August 2003
Intermediate to advanced
380 pages
9h 21m
English
Content preview from .NET Framework Essentials, 3rd Edition
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Appendix C. Common Data Types
Each of the .NET
languages can provide its own keywords for the types it supports. For
example, a keyword for an integer in VB is
Integer, whereas in C# or C++ it is
int; a boolean is Boolean in
VB, but bool in C# or C++. In any case, the
integer is mapped to the class Int32, and the boolean is mapped to
the class Boolean in the System namespace. Table C-1 lists all simple
data types common to the .NET Framework. Non-CLS-compliant types are
not guaranteed to interoperate with all CLS-compliant languages.
Table C-1. Common data types
|
Type |
Description |
|
Boolean |
True or false. |
|
Byte |
8-bit unsigned integer: 0 to 255. |
|
Char |
Character. Unicode 16-bit character. |
|
DateTime |
Represents a date and time value. |
|
Decimal |
Can represent positive and negative values with 28 significant digits: -79,228,162,514,264,337,593,543,950,335 to 79,228,162,514,264,337,593,543,950,335 . |
|
Double |
Stores 64-bit floating-point values: -1.79769313486231570e308 to 1.79769313486231570e308. |
|
Guid |
Represents a globally unique identifier (GUID); this is stored internally as a 128-bit integer. Commonly represented as a series of lowercase hexadecimal digits in groups of 8, 4, 4, 4, and 12 digits and separated by hyphens (e.g., 382c74c3-721d-4f34-80e5-57657b6cbc27). |
|
Int16 |
Stores 16-bit signed integers: -32,768 to 32,767. |
|
Int32 |
Stores 32-bit signed integers: -2,147,483,648 to 2,147,483,647. |
|
Int64 |
Stores 64-bit signed integers: -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. ... |
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