Apress pro LINQ Language Integrated Query in C# 2008 phần 2 ppsx

Apress pro LINQ Language Integrated Query in C# 2008 phần 2 ppsx

Apress pro LINQ Language Integrated Query in C# 2008 phần 2 ppsx

... 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 ... name); } Listing 2- 18 is the equivalent query using the query expression syntax: Rattz_789-3C 02. fm Page 37 Tuesday, October 16, 20 07 2: 19 PM 44 CHAPTER 2 ■ C# 3.0 LANGUAG...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 10 ppsx

Apress pro LINQ Language Integrated Query in C# 2008 phần 10 ppsx

... 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...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 1 docx

Apress pro LINQ Language Integrated Query in C# 2008 phần 1 docx

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

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

... example: 2 2 2 2 2 2 2 2 2 2 Rattz_789-3.book Page 129 Tuesday, October 16, 20 07 2: 21 PM 1 52 CHAPTER 5 ■ NONDEFERRED OPERATORS Exceptions ArgumentNullException is thrown if any arguments are null. InvalidOperationException ... example. Reprinted Here for Convenience Is Listing 1-3 using System; using System .Linq; using System.Data .Linq; using nwind; Northwind db = new Nor...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 4 ppt

Apress pro LINQ Language Integrated Query in C# 2008 phần 4 ppt

... 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, ... element at index 3 is retrieved. Now I will try a query with an invalid index using the code in Listing 5-36. Listing 5-36. Calling the ElementAtOrDefault Operator with an Inv...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 5 ppt

Apress pro LINQ Language Integrated Query in C# 2008 phần 5 ppt

... Tuesday, October 23 , 20 07 4:37 PM 25 2 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 Pro...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 6 ppt

Apress pro LINQ Language Integrated Query in C# 2008 phần 6 ppt

... Mary Doe 10 02 Motorcycle $1 ,20 0.00 1999-01 -25 Dee Linquent 1007 Racing Bicycle $175.00 1999- 02- 08 Jack Sprat 1007 Racing Bicycle $20 0.00 1999- 02- 12 Roger Smith 1007 Racing Bicycle $22 5.00 OK, come ... $55.00 1999- 02- 14 Tom Jones 10 02 Motorcycle $400.00 1999- 02- 16 Mary Doe 10 02 Motorcycle $600.00 1999- 02- 17 Dee Linquent 10 02 Motorcycle $800.00 1999- 02- 25 Roger Smith 1...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 7 pptx

Apress pro LINQ Language Integrated Query in C# 2008 phần 7 pptx

... 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 ... 329 Tuesday, October 16, 20 07 2: 21 PM CHAPTER 10 ■ LINQ TO DATASET OPERATORS 347 dataRow.Field<int>(0), dataRow.Field<string>(1)); } except = seq1.Except(seq2); Cons...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 8 pps

Apress pro LINQ Language Integrated Query in C# 2008 phần 8 pps

... with this option. In Visual Studio 20 08 Beta 2, the valid choices are Sql2000Provider, Sql2005Provider, and SqlProvider. All of these provider classes are in the System.Data .Linq. SqlClient namespace ... SQL, thrown in to boot. ■Tip LINQ to SQL is an entry-level ORM tool that permits powerful SQL queries. In addition to providing LINQ query capabilities, as long as your...
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Apress pro LINQ Language Integrated Query in C# 2008 phần 9 ppt

Apress pro LINQ Language Integrated Query in C# 2008 phần 9 ppt

... the appropriate Table<T>. Listing 14 -22 contains an example of removing the relationship. Listing 14 -22 . Removing a Relationship Between Two Entity Objects Northwind db = new Northwind(@"Data ... 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 Que...
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