MVC 4 project templates

MVC 4

	Wednesday, November 26, 2014 8:47 PM
			Not these project templates…..

...but the next step, THESE project templates:

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Empty

Wednesday, November 26, 2014

8:45 PM

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Basic

Wednesday, November 26, 2014

8:40 PM

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Internet Application

Wednesday, November 26, 2014

8:20 PM

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							After you run it and Register a user, creates db.
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Intranet Application

Wednesday, November 26, 2014

8:35 PM

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Access is denied.

http://localhost:16286/

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Created with Microsoft OneNote 2010
One place for all your notes and information

Sure, throw a null-coalescing operator into an intro tutorial on MVC EF

"

int pageSize = 3;
int pageNumber = (page ?? 1);
return View(students.ToPagedList(pageNumber, pageSize));

The ToPagedList method takes a page number. The two question marks represent the null-coalescing operator. The null-coalescing operator defines a default value for a nullable type; the expression (page ?? 1) means return the value of page if it has a value, or return 1 if page is null.

"

Can't be surprised since he loves the Ternary Operator.

Some links on Ternary Operators:

http://stackoverflow.com/questions/694814/ternary-operator-bad-or-best-practice

http://programmers.stackexchange.com/questions/28314/ternary-operator-considered-harmful

http://thedailywtf.com/articles/One-Bad-Ternary-Operator-Deserves-Another

https://agiletribe.wordpress.com/2011/11/01/21-avoid-ternary-conditional-operator/

http://discuss.fogcreek.com/joelonsoftware/default.asp?cmd=show&ixpost=142517

http://en.wikipedia.org/wiki/Talk%3A%3F%3A
"I don't know how to do so, but this page should be flagged as being a very biased viewpoint. The text runs counter to my experience of 20+ years as a professional software programmer. The only people who prefer the ternary conditional operator to the more readable if-then-else format (when both are allowed by the language syntax) are those people who have never had to maintain other people's code bases for any significant period of time. This opinion is found in industry standard texts, such as "Code Complete" by Steve McConnell. I would love to see a valid citation supporting the viewpoint presented here, i.e. that the ternary operator is NOT considered to be antiquated, harder to debug, and harder to maintain."

Azure and FTP

"

To use an FTP tool, you need three things: the FTP URL, the user name, and the password.

The URL is shown on the web site's dashboard page in the Windows Azure Management Portal, and the user name and password for FTP can be found in the .publishsettings file that you downloaded earlier. The following steps show how to get these values.

1. In the Windows Azure Management Portal, click Web Sites tab and then click the staging web site.
2. On the Dashboard page, scroll down to find the FTP host name in the Quick Glance section.
   
3. Open the staging .publishsettings file in Notepad or another text editor.
4. Find the publishProfile element for the FTP profile.
5. Copy the userName and userPWD values.
   
6. Open your FTP tool and log on to the FTP URL.
7. Copy app_offline.htm from the solution folder to the /site/wwwroot folder in the staging site.
   
8. Browse to your staging site's URL. You see that the app_offline.htm page is now displayed instead of your home page."

UPDATE

Getting this, so doesn't seem to work:

Response: 150 File status okay; about to open data connection.

Error: Connection timed out

Error: Failed to retrieve directory listing

Random MVC EF stuff

"The Required attribute is not needed for value types such as DateTime, int, double, and float. Value types cannot be assigned a null value, so they are inherently required. "

"

The ForeignKey Attribute

When there is a  one-to-zero-or-one relationship or a  one-to-one relationship between two entities (such as betweenOfficeAssignment and Instructor), EF can't work out which end of the relationship is the principal and which end is dependent.  One-to-one relationships have a reference navigation property in each class to the other class. TheForeignKey Attribute can be applied to the dependent class to establish the relationship. If you omit the ForeignKey Attribute, you get the following error when you try to create the migration:

Unable to determine the principal end of an association between the types 'ContosoUniversity.Models.OfficeAssignment' and 'ContosoUniversity.Models.Instructor'. The principal end of this association must be explicitly configured using either the relationship fluent API or data annotations."



..later one we learn:

"The course entity has a foreign key property DepartmentID which points to the related Department entity and it has aDepartment navigation property. The Entity Framework doesn't require you to add a foreign key property to your data model when you have a navigation property for a related entity.  EF automatically creates foreign keys in the database wherever they are needed. But having the foreign key in the data model can make updates simpler and more efficient. For example, when you fetch a course entity to edit, the  Department entity is null if you don't load it, so when you update the course entity, you would have to first fetch the  Department entity. When the foreign key propertyDepartmentID is included in the data model, you don't need to fetch the Department entity before you update."

Microsoft Azure Obfuscation

"Your Windows Azure Web Site will run in a shared hosting environment, which means it runs on virtual machines (VMs) that are shared with other Windows Azure clients. A shared hosting environment is a low-cost way to get started in the cloud. Later, if your web traffic increases, the application can scale to meet the need by running on dedicated VMs. If you need a more complex architecture, you can migrate to a Windows Azure Cloud Service. Cloud services run on dedicated VMs that you can configure according to your needs."

I added color and highlights ... but I'm not sure that is what Microsoft meant.

SQL Server Express vs. LocalDB

The user instance feature in SQL Server Express also enables you to work with .mdf files, but the user instance feature is deprecated; therefore, LocalDB is recommended for working with .mdf files.
Typically SQL Server Express is not used for production web applications. LocalDB in particular is not recommended for production use with a web application because it is not designed to work with IIS.

In Visual Studio 2012 and later versions, LocalDB is installed by default with Visual Studio. In Visual Studio 2010 and earlier versions, SQL Server Express (without LocalDB) is installed by default with Visual Studio.

C# Virtual vs Abstract

MVC with Entity Framework is forcing us to revisit some details of the C# language that seemed obscure or esoteric at the time we learned them.

LINQ famously did the same (with stuff that only came with # 2.0), with Generics, Delegates, Anonymous Methods, Enumerators and Yield,
(and from C# 3.0, as if created only for the purpose of later usage with LINQ) Local Type Inference, Lambda Expressions, Extension Methods, Object Initialization Expressions, Anonymous Types, and Query Expressions.

An abstract function can have no functionality. You're basically saying, any child class MUST give their own version of this method, however it's too general to even try to implement in the parent class.

A virtual function, is basically saying look, here's the functionality that may or may not be good enough for the child class. So if it is good enough, use this method, if not, then override me, and provide your own functionality.

TODO:
Describe difference between virtual function as opposed to virtual properties.

NB: This post inherited from http://stackoverflow.com/questions/391483/what-is-the-difference-between-an-abstract-function-and-a-virtual-function