AjaxControlToolkit.AjaxFileUpload.GenerateHtmlInputControls C# (CSharp) Méthode

        protected string GenerateHtmlInputControls()
        {
            HtmlGenericControl parent = new HtmlGenericControl("div");
            parent.Attributes.Add("class", "ajax__fileupload");
            Controls.Add(parent);

            var inputFileStyle =
                "opacity:0; -moz-opacity: 0.0; filter: alpha(opacity=0);";

            HtmlInputFile inputFile = new HtmlInputFile();
            if(!Enabled)
                inputFile.Disabled = true;
            inputFile.Attributes.Add("id", ClientID + "_Html5InputFile");
            inputFile.Attributes.Add("multiple", "multiple");
            inputFile.Attributes.Add("style", inputFileStyle);
            HideElement(inputFile);

            HtmlInputFile inputFileElement = new HtmlInputFile();
            if(!Enabled)
                inputFileElement.Disabled = true;
            inputFileElement.Attributes.Add("id", ClientID + "_InputFileElement");
            inputFileElement.Attributes.Add("name", "act-file-data");
            inputFileElement.Attributes.Add("style", inputFileStyle);
            HideElement(inputFileElement);

            HtmlGenericControl dropZone = new HtmlGenericControl("div");
            dropZone.Attributes.Add("class", "ajax__fileupload_dropzone");
            dropZone.Attributes.Add("id", ClientID + "_Html5DropZone");
            // IE 10 requested dropzone to be have actual size
            dropZone.Attributes.Add("style", "width:100%; height:60px;");
            HideElement(dropZone);
            parent.Controls.Add(dropZone);

            HtmlGenericControl fileStatusContainer = new HtmlGenericControl("div");
            fileStatusContainer.Attributes.Add("id", ClientID + "_FileStatusContainer");
            fileStatusContainer.Style[HtmlTextWriterStyle.Position] = "absolute";
            fileStatusContainer.Style["right"] = "0";
            fileStatusContainer.Style["top"] = "2px";
            fileStatusContainer.Style["height"] = "20px";
            fileStatusContainer.Style["line-height"] = "20px";
            HideElement(fileStatusContainer);

            var selectFileContainer = GenerateHtmlSelectFileContainer(inputFileElement, inputFile);
            parent.Controls.Add(selectFileContainer);
            parent.Controls.Add(GenerateHtmlTopFileStatus(fileStatusContainer));

            var queueContainer = new HtmlGenericControl("div");
            queueContainer.Attributes.Add("id", ClientID + "_QueueContainer");
            queueContainer.Attributes.Add("class", "ajax__fileupload_queueContainer");
            queueContainer.Style[HtmlTextWriterStyle.MarginTop] = "28px";
            parent.Controls.Add(queueContainer);
            HideElement(queueContainer);

            var progressBar = new HtmlGenericControl("div");
            progressBar.Attributes.Add("id", ClientID + "_ProgressBar");
            progressBar.Attributes.Add("class", "ajax__fileupload_progressBar");
            progressBar.Attributes.Add("style", "width: 100%; display: none; visibility: hidden; overflow:visible;white-space:nowrap; height:20px;");

            var uploadButton = GenerateHtmlFooterContainer(progressBar);
            parent.Controls.Add(uploadButton);
            return parent.ClientID;
        }