From 9367ea540619e0226aa6c4281693d94f8caaafc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=86=E6=BB=A2=E9=92=B0?=
 <14091774+well-yes@user.noreply.gitee.com>
Date: Sun, 29 Dec 2024 19:15:49 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=B0=E7=82=B9=E4=BA=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../20241223.md"                              | 36 +++++++++++++++++
 .../20241225.md"                              | 24 ++++++++++++
 .../20241226.md"                              | 39 +++++++++++++++++++
 3 files changed, 99 insertions(+)
 create mode 100644 "\351\231\206\346\273\242\351\222\260/20241223.md"
 create mode 100644 "\351\231\206\346\273\242\351\222\260/20241225.md"
 create mode 100644 "\351\231\206\346\273\242\351\222\260/20241226.md"

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 0000000..c2ee2fc
--- /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 0000000..85c2e02
--- /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 0000000..1d6ba1e
--- /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
-- 
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