Apress pro LINQ Language Integrated Query in C# 2008 phần 3 pdf

... 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 ... Equals(string x, string y) { return(Int32.Parse(x) == Int32.Parse(y)); } public int GetHashCode(string obj) { return Int32.Parse(obj).ToString().GetHashCod...

Ngày tải lên: 06/08/2014, 08:22

... Service-Oriented Architecture, 3e Beginning ASP.NET 3. 5 Data Access, 2e Beginning C# 2008 Databases Beginning C# 2008 Pro LINQ: Language Integrated Query in C# 2008 www .apress. com SOURCE CODE ONLINE Companion ... ROADMAP Silverlight and .NET 3. 5 Recipes in C# 2008 Pro C# 2008 and the .NET 3. 5 Platform Pro WPF in C# 2008, 2e Illustrated C# 2...

Ngày tải lên: 06/08/2014, 08:22

... 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> i...

Ngày tải lên: 06/08/2014, 08:22

... 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...

Ngày tải lên: 06/08/2014, 08:22

... Tuesday, October 23, 2007 4 :37 PM 252 CHAPTER 7 ■ THE LINQ TO XML API XProcessingInstruction.Target on XProcessingInstruction Objects and XProcessingInstruction.Data on XProcessingInstruction Objects To ... value of a processing instruction, simply modify the Target and Data properties of the XProcessingInstruction object. Listing 7-72 is an example. Listing 7-72. Updating a Processing...

Ngày tải lên: 06/08/2014, 08:22

... 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. Obtaining Restricted Elements Without Reaching ... " ;Pro LINQ: Language Integrated Query in C# 2008& quot;)), new XElement("BookParticipant", new XElement("Name", "John Q. Public"))}; R...

Ngày tải lên: 06/08/2014, 08:22

... same value, as shown in Listing 10-7. Listing 10-7. Comparing 3 to 3 Console.WriteLine(" (3 == 3) is {0}.", (3 == 3) ); The following is the result of this code: (3 == 3) is True. There ... 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...

Ngày tải lên: 06/08/2014, 08:22

... ready to insert Customer records using the InsertCustomer stored procedure. In Listing 13- 3, I will create a new customer using the InsertCustomer stored procedure. Listing 13- 3. Creating a Customer ... 2007 1:27 PM 38 8 CHAPTER 12 ■ LINQ TO SQL INTRODUCTION Using the LINQ to SQL API In order to use the LINQ to SQL API, you will need to add the System.Data .Linq. dll assembly...

Ngày tải lên: 06/08/2014, 08:22

... 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 ... let’s examine an InheritanceMapping attribute: An InheritanceMapping Attribute [InheritanceMapping(Code = "G", Type = typeof(Shape), IsDefault = true)] The preceding InheritanceMap...

Ngày tải lên: 06/08/2014, 08:22

... 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...

Ngày tải lên: 06/08/2014, 08:22