From 33730e40aabbf2718fe0fccbc7db949bc603c4a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=9B=A6?= <2196258247@qq.com>
Date: Sun, 29 Dec 2024 19:31:28 +0800
Subject: [PATCH 1/4] =?UTF-8?q?20241223=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
... -\345\255\246\347\224\237\350\241\250.md" | 39 +++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 "\345\210\230\346\233\246/20241223 -\345\255\246\347\224\237\350\241\250.md"
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 0000000..c2d7177
--- /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;
+编辑-学生-@Model.StudentName
+```
+
+## 对我来说，暂时没用，但是先写上吧
+```cshtml
+@model IEnumerable;
+```
+
+```cs
+ViewBag["Title"]="ABc";
+```
\ No newline at end of file
--
Gitee
From 2712b62cb745f25060db1377444746ba56eb6927 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=9B=A6?= <2196258247@qq.com>
Date: Sun, 29 Dec 2024 19:33:51 +0800
Subject: [PATCH 2/4] =?UTF-8?q?20241225=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
...25 -\350\277\236\350\241\250\346\237\245\350\257\242.md" | 6 ++++++
1 file changed, 6 insertions(+)
create mode 100644 "\345\210\230\346\233\246/20241225 -\350\277\236\350\241\250\346\237\245\350\257\242.md"
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 0000000..deba231
--- /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
--
Gitee
From 4fed82ccc611d9ebdb54378fa760fc2bead817c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=9B=A6?= <2196258247@qq.com>
Date: Sun, 29 Dec 2024 19:34:49 +0800
Subject: [PATCH 3/4] =?UTF-8?q?20241226=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
.../20241226 -\346\210\220\347\273\251\350\241\250.md" | 0
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 "\345\210\230\346\233\246/20241226 -\346\210\220\347\273\251\350\241\250.md"
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 0000000..e69de29
--
Gitee
From 1b1e2a0ef6e5dbdb5476826627c87c27d8f06423 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=9B=A6?= <2196258247@qq.com>
Date: Sun, 29 Dec 2024 19:35:23 +0800
Subject: [PATCH 4/4] =?UTF-8?q?20241226=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
... -\346\210\220\347\273\251\350\241\250.md" | 29 +++++++++++++++++++
1 file changed, 29 insertions(+)
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"
index e69de29..1076e3c 100644
--- "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"
@@ -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();
+ }
+```
\ No newline at end of file
--
Gitee