ASP.NET Lecture 4
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The document discusses ASP.NET 4.0 and covers topics like data binding, rich data controls, and n-tier architecture. It provides information on programatic and declarative data binding. Rich data controls like GridViews can be bound to data. N-tier architecture separates the user interface, business logic, and data access layers. This improves maintenance and flexibility. Data source controls allow binding database queries to controls without code.
![REFERENCES
[1] Beginning ASP.NET 4 In C# 2010, Matthew
Macdonald, Apress
[2] Web Application Architecture
Principles, Protocols And Practices, Leon Shklar
And Richard Rosen, Wiley
[3] Professional AS P.NE T 4 In C# And VB, Bill
Evjen, Scott Hanselman And Devin Rader, Wiley
[4] Pro ASP.NET In C# 2010, Fourth
Edition,matthew Macdonald, Adam Freeman, And
Mario Szpuszta, Apress](https://image.slidesharecdn.com/asp-net-lect4-130212112729-phpapp01/85/ASP-NET-Lecture-4-28-320.jpg)
ASP.NET Lecture 4
- 1. ASP.NET 4.0 Julie Iskander MSC. Communication and Electronics
- 2. Lecture Outlines Data Binding Rich Data Controls n-tier architecture
- 3. Data Binding
- 4. Programatic DataBinding Using Control Properties ◦ DataSource a collection (a list, reader, dataset) ◦ DataTextField ◦ DataValueField Don’t forget to DataBind();
- 5. Declarative Data Binding Single-value Binding Repeated-value Binding
- 6. Single-Value Binding <%# expression goes here %> Expression can be: ◦ A function (must be protected, public) ◦ A property (must be protected, public) ◦ A string literal or an mathematical expression Bound to TextBox, Label, LinkButton,….etc Must call Page.DataBind() or Control.DataBind()
- 7. Repeated-Value Binding Use DataSource to bind to collection and Use DataTextField and DataValueField to bind the Value and Text of the control in the aspx Never forget to call DataBind()
- 8. Convert from an HTML to an aspx page
- 10. Rich Data Controls Binding GridViews, DetailViews,FormView Create a link between the data object and the data cotrol OR Finally,
- 11. Convert from an HTML to an aspx page
- 12. Data Source Controls Directly connect to a database, execute a query, loop through the records in the result set, and display them on a page. Designer Support No data access code. Includes: ◦ SqlDataSource ◦ ObjectDataSource ◦ AccessDataSource ◦ XmlDataSource ◦ SiteMapDataSource
- 13. Data Source Controls Displaying Inserting Updating Deleting
- 14. Data Source Binding in the Page Life Cycle 1. Page Initialization and Page Load 2. Control events handling 3. Data source controls perform updates (insert, update, delete) 4. Page PreRender 5. Data source controls performs queries and fill controls (Selecting and Selected Events fired) 6. Page is rendered then Disposed
- 15. Convert from an HTML to an aspx page
- 19. N-Tier Architecture Database code MUST NOT be directly in the client, but encapsulated in classes. Easier maintenance and extension Appropriate for all types of applications (small/medium/large and desktop/Web) applications. Implementation: ◦ Create the front-end user interface (Windows Forms or Web Forms) ◦ Create the business rule component class library ◦ Create a data layer component class library to
- 20. N-tier layers User Interface Business Access Layer (BAL) to wrap the business rules and logic (if needed) Business Object Layer (BOL) to wraps each database table or business object Data Access Layer (DAL) to perform database operations
- 23. ObjectDataSource Controls Use ObjectDataSource is used with the DAL classes Instead of SQLDataSource Controls ◦ Maintenance nightmare ◦ Lack of flexibility
- 24. Convert from an HTML to an aspx page
- 25. Reading Assignment #4 Using Stored Procedures Designing layered .NET Applications http://msdn.microsoft.com/en- us/library/ms973829.aspx
- 26. Lab #4 Bind Categories in regiter.aspx to Categories table through SQLdatasource control Add a new Customer through the registeration Page by using a data component Create Page to see and edit all Customer Data using DetailsView or FormView
- 27. Bonus Add a page to see, edit , insert new books and upload images
- 28. REFERENCES [1] Beginning ASP.NET 4 In C# 2010, Matthew Macdonald, Apress [2] Web Application Architecture Principles, Protocols And Practices, Leon Shklar And Richard Rosen, Wiley [3] Professional AS P.NE T 4 In C# And VB, Bill Evjen, Scott Hanselman And Devin Rader, Wiley [4] Pro ASP.NET In C# 2010, Fourth Edition,matthew Macdonald, Adam Freeman, And Mario Szpuszta, Apress