Distributed .NET Programming in VB .NET

By: Tom Barnaby

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Paperback | 24 September 2002

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544 Pages

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COM ON A WIRE, also known as DCOM, was a great boon to the distributed pro- grammer. Under the model ofDCOM, a client was able to interact with COM objects located literally anywhere, without requiring a change of code base. Using the indi- rection provided by AppiDs, stubs, proxies, and channels, our distributed endeavors involved little more than the use of declarative tools such as dcomcnfg.exe and the Component Services snap-in. However, all was not well in the world of DCOM (or COM for that matter). Although the clicking of check boxes made COM-based remoting appear quite simple on the surface, we suffered through numerous registry conflicts, a lifetime of passing interface pointers by reference, and the dreaded prospect of crossing firewalls. Just as ADO.NET has nothing to do with classic ADO, the .NET Remoting story has nothing to do with classic DCOM. The most obvious case in point is the fact that .NET assemblies are not registered with the system registry. Given this, we have no AppiD. Without an AppiD, we have no RemoteServerName value, which means no reference to oleaut32.dll and thus no more COM -based stub and proxies. In short, everything we knew about interacting with types across the wire has changed dramatically.

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Foreword	p. xv
About the Author	p. xvii
About the Technical Reviewer	p. xix
Acknowledgments	p. xxi
Introduction and AFAQ (Anticipated Frequently Asked Questions)	p. xxiii
Who Is This Book For?	p. xxiii
How Is This Book Different from Distributed .NET Programming in C#?	p. xxiv
What's Up with the ADO.NET Appendix by Andrew Troelsen?	p. xxiv
What Do I Need to Run the Examples?	p. xxiv
Why Isn't There Any Real-World Code?	p. xv
How Come You Don't Have Tables Listing All the Options/Methods/Parameters of Each Tool/Class/Method?	p. xv
Why Do I Keep Getting "File Not Found" Exceptions When I Run the Example Code?	p. xv
What's Up with the Spinal Tap Quotes?	p. xxvi
The Evolution of Distributed Programming	p. 1
Overview of Distributed Programming	p. 1
Layering an Application	p. 2
The Five Principles of Distributed Design	p. 3
Defining Scalability	p. 11
A Short History of Distributed Programming	p. 13
Centralized Computing	p. 13
Two-tier Client/Server Architecture	p. 14
Three-tier and N-tier Client/Server Architecture	p. 15
The Web Architecture	p. 17
Microsoft and Distributed Computing	p. 18
The Era of PC Dominance	p. 19
The Age of Enlightenment	p. 19
The Days of Disillusionment	p. 21
The Present: .NET	p. 23
Summary	p. 24
This Is .NET	p. 27
Understanding the .NET Infrastructure	p. 27
The Importance of Type	p. 28
The Three Cs of .NET: CTS, CLS, and CLR	p. 28
Using Namespaces	p. 30
Assemblies and Manifests	p. 32
Intermediate Language	p. 32
Building and Configuring .NET Assemblies	p. 33
Building a Private Assembly	p. 33
Building a Shared Assembly	p. 44
Understanding .NET Versioning	p. 54
Setting an Assembly's Version Information	p. 54
Revisiting the Application Configuration File	p. 57
Setting Machine-wide Version Policies	p. 58
Using the .NET Framework Configuration Tool	p. 58
Configuring Publisher Policy	p. 61
Policy Precedence	p. 64
Using the [left angle bracket]codeBase[right angle bracket] Element	p. 64
Viewing the Assembly Binding Log	p. 66
Summary of the Binding Process	p. 68
