StringBuilder C# Reference Documentation

StringBuilder

Current Version: 10.0.0

A simple class for building strings. (Represents a mutable string of characters.)

Note: This class was introduced in Chilkat v9.5.0.58.

Object Creation

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

Properties

IntValue
public int IntValue {get; set; }
Introduced in version 9.5.0.58

Returns the content of the string converted to an integer.

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IsBase64
public bool IsBase64 {get; }
Introduced in version 9.5.0.76

Returns true if the content contains only those characters allowed in the base64 encoding. A base64 string is composed of characters 'A'..'Z', 'a'..'z', '0'..'9', '+', '/' and it is often padded at the end with up to two '=', to make the length a multiple of 4. Whitespace is ignored.

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LastMethodSuccess
public bool LastMethodSuccess {get; set; }

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
public int Length {get; }
Introduced in version 9.5.0.58

The number of characters of the string contained within this instance.

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Methods

Append
public bool Append(string value);
Introduced in version 9.5.0.58

Appends a copy of the specified string to this instance.

Returns true for success, false for failure.

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AppendBd
public bool AppendBd(BinData binData, string charset, int offset, int numBytes);
Introduced in version 9.5.0.64

Appends the contents of binData. The charset specifies the character encoding of the bytes contained in binData. The charset can be any of the supported encodings listed at Chilkat Supported Character Encodings. To append the entire contents of binData, set offset and numBytes equal to zero. To append a range of binData, set the offset and numBytes to specify the range.

Returns true for success, false for failure.

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AppendEncoded
public bool AppendEncoded(byte[] binaryData, string encoding);
Introduced in version 9.5.0.58

Appends binary data using the encoding specified by encoding, such as "base64", "hex", etc.

Returns true for success, false for failure.

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AppendInt
public bool AppendInt(int value);
Introduced in version 9.5.0.58

Appends the string representation of a specified 32-bit signed integer to this instance.

Returns true for success, false for failure.

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AppendInt64
public bool AppendInt64(long value);
Introduced in version 9.5.0.58

Appends the string representation of a specified 64-bit signed integer to this instance.

Returns true for success, false for failure.

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AppendLine
public bool AppendLine(string value, bool crlf);
Introduced in version 9.5.0.65

Appends the value followed by a CRLF or LF to the end of the curent StringBuilder object. If crlf is true, then a CRLF line ending is used. Otherwise a LF line ending is used.

Returns true for success, false for failure.

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AppendRandom
public bool AppendRandom(int numBytes, string encoding);
Introduced in version 9.5.0.96

Append numBytes random bytes encoded according to encoding. encoding can be "hex", "hex_lower", "base64", "base64url", or any other encoding supported by Chilkat.

Returns true for success, false for failure.

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AppendSb
public bool AppendSb(StringBuilder sb);
Introduced in version 9.5.0.62

Appends the contents of another StringBuilder to this instance.

Returns true for success, false for failure.

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AppendUuid
public bool AppendUuid(bool lowerCase);
Introduced in version 9.5.0.93

Generates and appends a random GUID/UUID such as 63c35f38-2b5f-4600-b3da-3ddee86d62b3. If lowerCase is true, then the hex values use lowercase ("a" - "f"). If lowerCase is false then uppercase is used ("A" - "F").

Returns true for success, false for failure.

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Clear
public void Clear();
Introduced in version 9.5.0.58

Removes all characters from the current StringBuilder instance.

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Contains
public bool Contains(string str, bool caseSensitive);
Introduced in version 9.5.0.58

Returns true if the str is contained within this object. For case sensitive matching, set caseSensitive equal to true. For case-insensitive, set caseSensitive equal to false.

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ContainsWord
public bool ContainsWord(string word, bool caseSensitive);
Introduced in version 9.5.0.69

Returns true if the word is contained within this object, but only if it is a whole word. This method is limited to finding whole words in strings that only contains characters in the Latin1 charset (i.e. iso-8859-1 or Windows-1252). A whole word can only contain alphanumeric chars where the alpha chars are restricted to those of the Latin1 alpha chars. (The underscore character is also considered part of a word.)

For case sensitive matching, set caseSensitive equal to true. For case-insensitive, set caseSensitive equal to false.

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ContentsEqual
public bool ContentsEqual(string str, bool caseSensitive);
Introduced in version 9.5.0.62

Returns true if the contents of this object equals the str. Returns false if unequal. For case insensitive equality, set caseSensitive equal to false.

