C# 2010 All-in-One For Dummies in C#

Create Code 39 in C# C# 2010 All-in-One For Dummies

Looking at a Program That CAN_BE_USED_AS an Example 340 Creating your own interface at home in your spare time 340 Implementing the incomparable IComparable<T> interface 341 Putting it all together 343 Getting back to the Main( ) event 346 Unifying Class Hierarchies 346 Hiding Behind an Interface 348 Inheriting an Interface 351 Using Interfaces to Manage Change in Object-Oriented Programs 352 Making flexible dependencies through interfaces 353 Abstract or concrete: When to use an abstract class and when to use an interface 353 Doing HAS_A with interfaces 354

ET, Phone Home The Callback Problem 357 Defining a Delegate 358 Pass Me the Code, Please Examples 360 I delegated the example to Igor 360 First, a simple example 361 A More Real-World Example 362 Getting an overview of the bigger example 363 Putting the app together 363 Looking at the code 365 Tracking the delegate life cycle 366 Shh! Keep It Quiet Anonymous Methods 368 Stuff Happens C# Events 369 The Observer design pattern 369 What s an event Publish/Subscribe 370 How a publisher advertises its events 370 How subscribers subscribe to an event 371 How to publish an event 372 How to pass extra information to an event handler 372 A recommended way to raise your events 373 How observers handle an event 374

Dividing a Single Program into Multiple Source Files 378 Dividing a Single Program into Multiple Assemblies 379 Executable or library 379 Assemblies 380 Executables 381 Class libraries 381 Putting Your Classes into Class Libraries 382 Creating the projects for a class library 382 Creating a stand-alone class library 382 Adding a second project to an existing solution 383

Creating classes for the library 384 Using a driver program to test a library 385 Using a class library from a program 386 Going Beyond Public and Private: More Access Keywords 387 Internal: Eyes only at the CIA 387 Protected: Sharing with subclasses 390 Protected internal: Being a more generous protector 392 Putting Classes into Namespaces 392 Declaring a namespace 394 Relating namespaces to the access keyword story 395 Using fully qualified names 397

Book III: Designing for C# 399

Designing Secure Software 402 Determining what to protect 402 Documenting the components of the program 402 Decomposing components into functions 403 Identifying potential threats in functions 403 Rating the risk 404 Building Secure Windows Applications 404 Authentication using Windows login 404 Encrypting information 407 Deployment security 407 Building Secure Web Forms Applications 408 SQL Injection attacks 409 Script exploits 410 Best practices for securing Web Forms applications 411 Using SystemSecurity 412

Getting to Know SystemData 416 How the Data Classes Fit into the Framework 417 Getting to Your Data 418 Using the SystemData Namespace 418 Setting up a sample database schema 419 Connecting to a data source 420 Working with the visual tools 425 Writing data code 428 Using the Entity Framework 431

StreamWriting for Old Walter 438 Using the stream: An example 439 Revving up a new outboard StreamWriter 441 Finally, we re writing! 442 Using some better fishing gear: The using statement 445 Pulling Them Out of the Stream: Using StreamReader 448 More Readers and Writers 452 Exploring More Streams than Lewis and Clark 453

Getting to Know SystemNet 456 How Net Classes Fit into the Framework 457 Using the SystemNet Namespace 458 Checking the network status 459 Downloading a file from the Internet 460 E-mailing a status report 462 Logging network activity 465

Getting to Know SystemDrawing 469 Graphics 470 Pens 470 Brushes 471 Text 471 How the Drawing Classes Fit into the Framework 472 Using the SystemDrawing Namespace 473 Getting started 473 Setting up the project 475 Drawing the board 476