barcodelib.barcode.asp.net.dll download Managed Code-Behind .NET Integration in Visual Basic .NET

Encoder Denso QR Bar Code in Visual Basic .NET Managed Code-Behind .NET Integration

Managed Code-Behind .NET Integration
QR Code Creator In VB.NET
Using Barcode creation for VS .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
www.OnBarcode.com
QR Code Recognizer In VB.NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Support for the.NET Framework 4 and 3.5 with the Common Language Runtime (CLR) for Silverlight, and thus support for .NET managed code-behind code using the default .NET class libraries, is a key capability of Silverlight. The CLR basically provides memory management, garbage collection, typesafety checking, and exception handling. Additionally, the Base Class Library (BCL) contains a set of components that provide basic programming capabilities like string handling, regular expressions, input and output, reflection, collections, globalization, integration to WCF services, and networking capabilities. So far, you have seen several user interfaces created in XAML. Each XAML file has a corresponding code-behind file; however, there is a third file that we have not yet discussed explicitly. If you open the XAMLTour project in Visual Studio, open the MainPage.xaml.cs file, right-click the InitializeComponent method call, and choose Go to Definition, you will be taken to the MainPage.g.i.cs file. This is a generated file based on the XAML. Any objects in the XAML that have an x:Name will cause a class member to get placed in this generated file. Partial classes in C# make this assemblage of different pieces easy, as illustrated in Figure 2-9.
PDF-417 2d Barcode Generator In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET applications.
www.OnBarcode.com
Encoding GS1 - 12 In VB.NET
Using Barcode encoder for VS .NET Control to generate, create GS1 - 12 image in .NET applications.
www.OnBarcode.com
Note The x:Name property on objects can be set only in XAML. This is most likely because the object is either created in XAML (in which case it needs a corresponding member on the class for manipulation in the codebehind) or created in code (in which case you have a reference to it that you can name and store however you like).
UCC - 12 Generator In VB.NET
Using Barcode creator for VS .NET Control to generate, create GS1-128 image in Visual Studio .NET applications.
www.OnBarcode.com
Code 128C Printer In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 128 image in .NET framework applications.
www.OnBarcode.com
SILVERLIGHT CONCEPTS
Linear Maker In Visual Basic .NET
Using Barcode creation for .NET framework Control to generate, create 1D Barcode image in .NET framework applications.
www.OnBarcode.com
Printing EAN 8 In VB.NET
Using Barcode generation for .NET framework Control to generate, create UPC - 8 image in Visual Studio .NET applications.
www.OnBarcode.com
Figure 2-9. How the full class implementation for XAML comes together
Painting QR-Code In Objective-C
Using Barcode generator for iPhone Control to generate, create Quick Response Code image in iPhone applications.
www.OnBarcode.com
QR Code JIS X 0510 Drawer In None
Using Barcode generator for Font Control to generate, create QR Code image in Font applications.
www.OnBarcode.com
Application and MainPage Classes
Generating Data Matrix In Java
Using Barcode generation for Java Control to generate, create Data Matrix image in Java applications.
www.OnBarcode.com
Making PDF-417 2d Barcode In .NET Framework
Using Barcode generator for .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
When you create a new Silverlight application in Visual Studio or Expression Blend, you might notice an App.xaml file along with an App.xaml.cs file. The application is based on the System.Windows.Application class it supports centralization of resources for the application, it supports several important events, and it provides a direct connection to the browser/host environment. The code placed in the initial project includes App.xaml and App.xaml.cs files. The App.xaml file doesn t have much in it, but there is one important feature to observe: <Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="XAMLTour.App"> <Application.Resources> </Application.Resources> </Application> The Application class contains a Resources element. Any resources specified in the Application class can be referenced throughout a Silverlight application. This is the perfect place to put style and template resources that are available to the entire application. The UserControl is actually turned into the main user interface for the application in the code-behind file, App.xaml.cs, as follows: using using using using using using using System; System.Collections.Generic; System.Linq; System.Net; System.Windows; System.Windows.Controls; System.Windows.Documents;
QR-Code Encoder In None
Using Barcode encoder for Office Word Control to generate, create QR Code ISO/IEC18004 image in Microsoft Word applications.
