AjaxControlToolkit.ModalPopupExtender.Show C# (CSharp) Method

        public void Show()
        {
            _show = true;
        }

    protected void SaveModelAs(object sender, EventArgs e)
    {
        if (DbUse.InRunProcess(userDir))
        {
            Master.ShowErrorMessage("Cannot save the model because calculations are still running. Please wait.");
            return;
        }
        hdnNewNameMode.Value = SaveMode.CURRENT_MODEL.ToString();

        string modelName = Master.GetCurrentModel();

        if (modelName == null || modelName.Equals("") || modelName.Equals("none"))
        {
            string message = "Cannot save the model because no model is loaded.";
            Master.ShowErrorMessage(message);
        }
        else if (IsWhatifMode())
        {
            Master.SetFocus2(btnGoToWhatif.ClientID);
            modalGoToWhatif.Show();
        }
        else
        {
            TextBox txtNewName = pnlNewModelPopup.FindControl(InputPageControls.TXT_NEW_NAME) as TextBox;
            txtNewName.Text = modelName;
            lblNewName.Text = "Save current model as: ";
            extenderNewModel.Show();
            Master.SetFocus(txtNewName.ClientID);
        }
    }