Set the string value of a family parameter of the current family type. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
| C# | 
|---|
   |  
| Visual Basic | 
|---|
   |  
| Visual C++ | 
|---|
   |  
Parameters
- familyParameter
 -  Type:  Autodesk.Revit.DB FamilyParameter  
The family parameter of current type. 
- value
 -  Type:  System String  
The new value string for family parameter. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | Thrown when the input argument-"familyParameter" or "value"-is a null reference ( Nothing in Visual Basic) . | 
| Autodesk.Revit.Exceptions ArgumentException | Thrown when the input argument-"familyParameter"-is an invalid family parameter. or the input argument-"value"-is an illegal string. | 
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | Thrown when the input argument-"familyParameter"-is out of range. | 
| Autodesk.Revit.Exceptions InvalidOperationException | Thrown when the family parameter is determined by formula, or it is not a value type, or the current family type is invalid. |