create 2d barcode c# Using the TransactionScope Activity in Visual C#.NET

Make GS1 - 12 in Visual C#.NET Using the TransactionScope Activity

Using the TransactionScope Activity
Encoding UPCA In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create UPC Code image in .NET framework applications.
www.OnBarcode.com
Scan UPC-A Supplement 2 In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
XA-style transactions in WF are implemented by the TransactionScope activity. This activity is closely aligned with the .NET System.Transactions namespace, and in fact it initiates a Transaction as the ambient transaction when the activity begins execution. The TransactionScope activity even shares data structures (TransactionOptions) with System.Transactions. Using the composite activity-based TransactionScope is truly as easy as dropping it into your workflow. Any activity you place inside the TransactionScope activity automatically inherits the ambient transaction and operates as typical transactions do when using .NET s own System.Transactions. Note
Making Bar Code In Visual C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create bar code image in .NET applications.
www.OnBarcode.com
Barcode Scanner In C#.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
You cannot place a TransactionScope activity within another transactional activity. Nesting of transactions is not permitted. (This rule holds true for CompensatableTransactionScope as well.)
UPC Symbol Printer In .NET
Using Barcode generation for ASP.NET Control to generate, create Universal Product Code version A image in ASP.NET applications.
www.OnBarcode.com
UPC A Encoder In .NET
Using Barcode creator for VS .NET Control to generate, create GS1 - 12 image in .NET applications.
www.OnBarcode.com
Transactional options dictate more precisely how the ambient transaction will operate. These options, supported by the System.Transactions.TransactionOptions structure, allow you to set the isolation level and timeout that the ambient transaction will support. The timeout value is self-explanatory, but the isolation level might not be.
GS1 - 12 Drawer In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create GTIN - 12 image in VS .NET applications.
www.OnBarcode.com
Making UPC Code In C#
Using Barcode encoder for .NET framework Control to generate, create UCC - 12 image in .NET framework applications.
www.OnBarcode.com
The timeout values have limits, which are configurable. There is a machine-wide setting, System.Transactions.Configuration.MachineSettingsSection.MaxTimeout, and a local one, System.Transactions.Configuration.DefaultSettings.Timeout, which set the ceilings on the maximum value to allow for a timeout. These values override anything you set using TransactionOptions.
Bar Code Printer In C#.NET
Using Barcode maker for .NET Control to generate, create barcode image in .NET applications.
www.OnBarcode.com
Bar Code Maker In C#.NET
Using Barcode encoder for .NET framework Control to generate, create bar code image in VS .NET applications.
www.OnBarcode.com
Note
Print Code 128 Code Set B In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Code 128B image in Visual Studio .NET applications.
www.OnBarcode.com
4-State Customer Barcode Drawer In C#.NET
Using Barcode maker for VS .NET Control to generate, create OneCode image in .NET framework applications.
www.OnBarcode.com
15
GS1 - 12 Recognizer In .NET Framework
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Drawing Code 3/9 In None
Using Barcode printer for Online Control to generate, create Code 39 Extended image in Online applications.
www.OnBarcode.com
Workflows and Transactions
Making Barcode In Java
Using Barcode generation for Android Control to generate, create barcode image in Android applications.
www.OnBarcode.com
QR Code Creation In VS .NET
Using Barcode drawer for .NET Control to generate, create QR image in VS .NET applications.
www.OnBarcode.com
A transaction s isolation level defines to a large extent what the transaction can do with data to be transacted. For example, maybe you want your transaction to be able to read uncommitted data (to preclude being locked out by a previous transactional database page lock). Or the data you are writing might be critical, and therefore you allow the transaction to read only committed data, and moreover, you disallow other transactions to work with the data while your transaction is executing. The isolation levels you can select are shown in Table 15-1. You set both the isolation level and timeout using the TransactionOptions property of the TransactionScope activity.
Recognizing GTIN - 12 In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Encode UCC - 12 In .NET Framework
Using Barcode drawer for Visual Studio .NET Control to generate, create UPCA image in VS .NET applications.
www.OnBarcode.com
Table 15-1 Transactional Isolation Levels Isolation Level Chaos ReadCommitted ReadUncommitted Meaning Uncommitted and pending changes from transactions using higher isolated level cannot be overwritten. Uncommitted data cannot be read during the transaction, but it can be modified. Uncommitted data can be both read and modified during the transaction. However, keep in mind that the data may change there is no guarantee that the data will be the same on subsequent reads. Uncommitted data can be read but not modified during the transaction. However, new data can be inserted. Uncommitted data can be read but not modified, and no new data can be inserted during the transaction. Uncommitted data can be read. But prior to the transaction actually modifying the data, the transaction verifies that another transaction has not changed the data after it was initially read. If the data has been changed, the transaction raises an error. The purpose of this is to allow a transaction to read the previously committed data value. A different isolation level from the one specified is being used, but the level cannot be determined for some reason. If you try to set the transactional isolation level to this value, an exception is thrown. Only the transactional system can set this value.
Creating UPC-A Supplement 2 In VB.NET
Using Barcode printer for VS .NET Control to generate, create GTIN - 12 image in .NET framework applications.
www.OnBarcode.com
Draw Code39 In Java
Using Barcode generator for Java Control to generate, create Code 39 Extended image in Java applications.
www.OnBarcode.com
RepeatableRead Serializable Snapshot
Unspecified
When you drop an instance of the TransactionScope activity into your workflow, the isolation level is automatically set to Serializable. Feel free to change this as your architecture dictates. Serializable is the strictest isolation level, but it also limits scalability to some degree. It s not uncommon to select ReadCommitted as the isolation level for systems that require a bit more throughput, but this is a decision only your system can dictate based on your individual requirements.
Committing Transactions
If you re used to working with SQL Server transactions, or perhaps COM+ transactions, you know that once the data has been inserted, updated, or deleted you must commit the
Copyright © OnBarcode.com . All rights reserved.