Added SOLID example

Accompanies blog post http://www.ipreferjim.com/?p=1200
jimschubert · Dec 9, 2014 · e70ff75 · e70ff75
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diff --git a/2014-12-08/SolidExample/SolidExample.sln b/2014-12-08/SolidExample/SolidExample.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}") = "SolidExample", "SolidExample\SolidExample.csproj", "{911E78F5-7543-4EB4-83D5-C037321C373A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{911E78F5-7543-4EB4-83D5-C037321C373A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{911E78F5-7543-4EB4-83D5-C037321C373A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{911E78F5-7543-4EB4-83D5-C037321C373A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{911E78F5-7543-4EB4-83D5-C037321C373A}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
diff --git a/2014-12-08/SolidExample/SolidExample/App.config b/2014-12-08/SolidExample/SolidExample/App.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+    </startup>
+</configuration>
diff --git a/2014-12-08/SolidExample/SolidExample/Cars.csv b/2014-12-08/SolidExample/SolidExample/Cars.csv
@@ -0,0 +1,6 @@
+Year,Make,Model,Description,Price
+1997,Ford,E350,"ac, abs, moon",3000.00
+1999,Chevy,"Venture ""Extended Edition""","",4900.00
+1999,Chevy,"Venture ""Extended Edition, Very Large""",,5000.00
+1996,Jeep,Grand Cherokee,"MUST SELL!
+air, moon roof, loaded",4799.00
diff --git a/2014-12-08/SolidExample/SolidExample/DataReaderStringIndexedWrapper.cs b/2014-12-08/SolidExample/SolidExample/DataReaderStringIndexedWrapper.cs
@@ -0,0 +1,31 @@
+using System.Data;
+
+namespace SolidExample
+{
+    /// <summary>
+    /// Wraps a DataRow record to provide a consistent indexer interface
+    /// </summary>
+    internal class DataRowStringIndexedWrapper : IStringIndexed
+    {
+        private readonly DataRow _row;
+
+        /// <summary>
+        /// Initializes a new instance of <see cref="DataRowStringIndexedWrapper"/>
+        /// </summary>
+        /// <param name="row"></param>
+        public DataRowStringIndexedWrapper(DataRow row)
+        {
+            _row = row;
+        }
+
+        #region IStringIndexed Members
+
+        /// <inheritdoc/>
+        object IStringIndexed.this[string key]
+        {
+            get { return _row[key]; }
+        }
+
+        #endregion
+    }
+}
diff --git a/2014-12-08/SolidExample/SolidExample/DataRecordStringIndexedWrapper.cs b/2014-12-08/SolidExample/SolidExample/DataRecordStringIndexedWrapper.cs
@@ -0,0 +1,31 @@
+using System.Data;
+
+namespace SolidExample
+{
+    /// <summary>
+    /// Wraps an IDataRecord record to provide a consistent indexer interface
+    /// </summary>
+    internal class DataRecordStringIndexedWrapper : IStringIndexed
+    {
+        private readonly IDataRecord _record;
+
+        /// <summary>
+        /// Initializes a new instance of <see cref="DataRecordStringIndexedWrapper"/>
+        /// </summary>
+        /// <param name="record">A record</param>
+        public DataRecordStringIndexedWrapper(IDataRecord record)
+        {
+            _record = record;
+        }
+
+        #region IStringIndexed Members
+
+        /// <inheritdoc/>
+        object IStringIndexed.this[string key]
+        {
+            get { return _record[key]; }
+        }
+
+        #endregion
+    }
+}
diff --git a/2014-12-08/SolidExample/SolidExample/IStringIndexed.cs b/2014-12-08/SolidExample/SolidExample/IStringIndexed.cs
@@ -0,0 +1,15 @@
+namespace SolidExample
+{
+    /// <summary>
+    /// A contract for instances that offer objects via keyed index
+    /// </summary>
+    public interface IStringIndexed
+    {
+        /// <summary>
+        /// An indexer by key
+        /// </summary>
+        /// <param name="key">A unique string-based key for accessing objects</param>
+        /// <returns>A found object at given <param name="key"></param></returns>
+        object this[string key] { get; }
+    }
+}
diff --git a/2014-12-08/SolidExample/SolidExample/Program.cs b/2014-12-08/SolidExample/SolidExample/Program.cs
@@ -0,0 +1,125 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Odbc;
+using System.Data.OleDb;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SolidExample
+{
+    class Program
+    {
+        private static string cnxTemplate = 
+            @"Driver={{Microsoft Text Driver (*.txt; *.csv)}};Dbq={0};Extensions=csv,txt";
+
+        static void Main(string[] args)
+        {
+            /** The Problem **/
+            Console.WriteLine("A standard DataReader:");
+            string connectionString = String.Format(cnxTemplate, Environment.CurrentDirectory);
+            using (var connection = new OdbcConnection(connectionString))
+            {
+                connection.Open();
+                using (var cmd = connection.CreateCommand())
+                {
