When I am passing a single object like below then it is working as per below image
[HttpPost]
public async Task<ActionResult> Post([FromForm] MyModel Details)
{
}
but when I am passing the List of the object to API then it is not working. option to upload a file is not visible. and if I entered any values in the array then also I am getting count 0 for details.
[HttpPost]
public async Task<ActionResult> Post([FromForm] List<MyModel> Details)
{}
I want to pass the List of images and descriptions to API. How can I achieve it?
Thanks in advance!
You need custom model binding for the list model . Here is a similar demo:
custom model binding code:
public class MetadataValueModelBinder : IModelBinder
{
public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
throw new ArgumentNullException(nameof(bindingContext));
var values = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
if (values.Length == 0)
return Task.CompletedTask;
var options = new JsonSerializerOptions() { PropertyNameCaseInsensitive = true };
var deserialized = JsonSerializer.Deserialize(values.FirstValue, bindingContext.ModelType, options);
bindingContext.Result = ModelBindingResult.Success(deserialized);
return Task.CompletedTask;
}
}
Add the model binder to the model class:
public class MasterDTO
{
public string Comments { get; set; }
public IFormFile File { get; set; }
public List<DetailDTO> Details { get; set; }
public MasterDTO()
{
this.Details = new List<DetailDTO>();
}
}
[ModelBinder(BinderType = typeof(MetadataValueModelBinder))]
public class DetailDTO
{
public Int64 ElementId { get; set; }
public double LowerLimit { get; set; }
public double HigherLimit { get; set; }
public string Status { get; set; }
public string UserAuthorization { get; set; }
public DateTime? AutorizationDate { get; set; }
}
controller/action
[HttpPost]
public async Task<IActionResult> CreateProjectLimit([FromForm] MasterDTO masterDto)
{
//...
return Ok();
}
You can just use postman to pass the list of images and Descriptions to API
Below is the right answer. we can use Postman to pass images in the array as shown below.
Related
I have a model contains list of another model and using master detail report, i want to get report from it using stimulsoft.The view model is:
using System.Collections.Generic;
namespace KimiaBaseProject.Core.ViewModels.Professors
{
public class ProfessorsWithProvidedCoursesForReportVm
{
public string ProfFName { get; set; }
public string ProfLName { get; set; }
public string ProfNCode { get; set; }
public List<ProfProvidedCourses> ProfProvidedCourses;
}
}
and
namespace KimiaBaseProject.Core.ViewModels.Professors
{
public class ProfProvidedCourses
{
public string CourseName { get; set; }
public string Day { get; set; }
public string StartHourr { get; set; }
public string EndHour { get; set; }
}
}
the code i have written to provide data to the report is:
public ActionResult Report()
{
return View();
}
public ActionResult LoadReportSnapshot()
{
//Make data ready
var data = _queryRepository.GetListAsIQueryable();
var mappeddata = data.ProjectTo<ProfessorsWithProvidedCoursesForReportVm>(_mapper.ConfigurationProvider).ToList();
//Load report and register data in it
StiReport report = new StiReport();
report.Load("./wwwroot/Reports/ReportStimul.mrt");
report.RegBusinessObject("ProfInfo_Parent", mappeddata);
report.Dictionary.SynchronizeBusinessObjects();
return StiNetCoreViewer.GetReportResult(this, report);
}
public ActionResult PrintReport()
{
return StiNetCoreViewer.PrintReportResult(this);
}
public ActionResult ExportReport()
{
return StiNetCoreViewer.ExportReportResult(this);
}
and the Report.cshtml file is
#using Stimulsoft.Report.Mvc
#model ProvidedCourseReportVm
#Html.StiNetCoreViewer((new StiNetCoreViewerOptions(){
Actions = {
GetReport="LoadReportSnapshot",
ViewerEvent="ViewEvent",
ExportReport="ExportReport",
PrintReport="PrintReport"
}
}))
the structure of ReportStimul.mrt is
enter image description here
and in the report result, just the master data is shown.
In ReportStimul.mrt I also specified the databand1 as master component of databand2 but it didn't work.
Is there a way to centralise the model validation of the same property name across multiple DTOs?
