: One to many relationship and ObjectStateManager error

Understand basic navigation with Entity Framework Code First (4.3) with 1 to many relationship

http://patrickdesjardins.com/blog/understand-basic-navigation-with-entity-framework-code-first-4-3-with-1-to-many-relationship

Entity Framework 4.3: An object with the same key already exists in the ObjectStateManager

http://patrickdesjardins.com/blog/entity-framework-4-3-an-object-with-the-same-key-already-exists-in-the-objectstatemanager

Microsoft Links : MVC 3, MVC 4 tutorials

Table of Contents

MVC 4

·         ASP.NET MVC 4 Mobile Features

·         Getting Started with ASP.NET MVC 4

·         Using Page Inspector in ASP.NET MVC

·         Getting Started with ASP.NET MVC 4 and Visual Studio 2012

·         Using Asynchronous Methods in ASP.NET MVC 4

·         Bundling and Minification

·         Using OAuth Providers with MVC 4

·         ASP.NET MVC Facebook Birthday App

·         Custom MVC Template

MVC Music Store

·         Part 1: Overview and File->New Project

·         Part 2: Controllers

·         Part 3: Views and ViewModels

·         Part 4: Models and Data Access

·         Part 5: Edit Forms and Templating

·         Part 6: Using Data Annotations for Model Validation

·         Part 7: Membership and Authorization

·         Part 8: Shopping Cart with Ajax Updates

·         Part 9: Registration and Checkout

·         Part 10: Final Updates to Navigation and Site Design, Conclusion

Getting Started with EF using MVC

·         Creating an Entity Framework Data Model for an ASP.NET MVC Application (1 of 10)

·         Implementing Basic CRUD Functionality with the Entity Framework in ASP.NET MVC Application (2 of 10)

·         Sorting, Filtering, and Paging with the Entity Framework in an ASP.NET MVC Application (3 of 10)

·         Creating a More Complex Data Model for an ASP.NET MVC Application (4 of 10)

·         Reading Related Data with the Entity Framework in an ASP.NET MVC Application (5 of 10)

·         Updating Related Data with the Entity Framework in an ASP.NET MVC Application (6 of 10)

·         Handling Concurrency with the Entity Framework in an ASP.NET MVC Application (7 of 10)

·         Implementing Inheritance with the Entity Framework in an ASP.NET MVC Application (8 of 10)

·         Implementing the Repository and Unit of Work Patterns in an ASP.NET MVC Application (9 of 10)

·         Advanced Entity Framework Scenarios for an MVC Web Application (10 of 10)

·         ASP.NET Data Access Content Map

Views

·         Introducing ASP.NET Web Pages 2 - Programming Basics

·         Dynamic v. Strongly Typed Views

Controllers and Routing

·         ASP.NET MVC Controller Overview (C#)

·         Creating Custom Routes (C#)

·         Creating a Route Constraint (C#)

·         Creating a Custom Route Constraint (C#)

·         ASP.NET MVC Controller Overview (VB)

·         Creating Custom Routes (VB)

·         Creating a Route Constraint (VB)

·         Creating a Custom Route Constraint (VB)

Security

·         Preventing Open Redirection Attacks (C#)

·         Using OAuth Providers with MVC 4

JavaScript

·         Using the HTML5 and jQuery UI Datepicker Popup Calendar with ASP.NET MVC

·         Working with the DropDownList Box and jQuery

Deployment

·         ASP.NET Web Deployment using Visual Studio 2012

·         Deploying an ASP.NET MVC Application to a Windows Azure Web Site and SQL Database

·         ASP.NET Web Deployment with SQL Server Compact using Visual Studio

·         .NET Multi-Tier Application Using MVC 4 and Windows Azure Storage Tables, Queues, and Blobs

·         How to deploy an ASP.NET web application to a Windows Azure Web Site using Visual Studio

Getting Started with ASP.NET MVC3

·         Getting Started with ASP.NET MVC 3 (C#)

·         Getting Started with ASP.NET MVC 3 (VB.NET)

Older Versions

·         Getting Started With MVC

·         Models (Data)

·         ASP.NET MVC Views

·         Controllers and Routing

·         Deployment

·         Security

·         Unit Testing

·         Contact Manager

·         NerdDinner

·         Movie Database

·         JavaScript

·         Overview

Hands On Labs

·         What's New in ASP.NET MVC 4

·         ASP.NET MVC 4 Fundamentals

·         ASP.NET MVC 4 Models and Data Access

·         ASP.NET MVC 4 Custom Action Filters

·         ASP.NET MVC 4 Entity Framework Scaffolding and Migrations

·         ASP.NET MVC 4 Dependency Injection

·         ASP.NET MVC 4 Helpers, Forms and Validation

MVC 5

·         Introduction to ASP.NET MVC 5

·         Create an ASP.NET MVC 5 App with Facebook and Google OAuth2 and OpenID Sign-on (C#)

Some More MVC links

1. Difference between MVC and ASP :

http://msdn.microsoft.com/en-us/library/dd381412(v=vs.98).aspx




2. Razor Syntax

MS Article : Introduction to ASP.NET Web Programming Using the Razor Syntax (C#)

http://www.asp.net/web-pages/tutorials/basics/2-introduction-to-asp-net-web-programming-using-the-razor-syntax

C# Razor Syntax Quick Reference

http://haacked.com/archive/2011/01/06/razor-syntax-quick-reference.aspx

3. Shivaprasad MVC tutorials :

http://www.dotnetfunda.com/articles/article1846-mvc-tutorial-number-12-what-is-razor-in-mvc-3.aspx


4. A good basic tutorial and contains many links :

ASP.NET MVC3 Razor With jQuery For Beginners

http://www.codeproject.com/Articles/344292/ASP-NET-MVC3-Razor-With-jQuery-For-Beginners

5.httpnotfound

ASP.NET MVC 3: Using HttpNotFoundResult action result

http://weblogs.asp.net/gunnarpeipman/archive/2010/07/27/asp-net-mvc-3-using-httpnotfoundresult-action-result.aspx



6. Types of helpers in MVC :

form, url and html.



===========================
action is any public method in a controller.

If a public method in a controller is not supposed to work as action, it should be decorated with [NonAction] attribute.


Base to all action results is ActionResult

Types of ActionResult :
ViewResult
PartialViewResult
RedirectResult
RedirectToRouteResult
ContentResult
JsonResult
JavaScriptResult
FileResult
EmptyResult



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what is @Scripts.Render ?

what is RenderSection ?what is @RenderBody ?
what are <section> , <nav> tags ?

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