StringArray VB.NET WinRT Reference Documentation

StringArray

Current Version: 9.5.0.73

Class/object for managing and manipulating collections of strings. Contains an ordered collection of strings.

Object Creation

Dim obj As New Chilkat.StringArray()

Properties

Count
Count As Integer (ReadOnly)

The number of strings contained within the object's internal array (i.e. ordered collection).

Important: This is an object that contains a collection of strings. Although the class/object name includes the word "Array", it should not be confused with an array in the sense of the primitive array type used in a given programming language.

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Crlf
Crlf As Boolean

If True, strings are always automatically converted to use CRLF line endings. If False, strings are automatically converted to use bare LF line endings.

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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 (ReadOnly)

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 (ReadOnly)

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 (ReadOnly)

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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Length
Length As Integer (ReadOnly)

The number of strings contained within the internal collection. (Identical to the Count property.)

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Trim
Trim As Boolean

If True, whitespace, including carriage-returns and linefeeds, are automatically removed from the beginning and end of a string when added to the collection.

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Unique
Unique As Boolean

If True, then duplicates are not allowed. When an attempt is made to insert a string that already exists, the duplicate insertion is silently suppressed and no error is returned. The default value is False.

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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 (ReadOnly)

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

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Methods

Append
Function Append(ByVal str As String) As Boolean

Appends a string to the end of the internal ordered collection.

Returns True for success, False for failure.

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AppendSerialized
Function AppendSerialized(ByVal encodedStr As String) As Boolean

Appends multiple strings to the end of the internal ordered collection. The encodedStr is what is returned from the Serialize method (see below).

Returns True for success, False for failure.

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Clear
Sub Clear()

Remove all strings from the internal collection.

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Contains
Function Contains(ByVal str As String) As Boolean

Returns True if the string is present in the internal collection. The string comparisons are case sensitive.

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Find
Function Find(ByVal findStr As String, ByVal startIndex As Integer) As Integer

Finds the index of the first string equal to findStr. The search begins at startIndex. If the string is not found, -1 is returned. The first string in the array is at index 0.

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FindFirstMatch
Function FindFirstMatch(ByVal matchPattern As String, ByVal startIndex As Integer) As Integer

Finds the first string that matches the matchPattern. The search begins at startIndex. If the string is not found, -1 is returned. The first string in the array is at index 0.

The matchPattern may contain zero or more asterisk chars, each of which matches 0 or more of any character.

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GetString
Function GetString(ByVal index As Integer) As String

Returns the string at an indexed location within the internal collection. The first string is located at index 0.

Returns Nothing on failure

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GetStringLen
Function GetStringLen(ByVal index As Integer) As Integer

Returns Nth string's length, in characters. The first string is located at index 0.

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InsertAt
Sub InsertAt(ByVal index As Integer, ByVal str As String)

Inserts a string into the internal collection at a specified index. Using index 0 will insert at the beginning.

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LastString
Function LastString() As String

Returns the last string in the internal collection.

Returns Nothing on failure

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LoadFromFile
Function LoadFromFile(ByVal path As String) As Boolean

Loads strings from a file (one per line) into the internal collection. It is assumed the file contains ANSI strings. To load from a file containing non-ANSI strings (such as utf-8), call LoadFromFile2 instead.

Returns True for success, False for failure.

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LoadFromFile2
Function LoadFromFile2(ByVal path As String, ByVal charset As String) As Boolean

Loads strings from a file (one per line) into the internal collection. The charset specifies the character encoding (such as utf-8) of the strings contained in the file.

Returns True for success, False for failure.

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LoadFromText
Sub LoadFromText(ByVal str As String)

Loads strings from an in-memory string (one per line) into the internal collection.

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Pop
Function Pop() As String

Returns the last string and removes it from the internal collection.

Returns Nothing on failure

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Prepend
Sub Prepend(ByVal str As String)

Adds a string to the beginning of the internal collection.

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Remove
Sub Remove(ByVal str As String)

Removes all strings equal to the string argument from the internal collection.

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RemoveAt
Function RemoveAt(ByVal index As Integer) As Boolean

Removes the string at a particular index.

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ReplaceAt
Sub ReplaceAt(ByVal index As Integer, ByVal str As String)
Introduced in version 9.5.0.52

Replaces the string at a specified index.

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SaveNthToFile
Function SaveNthToFile(ByVal index As Integer, ByVal saveToPath As String) As Boolean

Saves the Nth string in the collection to a file.

Returns True for success, False for failure.

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SaveToFile
Function SaveToFile(ByVal path As String) As Boolean

Saves the collection of strings to a file, one string per line. Strings are saved using the ANSI charset. (Call SaveToFile2 to specify a charset, such as "utf-8")

Returns True for success, False for failure.

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SaveToFile2
Function SaveToFile2(ByVal saveToPath As String, ByVal charset As String) As Boolean

Saves the collection of strings to a file, one string per line. Strings are saved using the specified charset.

Returns True for success, False for failure.

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SaveToText
Function SaveToText() As String

Writes the collection of strings to a single string, one per line (separated by CRLF line endings).

Returns Nothing on failure

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Serialize
Function Serialize() As String

Returns an string which is an encoded representation of all the strings in the collection. The string collection can be re-created by calling the AppendSerialized method.

Returns Nothing on failure

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Sort
Sub Sort(ByVal ascending As Boolean)

Sorts the strings in the collection in ascending or descending order. To sort in ascending order, set ascending to True, otherwise set ascending equal to False.

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SplitAndAppend
Sub SplitAndAppend(ByVal str As String, ByVal boundary As String)

Splits a string at a character or substring boundary and adds each resulting string to the internal collection.

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Subtract
Sub Subtract(ByVal stringArrayObj As StringArray)

Subtracts the strings contained within stringArrayObj from the caller's internal collection.

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Union
Sub Union(ByVal stringArrayObj As StringArray)

Performs the union set-operator. The result is that the caller will have a string collection that is the union of itself and stringArrayObj.

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