For example, if I have the following classes to be used as the request body in a Web API action.
public class RegisterRequest
{
[Required]
[EmailAddress]
public string EmailAddress { get; set; } = null!;
[Required]
[MinLength(8)]
[RegularExpression(UserSettings.PasswordRegex)]
public string Password { get; set; } = null!;
[Required]
[MaxLength(100)]
public string DisplayName { get; set; } = null!;
}
public class UserProfileRequest
{
[Required]
public int UserId { get; set; }
[Required]
[MaxLength(100)]
public string DisplayName { get; set; } = null!;
[Range(3, 3)]
public string? CCN3 { get; set; }
}
Can I centralise the attribute validation on DisplayName, duplicating the attributes goes against single responsibility principle. I believe I could achieve the centralised validation using an IFilterFactory and dropping the usage of attributes.
I opted to use a custom ActionFilterAttribute to achieve centralisation of the validation. The example below is for validating the country code (CCN3).
CountryCodeValidationAttribute.cs - custom attribute to be applied to properties (contains no logic)
[AttributeUsage(AttributeTargets.Property)]
public class CountryCodeValidationAttribute : Attribute
{
}
CountryCodeValidationActionFilter.cs - custom action filter that supports dependency injection and looks for the custom attribute on the properties. In my case I'm returning the standard invalid model bad request response.
public class CountryCodeValidationActionFilter : ActionFilterAttribute
{
private readonly ICountryService countryService;
private readonly IOptions<ApiBehaviorOptions> apiBehaviorOptions;
public CountryCodeValidationActionFilter(
ICountryService countryService,
IOptions<ApiBehaviorOptions> apiBehaviorOptions)
{
this.countryService = countryService;
this.apiBehaviorOptions = apiBehaviorOptions;
}
public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
var actionArguments = context.ActionArguments;
foreach (var actionArgument in actionArguments)
{
if (actionArgument.Value == null) continue;
var propertiesWithAttributes = actionArgument.Value
.GetType()
.GetProperties()
.Where(x => x.GetCustomAttributes(true).Any(y => y.GetType() == typeof(CountryCodeValidationAttribute)))
.ToList();
foreach (var property in propertiesWithAttributes)
{
var value = property.GetValue(actionArgument.Value)?.ToString();
if (value != null && await countryService.GetCountryAsync(value) != null) await next();
else
{
context.ModelState.AddModelError(property.Name, "Must be a valid country code");
context.Result = apiBehaviorOptions.Value.InvalidModelStateResponseFactory(context);
}
}
}
await base.OnActionExecutionAsync(context, next);
}
}
Program.cs - register the custom action filter.
builder.Services.AddMvc(options =>
{
options.Filters.Add(typeof(CountryCodeValidationActionFilter));
});
UserProfile.cs - apply the [CountryCodeValidation] attribute to the CountryCode property.
public class UserProfile
{
[Required]
[MaxLength(100)]
public string DisplayName { get; set; } = null!;
[CountryCodeValidation]
public string? CountryCode { get; set; }
}
I can take this same approach and apply it to the DisplayName property to create a centralised validation for it 👍.
I'm trying to update an entity using entity framework but, everytime I try to do it, it raises an error saying that a nested entity the main class contains cannot be tracked.
These are my classes:
public abstract class BaseEntity
{
public int Id { get; set; }
}
public class Dashboard : BaseEntity
{
public int Order { get; set; }
public string Title { get; set; }
public bool Enabled { get; set; }
public virtual ICollection<Submenu> Submenu { get; set; }
}
public class Submenu : BaseEntity
{
public int Order { get; set; }
public bool Enabled { get; set; }
public string Title { get; set; }
public string Image { get; set; }
public string Descriptions { get; set; }
public virtual ICollection<Action> Actions { get; set; }
public int DashboardId { get; set; }
public virtual Dashboard Dashboard { get; set; }
}
public class Action : BaseEntity
{
public string Type { get; set; }
public string Label { get; set; }
public string Url { get; set; }
public string Extension { get; set; }
public virtual Submenu Submenu { get; set; }
public int SubmenuId { get; set; }
}
The one I am using to update is Dashboard, which contains the rest of the classes.
