Good to know!?: .NET – Accessing, Querying and Manipulating data with Entity Framework

Hi,

I gathered some links and resources on data manipulation with the .NET Framework. Hope this helps and works as a reference card what is available:

ADO.NET http://msdn.microsoft.com/en-us/library/e80y5yhx(v=vs.110).aspx
Entity Framework http://msdn.microsoft.com/en-US/data/ef
Configuring Parameters and Parameter Data Types http://msdn.microsoft.com/en-us/library/yy6y35y8(v=vs.110).aspx
.NET Framework Data Providers http://msdn.microsoft.com/en-us/library/a6cd7c08(v=vs.110).aspx
DataSet Class http://msdn.microsoft.com/en-us/library/system.data.dataset.aspx
Retrieving Data Using a DataReader http://msdn.microsoft.com/en-us/library/haa3afyz(v=vs.110).aspx
Entity Framework – Database First http://msdn.microsoft.com/en-us/data/jj206878.aspx
Entity Framework- Code First to a New Database http://msdn.microsoft.com/en-us/data/jj193542.aspx
ADO.NET Entity Data Model Designer http://msdn.microsoft.com/en-us/library/vstudio/cc716685(v=vs.100).aspx
Entity Data Model Wizard http://msdn.microsoft.com/en-us/library/vstudio/bb399247(v=vs.100).aspx
Create Database Wizard (Master Data Services Configuration Manager) http://technet.microsoft.com/en-us/library/ee633799.aspx
Update Model Wizard (Entity Data Model Tools) http://msdn.microsoft.com/en-us/library/vstudio/cc716705(v=vs.100).aspx
Using the DbContext API http://msdn.microsoft.com/en-us/data/gg192989.aspx
Table-per-Type vs Table-per-Hierarchy Inheritance http://blog.devart.com/table-per-type-vs-table-per-hierarchy-inheritance.html
Relational database management system http://en.wikipedia.org/wiki/Relational_database_management_system
ObjectContext Class http://msdn.microsoft.com/en-us/library/system.data.objects.objectcontext(v=vs.110).aspx
DBContext vs ObjectContexts http://www.entityframeworktutorial.net/EntityFramework4.3/dbcontext-vs-objectcontext.aspx
DbContext Class http://msdn.microsoft.com/en-us/library/system.data.entity.dbcontext(v=vs.113).aspx
ObjectContext management http://msdn.microsoft.com/en-us/library/system.data.objects.objectcontext.contextoptions(v=vs.110).aspx
How to: Use Lazy Loading to Load Related Objects http://msdn.microsoft.com/en-us/library/vstudio/dd456846(v=vs.100).aspx
EntityObject Class http://msdn.microsoft.com/en-us/library/system.data.objects.dataclasses.entityobject(v=vs.110).aspx
EdmEntityTypeAttribute Class http://msdn.microsoft.com/en-us/library/system.data.objects.dataclasses.edmentitytypeattribute(v=vs.110).aspx
SerializableAttribute Class http://msdn.microsoft.com/en-us/library/system.serializableattribute.aspx
DataContractAttribute Class http://msdn.microsoft.com/en-us/library/system.runtime.serialization.datacontractattribute.aspx
Entity Framework (EF) Documentation http://msdn.microsoft.com/en-us/data/ee712907.aspx
OData protocol http://www.odata.org/
Open Data Protocol by Example http://msdn.microsoft.com/en-us/library/ff478141.aspx
WCF Data Services Overview http://msdn.microsoft.com/en-us/library/cc668794(v=vs.110).aspx
Using the REST Interface http://msdn.microsoft.com/en-us/library/ff798339.aspx
Understanding Service-Oriented Architecture http://msdn.microsoft.com/en-us/library/aa480021.aspx
WCF Data Services 4.5 http://msdn.microsoft.com/en-us/library/cc668792(v=vs.110).aspx
Advanced using OData in .NET: WCF Data Services http://www.codeproject.com/Articles/135490/Advanced-using-OData-in-NET-WCF-Data-Services
ObjectCache Class http://msdn.microsoft.com/en-us/library/vstudio/system.runtime.caching.objectcache
