A json deserializer example

Projects/Json Deserialization/JsonDeserialization.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="packages\GHIElectronics.TinyCLR.Core.2.3.0.1000\build\net48\GHIElectronics.TinyCLR.Core.props" Condition="Exists('packages\GHIElectronics.TinyCLR.Core.2.3.0.1000\build\net48\GHIElectronics.TinyCLR.Core.props')" />
+  <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>{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>JsonDeserialization</RootNamespace>
+    <AssemblyName>JsonDeserialization</AssemblyName>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <ProjectTypeGuids>{A1948822-69DD-4150-919B-F3F42EFB71CC};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </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>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="GHIElectronics.TinyCLR.Data.Json, Version=2.3.0.1000, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>packages\GHIElectronics.TinyCLR.Data.Json.2.3.0.1000\lib\net48\GHIElectronics.TinyCLR.Data.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="GHIElectronics.TinyCLR.IO, Version=2.3.0.1000, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>packages\GHIElectronics.TinyCLR.IO.2.3.0.1000\lib\net48\GHIElectronics.TinyCLR.IO.dll</HintPath>
+    </Reference>
+    <Reference Include="GHIElectronics.TinyCLR.Native, Version=2.3.0.1000, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>packages\GHIElectronics.TinyCLR.Native.2.3.0.1000\lib\net48\GHIElectronics.TinyCLR.Native.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('packages\GHIElectronics.TinyCLR.Core.2.3.0.1000\build\net48\GHIElectronics.TinyCLR.Core.props')" Text="$([System.String]::Format('$(ErrorText)', 'packages\GHIElectronics.TinyCLR.Core.2.3.0.1000\build\net48\GHIElectronics.TinyCLR.Core.props'))" />
+  </Target>
+</Project>

Projects/Json Deserialization/JsonDeserialization.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35527.113 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "JsonDeserialization", "JsonDeserialization.csproj", "{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8D4CEC68-E37D-457C-ACE6-AABC60C4C049}.Release|Any CPU.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Projects/Json Deserialization/Program.cs

