.NET/ASP.NET/C#/VB.NET PDF Document SDK

We illustrate each of these steps as part of the description of the class DemoPassing CollectionToProcedure as follows: /** This program demonstrates how to pass a collection into a * PL/SQL procedure from JDBC. * COMPATIBLITY NOTE: * runs successfully against 9.2.0.1.0 and 10.1.0.2.0 */ import java.sql.SQLException; import java.sql.Connection; import java.sql.CallableStatement; import oracle.jdbc.OracleConnection; import oracle.sql.ArrayDescriptor; import oracle.sql.ARRAY; import book.util.JDBCUtil; import book.util.Util; class DemoPassingCollectionToProcedure { The main() method invokes the method _doPassArrayToAProcedure(), passing the Connection object and issuing a commit. The method _doPassArrayToAProcedure() contains the bulk of the logic: public static void main(String args[]) throws Exception { Util.checkProgramUsage( args ); Connection conn = null; try { conn = JDBCUtil.getConnection("benchmark", "benchmark", args[0]); _doPassArrayToAProcedure( conn ); conn.commit(); } finally { // release JDBC resources JDBCUtil.close( conn ); } } The method _doPassArrayToAProcedure() is defined as follows: private static void _doPassArrayToAProcedure( Connection conn ) throws SQLException { CallableStatement cstmt = null; try {

create qr code with vb.net, onbarcode.barcode.winforms.dll free download, winforms code 128, ean 128 vb.net, vb.net ean-13 barcode, pdf417 generator vb.net, itextsharp remove text from pdf c#, replace text in pdf using itextsharp in c#, vb.net datamatrix generator, c# remove text from pdf,

The loading phase involves loading any view state (in case of a postback request) from the page request and loading it in into the server controls. When the view state is restored, the PreLoad event is triggered, followed by the Load event. This is where you normally put your page processing logic that runs on every page request. Following this event, loading the view state is executed again to catch any dynamically added controls (for instance, those created in the Load event handler). Then any control change events and postback events are handled, and finally the LoadComplete event is raised. The rendering phase starts with performing all data binding (which involves the DataBinding and DataBound events for each data-bound control), and then the PreRender event is triggered. Next, any asynchronous tasks (registered via RegisterAsyncTask) are fired off, and the PreRenderComplete event is called. Before the actual rendering takes place, the view state is saved back to the page (by default to the default hidden input field). Finally, the page s Render method is called that produces HTML by recursively invoking the same method on each server control. Before this HTML is passed to the client, the Unload event is triggered and every object involved in the page creation is disposed.

Managed stored procedures are most useful when you need to retrieve a set of data, process each row (the procedural logic), and return the results You can also use a managed stored procedure to encapsulate database update logic In either case, remember that if there is little or no procedural logic to perform, then a T-SQL stored procedure will generally be easier to write and faster to execute The sample stored procedure code, for example, can easily be expressed as a T-SQL stored procedure and, therefore, isn t a good example of a case where you should use a managed procedure User-Defined Functions and Table-Valued Functions After managed stored procedures, the next logical place to apply CLR Integration is when creating managed user-defined functions (UDFs) A UDF is similar to a stored procedure in that it enables you to encapsulate data-oriented logic However, there are a number of important differences.

The first step is to create the array descriptor. Note that we first check if the Connection object has a descriptor already populated with an array descriptor for our varray type. If it does, we can simply reuse the returned array descriptor. If it doesn t, we create one. Please note that the method getDescriptor() is an Oracle extension method, and to access it you need to cast the Connection object to the OracleConnection interface: ArrayDescriptor arrayDescriptor = (ArrayDescriptor) ((OracleConnection) conn).getDescriptor( "BENCHMARK.VARRAY_OF_VARCHARS" ); if( arrayDescriptor == null ) { System.out.println("creating array descriptor"); arrayDescriptor = ArrayDescriptor.createDescriptor( "BENCHMARK.VARRAY_OF_VARCHARS", conn ); } As part of the second step, we first create the array contents. In our case, our varray element is made up of varchar2, so the corresponding Java elements would be String objects. Thus we simply create an array of String with two elements: String[] elements = new String[] { "elem 1", "elem 2" }; We then create the ARRAY object, initializing it with the String array we created above: ARRAY array = new ARRAY ( arrayDescriptor, conn, elements ); The third and final step is to invoke the procedure using the CallableStatement interface. In particular, note that we use the method setArray() to pass the array value to the procedure. We could also have used the method setObject() with the same result: String stmtString = "begin demo_varray_pkg.demo_passing_varray_param( ); end;"; cstmt = conn.prepareCall( stmtString ); cstmt.setArray( 1, array ); cstmt.execute(); } finally { JDBCUtil.close( cstmt); } } } Invoking the preceding class should result in the following output: B:\>java DemoPassingCollectionToProcedure ora10g URL:jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(PORT=1521) (HOST=rmenon-lap))(CONNECT_DATA=(SID=ora10g))) creating array descriptor