{"id":612,"date":"2023-09-17T08:59:01","date_gmt":"2023-09-17T14:59:01","guid":{"rendered":"https:\/\/kop.lat\/blog\/?p=612"},"modified":"2023-09-17T21:31:42","modified_gmt":"2023-09-18T03:31:42","slug":"asynchronous-post-controller-and-service-with-model-using-fluent-api-validation-in-c","status":"publish","type":"post","link":"https:\/\/kop.lat\/blog\/asynchronous-post-controller-and-service-with-model-using-fluent-api-validation-in-c\/","title":{"rendered":"Asynchronous POST Controller and Service with model (using fluent API) validation in C#"},"content":{"rendered":"\n

To implement an asynchronous POST method to save data to a database using Entity Framework with Fluent API validation in a C# .NET WebAPI, follow these steps:<\/p>\n\n\n\n

    \n
  1. Create a Model with Fluent API Validation:<\/strong> Define a model class that represents the data you want to save in the database. Additionally, use Fluent API to specify validation rules in your DbContext<\/code>.<\/li>\n<\/ol>\n\n\n\n
       public class MyEntity\n   {\n       public int Id { get; set; }\n       public string Name { get; set; }\n       public int Age { get; set; }\n       \/\/ Add other properties as needed\n   }<\/code><\/pre>\n\n\n\n
    In your DbContext<\/code>, configure Fluent API validation for the model:<\/p>\n\n\n\n
       using Microsoft.EntityFrameworkCore;\n\n   public class MyDbContext : DbContext\n   {\n       public MyDbContext(DbContextOptions<MyDbContext> options) : base(options)\n       {\n       }\n\n       public DbSet<MyEntity> MyEntities { get; set; }\n\n       protected override void OnModelCreating(ModelBuilder modelBuilder)\n       {\n           \/\/ Fluent API validation rules\n           modelBuilder.Entity<MyEntity>()\n               .Property(e => e.Name)\n               .IsRequired()\n               .HasMaxLength(50);\n       }\n   }<\/code><\/pre>\n\n\n\n
    This example specifies that the Name<\/code> property is required and has a maximum length of 50 characters.<\/p>\n\n\n\n
      \n
    1. Configure Database Connection:<\/strong> In your Startup.cs<\/code>, configure the database connection in the ConfigureServices<\/code> method:<\/li>\n<\/ol>\n\n\n\n
         public void ConfigureServices(IServiceCollection services)\n   {\n       services.AddDbContext<MyDbContext>(options =>\n           options.UseSqlServer(Configuration.GetConnectionString(\"DefaultConnection\")));\n\n       \/\/ Add other services and configurations...\n   }<\/code><\/pre>\n\n\n\n
      Ensure that you configure your database connection string in the appsettings.json<\/code> file.<\/p>\n\n\n\n
        \n
      1. Create a Service:<\/strong> Create a service that interacts with the database to save data asynchronously:<\/li>\n<\/ol>\n\n\n\n
           using System;\n   using System.Threading.Tasks;\n\n   public interface IMyService\n   {\n       Task<MyEntity> SaveDataAsync(MyEntity model);\n   }\n\n   public class MyService : IMyService\n   {\n       private readonly MyDbContext _dbContext;\n\n       public MyService(MyDbContext dbContext)\n       {\n           _dbContext = dbContext;\n       }\n\n       public async Task<MyEntity> SaveDataAsync(MyEntity model)\n       {\n           if (model == null)\n           {\n               throw new ArgumentNullException(nameof(model));\n           }\n\n           \/\/ Additional validation can be done here if needed\n\n           _dbContext.MyEntities.Add(model);\n           await _dbContext.SaveChangesAsync();\n           return model;\n       }\n   }<\/code><\/pre>\n\n\n\n
        In this service, you can add additional custom validation logic as needed before saving to the database.<\/p>\n\n\n\n
          \n
        1. Create a Controller:<\/strong> Create a controller that accepts asynchronous POST requests and uses the IMyService<\/code> to save data to the database:<\/li>\n<\/ol>\n\n\n\n
             using Microsoft.AspNetCore.Mvc;\n   using System;\n   using System.Threading.Tasks;\n\n   [Route(\"api\/[controller]\")]\n   [ApiController]\n   public class MyController : ControllerBase\n   {\n       private readonly IMyService _myService;\n\n       public MyController(IMyService myService)\n       {\n           _myService = myService;\n       }\n\n       [HttpPost]\n       public async Task<IActionResult> Post([FromBody] MyEntity model)\n       {\n           if (model == null)\n           {\n               return BadRequest(\"Invalid data\");\n           }\n\n           try\n           {\n               var savedEntity = await _myService.SaveDataAsync(model);\n               return Ok(savedEntity);\n           }\n           catch (ArgumentNullException ex)\n           {\n               return BadRequest(ex.Message);\n           }\n           catch (Exception ex)\n           {\n               \/\/ Handle other exceptions as needed\n               return StatusCode(500, \"An error occurred while saving data.\");\n           }\n       }\n   }<\/code><\/pre>\n\n\n\n
          Now, when you make an asynchronous POST request to “\/api\/my” with JSON data in the request body, the Post<\/code> method in the MyController<\/code> will receive the data, validate it using Fluent API validation rules and any additional custom validation, and then use the MyService<\/code> to save it to the database asynchronously using Entity Framework. Adjust the model, database context, and service logic according to your specific database schema and requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"
          To implement an asynchronous POST method to save data to a database using Entity Framework with Fluent API validation in a C# .NET WebAPI, follow these steps: In your DbContext, configure Fluent API validation for the model: This example specifies that the Name property is required and has a maximum length of 50 characters. Ensure […]<\/p>\n","protected":false},"author":1,"featured_media":475,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[41,1,51,12],"tags":[],"_links":{"self":[{"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/posts\/612"}],"collection":[{"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/comments?post=612"}],"version-history":[{"count":1,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/posts\/612\/revisions"}],"predecessor-version":[{"id":613,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/posts\/612\/revisions\/613"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/media\/475"}],"wp:attachment":[{"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/media?parent=612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/categories?post=612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kop.lat\/blog\/wp-json\/wp\/v2\/tags?post=612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}