From b9baecda2f0d1742b32cec731314e7989b08d141 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BD=95=E7=B4=AB=E6=82=A6?= <3418489566@qq.com>
Date: Sun, 15 Dec 2024 20:53:37 +0800
Subject: [PATCH] zy

---
 ...346\215\256\345\272\223\344\270\216mvc.md" | 66 +++++++++++++++++++
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 create mode 100644 "\344\275\225\347\264\253\346\202\246/20241213-\346\225\260\346\215\256\345\272\223\344\270\216mvc.md"

diff --git "a/\344\275\225\347\264\253\346\202\246/20241213-\346\225\260\346\215\256\345\272\223\344\270\216mvc.md" "b/\344\275\225\347\264\253\346\202\246/20241213-\346\225\260\346\215\256\345\272\223\344\270\216mvc.md"
new file mode 100644
index 0000000..2ba7229
--- /dev/null
+++ "b/\344\275\225\347\264\253\346\202\246/20241213-\346\225\260\346\215\256\345\272\223\344\270\216mvc.md"
@@ -0,0 +1,66 @@
+## 先决条件
+.NET SDK
+## 创建新项目
+```
+dotnet new mvc -o Blog
+cd Blog
+```
+## 安装 Entity Framework Core
+为目标对象的 EF Core 数据库提供程序安装程序包
+
+dotnet add package Microsoft.EntityFrameworkCore.SqlServer
+## 创建模型
+```
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+
+public class BloggingContext : DbContext
+{
+    public DbSet<Blog> Blogs { get; set; }
+
+    <!-- public BloggingContext()
+    {
+        var folder = Environment.SpecialFolder.LocalApplicationData;
+        var path = Environment.GetFolderPath(folder);
+        DbPath = System.IO.Path.Join(path, "blogging.db");
+    } -->
+
+    // The following configures EF to create a Sqlite database file in the
+    // special "local" folder for your platform.
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {   
+        <!-- => options.UseSqlite($"Data Source={DbPath}"); -->
+        var connectionString = $"server=.\\SQLEXPRESS;database=Blog;uid=sa;pwd=123456;TrustServerCertificate=True;";
+        base.OnConfiguring(optionsBuilder);
+        optionsBuilder.UseSqlServer(connectionString);
+    }
+}
+
+public class Blog
+{
+    public int BlogId { get; set; }
+    public string Url { get; set; }
+
+    public List<Post> Posts { get; } = new();
+}
+
+public class Post
+{
+    public int PostId { get; set; }
+    public string Title { get; set; }
+    public string Content { get; set; }
+
+    public int BlogId { get; set; }
+    public Blog Blog { get; set; }
+}
+```
+## 创建数据库
+### 使用迁移创建数据库
+
+1. dotnet tool install --global dotnet-ef
+2. dotnet add package Microsoft.EntityFrameworkCore.Design
+3. dotnet ef migrations add InitialCreate
+4. dotnet ef database update
+
+migrations 命令为迁移搭建基架，以便为模型创建一组初始表。 database update 命令创建数据库并向其应用新的迁移。
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-- 
Gitee