Dotnet Frame Work and Controls
- 1. DOT NET FRAMEWORK AND CONTROLS A Programme Under the Compumitra Education Series
- 2. OUTLINE • Concept of Dot Net Framework? • Dot Net Framework Concept Vs Java Concept • Concept and purpose of Controls. • Types of Controls • HTML Server Controls • Webforms ServerControls • Validation Controls • Other Controls
- 3. • DOT NET FRAMEWORK is an add-on software over the operating system. • It provides the library of software functions (Called Classes) that can be called from the application software to get the desired functionality. • It provides a unique feature to support multiple language such as C#, Visual Basic and many more by providing compilation facilities for them. • It provides compilation of user’s application to an intermediate language (Common Intermediate Language – CIL) so that it is largely platform independent. Concept of DOT NET Framework - 1 Hardware Operating System Dot Net Framework Application Code CIL M/C L
- 4. • By itself it follows a layered architecture to provide various services. • Common Language Runtime (CLR) to understand the CIL, memory management, security and exceptions. • Base Class Library (BCL) to provide the basic functionality of User Interface, Data Access, Algorithms, Networking etc. • WinForms for forms provided by console applications or single machine applications. • ASP.Net for web related functionality. • ADO.NET for database access related functionality. • More components have been added in recent releases of this stack that shall be discussed in the advanced courses. DOT NET Framework Stack Common Language Runtime Base Class Library Win Forms ASP .NET ADO .NET DOT NET Framework Stack
- 5. • Concept of DOT Net is quite similar to Java Virtual Machine Concept. The primary difference however was to focus on language independence rather than platform independence. DOT NET Framework Vs. Java Hardware MS Operating System Dot Net Framework Any Language Application Code CIL M/C L Hardware Any Operating System Java Virtual Machine Java Application Code Bytecode M/C L Microsoft Dot Net Sun Java
- 6. Concept and Purpose of Controls • Controls are prewritten library classes provided by the language for providing predefined parameters to be handled by them. • Controls ease-up many day to day tasks for a programmer. For e.g. a Text Box defines a predefined area with predefined font and colors etc to enter some text by the application user. What can be further configured by a programmer in a control is also defined. • Most common user interfaces are designed using forms that are full of controls like Label, Text Box, Check Box, Radio Control, Button, Text Area, Selection List Etc. • Controls are also the most common components that a programmers deal in day to day life. • Concept of controls can be further extended to custom defined logic building, such one may find a control to convert Centigrade to Fahrenheit
- 7. • The main controls provided by ASP.NET are: – HTML Server Controls – Webforms Server Controls – Validation Controls • In the advanced sections we shall also see that ASP.NET provides a facility of creating User’s own control by using any combination of current controls or completely a new control. Major Types of ASP.NET Controls We shall try to focus on server end controls. Client end controls are basically provided by HTML syntax itself.
- 8. • These controls are similar in construct with the regular HTML style forms features. The main difference is however that these controls are interpreted and converted at the server end itself. • For e.g. <a id="link1" runat="server">Visit Sunmitra Site</a> would be an HTML Server control while <a href=www.sunmitra.com>Visit Sunmitra Site</a> would be an regular HTML syntax. • In first case the id and runat attribute relate to running it at server end and thus href declaration will also be made separately in the programme code. • Other HTML server controls are for button, checkbox, radiobutton, image, table,textarea etc. HTML Server Controls
- 9. • These controls are exclusively defined by ASP.NET library only. • Things like AdRotator, Calendar, Datalist, ListBox, XML, Imagebutton and extended forms of Table, CheckBox, Radiobutton etc are classified here. • Here ASP.NET designers have taken full liberty to design their own set of attributes that may be quite different from HTML syntax. • These controls provide the real power to web-based forms designing. • Remember that even these controls will finally be depicted on the web browser side using standard HTML syntax only. Webforms Server Controls
- 10. • These controls provide an easy way for form entry validations that was earlier required to be provided by client side programming such as javascript etc. • For e.g. syntax like below <asp:RangeValidator ControlToValidate="tbox1" MinimumValue="1" MaximumValue=“60" Type="Integer" Text="The value must be from 1 to 60!" runat="server" /> Can validate that a user fills the value between 1 to 60 only. • Actually a validation control is a neat way to tell the server to automatically add the required client side script (usually the javascript) before sending the data towards the browser. • The validation control is powerful as it is efficient and saves a lot of server time to check petty things that can be done at the client end itself. Validation Controls
- 11. Other Controls • There is a big range of other controls that are available free or paid from 3rd party developers. • These include things like – Colour selection. – Multiline Text Editing. – Image Editing. – Progressbar – Tickers. – Imagecombobox. – Map Controls. – Mediaplayer controls. – Popupmenus. – Graph Displays etc.
- 12. • Ask and guide me at sunmitraeducation@gmail.com • Share this information with as many people as possible. • Keep visiting www.sunmitra.com for programme updates.