Entity Framework Basics

ASP.Net Core/EntityFrameworkBasics/Controllers/HomeController.cs

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+using Microsoft.AspNetCore.Mvc;
+using System.Linq;
+
+namespace EntityFrameworkBasics.Controllers
+{
+    public class HomeController : Controller
+    {
+        #region Protected Members
+
+        /// <summary>
+        /// The scoped Application context
+        /// </summary>
+        protected ApplicationDbContext mContext;
+
+        #endregion
+
+        #region Constructor
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        /// <param name="context">The injected context</param>
+        public HomeController(ApplicationDbContext context)
+        {
+            mContext = context;
+        }
+
+        #endregion
+
+        public IActionResult Index()
+        {
+            // Make sure we have the database
+            mContext.Database.EnsureCreated();
+
+            // If we have no settings already...
+            if (!mContext.Settings.Any())
+            {
+                // Add a new setting
+                mContext.Settings.Add(new SettingsDataModel
+                {
+                    Name = "BackgroundColor",
+                    Value = "Red"
+                });
+
+                // Check to show the new setting is currently only local and not in the database
+                var settingsLocally = mContext.Settings.Local.Count();
+                var settingsDatabase = mContext.Settings.Count();
+                var firstLocal = mContext.Settings.Local.FirstOrDefault();
+                var firstDatabase = mContext.Settings.FirstOrDefault();
+
+                // Commit setting to database
+                mContext.SaveChanges();
+
+                // Recheck to show its now in local and the actual database
+                settingsLocally = mContext.Settings.Local.Count();
+                settingsDatabase = mContext.Settings.Count();
+                firstLocal = mContext.Settings.Local.FirstOrDefault();
+                firstDatabase = mContext.Settings.FirstOrDefault();
+            }
+
+            return View();
+        }
+    }
+}