vb.net create tiff image

vb.net create tiff image

vb.net create tiff image

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There are several other important things you need to know about comments: Nested comments are not allowed. Only one comment can be in effect at a time. The comment that starts first is in effect until the end of its scope. The scope for particularly comment types is as follows: For single-line comments, the end of the current line For delimited comments, the first end delimiter encountered The following attempts at comments are incorrect: Opens the comment /* This is an attempt at a nested comment. /* Ignored because it is inside a comment Inner comment */ Closes the comment because it is the first end delimiter encountered */ Syntax error because it has no opening delimiter Opens the comment // Single-line comment */ Ignored because it is inside a comment /* Nested comment Incorrect because it has no opening delimiter

The IT department generally initiates the bottom-up approach The members of the IT department have a detailed understanding of the daily operations and interactions of the software systems they manage This detailed knowledge is used to predict which technical functions are likely candidates to become reusable services For our second example of service mapping, a software developer makes this recommendation to the IT department: We do a lot of sales where credit cards are used as the method of payment, and we use several different credit card payment companies to charge credit cards, depending on which application is taking the order Furthermore, if one processing agency is responding too slowly, we have logic written in each sales application to fail over to a different credit card processing agency We should create a single service for credit card processing and encapsulate the fail-over logic so it s reusable.

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To strongly name an assembly using Visual Studio 2008, you must have a copy of the public/ private key pair file. If you don t have a key file, you can have Visual Studio generate one for you. You can then do the following: Open the properties of the project. Select the Signing tab. Select the Sign the Assembly check box and enter the location of the key file. When you compile the code, the compiler will produce a strongly named assembly. The inputs and output of the compiler are illustrated in Figure 10-15.

For demonstration purpose, let s query for a book whose ISBN is 1932394419. Here s the JDBC code for this task: PreparedStatement stmt = connection.prepareStatement ("SELECT * FROM BOOK WHERE ISBN = "); stmt.setString(1, "1932394419"); ResultSet rs = stmt.executeQuery(); while (rs.next()) { System.out.println("ISBN : " + rs.getString("ISBN")); System.out.println("Book Name : " + rs.getString("BOOK_NAME")); System.out.println("Publisher Code : " + rs.getString("PUBLISHER_CODE")); System.out.println("Publish Date : " + rs.getDate("PUBLISH_DATE")); System.out.println("Price : " + rs.getInt("PRICE")); System.out.println(); } rs.close(); stmt.close();

See the difference in the level of technical detail The bottom-up approach is applied when the details are well known The IT department is fixing an important issue, but one that is so low level that most line-of-businesspeople aren t aware of it As you can see in Figure 10-10, the service map is simple The decision-making process to determine the map should be straightforward after our first exercise First, you need an application service that encapsulates both the fail-over logic and the agency-specific connection information If you need to add or remove a credit card processing agency, then that function will need to happen at the ASL level, and the changes shouldn t affect any of the service consumers Next, you know that this credit card service will be invoked by your sales applications; therefore, you must have an ESL-level service (because you re crossing domains).

Deploying a program on a target machine can be as simple as creating a directory on the machine and copying the application to it. If the application doesn t need other assemblies (such as DLLs), or if the required DLLs are in the same directory, the program should work just fine where it is. Programs deployed this way are called private assemblies, and this method of deployment is called xcopy deployment. Private assemblies can be placed in almost any directory, and are self-sufficient as long as all the files on which they depend are in the same directory or a subdirectory. In fact, you could have several directories in various parts of the file system, each with the identical set of assemblies, and they would all work fine in their various locations. Some important things to know about private assembly deployment are the following: The directory in which the private assemblies are placed is called the application directory. A private assembly can be either strongly named or weakly named. There is no need to register components in the registry. To uninstall a private assembly, just delete it from the file system.

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