[Definition: A bindingconnects an instance data node to a form control or to a model item constraint by using a binding expression as a locater.
[Definition: A bindingconnects an instance data node to a form control or to a model item constraint by using a binding expression as a locater.
[定义：通过将绑定表达式用作定位器，“绑定”将实例数据结点连接到表单控制或模型项目约束。