An Introduction to the .NET FCL, Part 5
Pages: 1, 2, 3, 4
Array Class
Just as Visual Basic scalar data types are in fact CTS scalar data types, so Visual Basic arrays are actually members of the .NET System.Array class. Some of its members that are not readily available in Visual Basic .NET are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
BinarySearch |
Shared method |
Searches a one-dimensional array for a particular value |
|
Clear |
Shared method |
Sets a range of array elements to zero, False, or a null reference, depending on the members' data type |
|
Copy |
Shared method |
Copies a portion of one array to another and performs any necessary type conversions |
|
CopyTo |
Method |
Copies all the elements of a one-dimensional array to another one-dimensional array starting at a particular index position |
|
IndexOf |
Shared method |
Returns the index of the first occurrence of a particular value in an array |
|
IsFixedSize |
Property |
Returns a Boolean indicating whether an Array object has a fixed size |
|
IsReadOnly |
Property |
Returns a Boolean indicating whether the elements in Array object are read-only |
|
LastIndexOf |
Shared method |
Returns the index of the last occurrence of a particular value in an array |
|
Rank |
Property |
Returns an Integer indicating the number of dimensions of the array |
|
Reverse |
Shared method |
Reverses the elements in all or part of a one-dimensional array |
|
Sort |
Shared method |
Sorts a one-dimensional array |
Boolean Structure
The following table lists the members of the System.Boolean structure that are not readily available in the Visual Basic .NET language:
|
Name |
Member type |
Description |
|---|---|---|
|
FalseString |
Shared field |
Returns the string representation of the Boolean value |
|
Parse |
Shared method |
Converts a string (whose value must be either Boolean.TrueString or Boolean.FalseString) to its Boolean equivalent. |
|
TrueString |
Shared field |
Returns the string representation of the Boolean value |
Byte Structure
The Visual Basic .NET Byte data type is synonymous with the .NET System.Byte data type. The following table lists some of the members of the Byte class that are not readily available in Visual Basic:
|
Name |
Member type |
Description |
|---|---|---|
|
MaxValue |
Shared field |
A constant representing the largest possible value of an instance of the Byte class |
|
MinValue |
Shared field |
A constant representing the smallest possible value of an instance of the Byte class |
|
Parse |
Shared method |
Converts the numeric representation of a string to its Byte equivalent |
Char Structure
Char, a new data type in VB.NET, corresponds to the System.Char data type. Some of the members of the latter that offer functionality not available in VB.NET are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
GetUnicodeCategory |
Shared method |
Returns a member of the |
|
IsControl |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a control character. |
|
IsDigit |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a decimal digit. (The decimal and thousands separators are not considered digits.) |
|
IsLetter |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a letter of the alphabet. |
|
IsLetterOrDigit |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a digit or a letter of the alphabet. |
|
IsLower |
Shared method |
Returns a Boolean indicating whether a particular
Unicode character is a lowercase letter. The method returns |
|
IsNumber |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a decimal or hexadecimal digit. |
|
IsPunctuation |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a punctuation mark. |
|
IsSeparator |
Shared method |
Returns a Boolean indicating whether a particular
Unicode character is a separator character (e.g., a space). The method does
not return |
|
IsSymbol |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is a symbol. |
|
IsUpper |
Shared method |
Returns a Boolean indicating whether a particular
Unicode character is an uppercase letter. The method returns |
|
IsWhiteSpace |
Shared method |
Returns a Boolean indicating whether a particular Unicode character is white space. |
|
MaxValue |
Shared field |
A constant containing the largest possible value of Char object. |
|
MinValue |
Shared field |
A constant containing the smallest possible value of a Char object. |
|
Parse |
Shared method |
Converts a particular character in a string to a Char object. |
