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Articles / Programming Languages / C# 4.0

Silverlight DataTrigger is the Answer to View Model / MVVM Issues

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6 Nov 2010Ms-PL4 min read 138.9K   1.4K   54  
How using the Silverlight DataTrigger allows you to run a process and then raise another when using View Model (MVVM)
  • viewmodeltreecontrol2.zip
    • ViewModelTreeControl.sln
    • ViewModelTreeControl.Web
    • ViewModelTreeControl
      • App.xaml
      • App.xaml.cs
      • Assets
      • Bin
        • Debug
          • AppManifest.xaml
          • ar
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • bg
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • ca
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • cs
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • da
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • de
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • el
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • es
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • et
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • eu
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • fi
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • fr
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • he
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • hr
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • hu
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • id
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • it
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • ja
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • ko
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • lt
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • lv
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • Microsoft.Expression.Interactions.dll
          • Microsoft.Expression.Interactions.xml
          • ms
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • nl
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • no
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • pl
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • pt
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • pt-BR
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • ro
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • ru
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • sk
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • sl
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • sr-Cyrl-CS
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • sr-Latn-CS
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • sv
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • System.ComponentModel.DataAnnotations.dll
          • System.ComponentModel.DataAnnotations.xml
          • System.Windows.Controls.Data.dll
          • System.Windows.Controls.Data.Input.dll
          • System.Windows.Controls.Data.Input.xml
          • System.Windows.Controls.Data.xml
          • System.Windows.Controls.dll
          • System.Windows.Controls.Input.dll
          • System.Windows.Controls.Input.xml
          • System.Windows.Controls.Navigation.dll
          • System.Windows.Controls.Navigation.xml
          • System.Windows.Controls.xml
          • System.Windows.Data.dll
          • System.Windows.Data.xml
          • System.Windows.Interactivity.dll
          • System.Windows.Interactivity.xml
          • TestPage.html
          • th
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • tr
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • uk
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • vi
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.resources.dll
          • ViewModelTreeControl.dll
          • ViewModelTreeControl.xap
          • zh-Hans
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
          • zh-Hant
            • System.ComponentModel.DataAnnotations.resources.dll
            • System.Windows.Controls.Data.Input.resources.dll
            • System.Windows.Controls.Data.resources.dll
            • System.Windows.Controls.Input.resources.dll
            • System.Windows.Controls.Navigation.resources.dll
            • System.Windows.Controls.resources.dll
            • System.Windows.Data.resources.dll
        • Release
      • Classes
      • Controls
      • Images
        • backgroundshadow.png
        • backgroundtexture.png
      • MainPage.xaml
      • MainPage.xaml.cs
      • Properties
      • readme.txt
      • Unique Features of this Theme.txt
      • ViewModels
      • ViewModelTreeControl.csproj
      • ViewModelTreeControl.csproj.user
      • Views
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProductVersion>
    </ProductVersion>
    <SchemaVersion>2.0</SchemaVersion>
    <ProjectGuid>{7E4673F0-6D59-4D1B-8B89-3281A2BE5B3A}</ProjectGuid>
    <ProjectTypeGuids>{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>ViewModelTreeControl.Web</RootNamespace>
    <AssemblyName>ViewModelTreeControl.Web</AssemblyName>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
    <SilverlightApplicationList>{148FB8BE-0F1B-4EEA-92C1-2E6C3C48A636}|..\ViewModelTreeControl\ViewModelTreeControl.csproj|ClientBin|False</SilverlightApplicationList>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System.Web.DynamicData" />
    <Reference Include="System.Web.Entity" />
    <Reference Include="System.Web.ApplicationServices" />
    <Reference Include="System" />
    <Reference Include="System.Data" />
    <Reference Include="System.Core" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="System.Web.Extensions" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.Web" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Configuration" />
    <Reference Include="System.Web.Services" />
    <Reference Include="System.EnterpriseServices" />
  </ItemGroup>
  <ItemGroup>
    <Content Include="ClientBin\ViewModelTreeControl.xap" />
    <Content Include="Silverlight.js" />
    <Content Include="Default.aspx" />
    <Content Include="Web.config" />
    <Content Include="Web.Debug.config">
      <DependentUpon>Web.config</DependentUpon>
    </Content>
    <Content Include="Web.Release.config">
      <DependentUpon>Web.config</DependentUpon>
    </Content>
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs" />
  </ItemGroup>
  <ItemGroup />
  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" />
  <ProjectExtensions>
    <VisualStudio>
      <FlavorProperties GUID="{349c5851-65df-11da-9384-00065b846f21}">
        <WebProjectProperties>
          <UseIIS>False</UseIIS>
          <AutoAssignPort>True</AutoAssignPort>
          <DevelopmentServerPort>32648</DevelopmentServerPort>
          <DevelopmentServerVPath>/</DevelopmentServerVPath>
          <IISUrl>
          </IISUrl>
          <NTLMAuthentication>False</NTLMAuthentication>
          <UseCustomServer>False</UseCustomServer>
          <CustomServerUrl>
          </CustomServerUrl>
          <SaveServerSettingsInUserFile>False</SaveServerSettingsInUserFile>
        </WebProjectProperties>
      </FlavorProperties>
    </VisualStudio>
  </ProjectExtensions>
  <!-- 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">
  </Target>
  <Target Name="AfterBuild">
  </Target>
  -->
</Project>

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)


Written By
Software Developer (Senior) http://ADefWebserver.com
United States United States
Michael Washington is a Microsoft MVP. He is a ASP.NET and
C# programmer.
He is the founder of
AiHelpWebsite.com,
LightSwitchHelpWebsite.com, and
HoloLensHelpWebsite.com.

He has a son, Zachary and resides in Los Angeles with his wife Valerie.

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