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ContentsEqualSb
public bool ContentsEqualSb(StringBuilder sb, bool caseSensitive);
Introduced in version 9.5.0.62

Returns true if the contents of this object equals the sb. Returns false if unequal. For case insensitive equality, set caseSensitive equal to false.

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Decode
public bool Decode(string encoding, string charset);
Introduced in version 9.5.0.62

Decodes and replaces the contents with the decoded string. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Note: This method can only be called if the encoded content decodes to a string. The charset indicates the charset to be used in intepreting the decoded bytes. For example, the charset can be "utf-8", "utf-16", "iso-8859-1", "shift_JIS", etc.

Returns true for success, false for failure.

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DecodeAndAppend
public bool DecodeAndAppend(string value, string encoding, string charset);
Introduced in version 9.5.0.87

Decodes a binary encoded string, where the binary encoding (such as "url", "hex", "base64", etc.) is specified by encoding, and the underlying charset encoding (such as "utf-8", "windows-1252", etc.) is specified by charset. The decoded string is appended to this object.

Returns true for success, false for failure.

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Encode
public bool Encode(string encoding, string charset);
Introduced in version 9.5.0.62

Encodes to base64, hex, quoted-printable, URL encoding, etc. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Returns true for success, false for failure.

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EndsWith
public bool EndsWith(string substr, bool caseSensitive);
Introduced in version 9.5.0.62

Returns true if the string ends with substr. Otherwise returns false. The comparison is case sensitive if caseSensitive is true, and case insensitive if caseSensitive is false.

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EntityDecode
public bool EntityDecode();
Introduced in version 9.5.0.62

Decodes HTML entities. See HTML entities for more information about HTML entities.

Returns true for success, false for failure.

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GetAfterBetween
public string GetAfterBetween(string searchAfter, string beginMark, string endMark);
Introduced in version 9.5.0.62

Begin searching after the 1st occurrence of searchAfter is found, and then return the substring found between the next occurrence of beginMark and the next occurrence of endMark.

Returns null on failure

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GetAfterFinal
public string GetAfterFinal(string marker, bool removeFlag);
Introduced in version 9.5.0.77

Returns the substring found after the final occurrence of marker. If removeFlag is true, the marker and the content that follows is removed from this content.

If the marker is not present, then the entire string is returned. In this case, if removeFlag is true, this object is also cleared.

Returns null on failure

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GetAsString
public string GetAsString();
Introduced in version 9.5.0.58

Returns the contents as a string.

Returns null on failure

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GetBefore
public string GetBefore(string marker, bool removeFlag);
Introduced in version 9.5.0.77

Returns the substring found before the 1st occurrence of marker. If removeFlag is true, the content up to and including the marker is removed from this object's contents.

If the marker is not present, then the entire string is returned. In this case, if removeFlag is true, this object is also cleared.

Returns null on failure

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GetBetween
public string GetBetween(string beginMark, string endMark);
Introduced in version 9.5.0.62

Returns the substring found between the 1st occurrence of beginMark and the next occurrence of endMark.

Returns null on failure

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GetDecoded
public byte[] GetDecoded(string encoding);
Introduced in version 9.5.0.62

Decodes and returns the decoded bytes. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Returns an empty byte array on failure

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GetEncoded
public string GetEncoded(string encoding, string charset);
Introduced in version 9.5.0.62

Returns the string contents encoded in an encoding such as base64, hex, quoted-printable, or URL-encoding. The encoding can be set to any of the following strings: "base64", "hex", "quoted-printable" (or "qp"), "url", "base32", "Q", "B", "url_rc1738", "url_rfc2396", "url_rfc3986", "url_oauth", "uu", "modBase64", or "html" (for HTML entity encoding). The full up-to-date list of supported binary encodings is available at the link entitled "Supported Binary Encodings" below.

Note: The Encode method modifies the content of this object. The GetEncoded method leaves this object's content unmodified.

Returns null on failure

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GetHash
public string GetHash(string algorithm, string encoding, string charset);
Introduced in version 9.5.0.91

Returns the hash of the contents of this object. The algorithm is the hash algorithm, and can be "sha1", "sha256", "sha384", "sha512", "sha3-224", "sha3-256", "sha3-384", "sha3-512", "md2", "md5", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The encoding can be "base64", "modBase64", "base64Url", "base32", "base58", "qp" (for quoted-printable), "url" (for url-encoding), "hex", "hexLower", or any of the encodings found at Chilkat Binary Encodings List.

The charset is the character encoding byte representation to hash. It is typically "utf-8". It can be any of the chacter encodings listed at Chilkat Character Encodings List.

