Bz2 C# Reference Documentation

Bz2

Current Version: 10.1.0

Provides the ability to create and unzip .bz2 compressed files using the BZip2 compression algorithm.

Object Creation

Chilkat.Bz2 obj = new Chilkat.Bz2();

Properties

AbortCurrent
public bool AbortCurrent {get; set; }
Introduced in version 9.5.0.58

When set to true, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to false when the next method is called. When the abort occurs, this property is reset to false. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

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DebugLogFilePath
public string DebugLogFilePath {get; set; }

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

  • A timeout property set to 0, indicating an infinite timeout.
  • A hang occurring within an event callback in the application code.
  • An internal bug in the Chilkat code causing the hang.

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HeartbeatMs
public int HeartbeatMs {get; set; }

This is the number of milliseconds between each AbortCheck event callback. The AbortCheck callback allows an application to abort any compress or decompress operation prior to completion. If HeartbeatMs is 0, no AbortCheck event callbacks will occur.

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LastErrorHtml
public string LastErrorHtml {get; }

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorText
public string LastErrorText {get; }

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorXml
public string LastErrorXml {get; }

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastMethodSuccess
public bool LastMethodSuccess {get; set; }

Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.

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VerboseLogging
public bool VerboseLogging {get; set; }

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
public string Version {get; }

Version of the component/library, such as "10.1.0"

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Methods

CompressFile
public bool CompressFile(string inFilename, string toPath);

Compresses a file to create a BZip2 compressed file (.bz2).

Note: Both inFilename and toPath should be relative or absolute file paths (not just a path to a directory). For example "someDir1/someDir2/myFile.txt" or "c:/someDir1/myFile.bz2".

Returns true for success, false for failure.

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CompressFileAsync (C#) (PowerShell)
public Task CompressFileAsync(string inFilename, string toPath);

Creates an asynchronous task to call the CompressFile method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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CompressFileToMem
public byte[] CompressFileToMem(string inFilename);

BZip2 compresses a file to an in-memory image of a .bz2 file.

Returns an empty byte array on failure

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CompressFileToMemAsync (C#) (PowerShell)
public Task CompressFileToMemAsync(string inFilename);

Creates an asynchronous task to call the CompressFileToMem method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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CompressMemory
public byte[] CompressMemory(byte[] inData);

Compresses in-memory data to an in-memory image of a .bz2 file.

Returns an empty byte array on failure

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CompressMemoryAsync (C#) (PowerShell)
public Task CompressMemoryAsync(byte[] inData);

Creates an asynchronous task to call the CompressMemory method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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CompressMemToFile
public bool CompressMemToFile(byte[] inData, string toPath);

BZip2 compresses and creates a .bz2 file from in-memory data.

Returns true for success, false for failure.

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CompressMemToFileAsync (C#) (PowerShell)
public Task CompressMemToFileAsync(byte[] inData, string toPath);

Creates an asynchronous task to call the CompressMemToFile method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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LoadTaskCaller
public bool LoadTaskCaller(Task task);
Introduced in version 9.5.0.80

Loads the caller of the task's async method.

Returns true for success, false for failure.

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UncompressFile
public bool UncompressFile(string inFilename, string toPath);

Unzips a .bz2 file.

Returns true for success, false for failure.

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UncompressFileAsync (C#) (PowerShell)
public Task UncompressFileAsync(string inFilename, string toPath);

Creates an asynchronous task to call the UncompressFile method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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UncompressFileToMem
public byte[] UncompressFileToMem(string inFilename);

Unzips a .bz2 file directly to memory.

Returns an empty byte array on failure

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UncompressFileToMemAsync (C#) (PowerShell)
public Task UncompressFileToMemAsync(string inFilename);

Creates an asynchronous task to call the UncompressFileToMem method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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UncompressMemory
public byte[] UncompressMemory(byte[] inData);

Unzips from an in-memory image of a .bz2 file directly into memory.

Returns an empty byte array on failure

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UncompressMemoryAsync (C#) (PowerShell)
public Task UncompressMemoryAsync(byte[] inData);

Creates an asynchronous task to call the UncompressMemory method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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UncompressMemToFile
public bool UncompressMemToFile(byte[] inData, string toPath);

Unzips from an in-memory image of a .bz2 file to a file.