HttpContext.Cache Property http://msdn.microsoft.com/en-us/library/system.web.httpcontext.cache(v=vs.110).aspx
ASP.NET Application State Overview http://msdn.microsoft.com/en-us/library/ms178594.aspx
ASP.NET Session State Overview http://msdn.microsoft.com/en-us/library/ms178581.aspx
Understanding ASP.NET View State http://msdn.microsoft.com/en-us/library/ms972976.aspx
CacheItemPolicy Class http://msdn.microsoft.com/en-us/library/system.runtime.caching.cacheitempolicy(v=vs.110).aspx
CacheItemPriority Enumeration http://msdn.microsoft.com/en-us/library/system.web.caching.cacheitempriority.aspx
ChangeMonitor Class http://msdn.microsoft.com/en-us/library/system.runtime.caching.changemonitor(v=vs.110).aspx
CacheDependency Class http://msdn.microsoft.com/en-us/library/system.web.caching.cachedependency.aspx
System.Transactions Namespace http://msdn.microsoft.com/en-us/library/system.transactions.aspx
EntityTransaction Class http://msdn.microsoft.com/en-us/library/system.data.entityclient.entitytransaction.aspx
EntityCommand Class http://msdn.microsoft.com/en-us/library/system.data.entityclient.entitycommand.aspx
EntityConnection Class http://msdn.microsoft.com/en-us/library/system.data.entityclient.entityconnection(v=vs.110).aspx
SqlTransaction Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqltransaction.aspx
System.Data.EntityClient Namespace http://msdn.microsoft.com/en-us/library/system.data.entityclient(v=vs.110).aspx
IsolationLevel Enumeration http://msdn.microsoft.com/en-us/library/system.data.isolationlevel.aspx
TransactionScope Class http://msdn.microsoft.com/en-us/library/system.transactions.transactionscope.aspx
System.Xml Namespaces http://msdn.microsoft.com/en-us/library/gg145036(v=vs.110).aspx
XmlWriter Class http://msdn.microsoft.com/en-us/library/system.xml.xmlwriter.aspx
XML Documents and Data http://msdn.microsoft.com/en-us/library/2bcctyt8(v=vs.110).aspx
XmlDocument Class http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx
XmlReader Class http://msdn.microsoft.com/en-us/library/vstudio/system.xml.xmlreader
XPath Examples http://msdn.microsoft.com/en-us/library/ms256086(v=vs.110).aspx
LINQ to XML [from BPUEDev11] http://msdn.microsoft.com/en-us/library/bb387098.aspx
LINQ to XML Overview http://msdn.microsoft.com/en-us/library/bb387061.aspx
XElement Class http://msdn.microsoft.com/en-us/library/system.xml.linq.xelement.aspx
LINQ (Language-Integrated Query) http://msdn.microsoft.com/en-us/library/bb397926.aspx
DbContext.SaveChanges Method http://msdn.microsoft.com/en-us/library/system.data.entity.dbcontext.savechanges(v=vs.113).aspx
DbContext.Set<TEntity> Method http://msdn.microsoft.com/en-us/library/gg696521(v=vs.113).aspx
Object-relational impedance mismatch http://en.wikipedia.org/wiki/Object-Relational_impedance_mismatch
Loading Related Entities (Eager Loading,  Lazy Loading, Explicitly Loading) http://msdn.microsoft.com/en-us/data/jj574232.aspx
Demystifying Entity Framework Strategies: Loading Related Data (Eager Loading,  Lazy Loading, Explicitly Loading) http://msdn.microsoft.com/en-us/magazine/hh205756.aspx
Precompiling LINQ Queries http://msdn.microsoft.com/en-us/magazine/ee336024.aspx
Entity Framework 5: Controlling automatic query compilation http://blogs.msdn.com/b/stuartleeks/archive/2012/06/12/entity-framework-5-controlling-automatic-query-compilation.aspx
Improve Performance with Entity Framework 5 http://devproconnections.com/entity-framework/improve-performance-entity-framework-5
