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POwpf custom user control
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/7223345/wpf-custom-datepicker-user-control">Wpf custom datepicker user control</a> </p> </blockquote> <p>i want to create a user control for getting date from user that have 3 textbox for year, month and day but i dont know how to create it. please help me</p> <pre><code>&lt;UserControl x:Class="UI.WPF.CustomControls.ChooseDateControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" x:Name="chooseDateControl" xmlns:custom="clr-namespace:UI.WPF.CustomControls" d:DesignHeight="26" d:DesignWidth="181" FontFamily="Tahoma"&gt; &lt;DockPanel LastChildFill="True"&gt; &lt;Grid&gt; &lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition Width="1.5*" /&gt; &lt;ColumnDefinition Width="14" /&gt; &lt;ColumnDefinition Width="1*" /&gt; &lt;ColumnDefinition Width="14" /&gt; &lt;ColumnDefinition Width="1*" /&gt; &lt;/Grid.ColumnDefinitions&gt; &lt;Label Content="/" Grid.Column="1" /&gt; &lt;Label Content="/" Grid.Column="3" /&gt; &lt;custom:NumericTextBox x:Name="txtYear" ToolTip="سال" Text="{Binding ElementName=chooseDateControl, Mode=TwoWay, Path=Year}" MaxLength="4" TabIndex="2" MinWidth="20" /&gt; &lt;custom:NumericTextBox x:Name="txtMonth" Grid.Column="2" ToolTip="ماه" Text="{Binding ElementName=chooseDateControl, Mode=TwoWay, Path=Month}" MaxLength="2" TabIndex="1" MinWidth="20" /&gt; &lt;custom:NumericTextBox x:Name="txtDay" Grid.Column="4" ToolTip="روز" Text="{Binding ElementName=chooseDateControl, Mode=TwoWay, Path=Day}" MaxLength="2" TabIndex="0" MinWidth="20" /&gt; &lt;/Grid&gt; &lt;/DockPanel&gt; </code></pre> <p>and this is the code behind:</p> <pre><code>public partial class ChooseDateControl : UserControl { public static readonly DependencyProperty ValueProperty; public static readonly DependencyProperty YearProperty; public static readonly DependencyProperty MonthProperty; public static readonly DependencyProperty DayProperty; static ChooseDateControl() { ValueProperty = DependencyProperty.Register( "Value", typeof(DateTime), typeof(ChooseDateControl), new FrameworkPropertyMetadata(DateTime.MinValue)); ValueProperty = DependencyProperty.Register( "Year", typeof(int), typeof(ChooseDateControl), new FrameworkPropertyMetadata((int)0, new PropertyChangedCallback(OnYearChanged))); ValueProperty = DependencyProperty.Register( "Month", typeof(int), typeof(ChooseDateControl), new FrameworkPropertyMetadata((int)0, new PropertyChangedCallback(OnMonthChanged))); ValueProperty = DependencyProperty.Register( "Day", typeof(int), typeof(ChooseDateControl), new FrameworkPropertyMetadata((int)0, new PropertyChangedCallback(OnDayChanged))); } public ChooseDateControl() { InitializeComponent(); } private static void OnDayChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { DateTime newDate = (DateTime)e.NewValue; DateTime oldDate = (DateTime)e.OldValue; NumericTextBox dayPicker = (NumericTextBox)sender; dayPicker.Text = newDate.Day.ToString(); } private static void OnMonthChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { DateTime newDate = (DateTime)e.NewValue; DateTime oldDate = (DateTime)e.OldValue; NumericTextBox monthPicker = (NumericTextBox)sender; monthPicker.Text = newDate.Month.ToString(); } private static void OnYearChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { DateTime newDate = (DateTime)e.NewValue; DateTime oldDate = (DateTime)e.OldValue; NumericTextBox yearPicker = (NumericTextBox)sender; yearPicker.Text = newDate.Year.ToString(); } public DateTime Value { get { return (DateTime)base.GetValue(ValueProperty); } set { base.SetValue(ValueProperty, value); } } public int Year { get { return (int)base.GetValue(YearProperty); } set { base.SetValue(YearProperty, value); } } public int Month { get { return (int)base.GetValue(MonthProperty); } set { base.SetValue(MonthProperty, value); } } public int Day { get { return (int)base.GetValue(DayProperty); } set { base.SetValue(DayProperty, value); } } } </code></pre> <p>it don't work correctly and return the default value that is the DateTime.MinValue. i know this is wrong. please help me</p>
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