From 8010f17bb05a66771d521303d29729ffc5db7fbf Mon Sep 17 00:00:00 2001
From: Michael L Perry <michael@qedcode.com>
Date: Sun, 12 Jan 2025 20:36:23 -0600
Subject: [PATCH 1/2] Notebook extension to render a collection as a table

---
 Jinaga.Notebooks/DataFrameExtensions.cs  | 57 ++++++++++++++++++++++++
 Jinaga.Notebooks/Jinaga.Notebooks.csproj |  1 +
 2 files changed, 58 insertions(+)
 create mode 100644 Jinaga.Notebooks/DataFrameExtensions.cs

diff --git a/Jinaga.Notebooks/DataFrameExtensions.cs b/Jinaga.Notebooks/DataFrameExtensions.cs
new file mode 100644
index 0000000..0aac959
--- /dev/null
+++ b/Jinaga.Notebooks/DataFrameExtensions.cs
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+using Microsoft.Data.Analysis;
+
+// Extension method to convert a list of objects into a DataFrame that the Notebook will display as a table.
+public static class DataFrameExtensions
+{
+    public static DataFrame AsTable<T>(this IEnumerable<T> source)
+    {
+        if (source == null)
+            throw new ArgumentNullException(nameof(source));
+
+        var dataFrame = new DataFrame();
+        var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
+
+        if (!properties.Any())
+            throw new InvalidOperationException($"Type {typeof(T).Name} has no public instance properties.");
+
+        // Create columns for each property
+        foreach (var prop in properties)
+        {
+            var propertyType = prop.PropertyType;
+            if (propertyType == typeof(string))
+            {
+                var values = source.Select(item => (string)prop.GetValue(item)).ToList();
+                dataFrame.Columns.Add(new StringDataFrameColumn(prop.Name, values));
+            }
+            else if (propertyType == typeof(int) || propertyType == typeof(int?))
+            {
+                var values = source.Select(item => (int?)prop.GetValue(item)).ToList();
+                dataFrame.Columns.Add(new Int32DataFrameColumn(prop.Name, values));
+            }
+            else if (propertyType == typeof(double) || propertyType == typeof(double?))
+            {
+                var values = source.Select(item => (double?)prop.GetValue(item)).ToList();
+                dataFrame.Columns.Add(new DoubleDataFrameColumn(prop.Name, values));
+            }
+            else if (propertyType == typeof(bool) || propertyType == typeof(bool?))
+            {
+                var values = source.Select(item => (bool?)prop.GetValue(item)).ToList();
+                dataFrame.Columns.Add(new BooleanDataFrameColumn(prop.Name, values));
+            }
+            else if (propertyType == typeof(DateTime) || propertyType == typeof(DateTime?))
+            {
+                var values = source.Select(item => (DateTime?)prop.GetValue(item)).ToList();
+                dataFrame.Columns.Add(new PrimitiveDataFrameColumn<DateTime>(prop.Name, values));
+            }
+            else
+                throw new NotSupportedException($"Property type {propertyType.Name} is not supported.");
+        }
+
+        return dataFrame;
+    }
+}
\ No newline at end of file
diff --git a/Jinaga.Notebooks/Jinaga.Notebooks.csproj b/Jinaga.Notebooks/Jinaga.Notebooks.csproj
index dd563f1..dbecca9 100644
--- a/Jinaga.Notebooks/Jinaga.Notebooks.csproj
+++ b/Jinaga.Notebooks/Jinaga.Notebooks.csproj
@@ -6,6 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Html.Abstractions" Version="2.2.0" />
+    <PackageReference Include="Microsoft.Data.Analysis" Version="0.22.0" />
   </ItemGroup>
 
   <ItemGroup>

From a1ee235468ae4cb8b2a3fa366d4ed233d09dec77 Mon Sep 17 00:00:00 2001
From: Michael L Perry <michael@qedcode.com>
Date: Sun, 12 Jan 2025 21:52:45 -0600
Subject: [PATCH 2/2] Move the extension to the Notebooks namespace

---
 Jinaga.Notebooks/DataFrameExtensions.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Jinaga.Notebooks/DataFrameExtensions.cs b/Jinaga.Notebooks/DataFrameExtensions.cs
index 0aac959..8c7924c 100644
--- a/Jinaga.Notebooks/DataFrameExtensions.cs
+++ b/Jinaga.Notebooks/DataFrameExtensions.cs
@@ -5,6 +5,8 @@
 
 using Microsoft.Data.Analysis;
 
+namespace Jinaga.Notebooks;
+
 // Extension method to convert a list of objects into a DataFrame that the Notebook will display as a table.
 public static class DataFrameExtensions
 {