Returns null on failure

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GetNth
public string GetNth(int index, string delimiterChar, bool exceptDoubleQuoted, bool exceptEscaped);
Introduced in version 9.5.0.62

Returns the Nth substring in string that is a list delimted by delimiterChar. The first substring is at index 0. If exceptDoubleQuoted is true, then the delimiter char found between double quotes is not treated as a delimiter. If exceptEscaped is true, then an escaped (with a backslash) delimiter char is not treated as a delimiter.

Returns null on failure

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GetRange
public string GetRange(int startIndex, int numChars, bool removeFlag);
Introduced in version 9.5.0.87

Returns a string containing the specified range of characters from this instance. If removeFlag is true, then the range of chars is removed from this instance.

Note: It was discovered that the range of chars was always removed regardless of the value of removeFlag. This is fixed in v9.5.0.89.

Returns null on failure

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LastNLines
public string LastNLines(int numLines, bool bCrlf);
Introduced in version 9.5.0.62

Returns the last N lines of the text. If fewer than numLines lines exists, then all of the text is returned. If bCrlf is true, then the line endings of the returned string are converted to CRLF, otherwise the line endings are converted to LF-only.

Returns null on failure

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LoadFile
public bool LoadFile(string path, string charset);
Introduced in version 9.5.0.62

Loads the contents of a file.

Returns true for success, false for failure.

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Obfuscate
public void Obfuscate();
Introduced in version 9.5.0.80

Obfuscates the string. (The Unobfuscate method can be called to reverse the obfuscation to restore the original string.)

The Chilkat string obfuscation algorithm works by taking the utf-8 bytes of the string, base64 encoding it, and then scrambling the letters of the base64 encoded string. It is deterministic in that the same string will always obfuscate to the same result. It is NOT a secure way of encrypting a string. It is only meant to be a simple means of transforming a string into something unintelligible.

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Prepend
public bool Prepend(string value);
Introduced in version 9.5.0.61

Prepends a copy of the specified string to this instance.

Returns true for success, false for failure.

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PunyDecode
public bool PunyDecode();
Introduced in version 9.5.0.71

In-place decodes the string from punycode.

Returns true for success, false for failure.

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PunyEncode
public bool PunyEncode();
Introduced in version 9.5.0.71

In-place encodes the string to punycode.

Returns true for success, false for failure.

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RemoveAccents
public bool RemoveAccents();
Introduced in version 9.5.0.91

Removes the accents (diacritics) from European accented characters. This applies only to the accented characters found in the Windows-1252 (Latin alphabet) and Windows-1250 (Central European) charsets. Accent marks for characters in other languages will not be removed.

Returns true for success, false for failure.

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RemoveAfterFinal
public bool RemoveAfterFinal(string marker);
Introduced in version 9.5.0.77

Removes the substring found after the final occurrence of the marker. Also removes the marker. Returns true if the marker was found and content was removed. Otherwise returns false.

Returns true for success, false for failure.

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RemoveBefore
public bool RemoveBefore(string marker);
Introduced in version 9.5.0.77

Removes the substring found before the 1st occurrence of the marker. Also removes the marker. Returns true if the marker was found and content was removed. Otherwise returns false.

Returns true for success, false for failure.

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RemoveCharsAt
public bool RemoveCharsAt(int startIndex, int numChars);
Introduced in version 9.5.0.87

Removes the specified range of characters from this instance.

Returns true for success, false for failure.

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Replace
public int Replace(string value, string replacement);
Introduced in version 9.5.0.58

Replaces all occurrences of a specified string in this instance with another specified string. Returns the number of replacements.

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ReplaceAfterFinal
public bool ReplaceAfterFinal(string marker, string replacement);
Introduced in version 9.5.0.73

Replaces the content found after the final occurrence of marker with replacement.

Returns true for success, false for failure.

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ReplaceAllBetween
public bool ReplaceAllBetween(string beginMark, string endMark, string replacement, bool replaceMarks);
Introduced in version 9.5.0.64

Replaces the first occurrence of ALL the content found between beginMark and endMark with replacement. The beginMark and endMark are included in what is replaced if replaceMarks is true.

Returns true for success, false for failure.

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ReplaceBetween
public int ReplaceBetween(string beginMark, string endMark, string value, string replacement);
Introduced in version 9.5.0.62

Replaces all occurrences of value with replacement, but only where value is found between beginMark and endMark. Returns the number of replacements made.

