Interface

Interface is nothing but an contract of the system which can be implemented on accounts.
.Net doesn't support the multiple inheritance directly but using interfaces we can achieve multiple inheritance in .net.
An Interface can only contains abstract members and it is a reference type.
Interface members can be Methods, Properties, Events and Indexers. But the interfaces only contains declaration for its members.
Class which inherits interface needs to implement all it's methods.
All declared interface member are implicitly public.


  class Program
    {
        interface BaseInterface
        {
            void BaseInterfaceMethod();
        }
        interface DerivedInterface : BaseInterface
        {
            void DerivedToImplement();
        }
        class InterfaceImplementer : DerivedInterface
        {
            public void DerivedToImplement()
            {
                Console.WriteLine("Method of Derived Interface called.");
            }
            public void BaseInterfaceMethod()
            {
                Console.WriteLine("Method of Base Interface called.");
            }
        }
        static void Main(string[] args)
        {
            InterfaceImplementer er = new InterfaceImplementer();
            er.DerivedToImplement();
            er.BaseInterfaceMethod();
            Console.Read();
        }
    }

Output:
Method of Derived Interface called.
Method of Base Interface called.

Comments

GRIDVIEW GROUPING

When displaying data, we sometimes would like to group data for better user experience or when displaying long list of hierarchal data, we would want to display them in a tree view kind of structure. There is more than way of doing this, but I am going to explain achieving this functionality using AJAX Collapsible Panel Extender Control . Overview: I am going to use Adventure Works as datasource. Every product in Production.Product table belongs to a product sub category. We fetch handful of products and the sub categories they belong to from the database. Our objective is to list all the available sub categories and allow user to expand/collapse to look/hide the list of products belonging to each subcategory. Database Connection Added following entry under connectionStrings element in web.config . < add name = "Sql" connectionString="Data Source=(local); Initial Catalog = AdventureWorks ...

Dynamic Generation of Word Document Report in ASP.NET with HTML

Overview Ever needed to generate Word documents from your ASP.NET applications? There are a couple of components which will help to generate Word documents, but using these components may have some overhead such as Component Registration, setting permissions, licenses, etc., Sometimes, it may even become difficult to understand their features and use them. Generating word document in ASP.NET with HTML is incredibly easy. The following sample demonstrates how to place Heading and Table dynamically in the word document in ASP.NET web applications using HTML. Requirements Microsoft Visual Web Developer 2005 Express Edition Create the Web Application project Add the new Web Site Application project (with name as Generate Word Document) and place the button (with name as btnGenerateDocument) in the Default.aspx web form as shown below. Double click the highlighted code behind file from the Solution Explorer and add the following namespaces. Listing 1 using System...

GRIDVIEW ZOOM IMAGE

When you have images in your GridView , you would most likely show them as thumbnails so as to not distort the whole layout. However user would want to look at the full image by clicking on the image or just hovering his mouse over it. In today’s applications, this is a basic requirement and there are just so many third party controls or plugins which would support this functionality. I am going do this conventional way using javascript way in this article. On top of it, I am also going to explain how to get images from database using HttpHandlers . Example: I am using Adventure Works as datasource. We fetch handful of products and bind them to the grid. When page is initially loaded, we retrieve products from Production . Product table and bind them to the grid. We display some product attributes such as Product ID, Product Number, Product Name, List Price and product’s thumbnail. When user hover his mouse on the page, we fetch the f...

ASP Dot NET EXAMPLES

Search This Blog

Interface

Comments

Post a Comment

Popular posts from this blog

GRIDVIEW GROUPING

Dynamic Generation of Word Document Report in ASP.NET with HTML

GRIDVIEW ZOOM IMAGE