By Vincent Varallo

The ASP.NET company program improvement ebook, that's a part of the Problem/Design/Solution sequence, is setup as a e-book that illustrates the matter first, then strikes to the layout (and seems to be at a number of layout possibilities), and finally ends up with the answer to enforce. The pattern undertaking for this publication is a time-tracking chance, an software to log employee's time.

Each bankruptcy of the publication appears to be like to format the basics of a company software, beginning with the information entry, enterprise, and presentation layers. the remainder of the booklet is spent many of the positive aspects that the appliance wanted (exception dealing with, safeguard, workflow, etc.). many of the situations within the chapters use a code-specific implementation to fixing the matter, instead of utilizing different instruments on hand to builders (for example, the workflow bankruptcy does not leverage home windows Workflow Foundation). notwithstanding there are a couple of instruments used, like Crystal experiences and company Library.

The publication has an enticing strategy in the way it implements the company good judgment; enterprise purposes are a lot diverse than own sites and different program forms simply because they depend upon the luck in their company principles. that's one of many focuses of the e-book, constructing how you can constitution your code so you may possibly deal with some of the enterprise wishes of the application.

The chapters that create particular positive aspects for the appliance (reporting, workflow, etc.) use a code-specific method of developing those beneficial properties. The e-book lays out the adjustments to the database and information version, illustrates the kept tactics for the swap, after which strikes into the layout answer. each one new function has a brand new ASP.NET web page that he demonstrates absolutely in addition to any adjustments to kinds, grasp pages, and so forth. each one publication discusses the bankruptcy to the fullest aspect, from the proc to the completed solution.

The kind of the ebook ordinarily 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 publication does speak about a number of the elements that it does use to accomplish the answer (such as Crystal reviews for reporting and company Library for exception handling).

I hoped the booklet used to be going to appear extra into utilizing a variety of layout styles inside ASP.NET. even if there are a few, the structure is pretty well an identical in the course of the program. also, the UI later does not use a lot ASP.NET AJAX JavaScript implementations or a script library like JQuery, yet leverages lots of the good judgment at the server-side and, while useful, leverages the replace panel control.

While i do not be aware of that i might use an analogous structure, I do like many of the good points he applied within the app and glance to determine how i'll make the most of this for my very own improvement.

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A property was added to this class called HRPaidTimeOffConnectionString, which returns the connection string that is passed into the parameterless constructor above. Essentially, the connection string is in the Settings file. indd 26 12/18/08 9:05:35 AM Chapter 2: The Data Access Layer Click back to the HRPaidTimeOffDataContext class. GetTable(); } } This property will return a generic Table object that contains objects of type ENTUserAccount. The Table object is a new object in the Linq namespace.

The data layer must also address the issue of transactions. A transaction ensures that when you are updating two or more tables at the same time, they are all committed to the database if all statements succeed. If one call to a table fails, then none of the statements should be committed to the database. Some design patterns have all transactions in stored procedures, others manage them in the data layer, while others manage them in the business layer. There are advantages and disadvantages to each option; what matters is that your choice works for your application and that the design pattern is implemented consistently throughout the entire application.

This graphical tool will map tables to entity classes, and stored procedures to methods, in the DataContext object. Drag and drop the ENTUserAccount table from the Server Explorer onto the left side of the design surface. If you are using SQL Authentication, you will get a message about the connection string containing credentials with a clear-text password and not using integrated security. Click Yes to the message. If you use Windows Authentication, the message does not appear. indd 25 12/18/08 9:05:35 AM Chapter 2: The Data Access Layer The table and all the fields should appear on the design surface (see Figure 2-4).

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