These status events apply to the latest subscription loop architecture introduced in version 6.20.0 and enabled by default in version 7.0.0.
The PubNub C# SDK provides status events to notify you about the state of the SDK through the PNStatusCategory enum and PNException types.
PNConnectedCategory The connection has been established and is ready to receive real-time updates. PNDisconnectedCategory The connection has been intentionally terminated. PNUnexpectedDisconnectCategory The connection was unexpectedly disconnected. PNConnectionErrorCategory Failed to establish the initial connection, with details about the error. PNSubscriptionChangedCategory The mix of subscribed channels and channel groups has changed. This event returns two lists: one with all subscribed channels and the second with all subscribed channel groups. Previous status categories Status Description Deprecated in version Removed in version PNReconnectedCategory SDK was able to reconnect to PubNub. Now handled internally without a specific status. For more information on reconnection, refer to Configuration. 6.20.0 Not removed PNAcknowledgmentCategory An API call was successful. This status has additional details based on the type of the successful operation. Now handled with operation-specific success callbacks. 6.20.0 Not removed PNTimeoutCategory Used when an API operation didn't receive a response from the server in time. Now represented by specific exceptions. 6.20.0 Not removed PNRequestMessageCountExceededCategory Received more messages than specified threshold. No direct equivalent; use operation-specific callbacks. 6.20.0 Not removed PNNetworkIssuesCategory Indicated network connectivity problems. Now represented as more specific status categories. 6.20.0 Not removed PNMalformedResponseCategory PubNub sent a malformed response. This may happen when you connect to a public WiFi that requires you to log in via your web browser first, there is a proxy somewhere returning an HTML access denied error, or if there was an intermittent server issue.
This status category is not actively emitted. Malformed responses now trigger a PNUnexpectedDisconnectCategory status with appropriate error details.
Intermediate states like connecting and reconnecting are now handled internally without emitting specific statuses. For more general information on statuses and reconnection policies, refer to SDK Connection Lifecycle.
Other statusesThe SDK provides additional statuses for various operations:
Status DescriptionPNAccessDeniedCategory Authorization failed, usually due to invalid keys or token. PNCancelledCategory The operation was cancelled before completion. PNDecryptionErrorCategory Message decryption failed, likely due to incorrect crypto key. PNTLSConnectionFailedCategory Secure connection failed due to TLS/SSL issues. PNTLSUntrustedCertificateCategory TLS certificate validation failed. PNBadRequestCategory The SDK is missing some required parameters, like message, channel, subscribe key, publish key. PNNetworkIssuesCategory The SDK is not able to reach PubNub servers because the machine or device doesn't have Internet connection or the SDK is behind a proxy. PNTimeoutCategory Processing has failed because of request timeout. PNNetworkIssuesCategory The SDK is not able to reach PubNub servers because the machine or device doesn't have Internet connection or the SDK is behind a proxy. PNUnknownCategory The captured error is a minor client-side error or an unknown type at the time of SDK development. PNBadRequestCategory The SDK is missing some required parameters, like subscribe key or publish key. PNTimeoutCategory Processing has failed because of request timeout. PNReconnectedCategory SDK was able to reconnect to PubNub. Error events
The C# SDK uses PNException to provide detailed error information. Most errors are returned in the exception property of the PNStatus object.
None No error occurred. NameResolutionFailure DNS resolution failed. Please check network connectivity. PublishOperationTimeout A publish operation timed out. ReceiveFailure Failed to receive data from the server. ConnectFailure Failed to connect to the server. Please verify network reachability. WebRequestCanceled Request was cancelled before completion. NoInternet No internet connection detected. UnsubscribedAfterMaxRetries Unsubscribed after maximum retry attempts were exhausted. MessageTooLarge Message exceeded size limits. Error Code Description InvalidKey The key provided is invalid. InvalidSubscribeKey The subscribe key is invalid or missing. NoUuidSpecified No UUID was specified. Resource errors Error Code Description InvalidChannel A required channel parameter is invalid or missing. NotSubscribed Operation attempted on a channel to which you're not subscribed. DuplicateChannel Attempted to subscribe to a channel you're already subscribed to. EmptyGroupSubscription Cannot subscribe to an empty channel group. InvalidTimestamp The timestamp provided is invalid.
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