Csv VB.NET WinRT Reference Documentation

Csv

Object Creation

Dim obj As New Chilkat.Csv()

Properties

AutoTrim As Boolean

If True, then the strings returned by GetCell and GetCellByName are auto-trimmed of whitespace from both ends.

Crlf As Boolean

If True, then CRLF line endings are used when saving the CSV to a file or to a string (i.e. for the methods SaveFile, SaveFile2, SaveToString). If False then bare LF line-endings are used.

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.

Delimiter As String

The character that separates fields in a record. It is a comma by default. If the Delimiter property is not explicitly set, the CSV component will detect the delimiter when loading a CSV. (Semicolons are typically used in locales where the comma is used as a decimal point.)

EnableQuotes As Boolean

Introduced in version 9.5.0.71

If True, then the double-quote characters cause the quoted content, including CR's, LF's, and delimiter chars to be treated as normal text when reading/writing CSVs. The default is True.

EscapeBackslash As Boolean

Introduced in version 9.5.0.44

If True, then the backslash character is treated as an escape character when reading/writing CSVs. The default is False.

HasColumnNames As Boolean

Set to True prior to loading a CSV if the 1st record contains column names. This allows the CSV parser to correctly load the column names and not treat them as data.

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.

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.

Concept of LastErrorText

LastErrorText Standard Information

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.

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.

NumColumns As Integer (ReadOnly)

The number of columns in the 1st row, which may be the row containing column names if HasColumnNames is True.

NumRows As Integer (ReadOnly)

The number of data rows. If the CSV has column names, the 1st row is not included in the count. Also, empty lines containing only whitespace characters that follow the last non-empty row are not included.

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.

Version As String (ReadOnly)

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

Methods

Function DeleteColumn(ByVal index As Integer) As Boolean

Deletes the Nth column. (The 1st column is at index 0.)

Returns True for success, False for failure.

Function DeleteColumnByName(ByVal columnName As String) As Boolean

Deletes a column specified by name.

Returns True for success, False for failure.

Function DeleteRow(ByVal index As Integer) As Boolean

Deletes the entire Nth row. (The 1st row is at index 0.)

Returns True for success, False for failure.

Function GetCell(ByVal row As Integer, ByVal col As Integer) As String

Returns the contents of the cell at row, col. Indexing begins at 0. (The topmost/leftmost cell is at 0,0)

Returns Nothing on failure

Function GetCellByName(ByVal rowIndex As Integer, ByVal columnName As String) As String

The same as GetCell, but the column is specified by name instead of by index.

Returns Nothing on failure

Function GetColumnName(ByVal index As Integer) As String

Returns the name of the Nth column.

Returns Nothing on failure

Function GetIndex(ByVal columnName As String) As Integer

Returns the column index for a given column.

Function GetNumCols(ByVal row As Integer) As Integer

Returns the number of columns for a specific row. If the row is larger than the number of rows in the CSV, a zero is returned.

Function LoadFile(ByVal path As String) As Boolean

Loads a CSV from a file. It is assumed that the CSV file contains ANSI characters.

Returns True for success, False for failure.

Function LoadFile2(ByVal filename As String, ByVal charset As String) As Boolean

Loads a CSV from a file. The charset specifies the character encoding of the CSV file. A list of supported character encodings may be found on this page: Supported Charsets.

Returns True for success, False for failure.

Read Japanese utf-8 CSV File

Function LoadFromString(ByVal csvData As String) As Boolean

Loads a CSV document from an in-memory string variable.

Returns True for success, False for failure.

Function RowMatches(ByVal rowIndex As Integer, ByVal matchPattern As String, ByVal caseSensitive As Boolean) As Boolean

Compares the contents of an entire row to a wildcarded match pattern where "*" can be used any number of times to match 0 or more of any character. Returns True if a match was found, otherwise returns False. If caseSensitive is True, then the pattern match is case sensitive, otherwise it is case insensitive.

Function SaveFile(ByVal path As String) As Boolean

Saves a CSV to a file. The output file is written using the ANSI character encoding.

Returns True for success, False for failure.

Function SaveFile2(ByVal filename As String, ByVal charset As String) As Boolean

Saves a CSV to a file. The charset specifies the character encoding to use for the CSV file. The text data is converted to this charset when saving. A list of supported character encodings may be found on this page: Supported Charsets.

Returns True for success, False for failure.

Function SaveToString() As String

Writes the entire CSV document to a string variable.

Returns Nothing on failure

Function SetCell(ByVal row As Integer, ByVal col As Integer, ByVal content As String) As Boolean

Sets the contents for a single cell in the CSV. The content may include any characters including CRLF's, double-quotes, and the delimiter character. The Save* methods automatically double-quote fields with special chars when saving. The Load* methods automatically parse double-quoted and/or escaped fields correctly when loading.

Returns True for success, False for failure.

Function SetCellByName(ByVal rowIndex As Integer, ByVal columnName As String, ByVal contentStr As String) As Boolean

The same as SetCell, except the column is specified by name instead of by index.

Returns True for success, False for failure.

Function SetColumnName(ByVal index As Integer, ByVal columnName As String) As Boolean

Sets the name of the Nth column. The first column is at index 0. This method would only return False if an invalid index is passed (such as a negative number).

Returns True for success, False for failure.

Function SortByColumn(ByVal columnName As String, ByVal ascending As Boolean, ByVal caseSensitive As Boolean) As Boolean

Sorts the rows in the CSV by the contents of a specific column. If ascending is True, the sort is in ascending order, otherwise descending order. If caseSensitive is True then the sorting is case sensitive.

Returns True for success, False for failure.