Headline

Web programming in C# with Silverlight

Motivation

The implementation illustrates the development of a client-side user interface accessible via web browser. We used Technology:Silverlight in combination with the Technology:Navigation framework navigation to create an MVC based implementation. The web application is tied to a web service, which is implemented in Contribution:wcf. An advantage of Silverlight is the out-of-the-box back button support.

Illustration

There have to be proxy DTOs enabling the client to receive the serialized data from the web service. These proxies are generated from a Language:WSDL file. The namespace for the generated classes is

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. These proxies are Language:CSharp classes located in References/CompanyServiceReference/Reference.cs:

namespace silverlight.CompanyServiceReference {
	using System.Runtime.Serialization;    

	// The class "CompanyDto" is the proxy DTO for serialized company data.
	[System.Diagnostics.DebuggerStepThroughAttribute()]
	[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")]
	[System.Runtime.Serialization.DataContractAttribute(Name="CompanyDto", Namespace="http://schemas.datacontract.org/2004/07/wcf.Dto")]
	public partial class CompanyDto : object, System.ComponentModel.INotifyPropertyChanged {

		...

	}

	...

	// The connection point to the company service provided by the wcf implementation.
	[System.Diagnostics.DebuggerStepThroughAttribute()]
	[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
	public partial class CompanyServiceClient : System.ServiceModel.ClientBase<silverlight.CompanyServiceReference.ICompanyService>, silverlight.CompanyServiceReference.ICompanyService {

		...

	}

	...

}

GUI

The proxy in combination with the

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allows us to create an asynchronous communication asynchronous request.

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The illustrated code creates a service client and waits, until the company data are completely delivered to the client. The result is a DTO, which is stored in the

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:

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We are now able to fill the GUI with the help of the

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. Each field of the DTO is automatically binded to the GUI defined by the Language:XAML files by using binding properties. For example, the this!!silverlight/Home.xaml contains a field
txtCompanyName
binded to the field Name of the DTO.

<TextBlock Height="23" HorizontalAlignment="Left" Margin="59,46,0,0" Name="txtCompanyName" Text="{Binding Name}"

Architecture

The project is represented as two Visual Studio projects:

  • silverlight.Web contains the generated bootstrap code for launching the silverlight application.
  • silverlight contains the actual implementation. The Language:WSDL file and the generated DTO proxies are located in the folder silverlight/ServiceReferences/CompanyServiceReference. The GUI is provided by Language:XAML files located in the base folder of the project.

Usage

This contribution has been tested under C# and .NET Version 4.0.

Metadata


Kevin edited this article at Wed, 08 Aug 2018 14:12:04 +0200
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