diff --git "a/\345\210\230\346\233\246/20241223 -\345\255\246\347\224\237\350\241\250.md" "b/\345\210\230\346\233\246/20241223 -\345\255\246\347\224\237\350\241\250.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c2d7177162f82c9b9f82c3da46eeb62677c7ea55
--- /dev/null
+++ "b/\345\210\230\346\233\246/20241223 -\345\255\246\347\224\237\350\241\250.md"	
@@ -0,0 +1,39 @@
+## 使用迁移创建数据库
+1. dotnet add package Microsoft.EntityFrameworkCore.SqlServer
+2. dotnet tool install --global dotnet-ef
+3. dotnet add package Microsoft.EntityFrameworkCore.Design
+4. dotnet ef migrations add InitialCreate
+5. dotnet ef database update
+
+## 了解IEnumerable
+```
+         (可迭代,可遍历)
+    ----->IEnumerable<-----
+    |                      |
+    |                      |
+ ICollection            IQueryable 
+  (集合)                (linq,可查询)
+    |
+    |
+  IList
+  (集合)
+```
+## 出现405错误
+1. 参数类型出错
+2. method对不上
+
+## 或许更美观？
+在View中的cshtml中加
+```cshtml
+@model Student;
+<h2>编辑-学生-@Model.StudentName</h2>
+```
+
+## 对我来说，暂时没用，但是先写上吧
+```cshtml
+@model IEnumerable<Student>;
+```
+
+```cs
+ViewBag["Title"]="ABc";
+```
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diff --git "a/\345\210\230\346\233\246/20241225 -\350\277\236\350\241\250\346\237\245\350\257\242.md" "b/\345\210\230\346\233\246/20241225 -\350\277\236\350\241\250\346\237\245\350\257\242.md"
new file mode 100644
index 0000000000000000000000000000000000000000..deba231488804f4fa994cb0a2bb2f65abcabbf1a
--- /dev/null
+++ "b/\345\210\230\346\233\246/20241225 -\350\277\236\350\241\250\346\237\245\350\257\242.md"	
@@ -0,0 +1,6 @@
+1. 查询功能 method=get
+from表单中的name与传到控制台的string类型参数名字相同
+[FromQuery]==>查询字符串
+
+前 || 后  前对后不执行
+判断条件1 | 判断条件2  1执行成功会继续执行2
\ No newline at end of file
diff --git "a/\345\210\230\346\233\246/20241226 -\346\210\220\347\273\251\350\241\250.md" "b/\345\210\230\346\233\246/20241226 -\346\210\220\347\273\251\350\241\250.md"
new file mode 100644
index 0000000000000000000000000000000000000000..1076e3cf11e97a94c344aa6953e43f21d18d043f
--- /dev/null
+++ "b/\345\210\230\346\233\246/20241226 -\346\210\220\347\273\251\350\241\250.md"	
@@ -0,0 +1,29 @@
+### 成绩表linq查询
+```cs
+public IActionResult Index(string keyword)
+    {
+        var list = _db.Scores.ToList();
+        var stus = _db.Students.Where(x=>!x.IsDeleted).ToList();
+        var cours = _db.Courses.Where(x=>!x.IsDeleted).ToList();
+        var res = list.Select(x => {
+            var tmpStu = stus.FirstOrDefault(y=>y.Id==x.StudentId);
+            var tmpCourse = cours.FirstOrDefault(z=>z.Id==x.CourseId);
+            return new{
+                x.Id,
+                x.StudentId,
+                StudentName = tmpStu == null ? "" : tmpStu.StudentName,
+                x.CourseId,
+                CourseName = tmpCourse == null ? "默认课程" : tmpCourse.CourseName,
+                x.Score
+            };
+        });
+        return View(res);s
+        // keyword = string.IsNullOrEmpty(keyword) ? " ": keyword.Trim();
+        // if (string.IsNullOrEmpty(keyword))
+        // {
+        //     return View(_db.Scores.ToList());
+        // }
+        // keyword = keyword.Trim();
+        // var list = _db.Scores.Where( x => x.StudentId.ToString().Contains(keyword)).ToList();
+    }
+```
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