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Thursday, February 12, 2009

REFLECTION AND ATTRIBUTES (Part Three) - The System.Reflection Namespace

You can see that the Type.Getxxx methods return arrays of objects created from classes defined in the reflection namespace. For example, GetFields() returns a FieldInfo array representing a type’s fields, and GetMethods() returns a MethodInfo array. All of the reflection classes that identify and provide information about type members are derived from the System.Reflection.MemberInfo class. Figure 19-1 shows the class hierarchy.

System.Reflection.MemberInfo class.

 

Figure 19-1 - Inheritance hierarchy of MemberInfo classes

System.Reflection.MemberInfo
|-----System.Type
|-----System.Reflection.EventInfo
|-----System.Reflection.FieldInfo
|-----System.Reflection.PropertyInfo
|-----System.Reflection.MethodBase
       |-----System.Reflection.ConstructorInfo
       |-----System.Reflection.MethodInfo

It may seem a bit odd that System.Type derives from MemberInfo; after all, a type contains members. However, recall that a Form inherits from a Control although a Form contains controls. In both cases the hierarchy is one of inheritance, not containment. 

The two base classes in Figure 19-1, MemberInfo and MethodBase, define members that play a crucial role in reflection for all their derived types. Here are some of the members you will find most useful:

MemberInfo
• Name—Returns the name of the member.
• Module—Returns the module in which the member is declared.
• GetCustomAttributes—Method that returns the attributes
attached to a member.


MethodBase
• IsAbstract, IsGenericMethod, IsStatic, IsVirtual—Properties
that describe the method.
• GetGenericArguments—Returns the type arguments of a generic method.
• GetParameters—Returns the parameters of the method or constructor.
• Invoke—Invokes a method or constructor. (See “Reflection and Late Binding” on the succeeding posts)

Related topic:

REFLECTION AND ATTRIBUTES (Part One)
REFLECTION AND ATTRIBUTES (Part Two) - The System.Type Members

Wednesday, February 11, 2009

TortoiseSVN downloads... (The current version is 1.5.7.)

 

For detailed info on what's new, read the changelog and the release notes.

This page points to installers for 32 bit and 64 bit operating systems. Please make sure that you choose the right installer for your PC. Otherwise the setup will fail.

We got reports that upgrading sometimes does not work properly. If you have problems after updating TortoiseSVN, just uninstall it, reboot, and then install it again.

Note for x64 users: you can install both the 32 and 64-bit version side by side. This will enable the TortoiseSVN features also for 32-bit applications.

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