... DataContext.
Listing 14-1 contains an example of inserting a record into the database.
Listing 14-1. Inserting a Record by Inserting an Entity Object into Table<T>
// 1. Create the DataContext.
Northwind ... method.
db.SubmitChanges();
Rattz_ 789 -3C14.fm Page 416 Tuesday, October 16, 2007 1:27 PM
388
CHAPTER 12
■ LINQ TO SQL INTRODUCTION
Using the LINQ to SQL API
In order to u...
... into the entity classes at key
points in time.
Finally, query expressions provide that warm fuzzy feeling when first seeing a LINQ query that
makes you want to get on board with LINQ. Nothing ... next.
Listing 3-4. An Example Demonstrating the Query Results Changing Between Enumerations
// Create an array of ints.
int[] intArray = new int[] { 1,2,3 };
IEnumerable<int> ints...
... mapping file to perform
a LINQ to SQL query without using any attributes.
Listing 16-9. The Third DataContext Constructor Prototype Connecting to a Database and Using a
Mapping File
string ... Source=.\SQLEXPRESS;Initial Catalog=Northwind ;Integrated Security=SSPI;",
nwindMap);
IQueryable<Linqdev.Customer> query =
from cust in db.GetTable<Linqdev.Customer>()
wh...
... Service-Oriented
Architecture, 3e
Beginning ASP.NET 3.5
Data Access, 2e
Beginning
C# 20 08 Databases
Beginning C# 20 08
Pro LINQ: Language
Integrated Query
in C# 20 08
www .apress. com
SOURCE CODE ONLINE
Companion eBook
... ROADMAP
Silverlight and .NET 3.5
Recipes in C# 20 08
Pro C# 20 08 and the
.NET 3.5 Platform
Pro WPF in C# 20 08, 2e
Illust...
... example.
Reprinted Here for Convenience Is Listing 1-3
using System;
using System .Linq;
using System.Data .Linq;
using nwind;
Northwind db = new Northwind(@"Data Source=.\SQLEXPRESS;Initial Catalog=Northwind");
var ... number 2.
Listing 4- 48. Returning a Sequence of Ten Integers All With the Value Two
IEnumerable<int> ints = Enumerable.Repeat(2, 10);
foreach(int i in int...
... understanding of LINQ to Objects and just what LINQ can
do for you, it’s time to learn about using LINQ to query and generate XML. This functionality is called
LINQ to XML and, not so coincidentally, ... the same prototype but, this time, with elements in the input sequence, as shown
in Listing 5- 38.
Listing 5- 38. First Any Prototype Where Elements Are in the Source Input...
... THE LINQ TO XML API
XProcessingInstruction.Target on XProcessingInstruction Objects and
XProcessingInstruction.Data on XProcessingInstruction Objects
To update the value of a processing instruction, ... PM
CHAPTER 7 ■ THE LINQ TO XML API
251
<BookParticipants>
<BookParticipant type="Author">
<! Author of Pro LINQ: Language Integrated Query in C# 2...
... XElement("Book", " ;Pro LINQ: Language Integrated Query in C# 20 08& quot;)),
new XElement("BookParticipant",
new XElement("Name", "John Q. Public"))};
Rattz_ 789 -3.book Page ... make it interesting, I will query on the type attribute, and I will try
this one in query expression syntax, as shown in Listing 9-3.
Listing 9-3...
... do?
The LINQ to DataSet operators allow a developer to perform LINQ queries on a DataSet, and
since a DataSet can be obtained using normal ADO.NET SQL queries, LINQ to DataSet allows LINQ
queries ...
query on data in a database using ADO.NET to obtain a DataSet, then turn right around and query
that data again using LINQ to DataSet, all within several lines of code. In re...
... to the query for the respective column. Listing 14-16 contains an example programmati-
cally building a query for such an interface.
Listing 14-16. Programmatically Building a Query
Northwind db ... discriminator, which is defined as the entity class property whose IsDiscriminator attribute
property is set to true.
For an example, let’s examine an InheritanceMapping attribute:
An Inher...