Add support for serializing List of dynamic or objects to CSV

Author: mythz

src/ServiceStack.Text/CsvWriter.cs

@@ -229,9 +229,10 @@ public static void Write(TextWriter writer, IEnumerable<T> records)
                 return;
             }
 
-            if (typeof(T) == typeof(Dictionary<string, object>))
+            if (typeof(T).IsAssignableFromType(typeof(Dictionary<string, object>)))
             {
-                CsvDictionaryWriter.Write(writer, (IEnumerable<Dictionary<string, object>>)records);
+                var dynamicList = records.Select(x => x.ToObjectDictionary()).ToList();
+                CsvDictionaryWriter.Write(writer, dynamicList);
                 return;
             }
 

src/ServiceStack.Text/ReflectionExtensions.cs

@@ -1685,6 +1685,25 @@ public static Type GetCollectionType(this Type type)
         {
             return type.ElementType() ?? type.GetTypeGenericArguments().FirstOrDefault();
         }
+
+        public static Dictionary<string, object> ToObjectDictionary<T>(this T obj)
+        {
+            var dict = new Dictionary<string, object>();
+            
+            foreach (var pi in obj.GetType().GetSerializableProperties())
+            {
+                dict[pi.Name] = pi.GetValue(obj, null);
+            }
+
+            if (JsConfig.IncludePublicFields)
+            {
+                foreach (var fi in obj.GetType().GetSerializableFields())
+                {
+                    dict[fi.Name] = fi.GetValue(obj);
+                }
+            }
+            return dict;
+        }
     }
 
 }

tests/ServiceStack.Text.Tests/CsvTypeTests.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using NUnit.Framework;
+
+namespace ServiceStack.Text.Tests
+{
+    [TestFixture]
+    public class CsvTypeTests
+    {
+        private int id = 0;
+        static string[] Names = new[] { "Foo", "Bar" };
+
+        object Create(string name)
+        {
+            return new { id = ++id, name = name };
+        }
+
+        [Test]
+        public void Can_serialize_Dynamic_List()
+        {
+            List<dynamic> rows = Names.Map(Create);
+            var csv = rows.ToCsv();
+            Assert.That(csv, Is.EqualTo("id,name\r\n1,Foo\r\n2,Bar\r\n"));
+        }
+
+        [Test]
+        public void Can_serialize_Dynamic_Objects()
+        {
+            List<object> rows = Names.Map(Create);
+            var csv = rows.ToCsv();
+            Assert.That(csv, Is.EqualTo("id,name\r\n1,Foo\r\n2,Bar\r\n"));
+        }
+    }
+}

tests/ServiceStack.Text.Tests/ServiceStack.Text.Tests.csproj

@@ -177,6 +177,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AttributeTests.cs" />
+    <Compile Include="CsvTypeTests.cs" />
     <Compile Include="JsonTests\JsonEnumTests.cs" />
     <Compile Include="JsonTests\InvalidJsonTests.cs" />
     <Compile Include="JsonTests\TypeInfoTests.cs" />