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    <p>Get rid of DataGridTextColumn and use DataGridTemplateColumn with CellTemplate containing a textblock bound to your multibinding, and cell editing template containing TextBox bound to FromDate, possibly via short-date converter, depending on usability you intend to achieve.</p> <p>On of possible solutions:</p> <p><strong>XAML</strong></p> <pre><code> &lt;StackPanel&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Label&gt;From time&lt;/Label&gt; &lt;DatePicker SelectedDate="{Binding FromTime}"/&gt; &lt;/StackPanel&gt; &lt;DataGrid ItemsSource="{Binding AllUsers}" AutoGenerateColumns="False"&gt; &lt;DataGrid.Resources&gt; &lt;local:TimeConverter x:Key="TimeConverter"/&gt; &lt;/DataGrid.Resources&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTemplateColumn&gt; &lt;DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate DataType="local:UserViewModel"&gt; &lt;TextBlock&gt; &lt;TextBlock.Text&gt; &lt;MultiBinding Converter="{StaticResource TimeConverter}"&gt; &lt;Binding ElementName="root" Path="DataContext.FromTime"/&gt; &lt;Binding Path="AttendTimeHour"/&gt; &lt;Binding Path="AttendTimeMinute"/&gt; &lt;/MultiBinding&gt; &lt;/TextBlock.Text&gt; &lt;/TextBlock&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellTemplate&gt; &lt;DataGridTemplateColumn.CellEditingTemplate&gt; &lt;DataTemplate DataType="local:UserViewModel"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;TextBlock&gt; &lt;Run&gt;Attend on &lt;/Run&gt; &lt;Run Text="{Binding ElementName=root, Path=DataContext.FromTime, StringFormat=d}"/&gt; &lt;Run&gt; at &lt;/Run&gt; &lt;/TextBlock&gt; &lt;TextBox Text="{Binding AttendTimeHour}"/&gt;&lt;TextBlock&gt;:&lt;/TextBlock&gt; &lt;TextBox Text="{Binding AttendTimeMinute}"/&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellEditingTemplate&gt; &lt;/DataGridTemplateColumn&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; &lt;/StackPanel&gt; </code></pre> <p><strong>View model (UserViewModel) part:</strong></p> <pre><code> private DateTime _attendTime; public DateTime AttendTime { get { return _attendTime; } set { if (value == _attendTime) return; _attendTime = value; OnPropertyChanged(); OnPropertyChanged("AttendTimeHour"); OnPropertyChanged("AttendTimeMinute"); } } public int AttendTimeHour { get { return attendTimeHour; } set { if (value.Equals(attendTimeHour)) return; attendTimeHour = value; AttendTime = new DateTime(AttendTime.Year, AttendTime.Month, AttendTime.Day, AttendTimeHour, AttendTime.Minute, AttendTime.Second); OnPropertyChanged(); } } private int _attendTimeMinute; public int AttendTimeMinute { get { return _attendTimeMinute; } set { if (value == _attendTimeMinute) return; _attendTimeMinute = value; AttendTime = new DateTime(AttendTime.Year, AttendTime.Month, AttendTime.Day, AttendTime.Hour, AttendTimeMinute, AttendTime.Second); OnPropertyChanged(); } } </code></pre> <p><strong>And the converter</strong></p> <pre><code> public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) { if (values.Length &lt; 2) return null; if (!(values[0] is DateTime &amp;&amp; values[1] is int &amp;&amp; values[2] is int)) return null; var fromDate = (DateTime) values[0]; var attendTimeHour = (int) values[1]; var attendTimeMinutes = (int)values[2]; var result = new DateTime(fromDate.Year, fromDate.Month, fromDate.Day, attendTimeHour, attendTimeMinutes, 0); return result.ToString(); } </code></pre>
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    1. PODataGridTextColumn showing/editing time only, date bound to property of parent usercontrol
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    1. PTAnswer
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    1. COWon't the user still have to enter a complete datetime, instead of just the time?
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      1. USZev Spitz
    2. COIn case of celleditingtemplate in the template column you have the full control about how your UI will be presented to the user, so what a user HAVE to enter depends only on what developer has given him in the UI. I've updated my answer with a simple example of one of possible variants. There is some tricks due to immutable nature of DateTime, but I think you'll catch the ided
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