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    <p>two weeks ago, I was facing the same issue.</p> <p>I came up with a solution, after seeing this blog by Josh Smith.</p> <p><a href="http://joshsmithonwpf.wordpress.com/2008/10/08/binding-to-validationerrors0-without-creating-debug-spew/" rel="noreferrer">http://joshsmithonwpf.wordpress.com/2008/10/08/binding-to-validationerrors0-without-creating-debug-spew/</a></p> <p>The trick is to define a DataTemplate to render the ValidationError object and then use a ContentPresenter to display the error message. If there is no error, then the ContentPresenter will not be displayed. </p> <p>Below, I have shared the code of the sample app that I created. </p> <p><img src="https://i.stack.imgur.com/q1Aeu.png" alt="Without errors"> <img src="https://i.stack.imgur.com/uGsZk.png" alt="With errors"></p> <p>Here is the 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" SizeToContent="WidthAndHeight" Title="MainWindow"&gt; &lt;StackPanel Margin="5"&gt; &lt;StackPanel.Resources&gt; &lt;DataTemplate DataType="{x:Type ValidationError}"&gt; &lt;TextBlock Text="{Binding ErrorContent}" Foreground="White" Background="Red" VerticalAlignment="Center" FontWeight="Bold"/&gt; &lt;/DataTemplate&gt; &lt;/StackPanel.Resources&gt; &lt;TextBox Name="TextBox1" Text="{Binding Text1, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"/&gt; &lt;ContentPresenter Content="{Binding ElementName= TextBox1, Path=(Validation.Errors).CurrentItem}" HorizontalAlignment="Left"/&gt; &lt;TextBox Name="TextBox2" Text="{Binding Text2, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"/&gt; &lt;ContentPresenter Content="{Binding ElementName= TextBox2, Path=(Validation.Errors).CurrentItem}" HorizontalAlignment="Left"/&gt; &lt;Button Content="Validate" Click="Button_Click"/&gt; &lt;/StackPanel&gt; &lt;/Window&gt; </code></pre> <p>The code behind file:</p> <pre><code>namespace WpfApplication1 { /// &lt;summary&gt; /// Interaction logic for MainWindow.xaml /// &lt;/summary&gt; public partial class MainWindow : Window { private ViewModel _ViewModel = null; public MainWindow() { InitializeComponent(); _ViewModel = new ViewModel(); DataContext = _ViewModel; } private void Button_Click(object sender, RoutedEventArgs e) { _ViewModel.Validate = true; _ViewModel.OnPropertyChanged("Text1"); _ViewModel.OnPropertyChanged("Text2"); } } } </code></pre> <p>The ViewModel:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ComponentModel; namespace WpfApplication1 { public class ViewModel : INotifyPropertyChanged, IDataErrorInfo { private string _Text1; public string Text1 { get { return _Text1; } set { _Text1 = value; OnPropertyChanged("Text1"); } } private string _Text2; public string Text2 { get { return _Text2; } set { _Text2 = value; OnPropertyChanged("Text2"); } } public bool Validate { get; set; } #region INotifyPropertyChanged Implemenation public event PropertyChangedEventHandler PropertyChanged; public void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } #endregion #region IDataErrorInfo Implementation public string Error { get { return null; } } public string this[string columnName] { get { string errorMessage = string.Empty; if (Validate) { switch (columnName) { case "Text1": if (Text1 == null) errorMessage = "Text1 is mandatory."; else if (Text1.Trim() == string.Empty) errorMessage = "Text1 is not valid."; break; case "Text2": if (Text2 == null) errorMessage = "Text2 is mandatory."; else if (Text2.Trim() == string.Empty) errorMessage = "Text2 is not valid."; break; } } return errorMessage; } } #endregion } } </code></pre>
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    1. COThanks for the answer. I had forgotten to check to see if there were any responses. The sample you provided did exactly what I was trying to accomplish.
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      1. USJason Richmeier
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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