Compile time error when styling BaseView like LoadingDecorator

问题

For instance I have the next code for my BaseView:

using System.Windows;
using DevExpress.Xpf.Core;

namespace Infrastructure.BaseView
{
    public class BaseView : LoadingDecorator
    {
        public BaseView()
        {
            Style = FindResource("BaseViewStyle") as Style;
        }
    }
}

Style:

<Style TargetType="{x:Type baseView:BaseView}" x:Key="BaseViewStyle" >
    <Setter Property="OwnerLock" Value="InputOnly"/>
    <Style.Triggers>
        <DataTrigger Binding="{Binding State}" d:DataContext="{d:DesignInstance Type=baseViewModel:BaseViewModel}">
            <DataTrigger.Value>
                <enums:ViewState>Busy</enums:ViewState>
            </DataTrigger.Value>
            <Setter Property="IsSplashScreenShown" Value="True" />
        </DataTrigger>

        <DataTrigger Binding="{Binding State}" d:DataContext="{d:DesignInstance Type=baseViewModel:BaseViewModel}">
            <DataTrigger.Value>
                <enums:ViewState>Default</enums:ViewState>
            </DataTrigger.Value>
            <Setter Property="IsSplashScreenShown" Value="False" />
        </DataTrigger>
    </Style.Triggers>
</Style>

Then I create specific view like this(name space definition is not so simple because view has really complex UI):

<baseView:BaseView x:Class="General.Views.ProjectListView"
         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"
         xmlns:baseView="clr-namespace:Infrastructure.BaseView;assembly=Infrastructure"
         xmlns:viewModels="clr-namespace:General.ViewModels"
         xmlns:dxprg="http://schemas.devexpress.com/winfx/2008/xaml/propertygrid"
         xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
         xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
         xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars"
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="1000" 
         d:DataContext="{d:DesignInstance Type=viewModels:ProjectListViewModel, IsDesignTimeCreatable=True}"
         x:Name="View"
...
</baseView:BaseView>

In run time everything works perfect, but I have a compile time error:

Error 4 Cannot create an instance of "BaseView".

And Designer in my VS does not work. And in it's StackTrace I can watch next information

at System.Windows.Style.CheckTargetType(Object element)

at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)

at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

...

I realized that the problem in TargetType="{x:Type baseView:BaseView}" in my style, but without this code my style shows me errors and not works and I understand it.

How can I remove this compile time error? It is ok to use LoadingDecorator for BaseView? I think that if I have some views in display and some of its can be busy, some - not. So, I thought to do it will be good.

I use PRISM in my app and I thought to take out LoadingDecorator in Shell.xaml beyond every regions but in this case I don't understand how can I bind IsSplashScreenShown to specific ViewModel of specific View.

来源：https://stackoverflow.com/questions/32695109/compile-time-error-when-styling-baseview-like-loadingdecorator

标签

wpf

xaml

devexpress

prism