BinData VB.NET Reference Documentation

BinData

Container for binary data. Provides methods for getting, setting, appending, etc. in binary and string encoded formats.

Object Creation

Dim obj As New Chilkat.BinData()

Properties

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.

NumBytes As Integer (ReadOnly)

Introduced in version 9.5.0.51

The number of bytes contained within the object.

Methods

Function AppendBd(ByVal binData As BinData) As Boolean

Introduced in version 9.5.0.62

Appends the contents of another BinData to this object.

Returns True for success, False for failure.

Function AppendBinary(ByVal data As Byte()) As Boolean

Introduced in version 9.5.0.51

Appends binary data to the current contents, if any.

Returns True for success, False for failure.

Function AppendBom(ByVal charset As String) As Boolean

Introduced in version 9.5.0.62

Appends the appropriate BOM (byte order mark), also known as a "preamble", for the given charset. If the charset has no defined BOM, then nothing is appended. An application would typically call this to append the utf-8, utf-16, or utf-32 BOM.

Returns True for success, False for failure.

StringBuilder to Bytes (in BinData)

Function AppendEncoded(ByVal encData As String, ByVal encoding As String) As Boolean

Introduced in version 9.5.0.51

Appends encoded binary data to the current data. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns True for success, False for failure.

Demonstrate Binary Data Encoding Methods

Function AppendEncodedSb(ByVal sb As StringBuilder, ByVal encoding As String) As Boolean

Introduced in version 9.5.0.62

Decodes the contents of sb and appends the decoded bytes to this object. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns True for success, False for failure.

Function AppendSb(ByVal sb As StringBuilder, ByVal charset As String) As Boolean

Introduced in version 9.5.0.62

Appends the contents of a StringBuilder to this object.

Returns True for success, False for failure.

StringBuilder to Bytes (in BinData)

Function AppendString(ByVal str As String, ByVal charset As String) As Boolean

Introduced in version 9.5.0.62

Appends a string to this object. (This does not append the BOM. If a BOM is required, the AppendBom method can be called to append the appropriate BOM.)

Returns True for success, False for failure.

Appending Strings to BinData

Function Clear() As Boolean

Introduced in version 9.5.0.51

Clears the contents.

Returns True for success, False for failure.

Function ContentsEqual(ByVal binData As BinData) As Boolean

Introduced in version 9.5.0.62

Return True if the contents of this object equals the contents of binData.

Function GetBinary() As Byte()

Introduced in version 9.5.0.51

Retrieves the binary data contained within the object.

Returns an empty byte array on failure

Function GetBinaryChunk(ByVal offset As Integer, ByVal numBytes As Integer) As Byte()

Introduced in version 9.5.0.51

Retrieves a chunk of the binary data contained within the object.

Returns an empty byte array on failure

Function GetEncoded(ByVal encoding As String) As String

Introduced in version 9.5.0.51

Retrieves the binary data as an encoded string. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns Nothing on failure

Demonstrate Binary Data Encoding Methods

Determine File Type from Binary Content of File

Function GetEncodedChunk(ByVal offset As Integer, ByVal numBytes As Integer, ByVal encoding As String) As String

Introduced in version 9.5.0.51

Retrieves a chunk of the binary data and returns it in encoded form. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns Nothing on failure

Demonstrate Binary Data Encoding Methods

Function GetEncodedSb(ByVal encoding As String, ByVal sb As StringBuilder) As Boolean

Introduced in version 9.5.0.64

Writes the encoded data to a StringBuilder. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns True for success, False for failure.

Demonstrate Binary Data Encoding Methods

Function GetString(ByVal charset As String) As String

Introduced in version 9.5.0.67

Interprets the bytes according to charset and returns the string. The charset can be "utf-8", "utf-16", "ansi", "iso-8859-*", "windows-125*", or any of the supported character encodings listed in the link below.

Returns Nothing on failure

Chilkat Supported Character Encodings

Function LoadBinary(ByVal data As Byte()) As Boolean

Introduced in version 9.5.0.51

Loads binary data and replaces the current contents, if any.

Returns True for success, False for failure.

Function LoadEncoded(ByVal encData As String, ByVal encoding As String) As Boolean

Introduced in version 9.5.0.51

Loads binary data from an encoded string, replacing the current contents, if any. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns True for success, False for failure.

Function LoadFile(ByVal path As String) As Boolean

Introduced in version 9.5.0.51

Loads data from a file.

Returns True for success, False for failure.

Function RemoveChunk(ByVal offset As Integer, ByVal numBytes As Integer) As Boolean

Introduced in version 9.5.0.51

Removes a chunk of bytes from the binary data.

Demonstrate Binary Data Encoding Methods

Function SecureClear() As Boolean

Introduced in version 9.5.0.67

Securely clears the contents by writing 0 bytes to the memory prior to deallocating the internal memory.

Returns True for success, False for failure.

Function WriteFile(ByVal path As String) As Boolean

Introduced in version 9.5.0.62

Writes the contents to a file.

Returns True for success, False for failure.