Goal: Bringing data to the web and back :-) Old Style New Style DataBinding DataGrid Input Validation

1. Developing Windows and Web Applications using Visual Studio.NET Eric Phan Solution Architect

4. Recap

5. 1 2

8. Old Style

9. New Style

10. DataBinding

11. DataGrid

13. Data

14. Bring database to the web Show/view Data Enter

15. OLD way

16. What is ADO.NET? Set of classes that expose data access services to the .NET programmer ADO.NET provides a rich set of components for creating distributed, data-sharing applications It is an integral part of the .NET Framework, providing access to relational data, XML, and application data

17. WebForm Apps WinForm Apps ADO.NET DataSets SQLConnection SQLCommand SQLDataAdapter SQLDataReader SQL Data Providers SQL Data XML Data Oracle Data …

18. Objects Instead of DataSets we use classes Extensible Can embed logic and validation A more OO approach

19. WebForm Apps WinForm Apps Objects/Entities Data Sources SQL Data XML Data Oracle Data …

20. DataSets or Business Objects Why use DataSets A highly functional container for data that can be strongly typed Automatic change tracking for contained data Seamless data-binding support Why Use Objects Business Objects (NHibernate, NTiers, LINQ to SQL, LINQ to Entities) Light weight Good data-binding support Extensible and OO Very easy to use No SQL command Strings

21. The new way!LINQ 2 EntitiesLINQ 2 SQL

22. LINQ to SQL/Entities Brand new in the .NET 3.5 Framework Easily access and query your database through classes Logical access to class hierarchies Supports Inheritance Intuitive to use

23. DBML File Database Mapping Language Contains a mapping of classes to database tables Has built in logic to handle selection, updates and deletes Can be customized www.hookedonlinq.com

24. var customers = from c in db.Customers where c.FirstName.StartsWith(“A”) select c SQL Syntax

25. var customers = db.Customers.Where(c => c.FirstName.StartsWith(“A”); Lambda Syntax

26. Challenge, use this instead of SQL Server Management Studio for a month LINQPad

28. See our Rules http://www.ssw.com.au/ssw/Standards/Rules/RulesToBetterLINQ.aspx

29. Databinding

30. Bind the data Data Data source

31. Data Binding Data Data source From MSDN: Data binding is the process that establishes connection between the application UI and business logic Binding controls to data from database Bind a grid on Webform to a database table Simple, convenient, and powerful way to create a read/write link between the controls on a form and the data in their application

32. Databinding the GridView (code) C# NorthwindDataContext db = newNorthwindDataContext(); GridView1.DataSource = db.Customers; GridView1.DataBind(); English Instantiate our data access class Make the datasource of GridView1 all the customers from our database Bind the Grid

33. Databinding the GridView (designer)

34. Databinding the GridView (designer)

35. Databinding the GridView (designer)

36. Databinding the GridView (designer)

37. Databinding the GridView (designer)

38. Databinding the GridView (running)

40. Display a Table from a Database

41. Easy to configure

43. Enabling these features Enable Delete, Insert, Update on the DataSource

44. Enabling these features Enable them on the GridView

45. Easy!

46. Other Data Bindable Web Controls Bindable to Lists DataList DetailsView FormView Repeater/ListView DropDownList ListBox CheckBoxList RadioButtonList Bindable to Properties/Columns Most other controls

47. Data-Bound Controls Most controls in .NET Framework support data binding Controls inherit from the WebControl base classwhich implements IDataBindingsAccessorinterface Important Data-binding properties DataSource DataMember DisplayMember ValueMember Design your own controls or purchase 3rd party controls

48. Passing Parameters

49. Passing Parameters between pages Pass parameters to pages or controls Pass parameters to our data sources Parameters can be obtained from: Query String Session Variable Control Property Hidden Field Cookie

50. 1. Create a CustomerDetails.aspx Add a Details View and create a new Datasource

51. 2. Create a LINQ Data Source

52. 3. Specify the Where clause

53. 4. Make it read from the Query String

54. 5. Change the Select on the GridView to Link to the CustomerDetails Page

55. 6. Edit the templates

56. 7. Delete Select and Add a Hyperlink

57. 8. Configure the Hyperlink CustomerDetails.aspx?CustomerID={0}

58. Run it

59. Validation – Don’t trust anyone

60. Validation - Bring database to the web Show/view Data Enter

61. Validation Why do we need it? PEBCAC Bad Data

62. Input Validation

63. Why use Validations? Seamless verification of data fields Check for mandatory fields Check for correct data formats Check for data ranges Reduces incorrect data entered into your database Prevent possible runtime exceptions

64. Validation Types Client Show/view Data Enter Client Server

65. Validation Types Client-Side Validation Validations are performed before the form is posted back Quick and responsive for the end user Insecure Server-Side Validation Validation checks are performed on the server Secure because these checks cannot be easily by passed Sometimes can be slow Recommendation Use both the types This approach provides the best of both worlds Client Show/view Data Enter Client Server

66. ASP.NET Validation Server Controls RequiredFieldValidator CompareValidator RangeValidator RegularExpressionValidator CustomValidator ValidationSummary

67. To put the Northwind database up on the web? CRUD for all tables Pages for all tables Validation So how long do you think it would take...

68. 1 line of code 5 Minutes

69. Awesome starting point Learn more from http://www.asp.net/dynamicdata/ ASP.NET Dynamic Data

70. Extend what’s given to you and you can make really great websites You can use it as a framework

72. Any issues ... questions PeterGfader@ssw.com.au EricPhan@ssw.com.au

73. Thank You! Gateway Court Suite 10 81 - 91 Military Road Neutral Bay, Sydney NSW 2089 AUSTRALIA ABN: 21 069 371 900 Phone: + 61 2 9953 3000 Fax: + 61 2 9953 3105 info@ssw.com.auwww.ssw.com.au

74. Resources www.hookedonlinq.com http://www.asp.net/get-started/ http://weblogs.asp.net/scottgu/ http://www.asp.net/dynamicdata/ If you have the next awesome web ideahttp://www.microsoft.com/BizSpark/ http://www.ssw.com.au/ssw/Standards/Rules/RulesToBetterLINQ.aspx