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OracleResultSet orset = null; try { pstmt = conn.prepareStatement( stmtString ); orset = (OracleResultSet) pstmt.executeQuery(); while(orset.next()) { int empNo = orset.getInt( 1 ); String name = orset.getString( 2 ); System.out.println("emp no : " + empNo ); System.out.println("emp name : " + name ); We use the method getORAData() of the OracleResultSet interface to retrieve the reference object as an object of class EmployeeRef: EmployeeRef managerRef = (EmployeeRef) orset.getORAData(3, EmployeeRef.getORADataFactory()); // retrieve the underlying object if( managerRef != null ) { We then use the method getValue() to retrieve the employee object to which this reference object points, and then print out all its attributes using the custom class generated methods: Employee manager = managerRef.getValue(); System.out.println("\t manager emp no" + manager.getEmpNo()); System.out.println("\t manager emp name" + manager.getName()); System.out.println("\t manager's manager ref " + manager.getManager()); } } } finally { JDBCUtil.close( orset); JDBCUtil.close( pstmt); } } Updating a Ref Object Updating a Ref object simply means making it point to a different row in the table. The following _doUpdateRef() method does that by first invoking the method _getRefForUpdate() to retrieve the Ref object, and then invoking the method _updateEmployeeRef() to update the reference object in the table: private static void _doUpdateRef( Connection conn ) throws SQLException { vb.net gs1 128 Packages matching GS1-128 - NuGet Gallery
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VB . NET GS1-128 Generator for .NET class, Data Matrix, PDF417, QRCode, Code128, Code39. EmployeeRef newManagerRef = _getRefForUpdate( conn, 1 ); _updateEmployeeRef( conn, 3, newManagerRef ); conn.commit(); } The definition of the method _getRefForUpdate() basically is the same as that of the method _doSelectRef() covered in the earlier section titled Querying a Ref Object. The only difference is that it uses the for update nowait clause to lock the row so that another session does not update the same row before we complete our update. Again, this problem, known as the lost update problem, along with its suggested solutions, is discussed in detail in 16. private static EmployeeRef _getRefForUpdate( Connection conn, int empNo ) throws SQLException { String stmtString = "select ref(e) " + " from emp_table_with_ref e " + " where e.emp_no = for update nowait"; PreparedStatement pstmt = null; OracleResultSet orset = null; try { pstmt = conn.prepareStatement( stmtString ); pstmt.setInt( 1, empNo ); orset = (OracleResultSet) pstmt.executeQuery(); orset.next(); EmployeeRef managerRef = (EmployeeRef) orset.getORAData(1, EmployeeRef.getORADataFactory()); return managerRef; } finally { JDBCUtil.close( orset); JDBCUtil.close( pstmt); } } The method _updateEmployeeRef() takes the selected reference object and performs the actual update: private static void _updateEmployeeRef( Connection conn, int empNo, EmployeeRef newManagerRef ) throws SQLException { vb.net ean 128 reader GS1 128 Generator DLL in VB | Free . NET program sample code ...
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I suggest you use Google as there is a lot of information on the topic: http://en. lmgtfy.com/?q=ucc+ ean - 128 +barcode+generator[^]. —SA. The getRoles procedure will return the list of roles to populate the RoleList and Roles objects as follows: CREATE PROCEDURE [dbo].[getRoles] AS SELECT Id,Name,LastChanged FROM Roles RETURN All the role data is returned as a result of this procedure. Though RoleList and Roles use the data differently, they both use the same set of values. The statement string for the update simply sets the reference column manager to the passed value. Later, we use the method setRef() of the PreparedStatement interface to carry out the actual update. In this case, we effectively change the data so that Jack reports directly to Larry instead of reporting to John. String updateStmtString = "update emp_table_with_ref e" + " set e.manager = " + " where e.emp_no = "; PreparedStatement pstmt = null; try { pstmt = conn.prepareStatement( updateStmtString pstmt.setRef( 1, newManagerRef ); pstmt.setInt( 2, empNo ); pstmt.execute(); } finally { JDBCUtil.close( pstmt); } } } //end of program As with a standard Windows server manager, you have buttons for starting and stopping the Object Server. The New and Delete buttons allow you to add AOSs to the computer that is selected. This allows you to use the same computer to run different instances or configurations, for example. The Startup Button The Startup button allows you to specify how the server manager is to start a particular AOS (see Figure 3-23). It is somewhat equivalent to the startup dialog of the Windows service manager. The addRole procedure adds a new entry to the Roles table: CREATE PROCEDURE [dbo].[addRole] ( @id int, @name varchar(50), @newLastChanged timestamp output ) AS INSERT INTO Roles (Id,Name) VALUES (@id,@name) SELECT @newLastChanged = LastChanged FROM Roles WHERE Id=@id RETURN This stored procedure is called by the Role object when it needs to insert its data into the database. As with the other add procedures, this one returns the new value of the LastChanged column for use by the business object. Summary The updateRole procedure updates an existing entry in the Roles table: CREATE PROCEDURE [dbo].[updateRole] ( @id int, @name varchar(50), @lastChanged timestamp, @newLastChanged timestamp output ) AS UPDATE Roles SET Name=@name WHERE Id=@id AND LastChanged=@lastChanged IF @@ROWCOUNT = 0 RAISERROR('Row has been edited by another user', 16, 1) This dialog consists of three control groups. In the first, Startup Type, you specify how you actually want the AOS to be started: vb.net gs1 128 Create GS1 - 128 Bar Codes with VB . NET - RasterEdge.com
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