/// <summary>
    /// Handles delete button action - deletes user favorite.
    /// </summary>
    protected void btnDelete_OnCommand(object sender, CommandEventArgs e)
    {
        // Check permissions
        if (!IsAvailable(ForumContext.CurrentForum, ForumActionType.Attachment))
        {
            ShowError(GetString("ForumNewPost.PermissionDenied"));
            return;
        }

        if (e.CommandName == "delete")
        {
            int attachmentId = ValidationHelper.GetInteger(e.CommandArgument, 0);

            // Get forum attachment info
            ForumAttachmentInfo fai = ForumAttachmentInfoProvider.GetForumAttachmentInfo(attachmentId);
            if (fai != null)
            {
                // Delete attachment
                ForumAttachmentInfoProvider.DeleteForumAttachmentInfo(fai);
            }

            //Reload page
            URLHelper.Redirect(RequestContext.CurrentURL);
        }
    }
    /// <summary>
    /// Unigrid Action event handler.
    /// </summary>
    private void UniGrid_OnAction(string actionName, object actionArgument)
    {
        if (actionName == "delete")
        {
            if (!CheckPermissions("cms.forums", PERMISSION_MODIFY))
            {
                return;
            }

            ForumAttachmentInfoProvider.DeleteForumAttachmentInfo(ValidationHelper.GetInteger(actionArgument, 0));
        }
    }