www.OnBarcode.com
UPC-A Supplement 5 Generation In Java
Using Barcode encoder for Android Control to generate, create UCC - 12 image in Android applications.
www.OnBarcode.com
SILVERLIGHT CONCEPTS
Make PDF-417 2d Barcode In Java
Using Barcode creation for Java Control to generate, create PDF 417 image in Java applications.
www.OnBarcode.com
GS1 128 Generator In None
Using Barcode maker for Font Control to generate, create EAN128 image in Font applications.
www.OnBarcode.com
using using using using
Generating Data Matrix 2d Barcode In None
Using Barcode encoder for Software Control to generate, create DataMatrix image in Software applications.
www.OnBarcode.com
Decode Barcode In Java
Using Barcode Control SDK for BIRT Control to generate, create, read, scan barcode image in Eclipse BIRT applications.
www.OnBarcode.com
System.Windows.Input; System.Windows.Media; System.Windows.Media.Animation; System.Windows.Shapes;
Barcode Maker In Java
Using Barcode generation for BIRT Control to generate, create Barcode image in BIRT applications.
www.OnBarcode.com
Recognize ANSI/AIM Code 128 In .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
namespace XAMLTour { public partial class App : Application { public partial class App : Application { public App() { this.Startup += this.Application_Startup; this.Exit += this.Application_Exit; this.UnhandledException += this.Application_UnhandledException; InitializeComponent(); } private void Application_Startup(object sender, StartupEventArgs e) { this.RootVisual = new MainPage(); } private void Application_Exit(object sender, EventArgs e) { } private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e) { // If the app is running outside of the debugger then report the exception using // the browser's exception mechanism. On IE this will display it a yellow alert // icon in the status bar and Firefox will display a script error. if (!System.Diagnostics.Debugger.IsAttached) { // NOTE: This will allow the application to continue running // after an exception has been thrown // but not handled. // For production applications this error handling should be replaced with something that will // report the error to the website and stop the application. e.Handled = true; Deployment.Current.Dispatcher.BeginInvoke(delegate { ReportErrorToDOM(e); }); } }
SILVERLIGHT CONCEPTS
private void ReportErrorToDOM(ApplicationUnhandledExceptionEventArgs e) { try { string errorMsg = e.ExceptionObject.Message + e.ExceptionObject.StackTrace; errorMsg = errorMsg.Replace('"', '\'').Replace("\r\n", @"\n"); System.Windows.Browser.HtmlPage.Window.Eval ("throw new Error(\"Unhandled Error in Silverlight 2 Application " + errorMsg + "\");"); } catch (Exception) { } } } } } The RootVisual property on the Application class specifies what will be shown when the application starts. The generated App.xaml.cs file also registers itself for all application-level events. The Startup method comes registered with a method that establishes where the main user interface comes from (RootVisual). This Startup event handler is where the connection to the MainPage class was established in the project code for this chapter. The Exit event comes registered with the empty handler method. The UnhandledException event comes registered with the method reporting exception using the browser s exception mechanism. The ReportErrorToDOM event comes registered with the method handling JavaScript exceptions. If you would like to have a XAML class other than MainPage class as a start-up page, then you need to update the application startup event appropriately. These application events are the first events you ve seen in this chapter. Many of the objects in Silverlight support events that can be hooked up either in the code-behind, as in the App.xaml.cs code, or through XAML. The MainPage class represents the main user interface of the application by default. It contains the XAML markup MainPage.xaml derived from the UserControl and code-behind file MainPage.xaml.cs to perform application-level functionalities by integrating with the XAML user interface through events. The MainPage.xaml defines the start-up main user interface of the Silverlight application. The default user interface is mainly derived from the UserControl and the Grid control as the root layout control, as shown here. <UserControl x:Class="SilverlightApplication1.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot" Background="White">
Copyright © OnBarcode.com . All rights reserved.