By Vincent Varallo
The ASP.NET company program improvement ebook, that's a part of the Problem/Design/Solution sequence, is setup as a booklet that illustrates the matter first, then strikes to the layout (and appears to be like at a variety of layout possibilities), and finally ends up with the answer to enforce. The pattern undertaking for this booklet is a time-tracking chance, an software to log employee's time.
Each bankruptcy of the booklet seems to be to structure the basics of a enterprise program, beginning with the information entry, enterprise, and presentation layers. the remainder of the publication is spent taking a look at a number of the positive aspects that the applying wanted (exception dealing with, safety, workflow, etc.). lots of the eventualities within the chapters use a code-specific implementation to fixing the matter, instead of utilizing different instruments to be had to builders (for example, the workflow bankruptcy does not leverage home windows Workflow Foundation). even though there are a number of instruments used, like Crystal experiences and company Library.
The publication has an engaging strategy in the way it implements the enterprise good judgment; company functions are a lot varied than own sites and different software kinds simply because they depend upon the good fortune in their enterprise principles. that's one of many focuses of the ebook, developing the way to constitution your code so you might deal with a few of the enterprise wishes of the application.
The chapters that create particular gains for the appliance (reporting, workflow, etc.) use a code-specific method of growing those beneficial properties. The publication lays out the alterations to the database and knowledge version, illustrates the saved techniques for the swap, after which strikes into the layout resolution. every one new function has a brand new ASP.NET web page that he demonstrates absolutely in addition to any alterations to types, grasp pages, and so on. each one publication discusses the bankruptcy to the fullest element, from the proc to the completed solution.
The sort of the booklet as a rule follows the reason of the enterprise challenge before everything. while the booklet illustrates code, the writer exhibits the code first, and follows up with a proof of the answer. within the layout part, the booklet does talk about many of the elements that it does use to accomplish the answer (such as Crystal experiences for reporting and firm Library for exception handling).
While i do not recognize that i'd use an identical structure, I do like a few of the positive factors he carried out within the app and glance to work out how i could make the most of this for my very own improvement.
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Additional info for ASP.NET 3.5 Enterprise Application Development with Visual Studio 2008: Problem Design Solution (Wrox Programmer to Programmer)
SubmitChanges()saves the changes to the database. Again, all that without writing a single SQL statement! As you might have noticed in this example, the record was first retrieved from the database, changed, and then saved back to the database. This pattern will not work for web applications because you typically retrieve a record from the database, display it on the screen, wait for the user to click a button to submit the changes back to the server, and then pass the data to your DAL to execute an UPDATE SQL statement.
If you needed the flexibility to traverse back and forth in a cursor, you would have to use a DataSet. Fill(ds, “UserAccount”); } Notice that another object called the SqlDataAdapter is used to fill the DataSet with records. The second parameter to the fill method is the name of the DataTable you want to create in the DataSet. The DataAdapter object is provided by each provider, and it knows how to populate a DataSet. It also knows how to add, update, and delete records when you send a DataSet back to the database.
Pretty cool stuff, isn’t it? aspx page and set the ID to btnUpdate and the Text to Update. SubmitChanges(); } The first line creates an instance of the HRPaidTimeOffDataContext. The next line retrieves the record from the ENTUserAccounts table, where the WindowsAccountName equals VARALLO1\ VaralloMadison. The Single method enables you to tell Linq to return one record with the criteria; and if no records are found, to throw an error. Behind the scenes, Linq is actually creating a SELECT SQL statement for you.