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ASP.NET Web PDF Document Viewer/Editor Control LibraryASP .NET script-generation features have been aggregated and extended via the services the new ClientScript object provides. This object, a property of the Page object, exposes many methods you can use to generate JavaScript, and to avoid sending duplicate blocks of JavaScript to the client. There is a powerful new facility for doing out-of-band callbacks from the client to the server, which allows you to do partial page refreshes and avoid the overhead of a full postback to the server. 14 15 16 17 18 19 20 21 22 23 excel 2013 barcode font download, excel barcode add in free download, barcode add in for word and excel pour windows, generate barcode excel macro, barcode macro excel free, barcode fonts for excel free download, how to create barcodes in excel 2007 free, creating barcodes in excel 2003, free barcode generator excel, how to convert to barcode in excel 2010,Table 3-13 shows some important functions in this library module. The following operators necessarily evaluate all the elements of the input seq immediately: Seq.iter: This iterates all elements, applying a function to each one. Seq.to_list: This iterates all elements, building a new list. Seq.to_array: This iterates all elements, building a new array. Most of the other operators in the Seq module return one or more seq<type> values and force the computation of elements in any input seq<type> values only on demand. 24 25 26 through this layer: data on its way from the database to the user interface and user information posted from a form that kicks off a transaction. This is where the brains and the rules of the application reside. More than the concept of business objects, the functionality of this tier of the application can fall within many categories. As service orientation continues to gain momentum, it becomes more important to understand and leverage messaging infrastructures. For Web-based applications, the application is intrinsically stateless, so frequently the work you need to do does not involve stateful business objects, but rather stateless services processing and preparing messages. There are also many permutations and combinations of layers and tiers in a distributed application. How the layers of an application are deployed across physical tiers will affect the options you have for communicating across these layers. Making the correct choices among these options is critical for the success of any distributed application, as they make up the plumbing of your application. Seq.append Seq.concat Seq.choose Seq.delay Seq.empty Seq.iter Seq.filter Seq.map Seq.singleton Seq.truncate Seq.to_list Seq.of_list Seq.to_array Seq.of_array end; end; / 5 : ('a -> 'b option) -> #seq<'a> -> seq<'b> : (unit -> #seq<'a>) -> seq<'a> seq<'a> : ('a -> unit) -> #seq<'a> -> unit : ('a -> bool) -> #seq<'a> -> seq<'a> : ('a -> 'b) -> #seq<'a> -> seq<'b> : 'a -> seq<'a> : int -> #seq<'a> -> seq<'a> : #seq<'a> -> 'a list : 'a list -> seq<'a> : #seq<'a> -> 'a[] : 'a[] -> seq<'a> Package body created. Let s now look at the Java class, DemoOptLockingUsingShadowColumn, which invokes the opt_lock_shadowcol_demo package methods in order to demonstrate optimistic locking. The class begins with import statements and gets the connection as scott in the main() method: /* This program demonstrates optimistic locking using ora_rowscn (10g only) * COMPATIBLITY NOTE: tested against 10.1.0.2.0.*/ import java.sql.SQLException; import java.sql.Connection; import java.sql.CallableStatement; import oracle.jdbc.OracleTypes; import book.util.JDBCUtil; import book.util.InputUtil; class DemoOptLockingUsingShadowColumn { public static void main(String args[]) throws Exception { Connection conn = null; try { conn = JDBCUtil.getConnection( "scott", "tiger", "ora10g" ); At this point, the user is supposed to have indicated that he wants to update Martin s salary. To simulate that we set the variable empNo to Martin s employee number. int empNo = 7654; Next, we invoke the _displayEmpDetails() method to display Martin s details on the screen that allows the user to modify the details (the ename and sal column values in our example). The method will also return the existing row_change_indicator column value. long rowChangeIndicator = _displayEmpDetails( conn, empNo ); We then pause using our InputUtil.waitTillUserHitsEnter() method (explained in 1) as before: InputUtil.waitTillUserHitsEnter("Row has been selected but is not locked."); At the end of the main() method, we invoke the _updateEmpInfo method with the employee number, the new salary, the new name, and the value of the row_change_indicator column we calculated earlier. This method simply invokes opt_lock_shadowcol_demo. update_emp_info to perform the update. We close the statement in the finally clause as usual: _updateEmpInfo( conn, empNo, 1450, "MARTIN", rowChangeIndicator ); }
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