Simple .NET/ASP.NET PDF document editor web control SDK

Assuming you have a version of SQL Server installed, you can create a new SQL Server database in Visual Studio s Server Explorer (Ctrl+Alt+S, or View Server Explorer) by right-clicking Data Connections and selecting the Create New SQL Server Database menu item. In the screen shown in Figure 15-2, you can configure your connection details and specify the name of the new SQL Server database.

vb.net qr code open source, onbarcode.barcode.winforms.dll download, winforms code 128, gs1-128 vb.net, vb.net ean-13 barcode, codigo fuente pdf417 vb.net, itextsharp remove text from pdf c#, find and replace text in pdf using itextsharp c#, data matrix vb.net, itextsharp remove text from pdf c#,

NET Framework, as security is the vertical slice that passes across all the layers in the stack We ll then look at Microsoft s options and solutions for the middle tier of a distributed app, examining both those in the present and in the not-so-distant future In this part of the book, we ll also examine your options for marshaling calls for services and data between layers Here, we ll consider the options and the technologies in their different permutations This is the most precarious balancing you ll undertake during application design Even after you ve decided on the technologies to use for the.

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 {

Figure 15-2. Creating a new Microsoft SQL Server database Besides creating a new database, this also creates a Server Explorer connection to the new database, which you can use in Visual Studio to browse, create, manipulate, or delete tables, triggers, views, stored procedures, functions, and other database artifacts.

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 {

One of the best ways to understand how to use the request processing pipeline is to examine the examples that ship with the Framework. Much of the functionality that ships with ASP .NET is implemented by extending this pipeline. We ll examine these extensions in this section. Each of the events in the pipeline can actually be captured by n different implementations of traps for these methods. Table 2-3 provides a summary of the traps implemented for canned Framework functionality. Table 2-3. Summary of Built-in Framework Modules and Events They Trap