使用指定的格式字串评估资料系结运算式以显示结果。
Evaluates a data-binding expression using the specified format string to display the result.
提供在执行阶段时对物件剖析并评估资料系结运算式的支援。
Provides support for parsing and evaluating a data-binding expression against an object at run time.
如果物件包含具有运算式(例如资料系结)的相依性属性，则会复制运算式的目前值，而不是运算式本身。
If the object contains dependency properties with expressions (such as a data binding), the current value of the expression is copied but not the expression itself.
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