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如何在Silverlight中克隆路径资源?

pathgeometry cloning path silverlight

SergioL · 技术社区 · 16 年前

我在XAML文件中定义了一个资源,如下所示:

 <Path x:Key="myPath"
    Data="M14.773241,18.080208 C12.373256,18.080208 10.239936,19.30687 10.239936,27.573483
    L10.239936,36.106766 C10.239936,45.440037 12.586588,46.506699 14.986573,46.506699
    C18.613216,46.506699 19.359879,42.400059 19.359879,35.3601 L19.359879,27.733482
    C19.359879,20.05353 17.386559,18.080208 14.773241,18.080208 z M14.879907,11.786915
    C17.973221,11.786915 22.293194,13.013573 24.906511,17.920212 C26.773167,21.386856
    27.519829,27.093487 27.519829,32.213455 C27.519829,34.506775 27.306496,41.706726
    24.906511,46.453365 C23.626518,49.013351 20.906536,52.799992 15.199905,52.799992
    C2.1333201,52.799992 2.1333201,37.600086 2.1333201,32.160122 C2.1333201,28.05348
    2.1333201,22.666847 4.4266391,18.453541 C5.8666301,15.840225 8.639946,11.786915
    14.879907,11.786915 z"
 />

我希望能够将此路径的多个“实例”(以及其他几个)添加到StackPanel。当然,我不能简单地向面板添加“mypath”,因为它已经是另一个容器的子容器。

然而,我似乎也无法克隆路径。我试过了:

Path clone = new Path() 
{
  Data = source.Data
};

但没有运气…关于值超出预期范围的例外。

最后,我尝试挖掘source.data(路径几何体),但它不包含路径图……我不知道为什么,因为如果我将路径从资源部分直接复制到面板,路径就会呈现出来。

给出了什么?

谢谢, 塞尔焦

1 回复 | 直到 16 年前

Ben M 16 年前

将路径数据放入字符串资源:

<Page.Resources>
    <system:String x:Key="PathData">
    M14.773241,18.080208 C12.373256,18.080208 10.239936,19.30687  10.239936,27.573483
    L10.239936,36.106766 C10.239936,45.440037 12.586588,46.506699 14.986573,46.506699
    C18.613216,46.506699 19.359879,42.400059 19.359879,35.3601 L19.359879,27.733482
    C19.359879,20.05353 17.386559,18.080208 14.773241,18.080208 z M14.879907,11.786915
    C17.973221,11.786915 22.293194,13.013573 24.906511,17.920212 C26.773167,21.386856
    27.519829,27.093487 27.519829,32.213455 C27.519829,34.506775 27.306496,41.706726
    24.906511,46.453365 C23.626518,49.013351 20.906536,52.799992 15.199905,52.799992
    C2.1333201,52.799992 2.1333201,37.600086 2.1333201,32.160122 C2.1333201,28.05348
    2.1333201,22.666847 4.4266391,18.453541 C5.8666301,15.840225 8.639946,11.786915
    14.879907,11.786915 z
    </system:String>
</Page.Resources>

并使用它:

<Path x:Name="Path1" Data="{StaticResource PathData}" Fill="Blue" ... />
<Path x:Name="Path2" Data="{StaticResource PathData}" Fill="Red" ... />

您的XAML声明中将需要此项:

xmlns:system="clr-namespace:System;assembly=mscorlib"

如果要使用公共路径字符串以编程方式创建路径,Silverlight将缺少WPF具有的一些关键功能,因此必须对其进行组合:

string pathXaml = 
@"<Path xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
        xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""
        Data=""path_data_goes_here"" />";
Path path = (Path)System.Windows.Markup.XamlReader.Load(pathXaml);