前言
在上一章节我们在后端框架中引入 SQLite-net ORM 并封装常用方法（SQLiteHelper），今天我们的任务是设计好班级管理相关的表、完善后端班级管理相关接口并对Swagger自定义配置。
EasySQLite 项目源码地址
班级管理相关的表设计
班级表的字段可以包括：
- 班级ID（ClassID）：用于唯一标识每个班级[主键自增]。
- 创建时间（CreateTime）：班级创建的时间。
班级学生表的字段可以包括：
- 学生ID（StudentID）：用于唯一标识每个学生[主键自增]。
- 班级ID（ClassID）：所属班级的ID，与班级表中的班级ID相关联。
班级管理相关的表对应模型
SchoolClass
public class SchoolClass
{
/// <summary>
/// 班级ID [主键，自动递增]
/// </summary>
[PrimaryKey, AutoIncrement]
public int ClassID { get; set; }
/// <summary>
/// 班级名称
/// </summary>
public string ClassName { get; set; }
/// <summary>
/// 创建时间
/// </summary>
public DateTime CreateTime { get; set; }
}
Student
public class Student
{
/// <summary>
/// 学生ID [主键，自动递增]
/// </summary>
[PrimaryKey, AutoIncrement]
public int StudentID { get; set; }
/// <summary>
/// 班级ID
/// </summary>
public int ClassID { get; set; }
/// <summary>
/// 学生姓名
/// </summary>
public string Name { get; set; }
/// <summary>
/// 学生年龄
/// </summary>
public int Age { get; set; }
/// <summary>
/// 学生性别
/// </summary>
public string Gender { get; set; }
}
接口统一的响应模型
为了实现统一的响应模型，这里创建一个名为 ApiResponse的泛型类。
public class ApiResponse<T>
{
/// <summary>
/// 是否成功
/// </summary>
public bool Success { get; set; }
/// <summary>
/// 响应消息
/// </summary>
public string Message { get; set; }
/// <summary>
/// 返回的数据
/// </summary>
public T Data { get; set; }
}
学校班级管理接口代码
/// <summary>
/// 学校班级管理
/// </summary>
[ApiController]
[Route("[controller]")]
public class SchoolClassController : ControllerBase
{
private readonly SQLiteAsyncHelper<SchoolClass> _schoolClassHelper;
/// <summary>
/// 依赖注入
/// </summary>
/// <param name="schoolClassHelper">schoolClassHelper</param>
public SchoolClassController(SQLiteAsyncHelper<SchoolClass> schoolClassHelper)
{
_schoolClassHelper = schoolClassHelper;
}
/// <summary>
/// 班级创建
/// </summary>
/// <param name="schoolClass">创建班级信息</param>
/// <returns></returns>
[HttpPost]
public async Task<ApiResponse<int>> CreateClass([FromBody] SchoolClass schoolClass)
{
try
{
int insertNumbers = await _schoolClassHelper.InsertAsync(schoolClass);
if (insertNumbers > 0)
{
return new ApiResponse<int>
{
Success = true,
Message = "创建班级成功"
};
}
else
{
return new ApiResponse<int>
{
Success = false,
Message = "创建班级失败"
};
}
}
catch (Exception ex)
{
return new ApiResponse<int>
{
Success = false,
Message = ex.Message
};
}
}
/// <summary>
/// 获取所有班级信息
/// </summary>
[HttpGet]
public async Task<ApiResponse<List<SchoolClass>>> GetClasses()
{
try
{
var classes = await _schoolClassHelper.QueryAllAsync().ConfigureAwait(false);
return new ApiResponse<List<SchoolClass>>
{
Success = true,
Data = classes
};
}
catch (Exception ex)
{
return new ApiResponse<List<SchoolClass>>
{
Success = false,
Message = ex.Message
};
}
}
/// <summary>
/// 根据班级ID获取班级信息
/// </summary>
/// <param name="classId">班级ID</param>
/// <returns></returns>
[HttpGet("{classId}")]
public async Task<ApiResponse<SchoolClass>> GetClass(int classId)
{
try
{
var schoolClass = await _schoolClassHelper.QuerySingleAsync(c => c.ClassID == classId).ConfigureAwait(false);
if (schoolClass != null)
{
return new ApiResponse<SchoolClass>
{
Success = true,
Data = schoolClass
};
}
else
{
return new ApiResponse<SchoolClass>
