birt barcode4j REDO AND UNDO in Objective-C

Connect ECC200 in Objective-C REDO AND UNDO

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Note WPF does include ObservableCollection<T> as a base class to support data binding. While that base class is useful in WPF, it is not recognized by Windows Forms or Web Forms data binding. Fortunately, BindingList<T> is recognized by all current UI technologies, including WPF, so is the best choice for any collection that needs to support any UI.

Probably the only weird looking bit of code is this line: $("#div1").html("hello jQuery"); Let's dissect it: The $ sign is an alias that tells the browser to use the jQuery namespace. You could instead replace it with jQuery("#div1") if you want, but that would involve more typing, so don t be silly. The text "#div1" tells jQuery to select all elements with an ID of div1. jQuery will return a wrapped set of all elements matching the selector. Note that even if your selector returns just one element, you will be working with a wrapped set. jQuery also allows you to utilize CSS type selectors and adds a few of its own that you will look at shortly. The .html() function is jQuery's version of the innerHTML property and it applies the change to all elements in the returned set.

Defines the scope of the page to be cached or not. The NavigationCacheMode enum has three possible values: Disabled value determines no cache for that page. Each visit a new instance of the page is created. Required value determines that the page is always cached regardless of the cache size of the frame. Enabled value determines that the page will be cached only until the size of the cache for the frame exceeds the specified value. Provides access to the Uri and the QueryString data. Provides access to the NavigationService instance that the Frame is using. Exposes the same properties as Frame except for JournalOwnership. It also exposes the same events as Frame. A navigation request can be initiated from a Page via this object. Note that the NavigationService class provides methods, properties, and events to support navigation in Silverlight applications. The text of the Title property gets displayed in the navigation history and the browser s title bar. If this is not set, the title bar and navigation history show the URI.

Figure 1-9. The Workflow information dialog box shown utilizing the new Office 2007 Forms Server If the Office Forms Server is not installed in the environment, then the only option available to us as Workflow Builders and Administrators will be the ASPX forms. File Menu Integration OK, so technically there is no File menu anymore another one of those little changes in the Office client applications that will take a little getting used to. In place of the File menu, we now have a construct known (again in beta-terminology) as the Office Button. Clicking the Office Button will reveal what is effectively the old File menu on steroids, as shown in Figure 1-10. We ll see the Workflow features of the Office Button in action later as we walk through the various scenarios (although you can get a sneak preview of some of the functionality in Figure 1-10).

The List<T> class includes two methods for changing the order of the items in the collection. These methods are described in Table 19-7. Table 19-7. Members for Sorting List Items

if (Gamer.SignedInGamers.Count < 1) { Guide.ShowSignIn(1, false); log.Add("Opened User SignIn Interface"); } else { currentGameState = GameState.SignedIn; log.Add(Gamer.SignedInGamers[0].Gamertag + " logged in - proceed to SignedIn"); } If no account has been logged in, you activate the Sign In interface, allowing the user to select or create an account. Once an account has been selected, Gamer.SignedInGamers.Count will no longer be 0. During the next update phase, the current state will be set to SignedIn, and a message containing the name of the player is added to a log.

CloudQueueMessage message = new CloudQueueMessage(txtMessage.Text); queue.AddMessage(message); txtMessage.Text = ""; } 4. The last step is to again tell Azure how to access the storage. Open ServiceDefinition.csdef and add the following inside the ConfigurationSettings block: <Setting name="DataConnectionString" /> 5. Add the following settings in the ServiceConfiguration.cscfg configuration block: <Setting name="DataConnectionString" value="UseDevelopmentStorage=true" /> 6. 7. 8. 9. Press F5 to run the application. You will see a textbox and a button. Enter something like Message1 in the text box, then click the Add button. Click Show Queue to display the contents of the queue. The queue should show your message. Click Show Queue again. No items should be returned as they have been read already.

Figure 1-13. Business logic centralized in the Business layer Ideally, this business logic will run on the same machine as the interface control code when interacting with the user, but on the same machine as the data access code when interacting with the database. (As discussed earlier, all of this could be on one machine or a number of different machines, depending on your physical architecture.) It must provide a friendly interface that the interface developer can use to invoke any validation and manipulation logic, and it must also work efficiently with the Data Access layer to get data in and out of storage. The tools for addressing this seemingly intractable set of requirements are mobile business objects that encapsulate the application s data along with its related business logic. It turns out that a properly constructed business object can move around the network from machine to machine with almost no effort on your part. The .NET Framework itself handles the details, and you can focus on the business logic and data. By properly designing and implementing mobile business objects, you allow the .NET Framework to pass your objects across the network by value, thereby copying them automatically from one machine to another. This means that with little extra code, you can have your business logic and business data move to the machine where the Interface Control layer is running and then shift to the machine where the Data Access layer is running when data access is required. At the same time, if you re running the Interface Control and Data Access layers on the same machine, then the .NET Framework won t move or copy your business objects. They re used directly by both tiers with no performance cost or extra overhead. You don t have to do anything to make this happen, either .NET automatically detects that the object doesn t need to be copied or moved and thus takes no extra action. The Business layer becomes portable, flexible, and mobile, and it adapts to the physical environment in which you deploy the application. Because of this, you re able to support a variety of physical n-tier architectures with one code base, whereby your business objects contain no extra code to support the various possible deployment scenarios. What little code you need to implement to support the movement of your objects from machine to machine will be encapsulated in a framework, leaving the business developer to focus purely on the development of business logic.