摘要

在Prism中弹出一个对话框，默认是一个Windows默认样式的窗口，会与自己所开发的项目完全不搭配，例如下面这样子

如果为了迎合软件主体风格，可以做出类似这样效果

其实原理也很简单，Prism也考虑到了这一点，所以特意设计一个供用户自定义的接口

编写组件样式

1、新建一个Window视图

注意Window里的一些必要属性记得设置一下，比如SizeToContent ShowInTaskbar等等实现无边框还是使用常规WindowChrome做法

<WindowChrome.WindowChrome>
        <WindowChrome
            CaptionHeight="60"
            CornerRadius="0"
            GlassFrameThickness="0" />
    </WindowChrome.WindowChrome>

其中CaptionHeight表示可以拖拽的高度，这里一般建议与自己所设计的高度一致，关于WindowChrome相关用法和介绍就不过多赘述，具体可前往MSDN文档:WindowChrome 类

2、根据自己需求或设计图重写该窗体样式，XAML太多就不一一介绍了，直接上代码

<Window
    x:Class="WPF_PrismCustomDialogStyle_Demo.Components.DialogWindowView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:WPF_PrismCustomDialogStyle_Demo.Components"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="{Binding Title}"
    Width="800"
    Height="450"
    ResizeMode="NoResize"
    SizeToContent="WidthAndHeight"
    WindowStartupLocation="CenterScreen"
    WindowStyle="None"
    mc:Ignorable="d">
    <Window.Resources>
        <!--  画刷  -->
        <SolidColorBrush x:Key="DialogBackgroundColor" Color="#040D14" />
        <SolidColorBrush x:Key="DialogBorderBrushColor" Color="#6C83A4" />
        <SolidColorBrush x:Key="DialogTitleColor" Color="#90CFFF" />
        <ImageBrush x:Key="DialogTitleImageBrush" ImageSource="/WPF_PrismCustomDialogStyle_Demo;component/Assets/Images/dialog_heder_bg.png" />
        <LinearGradientBrush x:Key="TitleTextGradientColor" StartPoint="0,0" EndPoint="0,1">
            <GradientStop Offset="1" Color="#A5BCF3" />
            <GradientStop Offset="0" Color="White" />
        </LinearGradientBrush>

        <!--  字体  -->
        <FontFamily x:Key="TitleFontFamily">/WPF_PrismCustomDialogStyle_Demo;component/Assets/Fonts/#庞门正道标题体3.0</FontFamily>

        <!--  对话框标题样式  -->
        <Style x:Key="SystemTitleStyle" TargetType="{x:Type TextBlock}">
            <Setter Property="VerticalAlignment" Value="Center" />
            <Setter Property="HorizontalAlignment" Value="Center" />
            <Setter Property="TextAlignment" Value="Center" />
            <Setter Property="FontSize" Value="15" />
            <Setter Property="FontFamily" Value="{StaticResource TitleFontFamily}" />
            <Setter Property="FontSize" Value="30" />
            <Setter Property="Foreground" Value="{StaticResource TitleTextGradientColor}" />
        </Style>

        <!--  按钮样式  -->
        <Style x:Key="IconButtonBaseStyle" TargetType="Button">
            <Setter Property="Cursor" Value="Hand" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <TextBlock
                            x:Name="icon"
                            HorizontalAlignment="Center"
                            VerticalAlignment="Center"
                            FontSize="{TemplateBinding FontSize}"
                            Foreground="{TemplateBinding Foreground}"
                            Text="{TemplateBinding Content}" />
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="icon" Property="Foreground" Value="#90CFFF" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Window.Style>
        <Style TargetType="{x:Type Window}">
            <Setter Property="ShowInTaskbar" Value="False" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Window}">
                        <Border
                            Background="{StaticResource DialogBackgroundColor}"
                            BorderBrush="{StaticResource DialogBorderBrushColor}"
                            BorderThickness="2">
                            <Grid>
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="60" />
                                    <RowDefinition />
                                </Grid.RowDefinitions>

                                <Border Background="{StaticResource DialogTitleImageBrush}">
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition />
                                            <ColumnDefinition />
                                        </Grid.ColumnDefinitions>
                                        <TextBlock
                                            Margin="10,0,0,0"
                                            HorizontalAlignment="Left"
                                            Foreground="{StaticResource DialogTitleColor}"
                                            Style="{StaticResource SystemTitleStyle}"
                                            Text="{TemplateBinding Title}" />
                                        <StackPanel
                                            Grid.Column="2"
                                            HorizontalAlignment="Right"
                                            VerticalAlignment="Center"
                                            Orientation="Horizontal"
                                            WindowChrome.IsHitTestVisibleInChrome="True">
                                            <Button
                                                Margin="0,0,20,0"
                                                Command="ApplicationCommands.Close"
                                                Content="x"
                                                Cursor="Hand"
                                                FontSize="30"
                                                FontWeight="Medium"
                                                Foreground="White"
                                                Style="{StaticResource IconButtonBaseStyle}" />
                                        </StackPanel>
                                    </Grid>
                                </Border>


                                <ContentPresenter Grid.Row="1" Content="{TemplateBinding Content}" />
                            </Grid>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Style>
    <WindowChrome.WindowChrome>
        <WindowChrome
            CaptionHeight="60"
            CornerRadius="0"
            GlassFrameThickness="0" />
    </WindowChrome.WindowChrome>
</Window>

Tips:因为一般对话框分为标题栏和主体部分，所以我们可以使用Grid分为两行，第一行是标题，第二行是内容，使用ContentPresenter来承载要显示的用户控件

使用组件

1、将自定义的样式组件注入到IOC容器

protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.Register<IDialogWindow, DialogWindowView>(nameof(DialogWindowView));
        }

2、使用DialogService弹出对话框

private void CustomOpenDialog()
        {
            DialogParameters dialogParameters = new DialogParameters()
            {
                {"Title",$"傲慢与偏见 {DateTime.Now:yyyy-MM-dd}" }
            };
            dialogService.Show(nameof(TestDialogView), dialogParameters, result =>
            {

            }, nameof(DialogWindowView));
        }

这段与传统打开弹框是差不多，唯一不同的就是使用到了一个可传入WindowName的重载函数，Tips:我们自定义的这个组件（DialogWindowView）是一定需要注入到IOC容器的，不然拿不到这个实例就会抛出异常，另外还有一个点就是该组件还需继承自IDialogWindow

效果

源码

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