AF SDK Reference

PIPointList.UnloadAllAttributes Method

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PIPointList.UnloadAllAttributes Method

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Last UpdatedNov 18, 2025
2 minute read

Unload all PIPoint attributes from the cache except for the specified names for each PIPoint in the list.

Namespace: OSIsoft.AF.PI
Assembly: OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public void UnloadAllAttributes(
	params string[] exceptNames
)

Public Sub UnloadAllAttributes ( 
	ParamArray exceptNames As String()
)

Dim instance As PIPointList
Dim exceptNames As String()

instance.UnloadAllAttributes(exceptNames)

public:
void UnloadAllAttributes(
	... array<String^>^ exceptNames
)

member UnloadAllAttributes : 
        exceptNames : string[] -> unit

Parameters

exceptNames: Type: SystemString
The list of attribute names not to unload. If , then all attributes will be unloaded.

Remarks

All PIPoint attributes are unloaded from the client's cache except for the specified list of PIPoint attributes not to unload. This method is used to free memory when PIPoint attributes are no longer needed, but the PIPoint is still being used.

AF SDK Reference