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AF SDK Reference

PICollective.SwitchMember Method (NetworkCredential, PIAuthenticationMode, AFConnectionPreference)

PICollective.SwitchMember Method (NetworkCredential, PIAuthenticationMode, AFConnectionPreference)

  • Last UpdatedNov 18, 2025
  • 3 minute read
PICollective.SwitchMember Method (NetworkCredential, PIAuthenticationMode, AFConnectionPreference)
The SwitchMember method is used to change the currently connected member of the collective using the specified credentials.

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

Syntax

public void SwitchMember(
	NetworkCredential credential,
	PIAuthenticationMode authenticationMode,
	AFConnectionPreference preference = AFConnectionPreference.Any
)
Public Sub SwitchMember ( 
	credential As NetworkCredential,
	authenticationMode As PIAuthenticationMode,
	Optional preference As AFConnectionPreference = AFConnectionPreference.Any
)

Dim instance As PICollective
Dim credential As NetworkCredential
Dim authenticationMode As PIAuthenticationMode
Dim preference As AFConnectionPreference

instance.SwitchMember(credential, authenticationMode, 
	preference)
public:
void SwitchMember(
	NetworkCredential^ credential, 
	PIAuthenticationMode authenticationMode, 
	AFConnectionPreference preference = AFConnectionPreference::Any
)
member SwitchMember : 
        credential : NetworkCredential * 
        authenticationMode : PIAuthenticationMode * 
        ?preference : AFConnectionPreference 
(* Defaults:
        let _preference = defaultArg preference AFConnectionPreference.Any
*)
-> unit 

Parameters

credential
Type: System.NetNetworkCredential
The NetworkCredential to use when connecting to the server.
authenticationMode
Type: OSIsoft.AF.PIPIAuthenticationMode
Specifies the type of authentication to be used when making the connection. The specified credential must match the type of authentication.
preference (Optional)
Type: OSIsoft.AFAFConnectionPreference
The connection preference to use when determining which member of the PICollective is selected for the connection. The current connection failover behavior is not modified. Use Any to switch to the next collective member based upon the current connection's failover behavior.

Exceptions

ExceptionCondition
PIVersionNotSupportedException This exception will be generated when attempting to connect to a PIServer with using WindowsAuthentication and the server does not support this mode of authentication.

Remarks

This method will change the currently connected member of the collective based upon the specified preference and the current Priority settings of the collective members for the current connection. This method will not modify the current failover behavior of the PICollective established with the initial connection to the collective.

A direct connection can be made to a collective member using one of the PICollectiveMember.Connect Overload methods. If the current connection to a collective member is a direct connection, then this method will establish a normal failover connection before switching members.

Version Information

AFSDK

Supported in: 3.1.1, 3.1.0, 3.0.2, 3.0.1, 3.0.0, 2.10.11, 2.10.5, 2.10.0, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7, 2.6

See Also

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