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  • WPF整理-使用ResourceDictionary管理Logical Resources

    “Logical resources may be of various types, such as brushes, geometries, styles, and templates.
    Placing all those resources in a single file such as App.xaml hinders maintainability. A better
    approach would be to separate resources of different types (or based on some other criteria) to
    their own files. Still, they must be referenced somehow from within a common file such as App.
    xaml so they are recognized.”

    为了增加资源文件的可维护性,我们应该使用ResourceDictionary对资源进行:分类、汇总。

    如何实现呢?举个例子

    1.新建一个WPF Application,在Application中添加一个New Item,选择ResourceDictionary。

    譬如,命名为Brushes.xaml,我们用它来存放一些笔刷。打开,我们添加一个笔刷如下:

    Brushes.xaml:

    <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
        <LinearGradientBrush EndPoint="1,0" x:Key="brush1">
            <GradientStop Color="Violet" Offset="0" />
            <GradientStop Color="Orange" Offset=".7" />
            <GradientStop Color="Brown" Offset="1" />
        </LinearGradientBrush>
    </ResourceDictionary>

    2.在App.xaml中Merge则个Resource。
    “Open App.xaml. We need to merge external resource dictionaries into the main
    application dictionary.

    打开App.xaml,添加如下内容:

    <Application x:Class="ManagingLogicalResources.App"
                 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                 StartupUri="MainWindow.xaml">
        <Application.Resources>
            <ResourceDictionary>
                <ResourceDictionary.MergedDictionaries>
                    <ResourceDictionary Source="Brushes.xaml"/>
                </ResourceDictionary.MergedDictionaries>
            </ResourceDictionary>
        </Application.Resources>
    </Application>

    3.这样我们就可以在页面中正常使用了。

    <Window x:Class="ManagingLogicalResources.MainWindow"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            Title="MainWindow" Height="350" Width="525">
        <Grid>
            <Ellipse Fill="{StaticResource brush1}"/>
        </Grid>
    </Window>

    效果如下:

     -----------------------------------

    在实际开发中更常用的做法是:直接在使用的View内部Merge。

    <Window x:Class="WPFMergedDicitonary.MainWindow"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            Title="MainWindow" Height="350" Width="525">
        <Window.Resources>
            <ResourceDictionary>
                <ResourceDictionary.MergedDictionaries>
                    <ResourceDictionary Source="Brushes.xaml"/>
                </ResourceDictionary.MergedDictionaries>
            </ResourceDictionary>
        </Window.Resources>
        <Grid>
            <Ellipse Fill="{StaticResource brush1}"/>
        </Grid>
    </Window>

    效果同上,如下:

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  • 原文地址:https://www.cnblogs.com/DebugLZQ/p/3159285.html
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