Added code for using dynamic placeholders with Sitecore MVC

.gitattributes

@@ -0,0 +1,13 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+*.cs     diff=csharp

.gitignore

@@ -0,0 +1,88 @@
+# Custom
+_Libraries/
+
+# MAC OS
+.DS_Store
+
+# Windows OS
+Thumbs.db
+
+# Visual Studio
+*.obj
+*.exe
+*.pdb
+*.user
+*.aps
+*.pch
+*.vspscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.cache
+*.ilk
+*.log
+*.o
+*.lo
+*.la
+*.al
+.libs
+*.so
+*.so.[0-9]*
+*.a
+*.pyc
+*.pyo
+*.rej
+*.Publish.xml
+*~
+.*.swp
+*.lib
+*.sbr
+*.sln.ide
+[Bb]in
+[Dd]ebug/
+[Rr]elease*/
+obj/
+_ReSharper*/
+[Tt]est[Rr]esult*
+BuiltFiles_*
+Code/packages/
+Source/packages/
+FakesAssemblies/
+
+# Dreamweaver
+_notes/
+
+# Sitecore
+TDS_Build/
+IconCache/
+_Deploy/
+T4RenderCache/
+*.csproj.sitecore
+
+# PHP/Web Storm
+.idea/
+
+# SASS
+.sass-cache/
+
+# Node Modules
+node_modules/
+node_modules/*
+
+# Compiled CSS
+_compiled-css/
+
+# Comiled JS
+_compiled-js/
+
+# Xcode
+build/*
+*.xcuserdatad
+
+# Eclipse
+
+# Flash Builder

Source/DynamicPlaceholders.Mvc.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DynamicPlaceholders.Mvc", "DynamicPlaceholders.Mvc\DynamicPlaceholders.Mvc.csproj", "{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Source/DynamicPlaceholders.Mvc/DynamicPlaceholders.Mvc.csproj

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{44B2E88A-FDFB-4671-BA1A-08BF35CAC6D0}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>DynamicPlaceholders.Mvc</RootNamespace>
+    <AssemblyName>DynamicPlaceholders.Mvc</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</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\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Sitecore.Mvc">
+      <HintPath>..\..\_Libraries\Sitecore.Mvc.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Web" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Extensions\SitecoreHelperExtensions.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.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">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

Source/DynamicPlaceholders.Mvc/Extensions/SitecoreHelperExtensions.cs

@@ -0,0 +1,21 @@
+using Sitecore.Mvc.Helpers;
+using Sitecore.Mvc.Presentation;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Web;
+
+namespace DynamicPlaceholders.Mvc.Extensions
+{
+	public static class SitecoreHelperExtensions
+	{
+		public static HtmlString DynamicPlaceholder(this SitecoreHelper helper, string placeholderName)
+		{
+			var currentRenderingId = RenderingContext.Current.Rendering.UniqueId;
+
+			return helper.Placeholder(string.Format("{0}_{1}", placeholderName, currentRenderingId));
+		}
+	}
+}

Source/DynamicPlaceholders.Mvc/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("DynamicPlaceholders.Mvc")]
+[assembly: AssemblyDescription("Allows for the creation of dynamic placeholders in Sitecore MVC")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Fortis Collections")]
+[assembly: AssemblyProduct("DynamicPlaceholders")]
+[assembly: AssemblyCopyright("Copyright ©  2015")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("5dcf1c1e-3606-4994-ab15-ff1159c41b71")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Source/DynamicPlaceholders.Mvc/app.config

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-5.2.2.0" newVersion="5.2.2.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>