An Introduction to the .NET FCL, Part 5
Pages: 1, 2, 3, 4
Int16 Structure
The VB.NET Short data type corresponds directly to the System.Int16 structure. The members of the latter structure that offer unique functionality are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
MaxValue |
Shared field |
A constant containing the largest possible value of an Int16 object |
|
MinValue |
Shared field |
A constant containing the smallest possible value of an Int16 object |
|
Parse |
Shared method |
Converts the string representation of a number to its Int16 equivalent |
Int32 Structure
The VB.NET Integer data type corresponds directly to the System.Int32 structure. The members of the Int32 structure that offer unique functionality are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
MaxValue |
Shared field |
A constant containing the largest possible value of an Int32 object |
|
MinValue |
Shared field |
A constant containing the smallest possible value of an Int32 object |
|
Parse |
Shared method |
Converts the string representation of a number to its Int32 equivalent |
Int64 Structure
The VB.NET Long data type corresponds directly to the System.Int64 structure. The members of the Int64 structure that offer unique functionality are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
MaxValue |
Shared field |
A constant containing the largest possible value of an Int64 object |
|
MinValue |
Shared field |
A constant containing the smallest possible value of an Int64 object |
|
Parse |
Shared method |
Converts the string representation of a number to its Int64 equivalent |
Object Class
The VB.NET Object data type corresponds to the System.Object class. System.Object, however, offers no functionality that is not available through the standard Visual Basic language.
Single Structure
The VB.NET Single data type corresponds to the .NET Framework's System.Single data type. The following table lists the members of the latter that offer functionality not found in the Visual Basic .NET language:
|
Name |
Member type |
Description |
|---|---|---|
|
Epsilon |
Shared field |
A constant containing the smallest positive Single value greater than zero |
|
MaxValue |
Shared field |
A constant containing the largest possible value of a Single object |
|
MinValue |
Shared field |
A constant containing the smallest possible value of a Single object |
|
NaN |
Shared field |
A constant containing the representation of a value that is not a number (NaN) |
|
NegativeInfinity |
Shared field |
A constant containing a number that represents negative infinity |
|
PositiveInfinity |
Shared field |
A constant containing a number that represents positive infinity |
|
IsInfinity |
Shared method |
Returns a Boolean indicating whether the value of a Single object represents positive or negative infinity |
|
InNaN |
Shared method |
Returns a Boolean indicating whether a Single object contains a value that is not a number (NaN) |
|
IsNegativeInfinity |
Shared method |
Returns a Boolean indicating whether the value of a Single object represents negative infinity |
|
IsPositiveInfinity |
Shared method |
Returns a Boolean indicating whether the value of a Single object represents positive infinity |
|
Parse |
Shared method |
Converts the string representation of a number to its Single equivalent |
String Class
The VB.NET String data type is equivalent to the System.String class. The members of the String class that offer functionality not incorporated in the VB.NET language are shown in the following table:
|
Name |
Member type |
Description |
|---|---|---|
|
Chars |
Property |
Returns a Char instance representing the character at a particular position in a string |
|
Clone |
Method |
Returns an additional reference to a particular String instance |
|
CompareOrdinal |
Shared method |
Compares two strings without considering locale settings |
|
CopyTo |
Method |
Copies a designated number of characters starting at a particular position in a string to a character array |
|
Empty |
Shared field |
A constant representing an empty string |
|
EndsWith |
Method |
Returns a Boolean indicating whether the String instance ends with the substring passed to the method as an argument |
|
Format |
Shared method |
Replaces each format specification in a string with its corresponding value |
|
IndexOf |
Method |
Returns the position of the first occurrence of a character or a substring within the string instance |
|
IndexOfAny |
Method |
Returns the index of the first occurrence in this String instance of any element in a character array |
|
Insert |
Method |
Inserts a substring at a designated position of a String instance |
|
LastIndexOf |
Method |
Returns the position of the last occurrence of a designated character or substring within the string instance |
|
LastIndexOfAny |
Method |
Returns the position of the last occurrence in this String instance of any of a set of characters in a character array |
|
PadLeft |
Method |
Right aligns the characters in a String instance by padding them with a space or another designated character |
|
PadRight |
Method |
Left aligns the characters in a String instance by padding them with a space or another designated character |
|
Remove |
Method |
Deletes a specified number of characters from a String instance beginning at a designated position |
|
StartsWith |
Method |
Returns a Boolean indicating whether the String instance begins with a designated substring or character |
|
ToCharArray |
Method |
Copies the characters in the String instance to a Unicode character array |
Non-CTS Data Types
Note, however, that because they are not part of the Common Language Specification (the specification that defines the core functionality that a .NET platform must implement), VB does not wrap the following CTS data types:
- System.SByte
-
Description: Signed byte
Value Range: -128 to 127
- System.UInt16
-
Description: Unsigned 16-bit integer
Value Range: 0 to 65,535
- System.UInt32
-
Description: Unsigned 32-bit integer
Value Range: 0 to 4,294,967,295
- System.UInt64
-
Description: Unsigned 64-bit integer
Value Range: 0 to 18,446,744,073,709,551,615
Budi Kurniawan is a senior J2EE architect and author.
Ted Neward is an independent software development architect and mentor in the Sacramento, California area.
|
Related Reading VB.NET Core Classes in a Nutshell |
Return to .NET DevCenter.