I'm trying to do it using a generic service layer and a generic repository that are defined this way:
public class GenericService<T> : IGenericService<T> where T : BaseEntity
{
private readonly IBaseRepository<T> baseRepository;
public GenericService(IBaseRepository<T> baseRepository)
{
this.baseRepository = baseRepository;
}
public async Task Update(T entity, T attachedEntity)
{
await baseRepository.Update(entity, attachedEntity);
}
}
public class BaseRepository<T> : IBaseRepository<T> where T : BaseEntity
{
private readonly PortalContext dataContext;
private DbSet<T> DbSet { get; set; }
public BaseRepository(PortalContext context)
{
dataContext = context;
DbSet = dataContext.Set<T>();
}
public async Task Update(T entity, T attachedEntity)
{
dataContext.Entry(attachedEntity).State = EntityState.Detached;
DbSet.Attach(entity);
dataContext.Entry(entity).State = EntityState.Modified;
await dataContext.SaveChangesAsync();
}
}
And, at last but no least, this is the way I am configuring everything at Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<PortalContext>(
options => options.UseSqlServer(Configuration.GetConnectionString("PortalContext"))
);
services.AddTransient(typeof(IGenericService<>), typeof(GenericService<>));
services.AddTransient(typeof(IBaseRepository<>), typeof(BaseRepository<>));
services.AddTransient<Func<string, ClaimsPrincipal, IRoleCheck>>((serviceProvider) =>
{
return (controllerName, claimsPrincipal) =>
new RoleCheck(serviceProvider.GetRequiredService<IGenericService<Dossier>>(),
serviceProvider.GetRequiredService<IGenericService<DossierTemplate>>(),
serviceProvider.GetRequiredService<IGenericService<Dashboard>>(),
controllerName, claimsPrincipal);
});
}
What the application first does is calling the RoleCheck class to retrieve and filter the required entities and, after that, the user can update them.
When I call the update function at the controller
public async Task<ActionResult<Dashboard>> Put(int id, [FromBody] Dashboard dashboard)
{
var currentDashboard = await service.Get(id);
if (currentDashboard == null)
{
return NotFound();
}
await service.Update(dashboard, currentDashboard);
return Ok();
}
I always receive the next error at the repository:
error
Is there something I am doing wrong? I have been stuck with this for a week now...
Thanks in advance and sorry for the long text, but I wanted it to be clear.
I could finally solve it by adding .AsNoTracking() at the Get() method of my repository:
public async Task<T> Get(int id, Func<IQueryable<T>, IIncludableQueryable<T, object>> includes)
{
IQueryable <T> query = DbSet.AsNoTracking();
if (includes != null)
{
query = includes(query);
}
return await query.FirstOrDefaultAsync(m => m.Id == id);
}
i am trying to setup a blazor server app, calling a webapi.
I keep getting a 400 error returned, when I call the API.
I have 3 Projects, projectserver and projectapi. projectserver is where the Blazor app sits and Project API is where the API sits.
I don't know if the apicall can find the API as it does not hit any breakpoints in the API section, I am totally confused, as if it cannot find the API then it should return a 404 or other error and not 400 ?
thank you for your efforts.
this is my code,
Projectserver, this is where I post the Register Model to the API
public string message { get; set; }
public RegisterModel r = new RegisterModel();
private async Task Create(MouseEventArgs e)
{
var json = Newtonsoft.Json.JsonConvert.SerializeObject(r);
var client = clientfactory.CreateClient("ServerApi");
var result = await client.PostAsJsonAsync("/Account/Register",json); // check the Startup file and check base address for the Full route.
message = result.StatusCode.ToString();
}
}
the ClientFactory returns the base address of what is defined in startup.cs
services.AddHttpClient("ServerApi", client => client.BaseAddress = new Uri("https://localhost:44302/"));
the API is Projectserver and defined as follows.
