModel. The property in my VM triggers it's <code>PropertyChanged</code> event when set.</p> <p>The selected date in my VM can also be set from other parts in my code, so I want my calendar to always show the selected date (for example when another month is set as the selected date, I want my calendar to switch to that month). To get this behavior I also bound the <code>DisplayDate</code> property of my calendar to my SelectedDate property, and this gives me the expected behavior, except when I click on the gray dates of the previous or next month.</p> <p>This is my Calendar in XAML:</p> <pre class="lang-xml prettyprint-override"><code>&lt;Calendar SelectedDate="{Binding Path=SelectedDate}" DisplayDate="{Binding Path=SelectedDate}" /&gt; </code></pre> <p>This the <code>SelectedDate</code> property in my ViewModel (implements <code>INotifyPropertyChanged</code>)</p> <pre class="lang-cpp prettyprint-override"><code> public DateTime SelectedDate { get { return selectedDate; } set { selectedDate = value; this.PropertyChanged(this, new PropertyChangedEventArgs("SelectedDate")); } } </code></pre> <p><strong>The problem with the solution:</strong></p> <p>Apparently clicking on a gray date causes the <code>SelectedDate</code> to be set on mouse down and again on mouse up, which causes a selection of a date two months away.</p> <p>Is there a better way to implement this kind of behavior? Or can I fix the DisplayDate problem (without too much hacking, meaning no/as little code as possible in code behind)?</p> <p>All I really want is a <code>SelecteDate</code> property which also has the behavior of the <code>DisplayDate</code> property :)</p> <p>Thank you for your help!</p>
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    1. COAre you saying that you want the Calendar to always show the month (when opened) of the SelectedDate?
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    2. COYes I want the calendar to always show the Date in the SelectedDate property of my view model. This date can also change from within the view model, so I want the calendar to always jump to the selected date.
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