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Date: Wed, 30 Aug 2023 19:51:39 +0800
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+# 使用 Visual Studio 2022 中的 .HTTP 文件
+
+## 注释
+
+以 # 或 // 开头的行是注释，当 Visual Studio 发送 HTTP 请求时，将忽略这些行。
+
+![Alt text](https://oss.xcode.me/notes/2023-08-30-13-52-55_553ef9ac.png)
+
+
+
+## 变量
+
+以 @ 开头的行使用语法 @VariableName=Value 定义变量。
+
+```http
+@hostname=localhost
+@port=44320
+GET https://{{hostname}}:{{port}}/weatherforecast
+```
+
+## 多个请求
+
+请求格式为：
+
+```http
+[<HTTP-verb>] <url> [<HTTP-version>]
+[<request-headers>]
+[<request-body>]
+```
+
+```http
+GET https://localhost:7220/weatherforecast
+
+###
+
+GET https://localhost:7220/weatherforecast?date=2023-05-11&location=98006
+
+###
+
+GET https://localhost:7220/weatherforecast HTTP/3
+
+###
+```
+
+## 请求标头
+
+```http
+GET https://localhost:7220/weatherforecast
+Date: Wed, 27 Apr 2023 07:28:00 GMT
+
+###
+
+GET https://localhost:7220/weatherforecast
+Cache-Control: max-age=604800
+Age: 100
+
+###
+```
+
+## 请求正文
+
+```http
+POST https://localhost:7220/weatherforecast
+Content-Type: application/json
+
+{
+  "date": "2023-05-11",
+  "location": "98006"
+}
+```
+
+## 使用模板创建 HTTP 文件
+
+1. 右键单击 ASP.NET Core 项目
+2. 添加>新建项
+3. ASP.NET Core>常规
+4. 选择 HTTP 文件，然后选择添加
+
+## 使用终结点资源管理器
+
+视图>其他窗口>终结点资源管理器
+
+## 定义一个 ef core dbcontext
+
+```csharp
+public class WeatherForecastContext : DbContext
+{
+    public WeatherForecastContext(DbContextOptions<WeatherForecastContext> options)
+        : base(options)
+    {
+    }
+
+    public DbSet<WeatherForecast> WeatherForecasts { get; set; }
+}
+```
+
+### 课程结尾的感谢
+