diff --git "a/\351\231\206\346\273\242\351\222\260/20241223.md" "b/\351\231\206\346\273\242\351\222\260/20241223.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c2ee2fce924e53c5350abdb4c90e6dd8df1dea05
--- /dev/null
+++ "b/\351\231\206\346\273\242\351\222\260/20241223.md"
@@ -0,0 +1,36 @@
+## 学生表新增，编辑功能
+
+```
+[HttpPost]
+    public IActionResult Create(Student input)
+    {
+        _db.Students.Add(input);
+        _db.SaveChanges();
+        return RedirectToAction("Index");
+    }
+    public IActionResult Edit(int id)
+    {
+        var entity = _db.Students.FirstOrDefault(x => x.Id == id);
+        if (entity != null)
+        {
+            return View(entity);
+        }
+        return NotFound();
+    }
+    [HttpPost]
+    public IActionResult Edit(Student input)
+    {
+        var entity = _db.Students.FirstOrDefault(x => x.Id == input.Id);
+        if (entity != null)
+        {
+            entity.StudentCode = input.StudentCode;
+            entity.StudentName = input.StudentName;
+            entity.Age = input.Age;
+            _db.Students.Update(entity);
+            _db.SaveChanges();
+            // _db.SaveChangesAsync();
+            return RedirectToAction("Index");
+        }
+        return NotFound();
+    }
+```
\ No newline at end of file
diff --git "a/\351\231\206\346\273\242\351\222\260/20241225.md" "b/\351\231\206\346\273\242\351\222\260/20241225.md"
new file mode 100644
index 0000000000000000000000000000000000000000..85c2e02e9cc4a6446f3b1a853e964066e3a97b08
--- /dev/null
+++ "b/\351\231\206\346\273\242\351\222\260/20241225.md"
@@ -0,0 +1,24 @@
+## 学生表删除功能
+
+```
+public IActionResult Delete(int id)
+    {
+        var obj = _db.Students.FirstOrDefault(x => x.Id == id);
+        if (obj == null)
+        {
+            return NotFound();
+        }
+        return View(obj);
+    }
+    public IActionResult DeleteConfirm(int id)
+    {
+        var obj = _db.Students.FirstOrDefault(x => x.Id == id);
+        if (obj == null)
+        {
+            return NotFound();
+        }
+        _db.Students.Remove(obj);
+        _db.SaveChanges();
+        return RedirectToAction("Index");
+    }
+```
\ No newline at end of file
diff --git "a/\351\231\206\346\273\242\351\222\260/20241226.md" "b/\351\231\206\346\273\242\351\222\260/20241226.md"
new file mode 100644
index 0000000000000000000000000000000000000000..1d6ba1ecc292fe1b3dea5340df2d06f033ca50f4
--- /dev/null
+++ "b/\351\231\206\346\273\242\351\222\260/20241226.md"
@@ -0,0 +1,39 @@
+## 学生表查找功能
+
+```
+public IActionResult Index(string keyword)
+    {
+        // 2种情况
+        // 有查找有关键字
+        // 没有查找，也没有关键字（关键字为空的情况）
+
+        // 第一种
+        // IEnumerable<Student> list;
+        // if (string.IsNullOrEmpty(keyword))
+        // {
+        //     list = _db.Students;
+        // }
+        // else
+        // {
+        //     list = _db.Students.Where(x => x.StudentCode.Contains(keyword) || x.StudentName.Contains(keyword));
+        // }
+        // return View(list);
+
+        // 第二种
+        // if(string.IsNullOrEmpty(keyword))
+        // {
+        //     return View(_db.Students);
+        // }else{
+        //     var list=_db.Students.Where(x=>x.StudentCode.Contains(keyword) || x.StudentName.Contains(keyword));
+        //     return View(list);
+        // }
+
+        // 第三种
+        if (string.IsNullOrEmpty(keyword))
+        {
+            return View(_db.Students);
+        }
+        var list = _db.Students.Where(x => x.StudentCode.Contains(keyword) || x.StudentName.Contains(keyword));
+        return View(list);
+    }
+```
\ No newline at end of file