c# data matrix generator Configuration and the Database Object in C#

Generating Data Matrix 2d barcode in C# Configuration and the Database Object

Configuration and the Database Object
Making DataMatrix In C#.NET
Using Barcode encoder for VS .NET Control to generate, create Data Matrix ECC200 image in VS .NET applications.
www.OnBarcode.com
Reading Data Matrix 2d Barcode In C#.NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
You use configuration files to name and provide connection information to the databases to be used from within the block. Within a configuration file you can name any number of logical databases, choose a database vendor for each, and establish connection strings. There s a configuration tool that ships with the Enterprise Library that will generate the appropriate entries for your application s configuration file. It s called Enterprise Library Configuration. The setup goes like this. You have any number of database types. The block supports SQL Server, Oracle, and DB2 by default. Within each type, you have a number of instances. These are specific databases you want to connect to of a specific type. This is the level of configuration where you establish a logical name of the database, which is all you need to use from your code to work with it. An instance is then associated with a named connection string. The connection entry in the configuration file has all of the named/value pairs that will be used to build the connection string at runtime. Here you set the configuration for working with the pubs database from SQL Server. The name you ll use from code is PubsDatabase. The leaf nodes under the connection string contain all of the named values (see Figure 11-9).
QR Code ISO/IEC18004 Printer In C#
Using Barcode creator for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
www.OnBarcode.com
Barcode Generator In Visual C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
CHAPTER 11 DATA ACCESS LAYER SERVICES
Printing EAN / UCC - 13 In C#
Using Barcode maker for .NET Control to generate, create GS1-128 image in .NET applications.
www.OnBarcode.com
Paint Linear Barcode In C#.NET
Using Barcode encoder for VS .NET Control to generate, create 1D image in Visual Studio .NET applications.
www.OnBarcode.com
Figure 11-9. The database node of the Enterprise Library configuration Although Oracle is set up here, you re not using it. The application block supports DB2 databases by default, but this option isn t compiled and built into the block s assemblies when you first install the Enterprise Library. The support for DB2 is dependent upon IBM s Managed Provider for DB2, so you must first install that, and then compile the DB2 project included with the application block s source code. The configuration tool will still support DB2 databases, even though they are not present in the tool by default. The Type Selector dialog box sports a Load an Assembly button. This dialog enables you to browse out to the assemblies created with the DB2 project, or to your own implementation of a Managed Provider for the block (see Figure 11-10). The tool does not care, just so the assembly chosen has a type that inherits from EnterpriseLibrary.Data.Database in it.
Encoding UPC A In C#.NET
Using Barcode encoder for VS .NET Control to generate, create GS1 - 12 image in VS .NET applications.
www.OnBarcode.com
Identcode Generator In Visual C#.NET
Using Barcode maker for .NET Control to generate, create Identcode image in .NET framework applications.
www.OnBarcode.com
Figure 11-10. The Type Selector dialog box
Data Matrix Maker In Java
Using Barcode creation for BIRT Control to generate, create Data Matrix image in BIRT applications.
www.OnBarcode.com
Data Matrix ECC200 Drawer In None
Using Barcode generation for Office Word Control to generate, create Data Matrix image in Word applications.
www.OnBarcode.com
CHAPTER 11 DATA ACCESS LAYER SERVICES
Making Universal Product Code Version A In Java
Using Barcode generation for Android Control to generate, create GS1 - 12 image in Android applications.
www.OnBarcode.com
Draw PDF417 In Visual Basic .NET
Using Barcode maker for .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
When the configuration is saved, the tool writes out two files. One contains the elements that will be used from your application configuration file. It s basically just a verbose pointer to a file named dataConfiguration.config. This is the file that will be read by the block at runtime. Here s the (slightly abbreviated) configuration file that will be used by the block: < xml version="1.0" encoding="utf-8" > <dataConfiguration> <xmlSerializerSection type="..."> <enterpriseLibrary.databaseSettings defaultInstance="PubsDatabase" ...> <databaseTypes> <databaseType name="Oracle" type="..." /> <databaseType name="Sql Server" type="..." /> </databaseTypes> <instances> <instance name="PubsDatabase" type="Sql Server" connectionString="pubs" /> </instances> <connectionStrings> <connectionString name="pubs"> <parameters> <parameter name="database" value="pubs" isSensitive="false" /> <parameter name="Integrated Security" value="false" isSensitive="false" /> <parameter name="pwd" value="123123" isSensitive="true" /> <parameter name="uid" value="sa" isSensitive="false" /> <parameter name="server" value="localhost" isSensitive="false" /> </parameters> </connectionString> <connectionString name="Sql Connection String"> <parameters> <parameter name="database" value="database" isSensitive="false" /> <parameter name="Integrated Security" value="True" isSensitive="false" /> <parameter name="server" value="server" isSensitive="false" /> </parameters> </connectionString> </connectionStrings> </enterpriseLibrary.databaseSettings> </xmlSerializerSection> </dataConfiguration>
Recognize Code39 In VB.NET
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
GS1 - 12 Creation In None
Using Barcode maker for Font Control to generate, create UPC-A image in Font applications.
www.OnBarcode.com
CHAPTER 11 DATA ACCESS LAYER SERVICES
Encoding GTIN - 13 In None
Using Barcode printer for Office Word Control to generate, create UPC - 13 image in Word applications.
www.OnBarcode.com
UPC Code Recognizer In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
The ellipses all indicate omission of a full assembly name or a namespace. The important bits are retained. You can see from this configuration that a database named PubsDatabase is now mapped to a connection string to that database. You can create an instance of a database object that represents this connection with a single line of code. Database db = DatabaseFactory.CreateDatabase("PubsDatabase"); Also, because the PubsDatabase is set as the default instance, you can simply create it with: Database db = DatabaseFactory.CreateDatabase(); Naming the instance is only necessary when you re using more than one database from an application. You can still use a default in that case, but you ll be better off naming all instances explicitly to clarify the code and ease maintenance. Now that you have an instance to a Database object, the rest of the work is done with its instance methods. All of the code that follows requires a reference to the assembly named Microsoft.Practices.EnterpriseLibrary.Data.dll and the following using statement. using Microsoft.Practices.EnterpriseLibrary.Data;
PDF 417 Recognizer In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Code 128 Code Set B Creation In Java
Using Barcode creation for Java Control to generate, create Code 128 Code Set A image in Java applications.
www.OnBarcode.com
Generate GS1 - 12 In Java
Using Barcode creator for BIRT Control to generate, create UPC-A Supplement 2 image in Eclipse BIRT applications.
www.OnBarcode.com
Drawing Code 128A In None
Using Barcode maker for Word Control to generate, create Code 128C image in Office Word applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.