Queries in LINQ to Entities http://msdn.microsoft.com/en-us/library/vstudio/bb399367(v=vs.100).aspx
LINQ to Entities: Basic Concepts and Features http://www.codeproject.com/Articles/246861/LINQ-to-Entities-Basic-Concepts-and-Features
LINQ to Objects http://msdn.microsoft.com/en-us/library/bb397919.aspx
SqlConnectionStringBuilder Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnectionstringbuilder.aspx
ObjectQuery<T> Class http://msdn.microsoft.com/en-us/library/bb345303(v=vs.110).aspx
ObjectQuery Class http://msdn.microsoft.com/en-us/library/system.data.objects.objectquery(v=vs.110).aspx
ObjectQuery.ToTraceString Method http://msdn.microsoft.com/en-us/library/system.data.objects.objectquery.totracestring(v=vs.110).aspx
System.Data.SqlClient Namespace http://msdn.microsoft.com/en-us/library/System.Data.SqlClient(v=vs.110).aspx
SqlConnection Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.aspx
SQL Server Connection Pooling (ADO.NET) http://msdn.microsoft.com/en-us/library/vstudio/8xx3tyca%28v%3Dvs.100%29
DataTable Class http://msdn.microsoft.com/en-us/library/system.data.datatable.aspx
DataSet Class http://msdn.microsoft.com/en-us/library/system.data.dataset.aspx
DataAdapter Class http://msdn.microsoft.com/en-us/library/system.data.common.dataadapter.aspx
SqlCommand Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.aspx
SqlCommand.CommandText Property http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.commandtext(v=vs.110).aspx
CommandType Enumeration http://msdn.microsoft.com/en-us/library/system.data.commandtype(v=vs.110).aspx
SqlDataAdapter Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldataadapter.aspx
SqlCommand.ExecuteScalar Method http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executescalar(v=vs.110).aspx
SqlCommand.ExecuteReader Method http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executereader(v=vs.110).aspx
SqlDataReader Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.aspx
SqlDataReader.Read Method http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx
DbDataAdapter.Fill Method (DataSet) http://msdn.microsoft.com/en-us/library/zxkb3c3d(v=vs.110).aspx
DbDataAdapter.Update Method (DataSet) http://msdn.microsoft.com/en-us/library/at8a576f(v=vs.110).aspx
DataAdapter.AcceptChangesDuringFill Property http://msdn.microsoft.com/en-us/library/system.data.common.dataadapter.acceptchangesduringfill(v=vs.110).aspx
Working with Datasets in Visual Studio http://msdn.microsoft.com/en-us/library/8bw9ksd6%28v%3Dvs.110%29.aspx
SqlParameter Class http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlparameter.aspx
EF Designer TPT Inheritance http://msdn.microsoft.com/en-us/data/jj618293.aspx
Walkthrough: Mapping Table-per-Hierarchy Inheritance in Dynamic Data http://msdn.microsoft.com/en-us/library/dd793152.ASPX
Code First to an Existing Database http://msdn.microsoft.com/en-us/data/jj200620.aspx
Model-First in the Entity Framework 4 http://msdn.microsoft.com/en-us/data/ff830362.aspx
ADO.NET Entity Data Model Designer http://msdn.microsoft.com/en-us/library/vstudio/cc716685(v=vs.100).aspx
The ADO.NET Entity Framework Overview http://msdn.microsoft.com/en-us/library/aa697427(v=vs.80).aspx
ADO.NET Entity Data Model Tools http://msdn.microsoft.com/en-us/library/vstudio/bb399249(v=vs.100).aspx
Plain Old CLR Object(POCO) http://en.wikipedia.org/wiki/Plain_Old_CLR_Object
Working with POCO Entities http://msdn.microsoft.com/en-us/library/vstudio/dd456853(v=vs.100).aspx

