ASP.NET Core列表增删改查
前置要求：
1. vue+element-plus实现前端静态页面
HelloWorld.vue
hello界面
add
delete
Edit
Delete
1.2 创建弹框组件app.vue
完善方法组件的代码：组件的引用，组件的传值prop，计算属性，事件监听、子触发父组件的事件
HelloWorld.vue
hello界面
add
delete
Edit
Delete
app.vue
作用：利用三元表达式，使用同一个组件展示不同的弹框内容
2、后端接口的创建与开发
安装nuget：sqlSugarCore
Program.cs
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.MapGet("/test", () =>//方法（"/路径",()=>{}）
{
return "ok";
});
app.Run();
创建Model->User.cs
using SqlSugar;
namespace WebApplication1.Model
{
public class User
{
[SugarColumn(IsPrimaryKey = true)]//使用sqlSugar：配置主键
public int Id { get; set; }
public string Name { get; set; }
public DateTime Date { get; set; }
public string Address { get; set; }
public int Order { get; set; }
}
}
创建Data->SqlSugarHelper.cs
using SqlSugar;
namespace WebApplication1.Data
{
public class SqlSugarHelper
{
public static SqlSugarScope Db = new SqlSugarScope(new ConnectionConfig()
{
ConnectionString= "Data Source=.;Initial Catalog=BookMS;Persist Security Info=True;User ID=sa;Password=123456;Trust Server Certificate=True",
DbType=DbType.SqlServer,//数据库类型
IsAutoCloseConnection=true,//不手动colse 自动关闭连接
},
db =>
{
db.Aop.OnLogExecuting = (sql, pars) =>
{
Console.WriteLine(sql);//输出sql返回的数据，不影响性能开发阶段可以使用
};
}
);
}
}
完善SqlSugarHelper.cs实现增删改查数据库的执行语句
using SqlSugar;
using System.Reflection;
using WebApplication1.Model;
namespace WebApplication1.Data
{
public class SqlSugarHelper
{
public static SqlSugarScope Db = new SqlSugarScope(new ConnectionConfig()
{
ConnectionString= "Data Source=.;Initial Catalog=BookMS;Persist Security Info=True;User ID=sa;Password=123456;Trust Server Certificate=True",
DbType=DbType.SqlServer,//数据库类型
IsAutoCloseConnection=true,//不手动colse 自动关闭连接
},
db =>
{
db.Aop.OnLogExecuting = (sql, pars) =>
{
Console.WriteLine(sql);//输出sql返回的数据，不影响性能开发阶段可以使用
};
});
///
/// 初始化数据库
///
/// ().ExecuteCommand();//清空数据
List list = new List();
for(int i = 1; i <= 5; i++)
{
list.Add(new User()
{
Id = Guid.NewGuid().ToString(),
Name="Tom"+i,
Date=DateTime.Now,
Address="北京路138号",
Order=i,
});
}
for (int i = 6; i <= 10; i++)
{
list.Add(new User()
{
Id = Guid.NewGuid().ToString(),
Name = "Tom" + i,
Date = DateTime.Now,
Address = "北京路138号",
Order = i,
});
}
for (int i = 11; i <= 30; i++)
{
list.Add(new User()
{
Id = Guid.NewGuid().ToString(),
Name = "Tom" + i,
Date = DateTime.Now,
Address = "北京路138号",
Order = i,
});
}
Db.Insertable(list).ExecuteCommand();
return "ok";
}
catch (Exception ex)
{
return ex.Message;
}
}
///
///1.读取用户列表
///
public static Result GetUsers(Model req)
{
Result result = new Result();
int total = 0;
result.Res = Db.Queryable()
.WhereIF(!string.IsNullOrEmpty(req.KeyWord), s => s.Name.Contains(req.KeyWord) || s.Address.Contains(req.KeyWord))//过滤数据
.OrderBy(s => s.Order)//排序
.ToOffsetPage(req.PageIndex, req.PageSize, ref total);//分页
result.Total = total;
return result;
}
///
///2.新增
///
public static bool Add(AddReq req)
{
User info =new User()
{
Id=Guid.NewGuid().ToString(),
Name = req.Name,
Date=req.Date,
Address=req.Address,
Order=req.Order
};
if (Db.Queryable().Any(p => p.Name == req.Name))
{
return false;
}
return Db.Insertable(info).ExecuteCommand()>0;
}
///
///3.编辑
///
public static bool Edit(User req)
{
User info =Db.Queryable().First(p=>p.Id==req.Id);
if (info == null)
{
return false;
}
info.Name = req.Name;
info.Date = req.Date;
info.Address = req.Address;
info.Order = req.Order;
return Db.Updateable(info).ExecuteCommand() > 0;//差不多是返回影响行数的意思
}
///
///4.删除方法（单个及批量都可以）
///
public static bool Del(string ids)
{
return Db.Ado.ExecuteCommand($"DELETE [User] WHERE Id IN({ids})")>0;
}
}
public class Model//分页
{
public string KeyWord { get; set; }
public int PageIndex { get; set; }
public int PageSize { get; set; }
public int Total { get; set; }
}
public class Result//结果
{
public int Total { get; set; }
public object Res { get; set; }
}
public class AddReq//添加的请求参数
{
//public string Id { get; set; }
public string Name { get; set; }
public DateTime Date { get; set; }
public string Address { get; set; }
public int Order { get; set; }
}
}
在Program.cs中追加代码实现网络请求
app.MapGet("/codefrist", () =>
{
return SqlSugarHelper.InitDateBase();
});
app.MapPost("/list", (Model req) =>
{
return SqlSugarHelper.GetUsers(req);
});
app.MapPost("/add", (AddReq req) =>
{
return SqlSugarHelper.Add(req);
});
app.MapPost("/edit", (User req) =>
{
return SqlSugarHelper.Edit(req);
});
app.MapDelete("/delete", (string ids) =>
{
return SqlSugarHelper.Del(ids);
});实现对数据库的增删改查