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+using System;
+using System.Collections;
+using System.Diagnostics;
+using System.Text;
+using System.Threading;
+
+using GHIElectronics.TinyCLR.Data.Json;
+using GHIElectronics.TinyCLR.Native;
+
+namespace JsonDeserialization
+{
+    internal class Program
+    {
+        // This text is a result of a call to : https://api.openweathermap.org/data/2.5/weather?lat=42.49&lon=83.11&appid={your api key here}
+        // Documented here : https://openweathermap.org/current
+        const string JsonText = "{\"coord\":{\"lon\":-83.11,\"lat\":42.49},\"weather\":[{\"id\":800,\"main\":\"Clear\",\"description\":\"clear sky\",\"icon\":\"01d\"}],\"base\":\"stations\",\"main\":{\"temp\":266.74,\"feels_like\":266.74,\"temp_min\":265.88,\"temp_max\":267.99,\"pressure\":1041,\"humidity\":62,\"sea_level\":1041,\"grnd_level\":1014},\"visibility\":10000,\"wind\":{\"speed\":1.03,\"deg\":0},\"clouds\":{\"all\":0},\"dt\":1734112973,\"sys\":{\"type\":2,\"id\":2043784,\"country\":\"US\",\"sunrise\":1734094446,\"sunset\":1734127192},\"timezone\":-18000,\"id\":5000500,\"name\":\"Madison Heights\",\"cod\":200}";
+
+#pragma warning disable IDE1006 // Naming Styles - properties that start with lower case letter
+
+        internal class OwxCoordinates {
+            public float lon { get; set; }
+            public float lat { get; set; }
+        }
+
+        internal class OwxWeather {
+            public uint id { get; set; }
+            public string name { get; set; }
+            public string description { get; set; }
+            public string icon { get; set; }
+        }
+
+        internal class OwxMain {
+            public float temp { get; set; }
+            public float feels_like { get; set; }
+            public float temp_min { get; set; }
+            public float temp_max { get; set; }
+            public uint pressure { get; set; }
+            public uint humidity { get; set; }
+            public uint sea_level { get; set; }
+            public uint grnd_level { get; set; }
+        }
+
+        internal class OwxWind {
+            public float speed { get; set; }
+            public int deg { get; set; }
+        }
+
+        internal class OwxSys {
+            public int type { get; set; }
+            public uint id { get; set; }
+            public string country { get; set; }
+            public uint sunrise { get; set; }
+            public uint sunset { get; set; }
+        }
+
+        internal class OpenWeatherReport {
+            public OwxCoordinates coord { get; set; }
+            public OwxWeather[] weather { get; set; }
+            public string @base { get; set; }
+            public OwxMain main { get; set; }
+            public uint visibility { get; set; }
+            public OwxWind wind { get; set; }
+            public ulong dt { get; set; }
+            public OwxSys sys { get; set; }
+            public int timezone { get; set; }
+            public uint id { get; set; }
+            public string name { get; set; }
+            public uint cod { get; set; }
+        }
+#pragma warning restore IDE1006 //  Naming Styles - properties that start with lower case letter
+
+        /// <summary>
+        /// Because TinyCLR doesn't give us enough type information about arrays, we have to have a
+        /// helper function that will instantiate the array and each member in the array. We will get
+        /// called for every type being instantiated, but we only have to return instances for arrays
+        /// and members in arrays, though you could also use this to return child types for polymorphic
+        /// members of classes.
+        /// </summary>
+        /// <param name="path">The full json path to the member being created.</param>
+        /// <param name="root">The root token for the json currently being deserialized. You could inspect this to pull
+        /// out dynamic information (e.g., structures not known at compile time)
+        /// <param name="baseType">The type of the object we are deserializing into. This will be null when instantiating
+        /// the individual elements of an array, so you must use the path to decide what type of element to instantiate.</param>
+        /// <param name="name">not used</param>
+        /// <param name="length">When instantiating arrays, this will be the number of elements we need to allocate.</param>
+        /// <returns></returns>
+        private static object WxCreateInstance(string path, JToken root, Type baseType, string name, int length) {
+            // A little debug output to help you with decoding your own types...
+            if (baseType != null) {
+                Debug.Write("Base type = " + baseType.FullName + "  ");
+            }
+            Debug.WriteLine("Path = " + path + "  Name = " + name + "  Length = " + length);
+
+            // Allocate arrays and members of arrays (we can ignore all other cases and return null)
+            switch (path) {
+                case "/":
+                    switch (name) {
+                        case "weather":
+                            // The 'weather' element at the root of the json is an array. Allocate the
+                            // array space. Length will be >= 0
+                            return new OwxWeather[length];
+                    }
+                    break;
+                case "//weather":
+                    // This is asking us to allocate a single element to store in the 'weather' array
+                    // at the root of the json tree. Length will be -1 and the baseType will be null.
+                    // If TinyCLR would tell us the baseType, we wouldn't need this CreateInstance routine
+                    // at all, but this issue dates back to the origin of netMF.
+                    return new OwxWeather();
+            }
+            return null;
+        }
+
+        static void Main() {
+            var weather = (OpenWeatherReport)JsonConverter.DeserializeObject(JsonText, typeof(OpenWeatherReport), WxCreateInstance);
+            Debug.WriteLine("Current Temperature (K) is " + weather.main.temp + " but it feels like " + weather.main.feels_like);
+        }
+    }
+}

Projects/Json Deserialization/Properties/AssemblyInfo.cs

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+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("JsonDeserialization")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("JsonDeserialization")]
+[assembly: AssemblyCopyright("Copyright ©  2024")]
+[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("8d4cec68-e37d-457c-ace6-aabc60c4c049")]
+
+// 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")]

Projects/Json Deserialization/packages.config

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+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="GHIElectronics.TinyCLR.Core" version="2.3.0.1000" targetFramework="net48" />
+  <package id="GHIElectronics.TinyCLR.Data.Json" version="2.3.0.1000" targetFramework="net48" />
+  <package id="GHIElectronics.TinyCLR.IO" version="2.3.0.1000" targetFramework="net48" />
+  <package id="GHIElectronics.TinyCLR.Native" version="2.3.0.1000" targetFramework="net48" />
+</packages>