Understanding Attributes and Reflection	p. 68
Using CLR Attributes	p. 69
Implementing Custom Attributes	p. 71
Reflecting upon Reflection	p. 72
Attributes and Reflection in Perspective	p. 75
Understanding Garbage Collection	p. 75
Reference Counting vs. Garbage Collection	p. 76
Garbage Collection Internals	p. 78
Implementing the Finalize Method	p. 79
Implementing the IDisposable Interface	p. 81
Garbage Collection in Perspective	p. 84
Serialization	p. 84
Using the Serializable Attribute	p. 85
ISerializable and Formatters	p. 87
Summary	p. 89
Introduction to .NET Remoting	p. 91
What Is Remoting?	p. 91
Understanding Application Domains	p. 92
Programming with Application Domains	p. 93
Understanding Context	p. 95
Marshaling Objects	p. 105
Marshal By Value Objects	p. 105
Marshal By Reference Objects	p. 106
Shared Methods and Other Remoting Details	p. 107
Summarizing Marshaling and Context Agility	p. 108
Examining the .NET Remoting Framework	p. 109
Looking at the Big Picture	p. 109
Well-Known vs. Client-Activated Objects	p. 110
Understanding Proxies	p. 111
Understanding Channels and Formatters	p. 114
Summary	p. 117
Distributed Programming with .NET Remoting	p. 119
Implementing Well-Known Objects	p. 119
Building the Server	p. 119
Building the Client	p. 123
Singleton Mode vs. SingleCall Mode	p. 127
Looking (Briefly) at Some Remoting Issues	p. 130
Remoting Configuration	p. 130
Implementing Client-Activated Objects	p. 138
Building the Server	p. 140
Building the Client	p. 142
Understanding Lease-based Lifetimes	p. 144
Building Remoting Hosts	p. 159
Hosting Remotable Objects in a Windows Service	p. 159
Hosting Remotable Objects in ASP.NET	p. 167
Summary	p. 172
Additional Remoting Techniques	p. 175
Solving the Metadata Deployment Issue	p. 175
Deploying Metadata Assemblies	p. 176
Deploying Interface Assemblies	p. 186
Using the Soapsuds Utility	p. 193
Summary of Deployment Issues	p. 200
Calling Remote Objects Asynchronously	p. 201
Understanding Delegates	p. 201
Using Delegates for Local Asynchronous Calls	p. 206
Using Delegates for Remote Asynchronous Calls	p. 214
Summarizing Asynchronous Remoting	p. 227
Understanding Call Context	p. 228
Call Context vs. Thread Local Storage	p. 229
Using Call Context with Remoting	p. 230
Using Call Context with Asynchronous Calls	p. 233
Using Call Context Headers	p. 235
Summary	p. 236
Understanding XML Web Services	p. 237
Web Services Overview	p. 237
Why Web Services?	p. 238
Web Service Composition	p. 239
The World Wide Web Consortium	p. 247
Building and Consuming Web Services in .NET	p. 248
The IIS to ASP.NET to Web Service Relationship	p. 248
Using Code-Behind	p. 249
Building Web Services with Visual Studio .NET	p. 251
Consuming the Web Service	p. 255
Calling Web Services Asynchronously	p. 258
Returning Custom Types from the Web Service	p. 259
Using the ASP.NET Session Object	p. 268
Remoting vs. Web Services	p. 270
Summary	p. 271
Understanding COM Interop	p. 273
The Need for COM Interop	p. 273
Managed to Unmanaged Interop	p. 274
Understanding the Runtime Callable Wrapper	p. 274
Building an Interop Assembly	p. 275
Unmanaged to Managed Interop	p. 276
Understanding the COM Callable Wrapper	p. 277
Registering an Assembly for COM Interop	p. 278
Writing Managed Code for COM Interop	p. 279
Managed Code and COM Versioning	p. 285
Summary	p. 288
Leveraging Component Services	p. 289
Component Services Overview	p. 289
Component Services Motivation	p. 290
Revisiting Context	p. 290
Survey of Component Services	p. 291
Survey of COM+ Configuration Settings	p. 292
Building Serviced Components in Managed Code	p. 295
