Revit开发之载入族的创建小技巧

在Revit中创建载入族的实例，要用到NewFamilyInstance 这个方法，

但是这个 这个方法有很多的重载，有时候很难找到正确的那个重载.

如果是我们自己建的族，我们还可以有一些选择方向，如果是别人

的族，那就比较麻烦了。

起始RevitAPI里虽然没有明确的方法可以让你一下找到正确的重载，

但是在Family里提供了参考：

Family.FamilyPlacementType

这返回的是一个枚举，他包含了以下类容：

OneLevelBased	The family is placed referencing a single level.
OneLevelBasedHosted	The family is placed referencing a single level and host.
TwoLevelsBased	The family is placed referencing two levels (e.g. a column).
ViewBased	The family is view-specific (e.g. a detail annotation)
WorkPlaneBased	The family is placed on a work plane or face.
CurveBased	The family is based on a line and placed on a work plane.
CurveBasedDetail	The family is based on a line and place on a specific view (e.g. a detail component).
CurveDrivenStructural	The family is a structural curve driven member (beam, brace, or slanted column)
Adaptive	The family is an adaptive family.
Invalid	This signals an invalid value for the enum.

我们可以参考这些信息，快速找到正确的方法。

注意：自适应族不能用NewFamilyInstance 这个创建

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