+                    // csv from http://www.wikiwand.com/en/Comma-separated_values#/Example
+                    cmd.CommandText = "select * from Cars.csv";
+
+                    using (var reader = cmd.ExecuteReader())
+                    while (reader.Read())
+                    {
+                        OverloadedDumpRow(reader);
+                    }
+                }
+            }
+            Console.WriteLine();
+
+            Console.WriteLine("A standard DataSet example.");
+            using (var connection = new OdbcConnection(connectionString))
+            {
+                connection.Open();
+
+                var adapter = new OdbcDataAdapter("SELECT * FROM Cars.csv", connection);
+
+                DataSet ds = new DataSet("Temp");
+                adapter.Fill(ds);
+
+                foreach (DataRow row in ds.Tables[0].Rows)
+                {
+                    OverloadedDumpRow(row);
+                }
+            }
+            Console.WriteLine();
+
+            /** The Solution **/
+            Console.WriteLine("A wrapped DataReader (shared mapping function):");
+            using (var connection = new OdbcConnection(connectionString))
+            {
+                connection.Open();
+                using (var cmd = connection.CreateCommand())
+                {
+                    // csv from http://www.wikiwand.com/en/Comma-separated_values#/Example
+                    cmd.CommandText = "select * from Cars.csv";
+
+                    using (var reader = cmd.ExecuteReader())
+                    while (reader.Read())
+                    {
+                        DumpRow(new DataRecordStringIndexedWrapper(reader));
+                    }
+                }
+            }
+            Console.WriteLine();
+
+            Console.WriteLine("A wrapped DataSet example (shared mapping function).");
+            using (var connection = new OdbcConnection(connectionString))
+            {
+                connection.Open();
+
+                var adapter = new OdbcDataAdapter("SELECT * FROM Cars.csv", connection);
+
+                DataSet ds = new DataSet("Temp");
+                adapter.Fill(ds);
+
+                foreach (DataRow row in ds.Tables[0].Rows)
+                {
+                    DumpRow(new DataRowStringIndexedWrapper(row));
+                }
+            }
+
+            Console.ReadLine();
+        }
+
+        /// <summary>
+        /// Example function operatoring on a single instance implementing IDataRecord
+        /// </summary>
+        /// <param name="row"></param>
+        static void OverloadedDumpRow(IDataRecord row)
+        {
+            Console.WriteLine("A {0} {1} {2}",
+                            row["Year"], row["Make"], row["Model"]);
+        }
+
+        /// <summary>
+        /// A needlessly redundant method to achieve the same as IDataRecord version above
+        /// </summary>
+        /// <param name="row"></param>
+        static void OverloadedDumpRow(DataRow row)
+        {
+            Console.WriteLine("A {0} {1} {2}",
+                            row["Year"], row["Make"], row["Model"]);
+        }
+
+        /// <summary>
+        /// An adapter is created to implement a known interface.
+        /// </summary>
+        /// <param name="record"></param>
+        static void DumpRow(IStringIndexed record)
+        {
+            Console.WriteLine("A {0} {1} {2}",
+                            record["Year"], record["Make"], record["Model"]);
+        }
+    }
+}
diff --git a/2014-12-08/SolidExample/SolidExample/Properties/AssemblyInfo.cs b/2014-12-08/SolidExample/SolidExample/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("SolidExample")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("SolidExample")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[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("840bf2c0-b6e5-4dd8-8fd3-d8060d1228c8")]
+
+// 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")]
diff --git a/2014-12-08/SolidExample/SolidExample/SolidExample.csproj b/2014-12-08/SolidExample/SolidExample/SolidExample.csproj
@@ -0,0 +1,64 @@
+<?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>{911E78F5-7543-4EB4-83D5-C037321C373A}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>SolidExample</RootNamespace>
+    <AssemblyName>SolidExample</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <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' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <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="DataReaderStringIndexedWrapper.cs" />
+    <Compile Include="DataRecordStringIndexedWrapper.cs" />
+    <Compile Include="IStringIndexed.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+    <None Include="Cars.csv">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </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>