Attachments

@Html.Attachments()

Functionality for uploading and displaying attachments or files.

Constructors


		MvcHtmlString Attachments(this HtmlHelper helper,
		object htmlAttributes = null, string imagePage = "/ajax/ImagePreview",
		List<Attachment> attachments = null,
		string downloadFunction = "DownloadFile", string deleteFunction = "DeleteFile",
		bool readOnly = false, string buttonText = "Add Attachment"),
		bool hoverResize = true)

Properties

string imagePage

Default: "/ajax/ImagePreview"

The location to the page which renders the attachment image.

List<Attachment> attachments

Default: null

The existing list of attachments to render.

string downloadFunction

Default: "DownloadFile"

Javascript function called to download a file.

string deleteFunction

Default: "DeleteFile"

Javascript function called to delete a file.

bool readOnly

Default: false

Make the control read only.

string buttonText

Default: Add Attachment

The text on the upload button.

bool hoverResize

Default: true

Cause preview images to go full size when hovered over.

Javascript


		ShareItLibrary.Attachment.InitFileUpload (uploadUrl, renderFunction);

Properties

uploadUrl

The C# function which will upload the files.

renderFunction

The javascript function to render files.


		ShareItLibrary.Attachment.RenderAttachments (attachments, imagePage, downloadFunction, deleteFunction);

Properties

attachments

The json data which holds the list of attachments.

imagePage

The C# function to render the image.

downloadFunction

The javascript function to donload files.

deleteFunction

The javascript function to delete files.

Allow uploading, deleting of files.

Razor


		@Html.Attachments(attachments: (List<Attachment>) ViewBag.Attachments, downloadFunction: "MyApp.Controller.DownloadFile", imagePage: "/Controller/Action", deleteFunction: "MyApp.Controller.DeleteFile", readOnly: readOnly)

Javascript

On Init

if ($('#FileUploadBox').length) {

ShareItLibrary.Attachment.InitFileUpload('/Ajax/UploadFiles', MyApp.Controller.RenderFiles);

}

C#

[HttpGet]

public ActionResult Download(Guid aid)

{

var Attachment = db.AttachmentGet(aid, null, null, User.UserId()).SingleOrDefault();

if (Attachment != null)

return File(Attachment.Attachment, SiUtil.ContentTypeFromFilename(Attachment.Filename), Attachment.Filename);

else

return null;

}

[HttpPost]

public ActionResult DeleteFile(Guid aid)

{

var Attachment = db.AttachmentDelete(aid, User.UserId());

return Json("");

}

[HttpPost]

public JsonResult Attachments(Guid? issueId, Guid? discussionId)

{

var attachments = db.AttachmentGet(null, issueId, discussionId, User.UserId()).ToList();

return Json(attachments);

}

Allow uploading, deleting of single file.

Razor


		@Html.Attachments(attachments: (List<Attachment>) ViewBag.Attachments, downloadFunction: "MyApp.JsController.DownloadFile", imagePage: "[/Controller/]Action")

JavascriptOn Init
MyApp.JsController.Init = function () {
	ShareItLibrary.Attachment.AddFormData("FileId", $('#FileId').val());
	ShareItLibrary.Attachment.InitFileUpload('UploadFiles', MyApp.JsController.RenderFiles);
	MyApp.JsController.RenderFiles();
};

MyApp.JsController.DownloadFile = function (fileId) {
	window.open('Download?aid=' + fileId);
};

MyApp.JsController.RenderFiles = function () {
	var headers = {};
	headers['__RequestVerificationToken'] = $('[name="__RequestVerificationToken"]').val();

	$.ajax({
		type: "POST",
		url: '/Controller/Files',
		headers: headers,
		data: 'FileId=' + $('#FileId').val(),
		dataType: "json",
		error: function (jqXHR, textStatus, errorThrown) {
			alert(errorThrown);
		}
	}).done(function (data) {
		ShareItLibrary.Attachment.RenderAttachments(data, 'Download', 'MyApp.JsController.DownloadFile', 'MyApp.JsController.DeleteFile');
	});
};

C#

[HttpPost]

public ActionResult EditSet(FileGet_Result file)

{

if (ModelState.IsValid)

{

db.FileSet(file.FileId, file.FileType, null, null);

...

}

[HttpPost]

public ActionResult Files(Guid? fileId)

{

var files = db.FileGet(fileId, null).Select(f => new { Filename = f.FileName, AttachmentId = f.FileId }).ToList();

return Json(files);

}

[HttpGet]

public ActionResult Download(Guid aid)

{

var file = db.FileGet(aid, null).SingleOrDefault();

if (file != null)

return File(file.FileData, SiUtil.ContentTypeFromFilename(file.FileName), file.Filename);

else

return null;

}

[HttpPost]

public JsonResult UploadFiles(Guid? fileId)

{

var files = Request.Files;

foreach (string key in files)

{

var file = files[key];

string filename = file.FileName.Substring(file.FileName.LastIndexOf('\\') + 1);

byte[] fileData = new byte[file.InputStream.Length];

file.InputStream.Read(fileData, 0, fileData.Length);

db.FileSet(fileId, null, filename, fileData);

}

return Json("");

}

Add variables to the file upload

Razor


		@Html.Attachments(attachments: (List<Attachment>) ViewBag.Attachments, downloadFunction: "MyApp.Controller.DownloadFile", imagePage: "/Controller/Action", deleteFunction: "MyApp.Controller.DeleteFile", readOnly: readOnly)

Javascript

On Init

if ($('#FileUploadBox').length) {

ShareItLibrary.Attachment.AddFormData("MyId", $('#MyId').val());

ShareItLibrary.Attachment.AddFormData("MySecondId", $('#MySecondId').val());

ShareItLibrary.Attachment.InitFileUpload('/Ajax/UploadFiles', MyApp.Controller.RenderFiles);

}

C#

[HttpGet]

public ActionResult Download(Guid aid)

{

var Attachment = db.AttachmentGet(aid, null, null, User.UserId()).SingleOrDefault();

if (Attachment != null)

return File(Attachment.Attachment, SiUtil.ContentTypeFromFilename(Attachment.Filename), Attachment.Filename);

else

return null;

}

[HttpPost]

public ActionResult DeleteFile(Guid aid)

{

var Attachment = db.AttachmentDelete(aid, User.UserId());

return Json("");

}

[HttpPost]

public JsonResult Attachments(Guid? myId, Guid? mySecondId)

{

var attachments = db.AttachmentGet(null, myId, mySecondId, User.UserId()).ToList();

return Json(attachments);

}

Upload Only

Razor


		@Html.Attachments(null, buttonText: "Upload File")

JavascriptOn Init
if ($('#FileUploadBox').length) {
    ShareItLibrary.Attachment.InitFileUpload('/Controller/UploadFiles', function (d) {
        if (d.Total > 0) {
            $('#BulkUpload').val('True');
            $('#BulkUpload').closest('form').submit();
        }
        else
            window.location.reload();
    }

C#

[HttpGet]

public JsonResult UploadFiles()

{

var files = Request.Files;

foreach (string key in files)

ImportFile(files[key]);

return Json("");

}

private void ImportFile(HttpPostedFileBase file)

{

StreamReader csvreader = new StreamReader(file.InputStream);

CsvHelper.CsvReader csv = new CsvHelper.CsvReader(csvreader);

var records = csv.GetRecords<MyCsv>().ToList();

... do stuff with records.

}