C#: A Beginner's Guide (Beginners Guides)

C#: A Beginner's Guide (Beginners Guides)

Pat McGee

Language: English

Pages: 496

ISBN: 0071835830

Format: PDF / Kindle (mobi) / ePub

C#: A Beginner's Guide (Beginners Guides)

Pat McGee

Language: English

Pages: 496

ISBN: 0071835830

Format: PDF / Kindle (mobi) / ePub


Essential Skills--Made Easy!

C#: A Beginner's Guide offers a step-by-step approach to learning object-oriented programming with C# and the .NET Framework while preparing you for data driven-development. More than 150 easy-to-follow examples are included. The book covers Visual Studio for development and debugging, collections and advanced C# structures, LINQ and traditional database development, as well as file, XML, and JSON handling. By the end of the book, you'll have the foundation you need to begin developing advanced data-driven applications in any C#-based platform.

Designed for Easy Learning

  • Key Skills & Concepts--Chapter-opening lists of specific skills covered in the chapter
  • Try This--Hands-on exercises that show you how to apply your skills
  • Notes--Extra information related to the topic being covered
  • Tips--Helpful reminders or alternate ways of doing things
  • Cautions--Errors and pitfalls to avoid
  • Self Test--End-of-chapter quizzes to reinforce your skills
  • Example code with commentary that describes the programming techniques being illustrated

Ready-to-use code at www.mhprofessional.com

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conditional expression. Conditional operators are sometimes called ternary operators. The ternary operator offers a shorthand alternative to writing an if-else block. To implement the conditional operator, place a question mark, ?, before the assignment value used when a conditional expression is true. This assignment statement is followed by a colon, :, along with the assignment value to be used when the conditional expression is false. In the following case, message is assigned the value “Wind

Read Queries Referencing Properties of an Object Assigning Custom Property Names Try This 15-1: Reading Data with Query Syntax Lazy Loading vs. Immediate Data Loading Filtering Reading One Object Only Sorting Subselection Try This 15-2: Inspecting Combined Queries Merging Similar Queries with a Union Aggregate Summary Queries Adding Objects Updating Objects Deleting Objects Chapter 15 Self Test 16 LINQ to Entities: Method-Based Syntax Lambda Syntax Read Queries Filtering Try

called Age that is publicly accessible to return the total years passed since a person’s birth. You may calculate age with code similar to the following: // Generates yyyy.mmdd string now = DateTime.Now.ToString(“yyyy.MMdd”); // Generates 1511.0618 for Bartolomeo Ammannati string dob = person.Birthday.ToString(“yyyy.MMdd”); // Calculate age. For example; // (int)(2013.1009 – 2012.0618) = 1 // (int)(2013.1009 – 2012.1118) = 0 int age = (int)(Convert.ToSingle(now) - Convert.ToSingle(dob));

nested between the opening and closing tags. An element can also have zero to many properties called attributes. Attributes of an element are located either inside an opening tag or within a self-contained element tag. Attribute values are contained within quotes. To help clarify where these pieces fit, Figure 20-1 shows three different ways that elements can be written to store name, population, and capital data of a U.S. state. Figure 20-1 XML element and attribute syntax Element

XAttribute class, 383 XElement class, 382–383 XML adding an XML document to a Visual Studio project, 380 adding elements to existing documents, 390–391 attributes, 379, 380 creating an XML file (example code), 378–379 creating elements and attributes, 389–390 customizing serialization, 396–397 deleting elements, 393 deserialization, 397–399 element hierarchy, 379–380 elements, 379, 380 introduction to, 378 serialization, 394–397 syntax, 381 updating elements and attributes,

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