ASP.net. Microsoft. Getting Started with. protected void Page_Load(object sender, EventArgs e) { productsdatatable = new DataTable();

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Oswald Charles
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1 Getting Started with protected void Page_Load(object sender, EventArgs e) { productsdatatable = new DataTable(); string connectionstring = System.Configuration.ConfigurationManager.ConnectionStrings ["default"].connectionstring;! SqlConnection cn = new SqlConnection(connectionString); SqlCommand cm = new SqlCommand("select * from Product", cn); Microsoft ASP.net!!!! } SqlDataAdapter da = new SqlDataAdapter(cm); da.fill(productsdatatable); da.dispose(); da = null; cm.dispose(); cm = null; cn.dispose(); cn = null;

2 what are we going to cover? what is the.net framework? getting your environment set up web application or web site? built-in controls structure of web pages master pages security exception handling other topics: Web Matrix, MVC, SQL Azure

3 get in touch

4 who am i? software developer > 15 years clients have been small businesses, large corporations and government entities banks and credit unions, state utilities, NIH, grocery store chains, supreme court of the united states mission critical enterprise software, workflow systems, document management correspondence for congress, energy forecasting, atm fraud detection, remote oil well monitoring basic, visual basic, java, c++, c#, cocoa, php, ruby, {html, javascript, css} oracle, sql server, mysql, object-oriented databases, no-sql databases

5 .net framework basics started in the late 90s as a response to the threat of java 1.0 released in releases since 1.0 current is 4.5.1

6 terms to understand IL (MSIL) - intermediate language. platform independent code. allows you to write your code on linux and execute on windows. IL is JITted to native code at runtime. assembly - binary system in.net. contains the IL (.net code) as well as metadata (location, types, classes, structures contained in the assembly)

7 terms to understand CLR: common language runtime - locates, loads and manages assemblies, memory management, threads CTS: common type system - ensures an int in c# is an int in vb JIT: just-in-time compilation - converts MSIL to native code. next time an object is called, re-use compiled code

8 what if i hate microsoft? technically,.net is an Open Specification - to get ECMA standardization, MS had to promise to freely license / promise not to sue for underlying technologies & patents. Xamerin Studio & Mono: oss ide &.net implementation which runs on Windows, OS X and Linux. with mod_mono, run your asp.net application under apache - no MS software required.

9 first modern version of the.net framework supports 32-bit and 64-bit operating systems added generics, sql server integration partial classes nullable types anonymous methods master pages.net framework history

10 built on the 2.0 framework WPF (new UI technology) WCF (service-based architecture) WF (task-based automation) CardSpace (digital identities).net framework history

11 WPF performance improvements Entity Framework (Object-Relational DB Mapping) LINQ (data agnostic queries).net framework history

12 improved parallel execution on multi-core CPUs NoPIA (embed interop into manage assembly) side-by-side execution for COM objects ASP.Net auto-start new ways to access controls from javascript new version (4.0) of the CLR.net framework history

13 better support for asynchronous file i/o improvements to parallel computing built-in bundling and minification of stylesheets and client-side scripts.net framework history

14 getting set up We ll focus on Windows & Visual Studio Express for Web free download from includes sql server local db

15 web application or web site? Web Application VS Project stores information about project (files, references, etc) explicit compilation, one assembly for entire project explicit namespaces added (defined in project file) Web Site no project file required. all files located in the folder are automatically included automatic compilation (at first call); produces multiple assemblies (1 per page, folder, control ) namespaces must be added manually copy content and compiled assembly, no source files necessary explicit control over assembly name, version, etc. copy content and source files no control over assembly name or version numbers mix languages (c#, vb) in a single site. fix 1 bug, deploy source file.

16 common built-in controls HTML Server controls System.Web.UI.HtmlControls namespace html elements with runat= server attribute anchor, button, form, checkbox, select, table maps directly to html tag non-specific controls map to HtmlGenericControl (e.g div)

17 common built-in controls textbox example: <input type=" " class="form-control" id="exampleinput 2" placeholder="enter ">!! add runat attribute, makes the object visible to server-side code: <input type=" " class="form-control" id="exampleinput 2" placeholder="enter " runat= server">!!

18 common built-in controls Web Server controls System.Web.UI.WebControls namespace declared in html with asp: prefix ( <asp:textbox > ) render to standard html provide additional properties and methods create custom control (ascx) and include in your html style with CssClass attribute

19 common built-in controls Web Server Controls basic web controls (button, textbox, image ) validation controls list controls (data grids, repeaters, check box list): support binding to collections. rich controls (calendars, most 3rd party controls)

20 page and application contexts asp.net maintains information about the current application, pages, user sessions, request, etc. Response: access to output stream (to browser) Response.Write("Hello Word!"); Request: access to the incoming stream (from browser) Request.Form["myTextBox"]; Server: utility methods Application: application-wide (global) methods and events. affects all users Session: easily store / retrieve values between requests. affects only the calling user

21 asp.net pages are mixed html and code files, compiled by the server and sent to the requesting browser

22 what happens when a request is made? designer file MyForm.aspx.designer.cs web form (aspx) master page html code file MyForm.aspx MyForm.aspx.cs

23 aspx files Single-File Page mixes html and programming code in the same file page language="c#" %> add server code in <script runat= server"> tags no compilation necessary updates are as simple as copying file to server demo

24 aspx files Code-Behind split html (.aspx) and code (.cs or.vb) in different files CodeFile (Web Site Project) or CodeBehind (Web Application) Advantages: cleaner separation of concerns only expose page markup when deployed can reuse code demo

25 page lifecycle Request: before life cycle begins. determines if page needs to be parsed and compiled (begins life cycle), or if cached page can be sent Start: Request and Response are set, IsPostback is set, sets culture Init: master page and themes are applied Load: load controls with view state and control state, properties are available, methods are generally called Postbacks: handle and postback events, validator runs Render: save view state, outputs html to response stream Unload: page has been rendered and sent to client. cleanup is performed

26 Master Pages ASP.NET master pages allow you to define a consistent look and feel across your site without explicitly applying it to each page.

27 Master Pages Place the content of your page within the <ContentPlaceHolder> tags.

28 Master Pages At runtime, the master page and content page are merged, code is executed and the resulting html is sent to the browser

29 security authentication = who are you? authorization = what are you allowed to do?

30 security - authentication windows authentication: uses windows users / groups forms authentication: presents user with username / password login screen anonymous access: everyone allowed in

31 security - authorization controls whether an identity is granted access to a resource set in web.config can be set for users or roles (? (anonymous), * (all)) can be set for http action (get, head, post, * (all))

32 security - oauth & Google ID oauth is available in ASP.Net 4.0 / mvc AspNETMembership Google ID does not require application setup Facebook / Twitter oauth require app setup in developer portal

33 exception handling exceptions bubble-up until a handler is found (last resort is asp.net) code level handling: try{ } catch page level handling: Page_Error private void Page_Error(object sender, EventArgs e) application level handling: Global.asax void Application_Error(object sender, EventArgs e)

34 a few other topics Web Platform Installer Web Matrix MVC Architecture SQL Azure

35 resources download visual studio from lots of tutorials and examples available at feel free to me any time!

36 Q&A Time

37 Thanks!

10267A CS: Developing Web Applications Using Microsoft Visual Studio 2010

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