I have a button and I trigger an action in my controller via the button. The button has tag helpers for the controller, route id, and action (see below):

(Line-breaks inserted for readability)

<div class="input-group-append">
    <button
        class="btn btn-outline-secondary"
        type="button"
        asp-controller="Home"
        asp-route-Id="@Model.Project.Id"
        asp-action="UploadDocument"
        id="uploadDocument"
    >
        Upload
    </button>
</div>

Here is the IActionResult in the controller:

        //POST - Upload document
        [HttpPost("~/Home/UploadDocument")]
        public IActionResult UploadDocument(int id, IFormFile files)
        {
             //Get and upload file
            if (files != null)
            {
                if (files.Length > 0)
                {
                    //Getting FileName
                    var fileName = Path.GetFileName(files.FileName);
                    //Getting file Extension
                    var fileExtension = Path.GetExtension(fileName);
                    // concatenating  FileName   FileExtension
                    //var newFileName = String.Concat(Convert.ToString(Guid.NewGuid()), fileExtension);                   

                    var objfiles = new Document()
                    {
                        Id = 0,
                        Name = fileName,
                        FileType = fileExtension,
                        ProjectId = id
                    };

                    using (var target = new MemoryStream())
                    {
                        files.CopyTo(target);
                        objfiles.DataFiles = target.ToArray();
                    }

                    _db.Files.Add(objfiles);

                }
            }

            _db.SaveChanges();
            return View(Update(id));
        } 

I put a breakpoint on the first line of code in UploadDocment and clicked the button. Nothing happened. The breakpoint never got hit. I'm not sure why this isn't working. I have:

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

... in my _ViewImports.cshtml file and the tag helpers work on other buttons.

CodePudding user response：

• The asp-action... tag-helpers are for use on <a> and <form> elements, not <button>.
• Additionally, another part of the problem is the type="button" on your <button>.
  • type="button" means that the button, when clicked, does nothing.
• So, to correct things:
  • Change your <button> to type="submit" to submit the parent <form> element.
  • And move the asp-action="" and asp-controller="" helpers to your <form>.

CodePudding user response：

You need to put <button> inside <form method="post"></form>.

<form method="post">
    <button class="btn btn-outline-secondary"
            asp-controller="Home"
            asp-route-Id="@Model.Project.Id"
            asp-action="UploadDocument"
            id="uploadDocument">Upload</button>
</form>

Generated html:

result: