winforms pdf 417 reader

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At the end of the request, Seam destroys its event context. The conversation context isn t destroyed; the user of the application started a long-running conversation by executing a search. The application waits for user input while showing the edit page. If the user searches again in another browser window, a second, concurrently running conversation is started and promoted to a longrunning conversation. The two conversations and their contexts are isolated automatically by Seam. Editing an item When the user clicks Save, the edit form is submitted to the server with an HTTP POST request (figure 17.7). The view that is restored in this request is edit.xhtml, JSF recreates an internal widget tree of the form and all its fields and applies the HTTP request values. Validation is slightly more complex; you ve defined a few more JSF validators on the edit.xhtml page. After successful validation, JSF updates the bound model values by calling the setter methods on the Item instance returned by itemEditor.getItem(). The itemEditor binding resolves (through Seam) to a contextual variable in the current conversation context. Seam extended the conversation context into the

<caching> <sqlCacheDependency enabled="true" > <databases > <add name="DBName" pollTime="500" connectionStringName="connectionString"/> </databases> </sqlCacheDependency> </caching>

Here, the method to be invoked is Precise. The parameters are different from the ones in the delegate, as is the return value. The anonymous function can wrap up the changes and assign a complete solution to the delegate for later invocation. cf. C# Language Specification Version 3.0, September 2007, Section 6.5

We can write an event handler to fire all changes to the server like so:

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A server control is a control that you can program by writing server-side code to respond to events from the control. Server controls contain the runat="server" attribute and must exist within a form that has the same runat attribute. The Label control displays text at a specific location on the webpage by using the properties that have been assigned to the Label control. The Literal control returns text without any additional processing and is useful when you need to return raw HTML. The TextBox control collects text from the user.

Query q = session.createQuery("from Item i, Bid b"); // Query q = em.createQuery("select i, b from Item i, Bid b"); Iterator pairs = q.list().iterator(); // Iterator pairs = q.getResultList().iterator(); while ( pairs.hasNext() ) { Object[] pair = (Object[]) pairs.next(); Item item = (Item) pair[0]; Bid bid = (Bid) pair[1]; }

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outer one, outer rows were added for customers with no orders. COUNT(*) would have added outer rows to the count, undesirably producing a count of one order for FISSA. COUNT(O.orderid) correctly counts the number of orders for each customer, producing the desired value 0 for FISSA. Remember that COUNT(<expression>) ignores NULLs just like any other aggregate function.

DISTRIBUTED FILE SYSTEM (DFS)

Many of the rule engines are implementations of a well-known Rete algorithm.1 Others use a backward-reasoning algorithm. Using these algorithms, the engines can evaluate the rules several times faster than the procedural evaluation of equivalent if-then statements. Rules relate the facts pertaining to the current situation to corresponding actions. The set of facts is also called a knowledge base, or working memory. When it is run, the engine evaluates the rules based on the facts, and then triggers the actions associated with the rules that evaluate to true. The languages that the engines use to express the rules and facts vary widely from LISP-like syntax to pseudo-English. They all, however, express the if-then rules in some engine-specific way. New languages on the horizon, such as RuleML, offer the possibility of a standard way to express rules independently of the rule engine. Many rule engines are available, ranging from commercial offerings to free or open source projects. A few of them are implemented in Java. With these engines, Java objects are loaded into an engine s working memory as facts, and the engine can create facts based on those objects as well as invoke actions expressed in Java on those objects. 12.6.2 Using a rule engine Implementing business rules using a rule engine involves the following steps:

private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here. string strDate; string strRet; strDate=""; GolfArticle.GetGolfArticle Article; Article=new GolfArticle.GetGolfArticle(); strRet=Article.GetArticle( ref strDate,"Ragone, Nick", "Doug","Testonly"); Label1.Text=strRet; Label2.Text=strDate;

As with constants, variables can be defined either within a procedure, or outside a procedure but within a type. (Variables and constants declared outside a procedure are known as fields. Variables and constants declared inside a procedure are known as local variables and local constants, respectively.) The Dim keyword is always used with in-procedure variable declarations. At the type level, the Dim keyword is replaced by one of the following access modifiers:

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