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ReplaceFirst
public bool ReplaceFirst(string value, string replacement);
Introduced in version 9.5.0.77

Replaces the first occurrence of a specified string in this instance with another string. Returns true if the value was found and replaced. Otherwise returns false.

Returns true for success, false for failure.

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ReplaceI
public int ReplaceI(string value, int replacement);
Introduced in version 9.5.0.67

Replaces all occurrences of value with the decimal integer replacement. Returns the number of replacements.

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ReplaceNoCase
public int ReplaceNoCase(string value, string replacement);
Introduced in version 9.5.0.82

Replaces all occurrences of value with replacement (case insensitive). Returns the number of replacements.

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ReplaceWord
public int ReplaceWord(string value, string replacement);
Introduced in version 9.5.0.62

Replaces all word occurrences of a specified string in this instance with another specified string. Returns the number of replacements made.

Important: This method is limited to replacing whole words in strings that only contains characters in the Latin1 charset (i.e. iso-8859-1 or Windows-1252). A whole word can only contain alphanumeric chars where the alpha chars are restricted to those of the Latin1 alpha chars. (The underscore character is also considered part of a word.)

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SecureClear
public void SecureClear();
Introduced in version 9.5.0.67

Removes all characters from the current StringBuilder instance, and write zero bytes to the allocated memory before deallocating.

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SetNth
public bool SetNth(int index, string value, string delimiterChar, bool exceptDoubleQuoted, bool exceptEscaped);
Introduced in version 9.5.0.62

Sets the Nth substring in string in a list delimted by delimiterChar. The first substring is at index 0. If exceptDoubleQuoted is true, then the delimiter char found between double quotes is not treated as a delimiter. If exceptEscaped is true, then an escaped (with a backslash) delimiter char is not treated as a delimiter.

Returns true for success, false for failure.

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SetString
public bool SetString(string value);
Introduced in version 9.5.0.61

Sets this instance to a copy of the specified string.

Returns true for success, false for failure.

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Shorten
public bool Shorten(int numChars);
Introduced in version 9.5.0.87

Shortens the string by removing the last numChars chars.

Returns true for success, false for failure.

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StartsWith
public bool StartsWith(string substr, bool caseSensitive);
Introduced in version 9.5.0.62

Returns true if the string starts with substr. Otherwise returns false. The comparison is case sensitive if caseSensitive is true, and case insensitive if caseSensitive is false.

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ToCRLF
public bool ToCRLF();
Introduced in version 9.5.0.62

Converts line endings to CRLF (Windows) format.

Returns true for success, false for failure.

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ToLF
public bool ToLF();
Introduced in version 9.5.0.62

Converts line endings to LF-only (UNIX) format.

Returns true for success, false for failure.

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ToLowercase
public bool ToLowercase();
Introduced in version 9.5.0.62

Converts the contents to lowercase.

Returns true for success, false for failure.

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ToUppercase
public bool ToUppercase();
Introduced in version 9.5.0.62

Converts the contents to uppercase.

Returns true for success, false for failure.

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Trim
public bool Trim();
Introduced in version 9.5.0.62

Trims whitespace from both ends of the string.

Returns true for success, false for failure.

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TrimInsideSpaces
public bool TrimInsideSpaces();
Introduced in version 9.5.0.62

Replaces all tabs, CR's, and LF's, with SPACE chars, and removes extra SPACE's so there are no occurances of more than one SPACE char in a row.

Returns true for success, false for failure.

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Unobfuscate
public void Unobfuscate();
Introduced in version 9.5.0.80

Unobfuscates the string.

The Chilkat string obfuscation algorithm works by taking the utf-8 bytes of the string, base64 encoding it, and then scrambling the letters of the base64 encoded string. It is deterministic in that the same string will always obfuscate to the same result. It is not a secure way of encrypting a string. It is only meant to be a simple means of transforming a string into something unintelligible.

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WriteFile
public bool WriteFile(string path, string charset, bool emitBom);
Introduced in version 9.5.0.62

Writes the contents to a file. If emitBom is true, then the BOM (also known as a preamble), is emitted for charsets that define a BOM (such as utf-8, utf-16, utf-32, etc.)

Returns true for success, false for failure.

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WriteFileIfModified
public bool WriteFileIfModified(string path, string charset, bool emitBom);
Introduced in version 9.5.0.73

Writes the contents to a file, but only if it is a new file or if the contents are different than the existing file. If emitBom is true, then the BOM (also known as a preamble), is emitted for charsets that define a BOM (such as utf-8, utf-16, utf-32, etc.)

Returns true for success, false for failure.

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