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.netasp.net-corerazor-pagesblueimp

How can I pass the URL of a Razor Pages Method to jQuery-File-Upload

I'm using this git repo BlueImp/jQuery-File-Upload to upload files in a Razor Pages Web app. I'm having an issue being able to hit the DeleteFile method when delete button is clicked.

When a file is uploaded a Json response is sent to the form containing the delete URL for DeleteFiles Method which is picked up by an x-tmpl script

enter image description here

public async Task<ActionResult> OnPostUploadProfileImage()
        {           
            var httpPostedFiles = HttpContext.Request.Form.Files;
            var webRootPath = _hostingEnviroment.WebRootPath;
            var fileUploadProfile = httpPostedFiles[0];

            List<ViewDataUploadFilesResult> fileResults = new List<ViewDataUploadFilesResult>();
            UploadResult uploadResult = new UploadResult()
            {
                files = fileResults
            };

            if (fileUploadProfile != null)
            {
                var newProfileImageFileName = Guid.NewGuid().ToString();
                var profileImageFolder = Path.Combine(webRootPath, @"images\profileImages");
                var profileImageExtenstion = Path.GetExtension(fileUploadProfile.FileName);

                using (var fileStream = new FileStream(Path.Combine(profileImageFolder, newProfileImageFileName + profileImageExtenstion), FileMode.Create))
                {
                    fileUploadProfile.CopyTo(fileStream);
                }

                string profileImageUrl = @"images\profileImages\" + newProfileImageFileName + profileImageExtenstion;

                var result = new ViewDataUploadFilesResult()
                {
                    Name = fileUploadProfile.FileName,
                    Size = fileUploadProfile.Length,
                    ThumbnailUrl = "https://localhost:7062/" + profileImageUrl,
                    Url = "https://localhost:7062/" + profileImageUrl,
                    DeleteUrl = "https://localhost:7062/" + "Donations/DonationPageSettings/DeleteFile?file=" + newProfileImageFileName + profileImageExtenstion,
                    DeleteType = "GET",
                    Error = null
                };

                fileResults.Add(result);                
            }

            return new JsonResult(uploadResult);
        }

    public async Task<IActionResult> OnGetDeleteFile()
    {
        var Blegh = "";
        return Page();
    }

On the cshtml file there is a x-tmpl that handles the upload form.

<script id="template-download" type="text/x-tmpl">
    {% for (var i=0, file; file=o.files[i]; i++) { %}
        <tr class="template-download">
            <td>
                <span class="preview d-flex justify-content-center flex-align-center" style="height: 80px">
                    {% if (file.thumbnailUrl) { %}
                        <a href="{%=file.url%}"  title="{%=file.name%}" download="{%=file.name%}" data-gallery><img src="{%=file.thumbnailUrl%}" style="width: 80px; height: 80px;"></a>
                    {% } %}
                </span>
            </td>
            <td>
                <p class="name">
                    {% if (file.url) { %}
                        <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" {%=file.thumbnailUrl?'data-gallery':''%}>{%=file.name%}</a>
                    {% } else { %}
                        <span>{%=file.name%}</span>
                    {% } %}
                </p>
                {% if (file.error) { %}
                    <div><span class="label label-danger">Error</span> {%=file.error%}</div>
                {% } %}
            </td>
            <td>
                <span class="size">{%=o.formatFileSize(file.size)%}</span>
            </td>
            <td nowrap>
                {% if (file.deleteUrl) { %}
                    <button class="btn btn-outline-danger btn-sm btn-block delete" data-type="{%=file.deleteType%}" data-url="{%=file.deleteUrl%}"{% if (file.deleteWithCredentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
                        <span>Delete</span>
                    </button>                   
                {% } else { %}
                    <button class="btn btn-outline-default btn-sm d-block w-100 cancel">
                        <span>Cancel</span>
                    </button>
                {% } %}
            </td>
        </tr>
    {% } %}
</script>

I've tried wrapping the button in a form with asp-page-handler="DeleteFiles" but this cant work as the button is already contained inside the upload form so it never hits the OnGetDeleteFiles method.

How can I make the Delete button call the OnGetDeleteFiles from within the x-tmpl using the URL that's passed to it.

Solution

  • Ok I figured it out, I was passing the Delete URL wrong, it needs to have the handler passed in URL itself. I guess its because I was trying to use asp helpers within x-tmpl script

    Changed

    DeleteUrl = "https://localhost:7062/" + "Donations/DonationPageSettings/DeleteFile?file=" + newProfileImageFileName + profileImageExtenstion,

    To

    DeleteUrl = "https://localhost:7062/Donations/DonationPageSettings?file=" + newProfileImageFileName + profileImageExtenstion +"&handler=DeleteFile",