.NET/Java PDF, Tiff, Barcode SDK Library

External LOBs, or BFILEs, contain a locator to a binary file that typically resides in the operating system. Let s quickly go through how to use BFILEs in SQL and/or PL/SQL first. In the following example, the BFILE entry points to a text file called bfile_test.txt in the directory C:\TEMP, which contains the following four lines: This This This This is is is is a test. line number 2. line number 3. the final line.

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E-mailing the error message is functionality that can be used from any application, so the abstract Boolean RequiresSSL allows consumers of our type to choose to run this functionality or not. You can leverage this functionality from your existing website. From the Web project, add a reference to the assembly you ve just created, as shown in Figure 2-9.

You can make LINQ-style queries on two types of objects: those implementing the IEnumerable<'a> / seq<'a>" and IQueryable<'a> interfaces. The former is used for in-memory objects or those that can be iterated one by one to provide a uniform way to query and transform, while the latter provides more customization in terms of the deriving object s identity and enables you to control how those operations are actually carried out. Much of the LINQ architecture relies on representing query expressions using reified expression trees through the System.Expressions.Expression type. This type is used to encode lambda expressions in C#, thus giving a straightforward syntax embedding for LINQ-style queries. In F#, meta-programming is built around a similar mechanism F# quotations, discussed in 9. A bridge is used to convert between F# quotations and LINQ expression trees. LINQ queries on queryable objects are encoded as expression trees and translated to the underlying LINQ machinery at run time.

To use a BFILE in SQL, we first need to create a directory object in SQL as follows: benchmark@ORA10G> create or replace directory my_dir as 'C:\TEMP'; Directory created.

XML provides a platform-, operating system , and application-independent way to represent data in a plain-text format. In fact, nowadays XML is ubiquitous; it is widely used to describe application configuration data, as output format for applications such as Microsoft Word and Excel, to wrap data that is sent across networks or as a way to interact with the new generation of database servers, including Oracle 8i and newer or Microsoft SQL Server 2000 and 2005. These database servers can work with XML data directly, allowing you to update the database

Figure 2-9. The Add Reference dialog. Select the Browse tab and the assembly created in the last step. Now change the MyImpl class to inherit from your new base class instead of directly from HttpApplication: public class MyImpl : HttpAppReuse.GenericAbstractHttpApp Since the new base class is abstract, you must also override its abstract member. public override bool RequiresSSL { get { return true; } } Now all requests to .NET resources in your application will be forced to SLL. You could set the property to false and continue to leverage the error handling mechanism without forcing pages to be served over a secure channel. Notice also that your existing event traps continue to work. You re now extending the functionality of your standalone base class instead of HttpApplication. If you don t need to vary functionality across applications, you can create your class as a concrete base class instead of an abstract one. Then you can reference the class name directly from the Inherits attribute of the Application directive in your global.asax.

Note A directory is a database object that serves as an alias for a full path name on the server s file system where the files are actually located. Note that you need to ensure that the directory you give as the argument is valid on your database server. In other words, the directory should be visible to your database server.