Configuration of WPFSampleDbContext Singleton

clodoalves · Jun 29, 2022 · e823e39 · e823e39
1 parent 5e45427
commit e823e39
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Showing 4 changed files with 27 additions and 16 deletions.
diff --git a/WPFSample/WPFSample.App/App.xaml.cs b/WPFSample/WPFSample.App/App.xaml.cs
@@ -32,11 +32,7 @@ protected override async void OnStartup(StartupEventArgs e)
         {
             base.OnStartup(e);
 
-            //criacao de banco de dados
-            using (var db = new WPFSampleDbContext())
-            {
-                await db.Database.EnsureCreatedAsync();
-            }
+            await WPFSampleDbContext.GetInstance().Database.EnsureCreatedAsync();
 
             new Bootstrapper().Run();
         }

diff --git a/WPFSample/WPFSample.Repository/Context/WPFSampleDbContext.cs b/WPFSample/WPFSample.Repository/Context/WPFSampleDbContext.cs
@@ -6,6 +6,13 @@ namespace WPFSample.Repository.Context
 {
     public class WPFSampleDbContext : DbContext, IDbContext
     {
+        private static WPFSampleDbContext _instance;
+
+        private WPFSampleDbContext()
+        {
+
+        }
+
         public DbSet<Product> Products { get; set; }
         public DbSet<ProductImage> ProductImages { get; set; }
 
@@ -19,5 +26,13 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
             modelBuilder.ApplyConfiguration(new ProductMap());
             modelBuilder.ApplyConfiguration(new ProductImageMap());
         }
+
+        public static WPFSampleDbContext GetInstance()
+        {
+            if (_instance == null)
+                _instance = new WPFSampleDbContext();
+
+            return _instance;
+        }
     }
 }
diff --git a/WPFSample/WPFSample.Repository/Implementation/ProductImageRepository.cs b/WPFSample/WPFSample.Repository/Implementation/ProductImageRepository.cs
@@ -5,14 +5,14 @@
 
 namespace WPFSample.Repository.Implementation
 {
-    public class ProductImageRepository: RepositoryBase<ProductImage>, IProductImageRepository
+    public class ProductImageRepository : RepositoryBase<ProductImage>, IProductImageRepository
     {
         public ProductImage GetFirstImage(int idProduct)
         {
-            using (var db = new WPFSampleDbContext())
-            {
-                return db.ProductImages.Where(p => p.ProductId == idProduct).FirstOrDefault();
-            }
+            //using (var db = new WPFSampleDbContext())
+            //{
+            return dbContext.ProductImages.Where(p => p.ProductId == idProduct).FirstOrDefault();
+            //}
         }
     }
 }
diff --git a/WPFSample/WPFSample.Repository/Implementation/RepositoryBase.cs b/WPFSample/WPFSample.Repository/Implementation/RepositoryBase.cs
@@ -7,10 +7,10 @@ namespace WPFSample.Repository.Implementation
 {
     public abstract class RepositoryBase<T> : IRepositoryBase<T> where T : class
     {
-        protected WPFSampleDbContext dbContext = new WPFSampleDbContext();
+        protected WPFSampleDbContext dbContext = WPFSampleDbContext.GetInstance();
         public void Add(T register)
         {
-            dbContext.Add(register);
+            dbContext.Add(register);                     
             dbContext.SaveChanges();
         }
 
@@ -22,11 +22,11 @@ public void Delete(T register)
 
         public IEnumerable<T> GetAll()
         {
-            //TODO: To find a way to refresh the global dbContext correctly
-            using (var dbContext = new WPFSampleDbContext())
-            {
+            //TODO: To find a way to refresh the class dbContext correctly
+            //using (var dbContext = new WPFSampleDbContext())
+            //{
                 return dbContext.Set<T>().ToList();
-            }
+            //}
         }
 
         public T GetById(int id)