Good to know!? C# 5.0 Key Features Reference – Part 2

Hi,

This are copy notes from the main key-points found in the MS 70-483 prep book. This might be useful to someone. A checklist of things in C#.

Also check out the exam link and the actual book:

http://www.microsoft.com/learning/en-us/exam-70-483.aspx

Exam Ref 70-483: Programming in C#

Implement multithreading and asynchronous processing
Using multiple threads can improve responsiveness and enables you to make use of multiple processors.
The Thread class can be used if you want to create your own threads explicitly. Otherwise, you can use the ThreadPool to queue work and let the runtime handle things.
A Task object encapsulates a job that needs to be executed. Tasks are the recommended way to create multithreaded code.
The Parallel class can be used to run code in parallel.
PLINQ is an extension to LINQ to run queries in parallel.
The new async and await operators can be used to write asynchronous code more easily.
Concurrent collections can be used to safely work with data in a multithreaded (concurrent access) environment.
Manage multithreading
When accessing shared data in a multithreaded environment, you need to synchronize
access to avoid errors or corrupted data.
 Use the lock statement on a private object to synchronize access to a piece of code.
 You can use the Interlocked class to execute simple atomic operations.
 You can cancel tasks by using the CancellationTokenSource class with a
CancellationToken.
Implement program flow
 Boolean expressions can use several operators: ==, !=, <, >, <=, >=, !. Those operators
can be combined together by using AND (&&), OR (||) and XOR (^).
 You can use the if-else statement to execute code depending on a specific condition.
 The switch statement can be used when matching a value against a couple of options.
56 Chapter 1 Manage program flow
The for loop can be used when iterating over a collection where you know the number of iterations in advance.
A while loop can be used to execute some code while a condition is true; do-while should be used when the code should be executed at least once.
foreach can be used to iterate over collections.
Jump statements such as break, goto, and continue can be used to transfer control to another line of the program.
Create and implement events and callbacks method
 Delegates can be instantiated, passed around, and invoked.
 Lambda expressions, also known as anonymous methods, use the => operator and
form a compact way of creating inline methods.
 Events are a layer of syntactic sugar on top of delegates to easily implement the
publish-subscribe pattern.
 Events can be raised only from the declaring class. Users of events can only remove
and add methods the invocation list.
 You can customize events by adding a custom event accessor and by directly using the
underlying delegate type.
Implement exception handling
 In the .NET Framework, you should use exceptions to report errors instead of error
codes.
 Exceptions are objects that contain data about the reason for the exception.
 You can use a try block with one or more catch blocks to handle different types of
exceptions.
 You can use a finally block to specify code that should always run after, whether or not
an exception occurred.
 You can use the throw keyword to raise an exception.
 You can define your own custom exceptions when you are sure that users of your code
will handle it in a different way. Otherwise, you should use the standard .NET Framework
exceptions.
Create types
 Types in C# can be a value or a reference type.
 Generic types use a type parameter to make the code more flexible.
 Constructors, methods, properties, fields, and indexer properties can be used to create
a type.
 Optional and named parameters can be used when creating and calling methods.
 Overloading methods enable a method to accept different parameters.
 Extension methods can be used to add new functionality to an existing type.
 Overriding enables you to redefine functionality from a base class in a derived class.
Consume types
 Boxing occurs when a value type is treated as a reference type.
When converting between types, you can have an implicit or an explicit conversion.
An explicit conversion is called casting and requires special syntax.
You can create your own implicit and explicit user-defined conversions.
The .NET Framework offers several helper methods for converting types.
The dynamic keyword can be used to ease the static typing of C# and to improve
interoperability with other languages.
Enforce encapsulation
Encapsulation is important in object-oriented software. It hides internal details and
improves the usability of a type.
Data can be encapsulated with a property.
Properties can have both a get and a set accessor that can run additional code, commonly
known as getters and setters.
Types and type elements can have access modifiers to restrict accessibility.
The access modifiers are public, internal, protected, protected, internal, and private.
Explicit interface implementation can be used to hide information or to implement
interfaces with duplicate member signatures.
Create and implement a class hierarchy
Inheritance is the process in which a class is derived from another class or from an interface.
An interface specifies the public elements that a type must implement.
A class can implement multiple interfaces.
A base class can mark methods as virtual; a derived class can then override those methods to add or replace behavior.
A class can be marked as abstract so it can’t be instantiated and can function only as a base class.
A class can be marked as sealed so it can’t be inherited.
The .NET Framework offers default interfaces such as IComparable, IEnumerable, IDisposable and IUnknown.
Find, execute, and create types at runtime by using reflection
A C# assembly stores both code and metadata.
Attributes are a type of metadata that can be applied in code and queried at runtime.
Reflection is the process of inspecting the metadata of a C# application.
Through reflection you can create types, call methods, read properties, and so forth.
The CodeDOM can be used to create a compilation unit at runtime. It can be compiled or converted to a source file.
Expression trees describe a piece of code. They can be translated to something else (for example, SQL) or they can be compiled and executed.
Manage the object life cycle
 Memory in C# consists of both the stack and the heap.
 The heap is managed by the garbage collector.
 The garbage collector frees any memory that is not referenced any more.
 A finalizer is a special piece of code that’s run by the garbage collector when it removes
an object.
 IDisposable can be implemented to free any unmanaged resources in a deterministic
