ASP.NET Web PDF Document Viewer/Editor Control Library

public class MyHttpModule : IHttpModule { private HttpApplication app; public MyHttpModule() { } public void Dispose() { } public void Init(HttpApplication context) { app = context; app.BeginRequest += new EventHandler(app_BeginRequest); } void app_BeginRequest(object sender, EventArgs e) { string s = app.Request.Path; if (s.IndexOf(".aspx") == -1) if (s.Substring(s.LastIndexOf(".") + 1, 3) == "cfm") app.Context.RewritePath(s.Substring(0,s.Length-3) + "aspx"); } } To use this module from a web application, add a reference to the assembly where it s defined, and add an add element as a child of the HttpModules element. <httpModules> <add name="CFMRedir" type="HttpAppReuse.MyHttpModule,HttpAppReuse"/> </httpModules> The last step is to map the CFM extension to the .NET Framework. You can do this in the Application Configuration section of the IIS properties for the web directory, as shown in Figure 2-11.

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Standard JDBC Interfaces from the java.sql Package Clob Oracle JDBC Classes from the oracle.sql Package CLOB

let contactsXml = XElement.Load(file "contacts2.xml") let contacts = contactsXml.Elements () > contacts |> Seq.filter (fun e -> (elemv e "name").StartsWith "J") |> Seq.map (fun e -> (elemv e "name"), (elemv e "phone"));; val it : seq<string * string> = seq [("John Smith", "+1 626-123-4321")] In this example, we also defined some helper functions: elem to extract from an XElement object the first child element with a given name and elemv to convert that to a string value. You can also use the query operators in building new XML: xelem "results" [ contacts |> Seq.filter

Figure 12-1. JDBC standard interfaces and Oracle implementation classes providing LOB functionality

(fun e -> (elemv e "name").StartsWith "J")

Now request any page from the site. Change the extension in the address bar of the browser to .cfm and resubmit the request. The server redirects to the like-named ASPX page and sends the response down without batting an eye. You can use a similar strategy to ease migration for your users from a website built on an older technology to one built using ASP .NET.

JDBC has two standard interfaces, java.sql.Clob and java.sql.Blob, for supporting internal LOBs. The Oracle classes oracle.sql.CLOB and oracle.sql.BLOB implement these interfaces, respectively, in addition to adding some functionalities of their own. For the external LOB, there is no standard JDBC class; you have to use the Oracle class oracle.sql.BFILE. Note that instances of the classes CLOB, BLOB, and BFILE contain only the locators of the LOB, but that is all you need to access and manipulate LOB data. In the next few sections, we cover reading from and writing to CLOBs. Assume that we have the following data in our clob_table table: benchmark@ORA10G> select x "Description", id, 2 dbms_lob.getlength( clob_col ) "Length of clob" 3 from clob_table; Description ID Length of clob ------------------------------ ---------- -------------Insert from SQL 1 4000 Insert from PL/SQL 2 32000 From PL/SQL Using chunks 3 64000

This creates a <results> tag and inserts all employees whose last name starts with the letter J. You can also use sequence expressions to achieve the same: xelem "results" [ for e in contacts do if (elemv e "name").StartsWith "J" then yield e ]

The class DemoClobOperations has different methods to read and write to a CLOB that are explained separately in the following sections. The class begins with import statements, and we first get the connection (recall that autocommit is turned off in the method JDBCUtil.getConnection()): /* * This program demonstrates how to read from and write to a CLOB. * COMPATIBLITY NOTE: * runs successfully against 9.2.0.1.0 and 10.1.0.2.0 */ import java.util.Arrays; import java.sql.SQLException; import java.sql.Connection; import java.sql.Clob; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.OutputStreamWriter; import java.io.Writer; import java.io.OutputStream; import java.io.InputStreamReader; import java.io.IOException; import java.sql.PreparedStatement; import java.sql.CallableStatement; import java.sql.ResultSet; import oracle.sql.CLOB; import book.util.JDBCUtil;