{
Success = false,
Message = "班级不存在"
};
}
}
catch (Exception ex)
{
return new ApiResponse<SchoolClass>
{
Success = false,
Message = ex.Message
};
}
}
/// <summary>
/// 更新班级信息
/// </summary>
/// <param name="classId">班级ID</param>
/// <param name="updatedClass">更新的班级信息</param>
/// <returns></returns>
[HttpPut("{classId}")]
public async Task<ApiResponse<int>> UpdateClass(int classId, [FromBody] SchoolClass updatedClass)
{
try
{
var existingClass = await _schoolClassHelper.QuerySingleAsync(c => c.ClassID == classId).ConfigureAwait(false);
if (existingClass != null)
{
existingClass.ClassName = updatedClass.ClassName;
var updateResult = await _schoolClassHelper.UpdateAsync(existingClass).ConfigureAwait(false);
if (updateResult > 0)
{
return new ApiResponse<int>
{
Success = true,
Message = "班级信息更新成功"
};
}
else
{
return new ApiResponse<int>
{
Success = false,
Message = "班级信息更新失败"
};
}
}
else
{
return new ApiResponse<int>
{
Success = false,
Message = "班级不存在"
};
}
}
catch (Exception ex)
{
return new ApiResponse<int>
{
Success = false,
Message = ex.Message
};
}
}
/// <summary>
/// 班级删除
/// </summary>
/// <param name="classId">班级ID</param>
/// <returns></returns>
[HttpDelete("{classId}")]
public async Task<ApiResponse<int>> DeleteClass(int classId)
{
try
{
var deleteResult = await _schoolClassHelper.DeleteAsync(classId).ConfigureAwait(false);
if (deleteResult > 0)
{
return new ApiResponse<int>
{
Success = true,
Message = "班级删除成功"
};
}
else
{
return new ApiResponse<int>
{
Success = true,
Message = "班级删除失败"
};
}
}
catch (Exception ex)
{
return new ApiResponse<int>
{
Success = false,
Message = ex.Message
};
}
}
}
学生管理接口代码
/// <summary>
/// 学生管理
/// </summary>
[ApiController]
[Route("[controller]")]
public class StudentController : ControllerBase
{
private readonly SQLiteAsyncHelper<Student> _studentHelper;
/// <summary>
/// 依赖注入
/// </summary>
/// <param name="studentHelper">studentHelper</param>
public StudentController(SQLiteAsyncHelper<Student> studentHelper)
{
_studentHelper = studentHelper;
}
/// <summary>
/// 创建新的学生记录
/// </summary>
/// <param name="student">添加的学生信息</param>
/// <returns></returns>
[HttpPost]
public async Task<ApiResponse<int>> CreateAsync([FromBody] Student student)
{
var response = new ApiResponse<int>();
try
{
var insertNumbers = await _studentHelper.InsertAsync(student).ConfigureAwait(false);
if (insertNumbers > 0)
{
response.Success = true;
response.Message = "添加成功";
}
else
{
response.Success = false;
response.Message = "插入失败";
}
}
catch (Exception ex)
{
response.Success = false;
response.Message = ex.Message;
}
return response;
}
/// <summary>
/// 查询所有学生记录
/// </summary>
/// <returns></returns>
[HttpGet]
public async Task<ApiResponse<List<Student>>> GetAllAsync()
{
var response = new ApiResponse<List<Student>>();
try
{
var students = await _studentHelper.QueryAllAsync().ConfigureAwait(false);
response.Success = true;
response.Data = students;
}
catch (Exception ex)
{
response.Success = false;
response.Message = ex.Message;
}
return response;
}
/// <summary>
/// 根据学生ID查询学生信息
/// </summary>
/// <param name="studentID">学生ID</param>
/// <returns></returns>
[HttpGet("{studentID}")]
