the form Http POST doesn't work, only Get work in asp core mvc RSS

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  amnaw

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  the form Http POST doesn't work, only Get work in asp core mvc

  Mar 28, 2021 10:06 AM|amnaw|LINK

  I have a Form that should pass data through POST request, but GET request is being used without passing the data and do model binding of asp core, so buz of that the method Registrationp is never reach if the attribute [HttpPost] is in place ;( . I tried many ways to get over this problem but none if them worked, even though the other forms post the data and bind the model successfully

  HTML:

  @model Student_Training.Models.File;
      
   <form method="post" asp-controller="Students" asp-action="Registrationp" enctype="multipart/form-data">
       <label asp-for="FileRep" class="col-sm-2 col-form-label"></label>
       <div class="col-sm-10">
           <div class="custom-file">
               <input type="file" asp-for="FileRep" name="img" accept="image/*" class="form-control custom-file-input" />
               <label class="custom-file-label">Upload..</label>
           </div>
       </div>
       <div class="form-group">
           <button id="Button" type="submit" name="submit" formmethod="post" class="btn btn-secondary btn-sm">
               <a asp-action="Registrationp">Save</a>
           </button>
       </div>
   </form>

  Controller POST method:

   [HttpPost]
           public async Task<IActionResult> Registrationp([Bind("FileId, FileName, OwnerId, FileRep")] Student_Training.Models.File imgFileModel, IFormFile img, int? id)
           {
               var user = await _userManager.FindByNameAsync(User.Identity.Name);
               var userEmail = user.Email;
               Student Student = _context.Student.FirstOrDefaultAsync(x => x.Email == userEmail).Result;
               // StudentId
               id = Student.StudentId;
      
               // Save img to wwwroot/img folder
               string wwwRootPath = _hostEnvironment.WebRootPath;
               Student_Training.Models.File myFile = new Student_Training.Models.File();
               string fileName = Path.GetFileNameWithoutExtension(imgFileModel.FileRep.FileName);
               string extention = Path.GetExtension(imgFileModel.FileRep.FileName);
               imgFileModel.FileName = fileName = fileName + DateTime.Now.ToString("yymmss") + extention;
               string path = Path.Combine(wwwRootPath + "/img/", fileName);
               using (var fileStream = new FileStream(path, FileMode.Create))
               {
                   await imgFileModel.FileRep.CopyToAsync(fileStream);
               }
               // insert recorod to Db
               _context.Add(imgFileModel);
               await _context.SaveChangesAsync();
      
               return View();
           }

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  amnaw

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  Re: the form Http POST doesn't work, only Get work in asp core mvc

  Mar 28, 2021 10:45 AM|amnaw|LINK

  Solved

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  mgebhard

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  24031 Posts

  Re: the form Http POST doesn't work, only Get work in asp core mvc

  Mar 28, 2021 10:59 AM|mgebhard|LINK

  Your sample code indicates you do not understand model binding.  The HTML form should have FileId, FileName, OwnerId, and FileRep inputs.  The only input in the HTML form is "img" which is not one of the Bind fields.

  Learn model binding fundamentals.

  https://docs.microsoft.com/en-us/aspnet/core/mvc/models/model-binding?view=aspnetcore-5.0

  I also recommend going through the Getting Started tutorials on this site which also covers model binding and several other fundamental MVC programming patterns.

  https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/start-mvc?view=aspnetcore-5.0&tabs=visual-studio

  https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/?view=aspnetcore-5.0