way.
 Objects implementing IDisposable can be used with a using statement to make sure
they are always freed.
 A WeakReference can be used to maintain a reference to items that can be garbage
collected when necessary.
Manipulate strings
A string is an immutable reference type.
When doing a lot of string manipulations, you should use a StringBuilder.
The String class offers a lot of methods for dealing with strings like IndexOf, LastIndexOf, StartsWith, EndsWith, and Substring.
Strings can be enumerated as a collection of characters.
Formatting is the process of displaying an object as a string.
You can use format strings to change how an object is converted to a string.
You can implement formatting for your own types.
Validate application input
 Validating application input is important to protect your application against both
mistakes and attacks.
 Data integrity should be managed both by your application and your data store.
 The Parse, TryParse, and Convert functions can be used to convert between types.
 Regular expressions, or regex, can be used to match input against a specified pattern
or replace specified characters with other values.
 When receiving JSON and XML files, it’s important to validate them using the built-in
types, such as with JavaScriptSerializer and XML Schemas.
Perform symmetric and asymmetric
encryption
 An asymmetric algorithm uses a public and private key that are mathematically linked.
 Hashing is the process of converting a large amount of data to a smaller hash code.
 Digital certificates can be used to verify the authenticity of an author.
 CAS are used to restrict the resources and operations an application can access and
execute.
 System.Security.SecureString can be used to keep sensitive string data in memory.
Manage assemblies
An assembly is a compiled unit of code that contains metadata.
An assembly can be strongly signed to make sure that no one can tamper with the content.
Signed assemblies can be put in the GAC.
An assembly can be versioned, and applications will use the assembly version they were developed with. It’s possible to use configuration files to change these bindings.
A WinMD assembly is a special type of assembly that is used by WinRT to map non-native languages to the native WinRT components.
Debug an application
Visual Studio build configurations can be used to configure the compiler.
 A debug build outputs a nonoptimized version of the code that contains extra instructions
to help debugging.
 A release build outputs optimized code that can be deployed to a production
environment.
 Compiler directives can be used to give extra instructions to the compiler. You can use
them, for example, to include code only in certain build configurations or to suppress
certain warnings.
 A program database (PDB) file contains extra information that is required when debugging
an application.
Implement diagnostics in an application
 Logging and tracing are important to monitor an application that is in production and
should be implemented right from the start.
 You can use the Debug and TraceSource classes to log and trace messages. By configuring
different listeners, you can configure your application to know which data to send
where.
 When you are experiencing performance problems, you can profile your application to
find the root cause and fix it.
 Performance counters can be used to constantly monitor the health of your applications.
Perform I/O operations
 You can work with drives by using Drive and DriveInfo.
 For folders, you can use Directory and DirectoryInfo.
 File and FileInfo offer methods to work with files.
 The static Path class can help you in creating and parsing file paths.
 Streams are an abstract way of working with a series of bytes.
 There are many Stream implementations for dealing with files, network operations,
and any other types of I/O.
 Remember that the file system can be accessed and changed by multiple users at the
same time. You need to keep this in mind when creating reliable applications.
 When performing network requests, you can use the WebRequest and WebResponse
classes from the System.Net namespace.
 Asynchronous I/O can help you create a better user experience and a more scalable
application.
Consume data
 ADO.NET uses a provider model that enables you to connect to different types of
databases.
 You use a DbConnection object to create a connection to a database.
 You can execute queries that create, update, read, and delete (CRUD) data from a
database.
 When creating queries it’s important to use parameterized queries so you avoid SQL
injection.
Objective 4.3: Query and manipulate data and objects by using LINQ CHAPTER 4 291
You can consume a web service from your application by creating a proxy for it.
You can work with XML by using the XmlReader, XmlWriter, XPathNavigator, and XmlDocument classes.
Query and manipulate data and objects by using LINQ
 LINQ, which stands for Language Integrated Query, is a uniform way of writing queries
against multiple data sources.
 Important language features when working with LINQ queries are implicit typing, object
initialization syntax, lambdas, extension methods, and anonymous types.
 You can use LINQ with a method-based syntax and the query syntax.
 LINQ queries are deferred-execution, which means that the query executes when it is
first iterated.
 You can use LINQ to XML to query, create, and update XML.
Serialize and deserialize data
 Serialization is the process of transforming an object to a flat file or a series of bytes.
 Deserialization takes a series of bytes or a flat file and transforms it into an object.
 XML serialization can be done by using the XmlSerializer.
 You can use special attributes to configure the XmlSerializer.
 Binary serialization can be done by using the BinaryFormatter class.
 WCF uses another type of serialization that is performed by the DataContractSerializer.
 JSON is a compact text format that can be created by using the DataContractJsonSerializer.
Store data in and retrieve data from collections
 The .NET Framework offers both generic and nongeneric collections. When possible,
you should use the generic version.
 Array is the most basic type to store a number of items. It has a fixed size.
 List is a collection that can grow when needed. It’s the most-used collection.
 Dictionary stores and accesses items using key/value pairs.
 HashSet stores unique items and offers set operations that can be used on them.
 A Queue is a first-in, first-out (FIFO) collection.
 A Stack is a first-in, last-out (FILO) collection.
 You can create a custom collection by inheriting from a collection class or inheriting
from one of the collection interfaces.