public async Task<ApiResponse<Student>> GetByIdAsync(int studentID)
{
var response = new ApiResponse<Student>();
try
{
var student = await _studentHelper.QuerySingleAsync(x => x.StudentID == studentID).ConfigureAwait(false);
if (student != null)
{
response.Success = true;
response.Data = student;
}
else
{
response.Success = false;
response.Message = "未找到学生信息";
}
}
catch (Exception ex)
{
response.Success = false;
response.Message = ex.Message;
}
return response;
}
/// <summary>
/// 更新学生记录
/// </summary>
/// <param name="studentID">学生ID</param>
/// <param name="editstudent">更新的学生信息</param>
/// <returns></returns>
[HttpPut("{studentID}")]
public async Task<ApiResponse<int>> UpdateAsync(int studentID, [FromBody] Student editstudent)
{
var response = new ApiResponse<int>();
try
{
var student = await _studentHelper.QuerySingleAsync(x => x.StudentID == studentID).ConfigureAwait(false);
if (student != null)
{
student.Age = editstudent.Age;
student.Name = editstudent.Name;
student.Gender = editstudent.Gender;
student.ClassID = editstudent.ClassID;
int updateResult = await _studentHelper.UpdateAsync(student).ConfigureAwait(false);
if (updateResult > 0)
{
response.Success = true;
response.Message = "学生信息更新成功";
}
else
{
response.Success = false;
response.Message = "学生信息更新失败";
}
}
else
{
response.Success = false;
response.Message = "未找到学生信息";
}
}
catch (Exception ex)
{
response.Success = false;
response.Message = ex.Message;
}
return response;
}
/// <summary>
/// 删除学生记录
/// </summary>
/// <param name="studentID">学生ID</param>
/// <returns></returns>
[HttpDelete("{studentID}")]
public async Task<ApiResponse<int>> DeleteAsync(int studentID)
{
var response = new ApiResponse<int>();
try
{
int deleteResult = await _studentHelper.DeleteAsync(studentID).ConfigureAwait(false);
if (deleteResult > 0)
{
response.Success = true;
response.Message = "删除成功";
}
else
{
response.Success = false;
response.Message = "未找到学生信息";
}
}
catch (Exception ex)
{
response.Success = false;
response.Message = ex.Message;
}
return response;
}
}
对应服务注册
在Program.cs类中：
// 注册服务
builder.Services.AddScoped<SQLiteAsyncHelper<SchoolClass>>();
builder.Services.AddScoped<SQLiteAsyncHelper<Student>>();
Swagger自定义和扩展
Swagger 提供了为对象模型进行归档和自定义 UI 以匹配你的主题的选项。
传递给 AddSwaggerGen 方法的配置操作会添加诸如作者、许可证和说明的信息。在 Program.cs 中添加如下Swagger自定义配置：
// 添加Swagger服务
builder.Services.AddSwaggerGen(options =>
{
options.SwaggerDoc("v1", new OpenApiInfo
{
Title = "EasySQLite API",
Version = "V1",
Description = ".NET 8操作SQLite入门到实战",
Contact = new OpenApiContact
{
Name = "GitHub源码地址",
Url = new Uri("https://github.com/YSGStudyHards/EasySQLite")
}
});
// 获取xml文件名
var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
// 获取xml文件路径
var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
// 添加控制器层注释，true表示显示控制器注释
options.IncludeXmlComments(xmlPath, true);
// 对action的名称进行排序，如果有多个，就可以看见效果了
options.OrderActionsBy(o => o.RelativePath);
});
项目右键，选择属性，找到生成下面的输出选中生成包含API文档的文件，如下图所示：
注意：关于XML文档文件路径是需要你先勾选上面生成包含API文档的文件的时候运行项目才会生成该项目的XML文档，然后可以把生成的XML文档放到你想要放到的位置。
项目运行：
Swagger API调用效果展示
Navicat查看SQLite数据库表数据
注意本文我们的数据库和表都是由代码自动创建生成的，也就是在SQLiteAsyncHelper里面。
创建成功后的数据库：
Navicat查看数据库表数据
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