c# data matrix generator TRANSACTIONS in C#

Drawer Data Matrix in C# TRANSACTIONS

CHAPTER 12 TRANSACTIONS
Data Matrix Generation In Visual C#
Using Barcode encoder for VS .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
www.OnBarcode.com
Recognize ECC200 In C#
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
cmdInsertDB2.ExecuteNonQuery(); } } } Here you re not only spanning databases, but also if you want to dynamically compose the steps of the transaction, any method you called on the class would also automatically be enrolled. You could even call out to methods on other types flagged with TransactionOption as Required and their work would automatically be enlisted in the transaction. You can clearly see the power available in this model when there are requirements to compose transactions dynamically. (See 7 for more details on COM+ transaction composition.) The trade-off for this amount of flexibility is costly, though. Your type must inherit from the ServicedComponent base class. And regardless of how your transactions are composed, you ll always incur the overhead of invoking the DTC, even if you re updating a single row in a single table. This is a high price to pay, especially if most of your transactions are against a single data source and a distributed transaction is rare, as is normally the case. This is a real bummer, because it puts you in the situation where if you ever need to dynamically compose transactions, then you always have to use the DTC.
Print 1D Barcode In C#.NET
Using Barcode printer for VS .NET Control to generate, create Linear image in .NET applications.
www.OnBarcode.com
Printing Matrix Barcode In Visual C#
Using Barcode creator for Visual Studio .NET Control to generate, create Matrix 2D Barcode image in .NET framework applications.
www.OnBarcode.com
Transactions in 2.0
Print DataMatrix In Visual C#
Using Barcode generation for VS .NET Control to generate, create Data Matrix ECC200 image in .NET applications.
www.OnBarcode.com
Barcode Drawer In C#
Using Barcode creator for .NET framework Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
The transaction management system in version 2 of the .NET Framework sets out to address the problem of excessive overhead for dynamic composition of transactions by enlisting only the resource managers required for the type of transactional work being done. It also provides an infrastructure where you can roll in more volatile resources into the commit and rollback model of transactions. This means that if your transaction starts by modifying a hash table in memory, there is a resource manager that will manage that memory. If you commit the transaction, the changes will be committed to the hash table. If you roll it back, the hash table will revert to the state it had when the transaction started. In 1.x, the following code results in the loss of the entry from the hash table, even though the transaction is rolled back. (See Mover.cs in the App_Code directory of the Web12 project). [AutoComplete] public void Move2(object key) { object val = hashTable[key]; hashTable.Remove(key); using(SqlConnection cnnDB2 = new SqlConnection(Database2)) { // Insert value from hash table into DB SqlCommand cmdInsertDB2 = new SqlCommand("INSERT ...", cnnDB2); cnnDB2.Open(); cmdInsertDB2.ExecuteNonQuery(); } }
Painting Barcode In Visual C#
Using Barcode printer for .NET framework Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
Identcode Encoder In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create Identcode image in .NET framework applications.
www.OnBarcode.com
CHAPTER 12 TRANSACTIONS
DataMatrix Creation In Objective-C
Using Barcode maker for iPad Control to generate, create ECC200 image in iPad applications.
www.OnBarcode.com
Data Matrix ECC200 Drawer In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create ECC200 image in .NET framework applications.
www.OnBarcode.com
In 2.0, however, you can use a transacted hash table that would automatically participate in the transaction present. Furthermore, if on another path of code dynamically composing a different transaction, you start again by modifying the hash table but then modify a file from the hard drive, the transaction will automatically be promoted to enlist the file-based transaction manager. If your code continues and uses ADO.NET to modify a database table, the transaction is promoted again, to one that can handle the database transaction. Notice at this point in the scenario you have enlisted a transaction manager that is much more of an expensive resource than one that simply manages the memory consumed by a hash table. You have done so only on an as-needed basis, however. If your process continues and modifies a table from a different database, then and only then is the DTC enlisted to manage the distributed transaction. This is a far superior model to the one available in 1.x of the .NET Framework. You can dynamically compose your transactions, and the DTC will not be involved until you need for it to be. In fact, only the resource managers that need be involved will be, giving you a much better cost-to-feature ratio than was available in 1.x. The volatile management of memory and the file system is provided to you by the Lightweight Transaction Manager (LTM), which we look at next.
Barcode Printer In Objective-C
Using Barcode encoder for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
EAN 128 Encoder In Java
Using Barcode maker for Java Control to generate, create EAN 128 image in Java applications.
www.OnBarcode.com
Generate GTIN - 13 In None
Using Barcode generator for Online Control to generate, create EAN / UCC - 13 image in Online applications.
www.OnBarcode.com
Generate UCC-128 In Visual Studio .NET
Using Barcode drawer for Reporting Service Control to generate, create UCC.EAN - 128 image in Reporting Service applications.
www.OnBarcode.com
Printing Barcode In None
Using Barcode printer for Office Word Control to generate, create Barcode image in Office Word applications.
www.OnBarcode.com
EAN13 Creator In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create EAN 13 image in ASP.NET applications.
www.OnBarcode.com
Decoding Code 128 Code Set B In Visual C#.NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
ECC200 Printer In Java
Using Barcode encoder for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
www.OnBarcode.com
PDF-417 2d Barcode Generation In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create PDF-417 2d barcode image in .NET applications.
www.OnBarcode.com
Barcode Printer In Java
Using Barcode maker for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.