Attributes & .NET components

Attributes & .NET components Session 1

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Objectives

[object Object],[object Object],[object Object],[object Object],Introduction

[object Object],[object Object],[object Object],[object Object],[object Object],Attributes (1)

Attributes(2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Attribute Obsolete method

[object Object],[object Object],[object Object],Obsolete Attribute

Attributes - Syntax [AttributeName(Parameters)] [AnotherAttributeName(Parameters)] MethodName(Parameters) [ //method implementation ]

Customizing an Attribute(1) ,[object Object],[object Object],[object Object],[object Object]

Customizing an Attribute(2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Built-in Attributes Conditional Used to conditionally prevent or allow execution of a block of code Dll Import Used for interoperability with legacy and unmanaged code

Conditional attribute(1) ,[object Object],[object Object],[object Object]

Conditional attribute(2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Conditional Attribute (3) ,[object Object]

[object Object],Conditional Attribute (4)

[object Object],Debug / Release Mode ,[object Object],[object Object],[object Object]

A named ‘Symbol’ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Symbol

Conditional Attribute with Symbol Definition(1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],int qty = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("Enter Unit Price of the item : "); double price = Convert.ToDouble(Console.ReadLine()); double amt=qty * price; Console.WriteLine("Amount Payable in USD: {0}", amt); Convt(amt); Console.ReadLine(); } } }

Conditional Attribute with Symbol Definition (2)

[object Object],[object Object],[object Object],DllImport Attribute (1) Dll - Dynamic Link Library

[object Object],[object Object],[object Object],DllImport Attribute (2)

DllImport Attribute(3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Microsoft Platform SDK

[object Object],[object Object],Base Class Library

Using Win32 API(1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Creating Custom Attributes (1) [Author( " Scooby " )] public void CalculateDistance() { //Method Implementation }

Creating Custom Attributes (2) ,[object Object],[object Object]

Creating Custom Attributes (3) [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)] public class AuthorAttribute : Attribute { private string aName; public AuthorAttribute(string aName) { this.name = aName; ...

Example Rewritten ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Example with Constructor

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Example – Author Attribute public string Info() { return aname; } } [Author("IceCube")] public class AttrEx6 { public static int Convt(int val) { return(val*50); } } }

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],.NET Components

[object Object],[object Object],[object Object],Assembly - Features

Reading Metadata from Assemblies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Attribute[] attrs = Attribute.GetCustomAttributes(t); AuthorAttribute auth = (AuthorAttribute)attrs[0]; Console.WriteLine(auth.Info()); Console.WriteLine(); } } }

Summary(1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary(2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Attributes & .NET components

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Attributes & .NET components