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    <p>One idea for the solution is to have another property with only a getter that merges the info you want. </p> <p>something like</p> <pre><code>property string Time {get {return this.FromDate.toshortdate().tostring() + AttendDate.hour.tostring() + attenddate.minutes.tostring()}; } </code></pre> <p>The code might be not exactly this, but then you can bind this property to show the info you want where it should be presented.</p> <p>regards,</p> <p><strong>=============EDIT===========</strong></p> <p>I tried this, a very simple example...don't know if it works for you:</p> <p>XAML:</p> <pre><code>&lt;Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:conv ="clr-namespace:WpfApplication1" Title="MainWindow" Height="350" Width="525"&gt; &lt;Window.Resources&gt; &lt;conv:TimeConverter x:Key="tmeConverter"&gt;&lt;/conv:TimeConverter&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;DataGrid ItemsSource="{Binding listExample}"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTextColumn Header="teste" &gt; &lt;DataGridTextColumn.Binding&gt; &lt;MultiBinding Converter="{StaticResource tmeConverter}"&gt; &lt;Binding Path="FromDate" /&gt; &lt;Binding Path="AttendDate" /&gt; &lt;/MultiBinding&gt; &lt;/DataGridTextColumn.Binding&gt; &lt;/DataGridTextColumn&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>Code behind (.cs)</p> <pre><code>namespace WpfApplication1 { /// &lt;summary&gt; /// Interaction logic for MainWindow.xaml /// &lt;/summary&gt; public partial class MainWindow : Window { public List&lt;Example2&gt; listExample { get; set; } public Example2 Test { get; set; } public MainWindow() { InitializeComponent(); this.listExample = new List&lt;Example2&gt;(); //listExample.Add(new Example { IsChecked = false, Test1 = "teste" }); //listExample.Add(new Example { IsChecked = false, Test1 = "TTTTT!" }); this.Test = new Example2 { AttendDate = "1ui", FromDate = "ff" }; this.listExample.Add(this.Test); DataContext = this; } } } </code></pre> <p>And Example2 class:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace WpfApplication1 { public class Example2 { public string FromDate { get; set; } public string AttendDate { get; set; } } } </code></pre> <p>Converter:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Data; namespace WpfApplication1 { class TimeConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { return values[0].ToString() + values[1].ToString(); } public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } } } </code></pre> <p>The final window appears 3 columns, and if I change the last two columns, the first one is automatically edited.</p> <p>Is that it?</p>
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    1. PODataGridTextColumn showing/editing time only, date bound to property of parent usercontrol
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    1. COI have no problem displaying the value with a customized format; that I can do with a MultiBinding. My issue is that the actual value needs to be changed in accordance with the value of the `AttendDate` property.
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    2. COThen, you must implement INotifyPropertyChanged. Check http://stackoverflow.com/questions/16787757/how-to-uncheck-all-checkbox-in-side-datatemplate-of-gridcontrol-on-button-click/16788035#16788035 , the part that has the Example Class.
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    3. COOne question, have you tried the <Binding Path="AttendDate" Mode="TwoWay" ElementName="UC" /> ?
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