Populating the COM+ Catalog	p. 296
Experimenting with a Simple Serviced Component	p. 299
Examining COM+ and .NET Interaction	p. 317
Just-In-Time Activation	p. 319
Understanding Object Pooling	p. 329
Using Object Construction	p. 334
Automatic Transactions	p. 335
The Distributed Transaction Coordinator	p. 336
Enabling Transactions	p. 338
Determining the Transaction's Outcome	p. 339
Consuming Serviced Components	p. 346
Exposing Objects with DCOM	p. 346
Exposing Objects with .NET Remoting	p. 348
Investigating New Features in COM+ 1.5	p. 351
Application Recycling and Pooling	p. 351
Configurable Transaction Isolation Levels	p. 353
SOAP Services	p. 354
Summary	p. 355
.NET Message Queuing	p. 357
Message Queuing Overview	p. 357
Why Message Queuing?	p. 358
Message Queuing Architecture	p. 359
Message Queuing vs. Remoting vs. Web Services	p. 360
Installing and Administering MSMQ	p. 360
MSMQ Installation Options	p. 360
Creating and Managing Queues	p. 363
Using .NET Message Queuing	p. 365
Building the Sender	p. 365
Building the Receiver	p. 370
Sending Custom Types in Messages	p. 376
Writing Queued Components in Managed Code	p. 384
The Queued Component Architecture	p. 385
Implementing a Queued Component	p. 387
Handling Queued Component Exceptions	p. 388
Summary	p. 391
Data Access with ADO.NET	p. 395
The Need for ADO.NET	p. 395
ADO.NET: The Big Picture	p. 396
Understanding ADO.NET Namespaces	p. 398
The Types of System.Data	p. 399
Examining the DataColumn Type	p. 400
Building a DataColumn	p. 402
Adding a DataColumn to a DataTable	p. 403
Configuring a DataColumn to Function As a Primary Key	p. 404
Enabling Auto-Incrementing Fields	p. 404
Configuring a Column's XML Representation	p. 406
Examining the DataRow Type	p. 407
Understanding the DataRow.RowState Property	p. 408
The ItemArray Property	p. 410
Details of the DataTable	p. 412
Building a Complete DataTable	p. 413
Manipulating a DataTable: Deleting Rows	p. 416
Manipulating a DataTable: Applying Filters and Sort Orders	p. 418
Manipulating a DataTable: Updating Rows	p. 421
Understanding the DataView Type	p. 424
Understanding the Role of the DataSet	p. 426
Members of the DataSet	p. 428
Building an In-Memory DataSet	p. 430
Expressing Relations Using the DataRelation Type	p. 433
Navigating Between Related Tables	p. 434
Reading and Writing XML-Based DataSets	p. 438
Building a Simple Test Database	p. 441
ADO.NET Managed Providers	p. 442
Working with the OleDb Managed Provider	p. 443
Establishing a Connection Using the OleDbConnection Type	p. 444
Building a SQL Command	p. 446
Working with the OleDbDataReader	p. 447
Connecting to an Access Database	p. 448
Executing a Stored Procedure	p. 449
The Role of the OleDbDataAdapter Type	p. 452
Filling a DataSet Using the OleDbDataAdapter Type	p. 454
Working with the SQL Managed Provider	p. 456
The System.Data.SqlTypes Namespace	p. 457
Inserting New Records Using the SqlDataAdapter	p. 458
Updating Existing Records Using the SqlDataAdapter	p. 461
Autogenerated SQL Commands	p. 463
Filling a Multitabled DataSet (and Adding DataRelations)	p. 465
Bring in the Wizards!	p. 469
Establishing a Data Connection	p. 469
Creating a SQL Connection at Design Time	p. 471
Building a Data Adapter	p. 473
Using the Configured Data Adapter	p. 477
Summary	p. 478
Index	p. 481
Table of Contents provided by Syndetics. All Rights Reserved.

Distributed .NET Programming in VB .NET

At a Glance

Paperback

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You Can Find This Book In

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