Get custom data integer value for the specified custom data. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2017 Subscription Update 
Syntax
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Parameters
- customId
- Type: SystemInt32
 The identifier of the custom data field to get.
Return Value
Returns the integer of the custom data. If the data is not a number it will return 0.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentException | The custom data does not exist on the part. |