[Route("[controller]")]
[ApiController]
public class AccountContoller : ControllerBase
{
private readonly ApplicationDbContext _context;
private readonly SecurityOptions _securityOptions;
private readonly JwtIssuerOptions _jwtOptions;
// GET: api/<Account>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
// GET api/<Account>/5
[HttpGet("{id}")]
public string Get(int id)
{
return "value";
}
// POST api/<Account>
[HttpPost]
public void Post([FromBody] string value)
{
}
// POST api/<Account>
[HttpPost("Register")]
public async Task<ActionResult<RegisterResult>> Register(RegisterModel model)
{
RegisterResult r = new RegisterResult();
var Exisits = await _context.Users.Where(r => r.EmailAddress == model.Email).FirstOrDefaultAsync();
if(Exisits != null)
{
r.Sucsess = false;
r.ErrorMessage = "Email - Already Exisits";
return r;
}
else
{
try
{
User newuser = new User();
newuser.CreatedDateTime = DateTime.UtcNow;
newuser.UserID = Guid.NewGuid();
newuser.MobileNumber = model.MobileNumber;
newuser.Password = model.Password;
newuser.FirstName = model.FirstName;
newuser.Surname = model.LastName;
_context.Users.Add(newuser);
await _context.SaveChangesAsync();
r.Sucsess = true;
return r;
}
catch(Exception e)
{
r.Sucsess = false;
r.ErrorMessage = e.ToString();
return r;
}
}
}
the Model classes are defined as Serializable
[Serializable]
public class RegisterResult
{
public bool Sucsess { get; set; }
public string ErrorMessage { get; set; }
}
[Serializable]
public class RegisterModel
{
public string UserName { get; set; }
public string Password { get; set; }
public string Email { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string RoleID { get; set; }
public string EntityID { get; set; }
public string MobileNumber { get; set; }
}
Can you please modify your code as below and give it a try:-
var serializedBody = JsonConvert.SerializeObject(r);
var jsonRequestBodyContent = new StringContent(serializedBody, Encoding.UTF8,"application/json");
var client = clientfactory.CreateClient("ServerApi");
var result = await client.PostAsync("/Account/Register",jsonRequestBodyContent);
I am new to .Net Core development. I have a model:
public class CoreGoal
{
[Key]
public long CoreGoalId { get; set; }
public string Title { get; set; }
public string Effect { get; set; }
public string Target_Audience { get; set; }
public string Infrastructure { get; set; }
public virtual ICollection<Image> Images { get; set; }
public CoreGoal()
{
}
}
And Image model is as following:
public class Image
{
[Key]
public long ImagelId { get; set; }
public string Base64 { get; set; }
[ForeignKey("CoreGoalId")]
public long CoreGoalId { get; set; }
public Image()
{
}
}
I am using Repository pattern. My repository:
public interface ICoreGoalRepository
{
void CreateCoreGoal(CoreGoal coreGoal);
}
public class CoreGoalRepository : ICoreGoalRepository
{
private readonly WebAPIDataContext _db;
public CoreGoalRepository(WebAPIDataContext db)
{
_db = db;
}
//Find specific
public CoreGoal Find(long key)
{
return _db.CoreGoals.FirstOrDefault(t => t.CoreGoalId == key);
}
//Add new
public void CreateCoreGoal(CoreGoal coreGoal)
{
_db.CoreGoals.Add(coreGoal);
_db.SaveChanges();
}
}
And controller:
[Route("api/[controller]")]
public class CoreGoalController : Controller
{
private readonly ICoreGoalRepository _coreGoalRepository;
//Controller
public CoreGoalController(ICoreGoalRepository coreGoalRepository) {
_coreGoalRepository = coreGoalRepository;
}
[HttpGet("{id}", Name = "GetCoreGoal")]
public IActionResult GetById(long id)
{
var item = _coreGoalRepository.Find(id);
if (item == null)
{
return NotFound();
}
return new ObjectResult(item);
}
//Create
[HttpPost]
public IActionResult Create([FromBody] CoreGoal item)
{
if (item == null)
{
return BadRequest();
}
_coreGoalRepository.CreateCoreGoal(item);
return CreatedAtRoute("GetCoreGoal", new { id = item.CoreGoalId }, item);
}
}
On POST request for CoreGoal- While creating a new CoreGoal, I would like to convert Image model's Base64 attribute from string to byte[]. I found this (https://adrientorris.github.io/aspnet-core/manage-base64-encoding.html) blogpost, but I am not sure where Am I supposed to write this piece of code.
Can someone help me?
Initially you should chage you database model to save you binary image to db (also, it's still not good idea, but let leave it for a now):
public class Image
{
[Key]
public long ImagelId { get; set; }
[NotMapped]
public string Base64 { get; set; }
public byte[] Binary {get; set;}
[ForeignKey("CoreGoalId")]
public long CoreGoalId { get; set; }
public Image()
{
}
}
next you just should convert your image inside controller:
[HttpPost]
public IActionResult Create([FromBody] CoreGoal item)
{
if (item == null)
{
return BadRequest();
}
item.Binary = Convert.FromBase64String(item.Base64);
_coreGoalRepository.CreateCoreGoal(item);
return CreatedAtRoute("GetCoreGoal", new { id = item.CoreGoalId }, item);
}
BTW:you code still not good. It's not necessary to use Repository pattern with EF core (https://www.thereformedprogrammer.net/is-the-repository-pattern-useful-with-entity-framework-core/). And you should introduce two model layers: public layer and model layer. You shouldn't expose EF Core contract to outside.