什么是大括号的XAML绑定路径宣言中的Relevence [英] What is the Relevence of Braces in an XAML Binding Path Declaration
问题描述
所有的，问题是很简单的。下面结合做的不的工作，也就是ascociated 触发不火
All, the question is a simple one. The following binding does not work, that is, the ascociated Trigger does not fire
<DataTrigger Binding="{Binding dataAccess:DataGridTextSearch.IsAnyTextMatch,
ElementName=dataGrid}" Value="false">
要解决这个问题，使绑定工作，我们把在大括号绑定参考，如下：
to fix this and make the binding work, we place the binding reference in braces, as follows
<DataTrigger Binding="{Binding (dataAccess:DataGridTextSearch.IsAnyTextMatch),
ElementName=dataGrid}" Value="false">
为什么加括号解决的参考/结合的问题，这是怎么回事？
Why does adding the braces resolve the reference/binding problem and what is going on?
感谢您的时间。
推荐答案
多个属性（间接属性目标）
<Binding Path="propertyName.propertyName2" .../>
propertyName的必须解决是一个属性的名称，它是当前的DataContext 。该路径属性 propertyName的和 propertyName2 可存在于一个关系，任何属性其中 propertyName2 是对是值类型存在的属性 propertyName的。
propertyName must resolve to be the name of a property that is the current DataContext. The path properties propertyName and propertyName2 can be any properties that exist in a relationship, where propertyName2 is a property that exists on the type that is the value of propertyName.
单属性，附加或否则的Type-合格
<object property="(ownerType.propertyName)" .../>
括号表明，该属性在的PropertyPath 应使用部分资质构造。它可以使用XML命名空间来找到一个适当的映射的类型。在 ownerType 搜索一个XAML处理器访问类型，通过在每个组件中的 XmlnsDefinitionAttribute 声明。大多数应用程序都映射到 http://schemas.microsoft默认XML命名空间。 COM / WinFX的/ 2006 / XAML / presentation 的命名空间，所以preFIX通常只对自定义类型或其它类型的命名空间之外必要的。 propertyName的必须解决在现有的ownerType一个属性的名称。此语法通常用于下列情形之一的：
The parentheses indicate that this property in a PropertyPath should be constructed using a partial qualification. It can use an XML namespace to find the type with an appropriate mapping. The ownerType searches types that a XAML processor has access to, through the XmlnsDefinitionAttribute declarations in each assembly. Most applications have the default XML namespace mapped to the http://schemas.microsoft.com/winfx/2006/xaml/presentation namespace, so a prefix is usually only necessary for custom types or types otherwise outside that namespace. propertyName must resolve to be the name of a property existing on the ownerType. This syntax is generally used for one of the following cases:
-
的路径在XAML即在样式或模板不具有特定目标类型指定。一个合格的用法通常是无效除此以外的情况下，由于非式，非模板的情况下，物业存在于一个实例，不是一个类型。
The path is specified in XAML that is in a style or template that does not have a specified Target Type. A qualified usage is generally not valid for cases other than this, because in non-style, non-template cases, the property exists on an instance, not a type.
该属性是附加属性。
您绑定到一个静态属性。
You are binding to a static property.
有关用作情节串连图板的目标，指定为propertyName的属性必须用的DependencyProperty 。
For use as storyboard target, the property specified as propertyName must be a DependencyProperty.
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