Validation with EF4.1 and DataAnnotations

[Mike]

Hi,
i have spent the last two days two find out how the validation works in the dataform. My DAL uses Entity Framework 4.1 with auto generated POCO Entities (in a seperate Assembly).
I'm working with MVVM and have UserControls for my views. One UserControl has a RadDataFrom with customized fields. The currentItem is bound to a an instance of my POCO Entities. Now i'd like to use DataAnnotations in the entities for my validatioin. But the error are not displayed in the dataform. I don't know what i'm doing wrong, can you please help me?
Here is the UserControl containing the dataform and the corresponding POCO:

<UserControl xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"  x:Class="MiexProto.Views.EmployeeFormView"
             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="me"
             d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <DataTemplate x:Key="EmployeeTemplate">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition/>
                    <RowDefinition/>
                    <RowDefinition/>
                </Grid.RowDefinitions>
                <StackPanel Orientation="Horizontal" Grid.Row="0" Grid.Column="0">
                    <Label Content="Anrede"/>
                    <telerik:DataFormComboBoxField Height="auto"  DataMemberBinding="{Binding AnredeId, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" SelectedValuePath="AnredeId" DisplayMemberPath="Bezeichnung" ItemsSource="{Binding ElementName=me, Path=DataContext.ListAnrede}" />
                </StackPanel>
                <StackPanel Orientation="Horizontal"  Grid.Row="0" Grid.Column="1">
                    <Label Content="Titel" />
                    <telerik:DataFormComboBoxField Height="Auto" DataMemberBinding="{Binding Titel.Bezeichnung, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" DisplayMemberPath="Bezeichnung" ItemsSource="{Binding ElementName=me, Path=DataContext.ListTitel}" />
                </StackPanel>
                <telerik:DataFormCheckBoxField Grid.Row="0" Grid.Column="2" Label="Deaktiviert" DataMemberBinding="{Binding Deaktiviert, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" />
                <telerik:DataFormDataField Grid.Row="1" Grid.Column="0" Label="Nachname" DataMemberBinding="{Binding Nachname, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" />
                <telerik:DataFormDataField Grid.Row="1" Grid.Column="1" Label="Vorname" DataMemberBinding="{Binding Vorname, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" />
                <telerik:DataFormDataField Grid.Row="2" Grid.Column="0" Label="Durchwahl" DataMemberBinding="{Binding Durchwahl, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}" />
                <telerik:DataFormDataField Grid.Row="2" Grid.Column="1" Label="Mobilnummer" DataMemberBinding="{Binding Mobilnummer, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True, ValidatesOnDataErrors=True}" />
            </Grid>
        </DataTemplate>

    </UserControl.Resources>
    <Grid>
        <telerik:RadDataForm CurrentItem="{Binding Employee}" Header="{Binding Employee.Nachname}" AutoEdit="True" CommandButtonsVisibility="None" EditTemplate="{StaticResource EmployeeTemplate}" AutoGenerateFields="False" />
    </Grid>
</UserControl>

namespace Entities
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;

    public partial class Mitarbeiter
    {
        public Mitarbeiter()
        {
            this.Veranstaltungsanmeldung = new HashSet<Veranstaltungsanmeldung>();
            this.Zustaendigkeit = new HashSet<Zustaendigkeit>();
        }

        public int MitarbeiterId { get; set; }
        public int KundeId { get; set; }
        public int AnredeId { get; set; }
        public int TitelId { get; set; }
        public string Vorname { get; set; }
        public string Nachname { get; set; }
        public string Durchwahl { get; set; }
        public string Email { get; set; }
        [Required(AllowEmptyStrings = false, ErrorMessage = "Es muss eine Handynummer angegeben werden!")]
        [Display(Name = "Kunde")]
        [RegularExpression("^\\+(\\d+)\\s\\((\\d+)\\)\\s(\\d+)(\\s-\\s(\\d+))?", ErrorMessage = "Die Telefonnummer muss im Format +43 (XXX) XXXXX - XX sein")]
        public string Mobilnummer { get; set; }
        public bool Deaktiviert { get; set; }
        public string Bild { get; set; }
        public System.DateTime UpdateDatum { get; set; }
        public string UpdateBenutzer { get; set; }

        public virtual Anrede Anrede { get; set; }
        public virtual Kunde Kunde { get; set; }
        public virtual Titel Titel { get; set; }
        public virtual ICollection<Veranstaltungsanmeldung> Veranstaltungsanmeldung { get; set; }
        public virtual ICollection<Zustaendigkeit> Zustaendigkeit { get; set; }
    }
}

[Pavel Pavlov]

Hi Michael,

I have prepared a small sample illustrating how this can be achieved. Please find it attached. To give it a try - just run the project and try entering e.g. a number in the FirstName field.

Regards,
Pavel Pavlov
the Telerik team

[Mike]

Thank's a lot, that did the job!