vb.net code to merge pdf files

vb.net merge pdf files

vb.net code to merge pdf files

vb.net code to merge pdf files

vb.net itextsharp merge pdf files

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Suppose your database runs out of undo space when it is executing the fivehundredth SQL statement As mentioned earlier, this would result in you typically issuing a rollback, thus undoing all the work done so far To solve this problem, the following solutions exist from a developer s point of view: Tune the SQL statements to reduce the overall resources consumed by them (including the undo space required) This is the best solution to the problem, is possible in the majority of cases, and is what you as a developer should consider first Ask your DBA to allocate more undo space so that you don t run out of it in the midst of the transaction This is a perfectly acceptable solution if you have already gone through step 1 and are still encountering the problem.

Both QoS and filtering rely on a new notification type introduced with Notification Services. The new type, called a structured event, largely replaces the older typed events, which were part of the Event Service specification. Typed events provided a mechanism through which a caller could call methods of an application-specific interface. Implementers and users alike had complained that typed events were confusing and difficult to implement. The newer structured events are essentially messages composed of a header and body, as shown in Figure 5-20.

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You can reconnect the pivot table to the named range, in its new location: 1. Open both files the file with the pivot table, and the file that contains the source data. 2. Activate the file that contains the pivot table, and then select a cell in the pivot table. 3. On the Ribbon, click the Options tab, and in the Data group, click Change Data Source. 4. While the Change PivotTable Data Source dialog box is open, on the Ribbon, click the View tab. Click Switch Windows, and select the workbook that contains the source data. 5. Select the table that contains the source data, and then click OK.

Remember, disks are cheap nowadays developer time is not! Divide the transaction into shorter transactions so that you issue intermittent commits to reduce the amount of undo space each of these transactions consumes Do not do this! This is the worst solution for the problem, for the following reasons: It compromises your data integrity Remember the banking transaction One equivalent of this solution would be issuing an intermittent commit after steps 1, 2, and 3 as shown 1 Decrease the savings account balance by $1,000,000 2 Issue a commit 3 Increase the checking amount in the checking account by $1,000,000 4 Issue another commit 5 Do the banking application s financial transaction related actions 6 Issue the final commit..

Figure 5-20. The layout of structured events The header is divided into two parts: a fixed portion and a variable portion. The fixed portion is very short and must be included in all structured event messages. It contains basic information, such as a domain name, a type name, and an event name. As an example, a stock-tracking application might create a structure event with the domain name NYSE Stock Quotes , the type name TickerAlarms , and the event name IBM . The fixed portion of the header data makes it possible for an event channel to group notifications for storage in an event repository. The purpose of such a repository is to provide persistence in the case of hardware failures and to allow consumers to browse stored notifications by type, name, or name-value combination. The variable portion of the header is optional and can contain an arbitrary number of name-value pairs, which you can also use to set QoS settings on a per-message basis. The message body is also divided into two parts, as the message header. The first part can contain an arbitrary number of name-value pairs that you can use for filtering purposes. The main body contains the real payload of the notification and can be arbitrarily long. The body is contained in a single variant field (of type CORBA::Any), so it can contain a string, a number, binary data, an array, or a custom type.

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