NAMESPACES AND CLASSES in VB.NET

Encode PDF 417 in VB.NET NAMESPACES AND CLASSES

CHAPTER 7 NAMESPACES AND CLASSES
Draw PDF 417 In Visual Basic .NET
Using Barcode maker for VS .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
Scan PDF 417 In Visual Basic .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Namespaces
Code 3 Of 9 Creation In VB.NET
Using Barcode creation for .NET framework Control to generate, create Code-39 image in .NET framework applications.
www.OnBarcode.com
Create Barcode In VB.NET
Using Barcode drawer for .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Simply put, namespaces are the common prefixes of the full names of classes. The full name of a class is a dotted name; the last simple name it contains is the class name, and the rest is the namespace of the class. It takes longer, perhaps, to explain what namespaces are not. Namespaces are not metadata items they do not have an associated metadata table, and they cannot be referenced by tokens. Namespaces also have no direct bearing on assemblies. The name of an assembly might or might not match in full or in part the namespace(s) used in the assembly. One assembly might use several namespaces, and the same namespace can be used in different assemblies (an assembly using a namespace means an assembly defining classes with names belonging to this namespace). So why does the metadata model even bother with namespaces and class names instead of simply using the full class names The answer is simple: economy of space. Let s suppose you define two classes with the full names Foo.Bar and Foo.Baz. Since the names are different, in the full-name model you would have to store two full names in the string heap: Foo.Bar\0Foo.Baz\0. But if you split the full names into namespaces and names, you need to store only Foo\0Bar\0Baz\0. This is quite a difference when you consider the number of possible classes. Namespaces in ILAsm are declared in the following way: .namespace MyNamespace { ... // Classes declared here // Have full name "MyNamespace.<simple_name>" } Namespaces can be nested, as shown here: .namespace MyNamespace { ... // Classes declared here // Have full name "MyNamespace.<simple_name>" .namespace X { ... // Classes declared here // Have full name "MyNamespace.X.<simple_name>" } } or they can be unnested. This is how the IL disassembler versions 1.0 and 1.1 used to represent namespaces in the disassembly text: .namespace MyNamespace { ...
Painting Barcode In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Create UPCA In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create UCC - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 7 NAMESPACES AND CLASSES
Print Matrix In VB.NET
Using Barcode drawer for .NET framework Control to generate, create Matrix Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
4-State Customer Barcode Generation In VB.NET
Using Barcode creation for .NET framework Control to generate, create USPS Intelligent Mail image in .NET framework applications.
www.OnBarcode.com
// Classes declared here // Have full name "MyNamespace.<simple_name>" } .namespace MyNamespace.X { ... // Classes declared here // Have full name "MyNamespace.X.<simple_name>" } In version 2.0, it is recommended that you use full class names instead of the specification of namespaces, and the IL disassembler version 2.0 follows this pattern. The .namespace directive is still recognized by the IL assembler for backward-compatibility reasons.
PDF-417 2d Barcode Creator In Java
Using Barcode generator for Java Control to generate, create PDF 417 image in Java applications.
www.OnBarcode.com
PDF 417 Generation In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
Full Class Names
Drawing EAN / UCC - 13 In None
Using Barcode creator for Microsoft Word Control to generate, create UPC - 13 image in Word applications.
www.OnBarcode.com
Paint Code 3 Of 9 In None
Using Barcode generation for Software Control to generate, create Code-39 image in Software applications.
www.OnBarcode.com
As the preceding section explained, a full class name in general case is a dotted name, composed of the class s namespace and the name of the class. The loader resolves class references by their full names and resolution scopes, so the general rule is that no classes with identical full names must be defined in the same module. For multimodule assemblies, an additional (less strict) rule prohibits defining public classes classes visible outside the assembly with identical full names in the same assembly. In ILAsm, a class is always referenced by its full name, even if it is referenced from within the same namespace. This makes class referencing context independent. ILAsm v1.0 and v1.1 did not allow dotted names as class names, but you could bypass this restriction by quoting the dotted name, thus turning it into a simple name and avoiding a syntax error: .namespace X { .class public 'Y.Z' { ... } } And a class is always referenced by its full name, so a class with a dotted name will not pose any resolution problems (it will be referenced as X.Y.Z anyway), and the module will compile and work. But if you disassemble the module, you ll find that the left part of the dotted name of the class has migrated to the namespace, courtesy of the metadata emission API: .namespace X.Y { .class public Z { ... } }
GS1 - 12 Reader In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Draw Code 39 Extended In VS .NET
Using Barcode generation for Reporting Service Control to generate, create Code 39 Full ASCII image in Reporting Service applications.
www.OnBarcode.com
UPC Code Creation In Java
Using Barcode printer for Eclipse BIRT Control to generate, create UPC-A image in Eclipse BIRT applications.
www.OnBarcode.com
EAN-13 Supplement 5 Maker In None
Using Barcode encoder for Software Control to generate, create EAN-13 Supplement 5 image in Software applications.
www.OnBarcode.com
Generating UPC Symbol In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create UPC Code image in ASP.NET applications.
www.OnBarcode.com
Draw Barcode In None
Using Barcode generation for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
PDF 417 Maker In Visual C#
Using Barcode encoder for .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Data Matrix 2d Barcode Drawer In Java
Using Barcode maker for BIRT Control to generate, create Data Matrix 2d barcode image in Eclipse BIRT applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.