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The Display interface is similar to the Login interface and has a setter for the name field, a couple of getters for the password fields, a method for enabling or disabling the Change Password button, a callback for handling the blur events on both password fields, and a callback for the click event of the button The corresponding View code is simple, so let s move to the Presenter We don t want the user to attempt changing his password, unless he has entered it twice, and both data entries match We can use a common blur handler for both password fields

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Method update()

You can download the complete solution from the Web site http://wwwchristiannagelcom/enterpriseservices As discussed in 6, "Data Access," GUIDs and timestamps help with disconnected scenarios With NET 20, you can use the static keyword as a class modifier to define a utility class that cannot be instantiated The compiler checks that there are no instance methods with this class You can download the Data Access Application Block from the MSDN Web site: http://msdnmicrosoftcom/library/defaultasp url=/library/en-us/dnbda/html/daab-rmasp When using services without components, you can define transactional requirements within the method level, as discussed in 7, "Transaction Services" The class CourseData was discussed in the previous section, because this class is in the assembly CourseManagementData The ASPNET cache is discussed in 9, "State Management" The CourseRegistration class is shown in Listing 15-15 Queued components are covered in 10, "Queued Components"

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package comfkerekimvpprojectclientchangePassword; // imports public class ChangePasswordFormPresenter extends Presenter<ChangePasswordFormDisplay> { public static String PLACE = "change"; LoginServiceAsync loginService; SimpleCallback<String> loginSuccessCallback; public ChangePasswordFormPresenter( final String params, final ChangePasswordFormDisplay loginDisplay, final Environment environment) { super(params, loginDisplay, environment); loginService = getEnvironment()getModel()getRemoteLoginService(); final SimpleCallback<Object> commonBlurHandler = new SimpleCallback<Object>() { @Override public void goBack(final Object result) { final String pass1 = ChangePasswordFormPresenterthis getDisplay()getPassword1();

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dijit/ColorPalettejs Use dojorequire("dijitColorPalette"); This class creates a widget that displays a grid containing a selection of colors, one of which may be selected by the user There are two built-in palettes available, the 7 x 10 and the 3 x 4 The specific colors are also built into the palette After the user selects a color, the value of the widget is set to the RGB value of the selected color

final String pass2 = ChangePasswordFormPresenterthis getDisplay()getPassword2(); final boolean canLogin = !pass1isEmpty() & pass1equals(pass2); ChangePasswordFormPresenterthisgetDisplay() enableChangePasswordButton(canLogin); } }; loginDisplaysetPasswordBlurCallback(commonBlurHandler); commonBlurHandlergoBack(null);

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This figure shows the 7 10 version of the widget HTML Markup Examples JavaScript Constructor Examples Key Properties Create a ColorPalette widget

If the attribute [ApplicationAccessControl] is not specified, there is no access check with NET Framework 10 This changed with version 11 Here an access check is enabled if this attribute is not applied So it is best to always specify this attribute

Initializing the form is quite straightforward Notice we require some new methods in the Environment object: We ll store in it the current user (whose name we show in a read-only field), the current password (which the user entered in the login form), and the current session key (which was obtained when the user logged in)

All the attributes that can be specified at the assembly level are listed in Table 2-2

new dijitColorPalette({palette:"7x10"}, dojobyId("d1"))

final String currentUser = environmentgetCurrentUserName(); final String currentKey = environmentgetCurrentSessionKey(); final String currentPass = environmentgetCurrentUserPassword(); loginDisplaysetName(currentUser);

Attribute ApplicationId Description [ApplicationID] defines a unique identifier of the application If this attribute is not specified, a unique identifier is created automatically ApplicationActivation This attribute defines whether the application should be configured as server or library application The possible options are ApplicationOptionLibrary and ApplicationOptionServer A library application is running in the process of the client, whereas a server application has its own hosting process dllhostexe ApplicationNameDescription [ApplicationName] and [Description] show up in the Component Services Explorer [Description] can be used with applications, classes, methods, and interfaces ApplicationAccessControl The attribute [ApplicationAccessControl] is used to enable/disable access checking, authentication, and impersonation You will use this attribute in 12, "Security"

Default Description "7 x 10" The 7 x 10 or 3 x 4 values are only valid ones defined by default null RGB value of the selected color

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