验证viewmodel + Catel

时间:2015-07-20 19:19:57

标签: validation mvvm viewmodel catel

我试图在Catel中的viewModel上实现验证。

我阅读了文档,它看起来很简单,但不知怎的,我可能会错过这个特殊情况的东西。我有一个用户控件,其中嵌有两个用户控件。一个是用户控件,我将用作自定义命令栏,另一个是模型的详细视图。

<catel:UserControl x:Class="SICUAP.Views.CatProducto_CategoriasView"
               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:catel="http://catel.codeplex.com"
               xmlns:Views="clr-namespace:SICUAP.Views">

<!-- Resources -->
<UserControl.Resources>
</UserControl.Resources>

<!-- Content -->
<catel:StackGrid>
    <catel:StackGrid.RowDefinitions>
        <RowDefinition></RowDefinition>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
    </catel:StackGrid.RowDefinitions>
    <Views:cmdGlobalesBDView></Views:cmdGlobalesBDView>
    <Label Content="Catalogo de Categorias de Producto" Style="{StaticResource estiloTituloControl}">
    </Label>
    <Views:dataProducto_CategoriasView />

</catel:StackGrid>

命令栏只有一个按钮,可以绑定全局命令。

<Button Width="50" Height="50" VerticalAlignment="Center" HorizontalAlignment="Center" ToolTip="Salvar" Command="{catel:CommandManagerBinding Salvar}"
                    Style="{StaticResource MetroCircleButtonStyle}">
        <Rectangle Width="20" Height="20" Fill="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Button}}}" >
            <Rectangle.OpacityMask>
                <VisualBrush Stretch="Fill" Visual="{StaticResource appbar_save}" />
            </Rectangle.OpacityMask>
        </Rectangle>
    </Button>

这是详细视图

<catel:UserControl x:Class="SICUAP.Views.dataProducto_CategoriasView"
               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:catel="http://catel.codeplex.com">
<UserControl.Resources>
</UserControl.Resources>
<catel:StackGrid>
    <catel:StackGrid.RowDefinitions>
        <RowDefinition Height="Auto" />
    </catel:StackGrid.RowDefinitions>
    <GroupBox Header="Datos de la Categoria del Producto">
        <catel:StackGrid>
            <catel:StackGrid.RowDefinitions>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
            </catel:StackGrid.RowDefinitions>
            <catel:StackGrid.ColumnDefinitions>
                <ColumnDefinition Width="300"></ColumnDefinition>
                <ColumnDefinition Width="100"></ColumnDefinition>
                <ColumnDefinition Width="200"></ColumnDefinition>
            </catel:StackGrid.ColumnDefinitions>
            <Label Content="Nombre:"></Label>
            <Label Content="Activo:"></Label>
            <catel:EmptyCell></catel:EmptyCell>
            <TextBox Margin="5" Text="{Binding Nombre, ValidatesOnDataErrors=True, NotifyOnValidationError=True}"></TextBox>
            <CheckBox Margin="5" IsChecked="{Binding Activo}"></CheckBox>
            <catel:EmptyCell></catel:EmptyCell>
            <Label Content="Descripcion:"></Label>
            <catel:EmptyRow></catel:EmptyRow>
            <TextBox Margin="5" TextWrapping="Wrap" AcceptsReturn="True" Grid.ColumnSpan="3" Height="200" Text="{Binding Descr,ValidatesOnDataErrors=True, NotifyOnValidationError=True}"></TextBox>
        </catel:StackGrid>
    </GroupBox>
</catel:StackGrid>

我创建命令并将其绑定到详细视图模型的构造函数上的验证摘要。

public dataProducto_CategoriasViewModel(ICommandManager commandManager, IMessageService messageService )
    {
        Catel.Argument.IsNotNull(() => commandManager);
        Catel.Argument.IsNotNull(() => messageService);
        _commandManager = commandManager;
        _messageService = messageService;            
        Salvar = CommandHelper.CreateCommand(OnSalvarExecute,()=>CategoriaProductoValidationSummary);
        _commandManager.RegisterCommand(Comandos.Catalogos.Salvar, Salvar, this);
    }

这是验证摘要的属性和ValidateFields的覆盖。

[ValidationToViewModel(Tag = "ValidacionCategoriaProducto")]
    public IValidationSummary CategoriaProductoValidationSummary { get; set; }

    protected override void ValidateFields(List<IFieldValidationResult> validationResults)
    {
        if (string.IsNullOrEmpty(Nombre))
            validationResults.Add(FieldValidationResult.CreateErrorWithTag(NombrePropiedad, "Nombre es requerido","ValidacionCategoriaProducto"));
        if (string.IsNullOrEmpty(Descr))
            validationResults.Add(FieldValidationResult.CreateErrorWithTag(DescrPropiedad, "Descripcion es requerido", "ValidacionCategoriaProducto"));           
    }

ValidateFields永远不会触发。并且始终启用该按钮。我错过了服务注册或其他什么东西吗?

1 个答案:

答案 0 :(得分:0)

已经发现我的错误。使用Orchestra模板创建项目时,它会在App.xaml.cs的开头添加这些行

Catel.Windows.Controls.UserControl.DefaultCreateWarningAndErrorValidatorForViewModelValue = false;
Catel.Windows.Controls.UserControl.DefaultSkipSearchingForInfoBarMessageControlValue = true;
Catel.Data.ModelBase.SuspendValidationForAllModels = true;

他们禁用验证功能,因此删除它们应该绰绰有余。