Returns true for success, false for failure.

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UncompressMemToFileAsync (C#) (PowerShell)
public Task UncompressMemToFileAsync(byte[] inData, string toPath);

Creates an asynchronous task to call the UncompressMemToFile method with the arguments provided.

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns null on failure

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Events

AbortCheck
public event AbortCheckEventHandler OnAbortCheck;

Provides the opportunity for a method call to be aborted. The AbortCheck event is fired periodically based on the value of the HeartbeatMs property. If HeartbeatMs is 0, then no AbortCheck events will fire. As an example, to fire 5 AbortCheck events per second, set the HeartbeatMs property equal to 200.

Chilkat .NET Framework Event Implementation

Args are passed using Chilkat.AbortCheckEventArgs

Event callback implementation:

private void bz_OnAbortCheck(object sender, Chilkat.AbortCheckEventArgs args)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
bz.OnAbortCheck += bz_OnAbortCheck;

Chilkat .NET Core Event Implementation

Event callback implementation:

public void handleAbortCheck(out bool abort)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
// ...
Chilkat.Bz2.AbortCheck abortCheck = new Chilkat.Bz2.AbortCheck(handleAbortCheck);
bz.setAbortCheckCb(abortCheck);
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PercentDone
public event PercentDoneEventHandler OnPercentDone;

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This event is only fired when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For operations (Chilkat method calls) that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

The PercentDone callback counts as an AbortCheck event. For method calls that complete quickly such that PercentDone events fire, it may be that AbortCheck events don't fire because the opportunity to abort is already provided in the PercentDone callback. For time consuming operations, where the amount of time between PercentDone callbacks are long, AbortCheck callbacks may be used to allow for the operation to be aborted in a more responsive manner.

The abort output argument provides a means for aborting the operation. Setting it to true will cause the method to abort and return a failed status (or whatever return value indicates failure).

Chilkat .NET Framework Event Implementation

Args are passed using Chilkat.PercentDoneEventArgs

Event callback implementation:

private void bz_OnPercentDone(object sender, Chilkat.PercentDoneEventArgs args)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
bz.OnPercentDone += bz_OnPercentDone;

Chilkat .NET Core Event Implementation

Event callback implementation:

public void handlePercentDone(int pctDone, out bool abort)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
// ...
Chilkat.Bz2.PercentDone percentDone = new Chilkat.Bz2.PercentDone(handlePercentDone);
bz.setPercentDoneCb(percentDone);
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ProgressInfo
public event ProgressInfoEventHandler OnProgressInfo;

A general name/value event that provides information about what is happening during a method call. To find out what information is available, write code to handle this event and log the name/value pairs. Most are self-explanatory.

Chilkat .NET Framework Event Implementation

Args are passed using Chilkat.ProgressInfoEventArgs

Event callback implementation:

private void bz_OnProgressInfo(object sender, Chilkat.ProgressInfoEventArgs args)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
bz.OnProgressInfo += bz_OnProgressInfo;

Chilkat .NET Core Event Implementation

Event callback implementation:

public void handleProgressInfo(string name, string value)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
// ...
Chilkat.Bz2.ProgressInfo progressInfo = new Chilkat.Bz2.ProgressInfo(handleProgressInfo);
bz.setProgressInfoCb(progressInfo);
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TaskCompleted
public event TaskCompletedEventHandler OnTaskCompleted;

Called in the background thread when an asynchronous task completes.

Chilkat .NET Framework Event Implementation

Args are passed using Chilkat.TaskCompletedEventArgs

Event callback implementation:

private void bz_OnTaskCompleted(object sender, Chilkat.TaskCompletedEventArgs args)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
bz.OnTaskCompleted += bz_OnTaskCompleted;

Chilkat .NET Core Event Implementation

Event callback implementation:

public void handleTaskIdCompleted(int taskId)
	{
	    // application code goes here.
	}

To add an event handler:

Chilkat.Bz2 bz = new Chilkat.Bz2();
// ...
Chilkat.Bz2.TaskIdCompleted taskIdCompleted = new Chilkat.Bz2.TaskIdCompleted(handleTaskIdCompleted);
bz.setTaskIdCompletedCb(taskIdCompleted);
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