diff --git "a/\345\206\257\345\271\277\346\201\272/20260119.md" "b/\345\206\257\345\271\277\346\201\272/20260119.md"
new file mode 100644
index 0000000000000000000000000000000000000000..a64287ebcee196da9c0ff415132fc8b963616622
--- /dev/null
+++ "b/\345\206\257\345\271\277\346\201\272/20260119.md"
@@ -0,0 +1,19 @@
+// 数据库链接
+
+using Microsoft.EntityFrameworkCore;
+namespace ProductsSystem.Models;
+public class AppDbContext : DbContext
+{
+    public DbSet<ProductsData> products { get; set; }
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        optionsBuilder.UseSqlite("Data Source=Data.db;");
+    }
+}
+
+    private readonly AppDbContext db;
+    public ProductController()
+    {
+        db = new AppDbContext();
+    }
+```
\ No newline at end of file
diff --git "a/\345\206\257\345\271\277\346\201\272/20260121.md" "b/\345\206\257\345\271\277\346\201\272/20260121.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c28405771c1cdd9a4fccbd810c71ebd5b4ddd953
--- /dev/null
+++ "b/\345\206\257\345\271\277\346\201\272/20260121.md"
@@ -0,0 +1,44 @@
+```C#
+// 功能实现
+    // 新增商品
+    public IActionResult Add()
+    {
+        return View();
+    }
+
+    [HttpPost]
+    public IActionResult AddSave(ProductsData product)
+    {
+        if (ModelState.IsValid)
+        {
+            db.products.Add(product);
+            db.SaveChanges();
+            return Redirect("/Product/Index");
+        }
+        return View(product);
+    }
+    // 编辑商品
+
+    public IActionResult Edit(int id)
+
+    {
+
+        var prooduct = db.products.Find(id);
+
+        return View(prooduct);
+
+    }
+
+    [HttpPost]
+    public IActionResult EditSave(ProductsData product)
+    {
+        if (ModelState.IsValid)
+        {
+            db.products.Update(product);
+            db.SaveChanges();
+            return Redirect("/Product/Index");
+        }
+        return View(product);
+
+    }
+```
\ No newline at end of file
diff --git "a/\345\206\257\345\271\277\346\201\272/20260122.md" "b/\345\206\257\345\271\277\346\201\272/20260122.md"
new file mode 100644
index 0000000000000000000000000000000000000000..3f67248718521478296248b18c18bf90fbe07222
--- /dev/null
+++ "b/\345\206\257\345\271\277\346\201\272/20260122.md"
@@ -0,0 +1,16 @@
+```C#
+    // 删除商品
+    public IActionResult Delete(int id)
+    {
+        var product = db.products.Find(id);
+        return View(product);
+    }
+    [HttpPost]
+    public IActionResult DeleteSave(int id)
+    {
+        var product = db.products.Find(id);
+        db.products.Remove(product);
+        db.SaveChanges();
+        return Redirect("/Product/Index");
+    }
+```
\ No newline at end of file
diff --git "a/\345\206\257\345\271\277\346\201\272/20260123.md" "b/\345\206\257\345\271\277\346\201\272/20260123.md"
new file mode 100644
index 0000000000000000000000000000000000000000..1bb0057eb0707237047fe9b526b63823f3e86552
--- /dev/null
+++ "b/\345\206\257\345\271\277\346\201\272/20260123.md"
@@ -0,0 +1,10 @@
+``` C#
+// 安装必要的NuGet包**
+dotnet add package Microsoft.EntityFrameworkCore.Sqlite
+dotnet add package Microsoft.EntityFrameworkCore.Design
+dotnet add package Microsoft.EntityFrameworkCore.Tools
+
+// 迁移创建
+dotnet ef migrations add InitialCreate
+dotnet ef database update TargetMigration
+```
\ No newline at end of file