Log Xojo Plugin Reference Documentation

Log

Current Version: 9.5.0.73

Handy logging class exposing much of the functionality used internally by Chilkat for LastErrorText, LastErrorXml, and LastErrorHtml.

Object Creation

Dim log As New Chilkat.Log

Properties

DebugLogFilePath
DebugLogFilePath As String

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

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LastErrorHtml
LastErrorHtml As String (read-only)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
LastErrorText As String (read-only)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
LastErrorXml As String (read-only)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
LastMethodSuccess As Boolean
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = True and failure = False.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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VerboseLogging
VerboseLogging As Boolean

If set to True, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is False. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
Version As String (read-only)

Version of the component/library, such as "9.5.0.63"

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Methods

Clear
Sub Clear(initialTag As String)
Introduced in version 9.5.0.44

Clears the log. The initialTag is the initial top-level context tag for the new log.

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EnterContext
Sub EnterContext(tag As String)
Introduced in version 9.5.0.44

Enters a new context labelled with the given tag. Must be paired with a matching call to LeaveContext.

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LeaveContext
Sub LeaveContext()
Introduced in version 9.5.0.44

Leaves the current context. A context that is entered and exited without any logging within the context is automatically removed from the log. (To say it another way: Empty contexts are automaticallly removed from the log upon leaving the context.)

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LogData
Sub LogData(tag As String, message As String)
Introduced in version 9.5.0.44

Adds a tagged message to the log (i.e. a name/value pair).

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LogDataBase64
Sub LogDataBase64(tag As String, data As MemoryBlock)
Introduced in version 9.5.0.44

Logs binary data in base64 format.

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LogDataHex
Sub LogDataHex(tag As String, data As MemoryBlock)
Introduced in version 9.5.0.44

Logs binary data in hex format.

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LogDataMax
Sub LogDataMax(tag As String, message As String, maxNumChars As Int32)
Introduced in version 9.5.0.44

Logs a string, but only up to the 1st maxNumChars characters of the string.

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LogDateTime
Sub LogDateTime(tag As String, gmt As Boolean)
Introduced in version 9.5.0.44

Logs the current date/time in RFC822 format. If gmt is True, then the GMT/UTC time is logged. Otherwise it is the local time.

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LogError
Sub LogError(message As String)
Introduced in version 9.5.0.44

Logs an error within the current context.

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LogInfo
Sub LogInfo(message As String)
Introduced in version 9.5.0.44

Logs an informational message within the current context.

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LogInt
Sub LogInt(tag As String, value As Int32)
Introduced in version 9.5.0.44

Logs an integer.

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LogInt64
Sub LogInt64(tag As String, value As Int64)
Introduced in version 9.5.0.44

Logs a 64-bit integer.

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LogTimestamp
Sub LogTimestamp(tag As String)
Introduced in version 9.5.0.44

Logs the current time in HH:MM:SS:mmm format.

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SaveLastError
Function SaveLastError(path As String) As Boolean

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns True for success, False for failure.

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