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plurals

POBinding is not updated as expected
primarykey
Id
3651353
data
AcceptedAnswerId
3651432
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-09-06T12:15:36.020
FavoriteCount
0
LastActivityDate
2010-09-06T12:34:23.587
LastEditDate
2010-09-06T12:24:18.763
LastEditorUserId
214071
OwnerUserId
145757
ParentId
0
PostTypeId
1
Score
3
ViewCount
1917
LastEditorDisplayName
text
Body
I'm building a simple UserControl, DoubleDatePicker, which defines a DependencyProperty, SelectedDate : DoubleDatePicker.xaml : <pre><code><UserControl x:Class="TestWpfDoubleDatePicker.DoubleDatePicker" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit"> <StackPanel x:Name="LayoutRoot" Background="White"> <toolkit:DatePicker x:Name="DateInput" SelectedDate="{Binding SelectedDate,Mode=TwoWay}" Margin="5,0,5,0" /> <TextBlock Text="{Binding SelectedDate}" /> <toolkit:DatePicker SelectedDate="{Binding SelectedDate,Mode=TwoWay}" Margin="5,0,5,0" /> </StackPanel> </code></pre> DoubleDatePicker.xaml.cs : <pre><code>using System; using System.Windows; using System.Windows.Controls; namespace TestWpfDoubleDatePicker { public partial class DoubleDatePicker : UserControl { public static readonly DependencyProperty SelectedDateProperty = DependencyProperty.Register("SelectedDate", typeof(DateTime), typeof(DoubleDatePicker), null); public DateTime SelectedDate { get { return (DateTime)this.GetValue(SelectedDateProperty); } set { this.SetValue(SelectedDateProperty, value); } } public DoubleDatePicker() { this.InitializeComponent(); this.DataContext = this; } } } </code></pre> I'd like to be able to bind the SelectedDate property from the outside but things do not seem so simple. Here is a sample code that is trying to get the value of the property in a TextBlock : MainWindow.xaml : <pre><code><Window x:Class="TestWpfDoubleDatePicker.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:TestWpfDoubleDatePicker" Title="MainWindow" Height="350" Width="525"> <StackPanel x:Name="LayoutRoot" Background="White"> <local:DoubleDatePicker x:Name="ddp" SelectedDate="{Binding SelectedDate}" /> <Button Content="Update" Click="Button_Click" /> <TextBlock Text="{Binding SelectedDate}" /> </StackPanel> </code></pre> and MainWindow.xaml.cs : <pre><code>using System; using System.Windows; namespace TestWpfDoubleDatePicker { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public static readonly DependencyProperty SelectedDateProperty = DependencyProperty.Register("SelectedDate", typeof(DateTime), typeof(MainWindow), null); public DateTime SelectedDate { get { return (DateTime)this.GetValue(SelectedDateProperty); } set { this.SetValue(SelectedDateProperty, value); } } public MainWindow() { InitializeComponent(); this.DataContext = this; } private void Button_Click(object sender, RoutedEventArgs e) { this.SelectedDate = this.ddp.SelectedDate; } } } </code></pre> Inside the DoubleDatePicker itself all is working fine : the SelectedDate property is updated when changed by using any of the two DatePicker, and the TextBlock of the DoubleDatePicker is updated as expected. But, outside, the TextBlock of the MainWindow is not updated automatically and the only way to get the SelectedDate property of the DoubleDatePicker is to get it explicitly, like it's done when clicking the Button. What am I doing wrong ? I'm using Visual Studio Professional 2010 with WPF 4. Thanks in advance for you help.
Tags
<wpf><data-binding><user-controls><binding>
Title
Binding is not updated as expected
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USDave
UserOwnerUserId
1. USPragmateek
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POBinding is not updated as expected
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 POBinding is not updated as expected
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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