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Exploring Reactive Extensions (Rx) through Twitter and Bing Maps Mashups

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2 Dec 2010CPOL16 min read 81K   810   63  
In this article, I give a brief introduction to Reactive Extensions, then explore their use within Silverlight by creating a Twitter / Bing Maps mashup.
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  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProductVersion>8.0.50727</ProductVersion>
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    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>TwitterRx</RootNamespace>
    <AssemblyName>TwitterRx</AssemblyName>
    <TargetFrameworkIdentifier>Silverlight</TargetFrameworkIdentifier>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
    <SilverlightVersion>$(TargetFrameworkVersion)</SilverlightVersion>
    <SilverlightApplication>true</SilverlightApplication>
    <SupportedCultures>
    </SupportedCultures>
    <XapOutputs>true</XapOutputs>
    <GenerateSilverlightManifest>true</GenerateSilverlightManifest>
    <XapFilename>TwitterRx.xap</XapFilename>
    <SilverlightManifestTemplate>Properties\AppManifest.xml</SilverlightManifestTemplate>
    <SilverlightAppEntry>TwitterRx.App</SilverlightAppEntry>
    <TestPageFileName>TwitterRxTestPage.html</TestPageFileName>
    <CreateTestPage>true</CreateTestPage>
    <ValidateXaml>true</ValidateXaml>
    <EnableOutOfBrowser>false</EnableOutOfBrowser>
    <OutOfBrowserSettingsFile>Properties\OutOfBrowserSettings.xml</OutOfBrowserSettingsFile>
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    <ThrowErrorsInValidation>true</ThrowErrorsInValidation>
    <LinkedServerProject>
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       MSBuild 3.5 toolset. In order to work correctly with this older toolset, it needs 
       to set the TargetFrameworkVersion to v3.5 -->
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    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>Bin\Debug</OutputPath>
    <DefineConstants>DEBUG;TRACE;SILVERLIGHT</DefineConstants>
    <NoStdLib>true</NoStdLib>
    <NoConfig>true</NoConfig>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>Bin\Release</OutputPath>
    <DefineConstants>TRACE;SILVERLIGHT</DefineConstants>
    <NoStdLib>true</NoStdLib>
    <NoConfig>true</NoConfig>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Maps.MapControl">
      <HintPath>..\..\..\..\Program Files\Bing Maps Silverlight Control\V1\Libraries\Microsoft.Maps.MapControl.dll</HintPath>
    </Reference>
    <Reference Include="Microsoft.Maps.MapControl.Common">
      <HintPath>..\..\..\..\Program Files\Bing Maps Silverlight Control\V1\Libraries\Microsoft.Maps.MapControl.Common.dll</HintPath>
    </Reference>
    <Reference Include="mscorlib" />
    <Reference Include="System.CoreEx, Version=1.0.2787.204, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
      <Private>True</Private>
    </Reference>
    <Reference Include="System.Observable, Version=1.0.0.204, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
      <Private>True</Private>
    </Reference>
    <Reference Include="System.Reactive, Version=1.0.2787.204, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
      <Private>True</Private>
    </Reference>
    <Reference Include="System.Runtime.Serialization" />
    <Reference Include="System.ServiceModel" />
    <Reference Include="System.Windows" />
    <Reference Include="system" />
    <Reference Include="System.Core" />
    <Reference Include="System.Net" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Windows.Browser" />
    <Reference Include="System.Xml.Linq, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
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  <ItemGroup>
    <Compile Include="App.xaml.cs">
      <DependentUpon>App.xaml</DependentUpon>
    </Compile>
    <Compile Include="ImageConverter.cs" />
    <Compile Include="MainPage.xaml.cs">
      <DependentUpon>MainPage.xaml</DependentUpon>
    </Compile>
    <Compile Include="Properties\AssemblyInfo.cs" />
    <Compile Include="TimestampConverter.cs" />
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    <ApplicationDefinition Include="App.xaml">
      <SubType>Designer</SubType>
      <Generator>MSBuild:Compile</Generator>
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    <Page Include="MainPage.xaml">
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      <Generator>MSBuild:Compile</Generator>
    </Page>
  </ItemGroup>
  <ItemGroup>
    <None Include="Properties\AppManifest.xml" />
  </ItemGroup>
  <ItemGroup>
    <Resource Include="snow.png" />
  </ItemGroup>
  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Silverlight\$(SilverlightVersion)\Microsoft.Silverlight.CSharp.targets" />
  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
       Other similar extension points exist, see Microsoft.Common.targets.
  <Target Name="BeforeBuild">
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  <Target Name="AfterBuild">
  </Target>
  -->
  <ProjectExtensions>
    <VisualStudio>
      <FlavorProperties GUID="{A1591282-1198-4647-A2B1-27E5FF5F6F3B}">
        <SilverlightProjectProperties />
      </FlavorProperties>
    </VisualStudio>
  </ProjectExtensions>
</Project>

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Architect Scott Logic
United Kingdom United Kingdom
I am CTO at ShinobiControls, a team of iOS developers who are carefully crafting iOS charts, grids and controls for making your applications awesome.

I am a Technical Architect for Visiblox which have developed the world's fastest WPF / Silverlight and WP7 charts.

I am also a Technical Evangelist at Scott Logic, a provider of bespoke financial software and consultancy for the retail and investment banking, stockbroking, asset management and hedge fund communities.

Visit my blog - Colin Eberhardt's Adventures in .NET.

Follow me on Twitter - @ColinEberhardt

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