现在 .NET 最小 API(Minimal API) 也可以自动帮你做“数据验证”了。意思就是——如果用户请求你的 API 时,传过来的参数不符合你规定的要求,比如某个字段必须有值、有最大长度、格式要对等等,框架可以自动帮你检查这些东西,不用你手动去写判断逻辑。
首先需要在项目文件中添加InterceptorsNamesapces:
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net10.0</TargetFramework>
<able>enable</able>
<ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>
<PropertyGroup>
<InterceptorsNamespaces>$(InterceptorsNamespaces);Microsoft.AspNetCore.Http.Validation.Generated</InterceptorsNamespaces>
</PropertyGroup>
</Project>
using Microsoft.AspNetCore.Http.Validation;
using Microsoft.AspNetCore.Mvc;
using System.ComponentModel.DataAnnotations;
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddValidation();
var app = builder.Build();
// DisableValidation无效化验证
app.MapGet("/person/{id}",
([Range(1, 10000, ErrorMessage = "id的范围在1~10000之间")] int id)
=> TypedResults.Ok(id)).DisableValidation();
//验证
app.MapPost("/person", ([Required(ErrorMessage = "姓名不能为空")] string name, [Range(0, 120, ErrorMessage = "年龄应该在0~120之间")] int age) =>
TypedResults.Ok($"{name},{age}"));
//嵌套验证
app.MapPost("/order", ([FromBody] Order order) =>
TypedResults.Ok($"{order.OrderNo},{order.Amount}"));
app.Run();
public class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
public class Order
{
[ ]
public string OrderNo { get; set; }
[ ]
public decimal Amount { get; set; }
[ ]
public User OrderUser { get; set; }
}
public class User
{
[ ]
public int UserID { get; set; }
[ ]
public string UserName { get; set; }
}
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