SOLID Principles are coding standards that all developers should have a clear concept for developing software in a proper way to avoid a bad design. S - Single Responsibility Principle (SRP): A class should have one, and only one, a reason to change In Single Responsibility Principle Each class and module should focus on a single task at a time Everything in the class should be related to that single purpose There can be many members in the class as long as they related to the single responsibility With SRP, classes become smaller and cleaner Code is less fragile Here UserAccount class created which have below operations like, Login, Register, LogError and Send Mail. According to SRP, ideally, LogError and SendEmail are should not be part of UserAccount operations. public class UserAccount { public bool Login( string username, ...
Overview of the ASP.NET MVC - Introduction to ASP.NET MVC - ASP.NET MVC Version History - Life Cycle of MVC request - Role of Model, View, and Controller - Works Behaviour of ASP.NET MVC - Benefits MVC Architecture - Razor View Engine - Essential Language Features & Helpers - Basic Helpers - Strongly-Typed Helpers - Creating Custom Helpers - Declarative Helpers The MVC Pattern - The MVC Design Pattern - Working with Controllers - Model Templates - MVC State Management - Working with URLs and Routing (URL Routing) - Bundling and Minification Working with Controllers - Controller Actions - Controller and ActionResult Types - Passing Data from View to Controller - Action Filters & Custom Action Filter - Action Selectors HttpGet and HttpPost Razor Views - Razor View Engines and Syntax - Working with Layout Pages - Views & Partial Vi...
Back to Home Execution Stages: For web: HTTP request for Application Incoming request routed to Controller (Perform Routing) The controller processes request and create presentation Model The controller also selects appropriate result (view) Model is passed to View View transforms Model into an appropriate output format (HTML) The response is rendered (HTTP response) Image Courtesy: SlideShare.net Back to Home
Polymorphism means having more than one form. Overloading and overriding are used to implement polymorphism. Polymorphism Examples Method Overloading Method Overriding There are two type of Polymorphism 1. Compile time polymorphism (Early binding or static binding) Examples: overloaded methods, overloaded operators and overridden methods that are called directly by using derived objects. 2. Run time polymorphism (Late binding or dynamic binding) Example: overridden methods that are called using base class object.
Life cycle when the page processed during a postback The events associated with the relevant page cycle phases are: Page Initialization: Page_Init View State Loading:LoadViewState Postback data processing: LoadPostData Page Loading: Page_Load PostBack Change Notification: RaisePostDataChangedEvent PostBack Event Handling: RaisePostBackEvent Page Pre Rendering Phase: Page_PreRender View State Saving: SaveViewState Page Rendering: Page_Render Page Unloading: Page_UnLoad The processing sequence in which a page is processed during a postback event is: Initializing: During this phase, the server creates an instance of the server control Loading view state: During this phase, the view state of the control posted by the client is reloaded into the new instance of the control. Loading : During this phase, the instance of the control is loaded onto the page object in which it is defined. Loading the postback data : During this phase, the server s...
Send Email using Gmail SMTP server-ASP.NET What is an SMTP server? (pronounced as separate letters) Short for S imple M ail T ransfer P rotocol, a protocol for sending e-mail messages between servers. Most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP. In addition, SMTP is generally used to send messages from a mail client to a mail server. This is why you need to specify both the POP or IMAP server and the SMTP server when you configure your e-mail application. Let's see one example in ASP.NET 2.0 (Web Application) In WebMailSend.aspx.cs file You have to import this namespace for MailMessage. using System.Net.Mail; protected void btnSend_Click( object sender, EventArgs e) { try { MailMessage mail = new MailMessage(); mail.IsBodyHtml = true ; mail.To.Add(txtEmail.Text); mail.Subject = txtSubject.Text; mail....
Applying Dynamic Themes to Web Page (.aspx) in ASP.NET Themes and Skins. The themes and skins features in ASP.NET 2.0 allow for easy customization of your site's look-and-feel. You can define style information in a common location called a "theme", and apply that style information globally to pages or controls in your site. Like Master Pages, this improves the maintainability of your site and avoid unnecessary duplication of code for shared styles. protected void Page_PreInit( object sender, EventArgs e) { Page.Theme = Session[ "Theme" ] as string ?? "Theme1" ; } protected void Page_Load( object sender, EventArgs e) { } protected void Button1_Click( object sender, EventArgs e) { if (Session[ "Theme" ] != null ) { if (Session[ "Theme" ].ToString() == "Theme1" ) Session[ "Theme" ] = "Theme2" ; else Session[ "Theme" ] = "Theme1...
1. Clas s is Reference types and Structure is Value type. 2. Clas s supports an Inheritance where as Structure not. 3. Classes are usually used for large amounts of data, whereas Structure are usually used for smaller amount of data. 4. When we instantiate a class, memory will be allocated on the heap and when Structure gets initiated it gets memory on the stack. 5. Classes can have explicit parameter less constructors. But Structure doesn't have this. 6. Classes can be garbage collector because garbage collector works on heap memory . structures can not be garbage collector so no memory management.
we are going to see how to generate sequence number (row number) in DataGrid. To generate sequence number, we will use the DataGridItem’s ItemIndex property. But For example if we are going to second page with Pagesize 3, then sequence number should start from 4. Code snippet for implementing this method is... < asp:DataGrid id ="DataGrid1" runat ="server" PagerStyle-Mode ="NumericPages" PageSize ="10" AutoGenerateColumns ="False" AllowPaging ="True" > < Columns > < asp:templatecolumn headertext ="Row Number" > < itemtemplate > <% # (DataGrid1.PageSize*DataGrid1.CurrentPageIndex)+ Container.ItemIndex+1 %> </ itemtemplate > </ asp:templatecolumn > < asp:boundcolumn runat ="server" Da...
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