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The Csla.Validation namespace contains types that assist the business developer in implementing and enforcing business rules. The Csla.Core.BusinessBase class, discussed earlier in the BusinessBase Class section, illustrated how some of the functionality in the Csla.Validation namespace will be used. This includes managing a list of business rules for each of the object s properties and for maintaining a list of currently broken business rules. Obviously, the framework can t implement the actual business rules and validation code that will vary from application to application. However, business rules follow a very specific pattern in that they are either broken or not. The result of a rule being checked is a Boolean value and a humanreadable description of why the rule is broken. This makes it possible to check the rules and then maintain a list of broken rules including human-readable descriptions of each rule. vb.net code 39 reader VB . NET Image: Example to Read Code 39 Barcode with VB . NET Codes in ...
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Free to download .NET, C#, VB . NET barcode reader app for Code 39 ; C# Code 39 recognition SDK; VB . NET Code 39 recognition SDK. In this section, we ll look at an example that illustrates Oracle update batching. The DemoOracleUpdateBatching class begins with the import statements and the main() method declaration. Within the main() method, we obtain the connection as usual: /* This program illustrates use of Oracle update batching. * COMPATIBLITY NOTE: runs successfully against 10.1.0.2.0. and 9.2.0.1.0. */ import java.sql.SQLException; import java.sql.Statement; // for accessing constants only import oracle.jdbc.OraclePreparedStatement; import oracle.jdbc.OracleConnection; import book.util.JDBCUtil; import book.util.Util; class DemoOracleUpdateBatching { public static void main(String args[]) { Util.checkProgramUsage( args ); OracleConnection oconn = null; OraclePreparedStatement opstmt = null; try { // get connection, set it to autocommit within JDBCUtil.getConnection() oconn = (OracleConnection)JDBCUtil.getConnection( "benchmark", "benchmark", args[0]); We prepare an insert statement, casting the returned object to the OraclePreparedStatement interface: // prepare a statement to insert data opstmt = (OraclePreparedStatement) oconn.prepareStatement( "insert into t1( x ) values ( )"); We set the batch size to 3 at the statement level: opstmt.setExecuteBatch( 3 ); birt gs1 128, police word ean 128, word schriftart ean 13, free barcode font 128 download word, data matrix code in word erstellen, word pdf 417 vb.net code 39 reader read code 39 barcode with vb . net - Stack Overflow
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NET Code 39 barcode Reader Control is an advanced developer-library for . NET class ... NET Code 39 barcode scanner can read barcode images using VB . Given that rules follow a specific pattern, it is possible to define a method signature that covers virtually all business rules. In .NET, a method signature can be formally defined using a delegate; here s the definition for a rule method: public delegate bool RuleHandler(object target, RuleArgs e); Every rule is implemented as a method that returns a Boolean result: true if the rule is satisfied, false if the rule is broken. The object containing the data to be validated is passed as the first argument, and the second argument is a RuleArgs object that can be used to pass extra rule-specific information. This means that a business rule in a business class looks like this: SQL statement; otherwise the table is dropped and re-created. If an alter table can t handle the existing differences, Axapta will perform a more-complex operation that creates a new table and copies existing data to it. vb.net code 39 reader C# . NET Code 39 Barcode Reader Control | Free C# Code to Scan ...
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NET Code 39 Barcode Reader , Reading Code - 39 barcode images in .NET, C#, VB . NET , ASP.NET applications. We then insert three rows, printing out the number of rows returned each time. Since the batch size is 3, Oracle queues up the batches and executes them all together with the third insert. // first insert opstmt.setInt(1, 1 ); // following insert is queued for execution by JDBC int numOfRowsInserted = opstmt.executeUpdate(); System.out.println("num of rows inserted: " + numOfRowsInserted ); // second insert opstmt.setInt(1, 2 ); // following insert is queued for execution by JDBC numOfRowsInserted = opstmt.executeUpdate(); System.out.println("num of rows inserted: " + numOfRowsInserted ); // third insert opstmt.setInt(1, 3 ); // since batch size is 3, the following insert will result // in JDBC sending all three inserts queued so far (including // the one below) for execution numOfRowsInserted = opstmt.executeUpdate(); System.out.println("num of rows inserted: " + numOfRowsInserted ); We next insert another row. This insert will get queued again in a fresh batch. // fourth insert opstmt.setInt(1, 4 ); // following insert is queued for execution by JDBC numOfRowsInserted = opstmt.executeUpdate(); System.out.println("num of rows inserted: " + numOfRowsInserted ); We send this batch explicitly using the sendBatch() method: // now if you want to explicitly send the batch, you can // use the sendBatch() method as shown below. numOfRowsInserted = opstmt.sendBatch(); System.out.println("num of rows sent for batch: " + numOfRowsInserted ); Finally, we commit our transaction and end the program: oconn.commit(); } catch (Exception e) { // handle the exception properly - in this case, we just // print a message and roll back JDBCUtil.printExceptionAndRollback( oconn, e ); } finally { // close the result set, statement, and connection. private bool CustNameRequired(object target, RuleArgs e) { If (string.IsNullOrEmpty(((Customer)target).Name) { e.Description = "Customer name required"; return false; } else return true; } If the length of the target object s Name property is zero, then the rule is not satisfied, so it returns false. It also sets the Description property of the RuleArgs object to a human-readable description of why the rule is broken. This illustrates a rule that would be implemented within a single business class. By using reflection, it is possible to write entirely reusable rule methods that can be used by any business class. You ll see some examples of this in the Common Business Rules section of 5 when I discuss the CommonRules class. vb.net code 39 reader Visual Studio . NET Barcode Scanner Library API for . NET Barcode ...
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