/// <summary>  /// 注册客户端CSS文件  /// </summary>  /// <param name="page"></param>  /// <param name="relativeURL"></param>  public static void RegisterClientCSSFile(Page page, string relativeURL)  {      relativeURL = page.ResolveUrl(relativeURL);      page.Header.Controls.Add(new LiteralControl("\n<link href=\"" + relativeURL + "\" rel=\"stylesheet\" type=\"text/css\">\n"));  }  /// <summary>  /// 网页延迟退出  /// </summary>  /// <param name="page"></param>  /// <param name="script"></param>  /// <param name="delayTime">以秒为单位?</param>  public static void ClosePage(Page page, string script, int delayTime)  {      string closeScript. = "";      closeScript. += "<script. language=javascript>";      closeScript. += "setTimeout(\"ClosePage()\","+ (delayTime * 1000).ToString()+");";      closeScript. += "function ClosePage(){window.close();"+script+"};";      closeScript. += "</script>";      page.ClientScript.RegisterClientScriptBlock(page.GetType(), "ClosePage",   closeScript);  }  /// <summary>  /// 注册客户端脚本文件  /// Creator: Create Time:2009/7/22 13:47:20  /// </summary>  /// <param name="page"></param>  /// <param name="key"></param>  /// <param name="relativeURL"></param>  public static void RegisterClientScriptFile(Page page, string key, string relativeURL)  {      relativeURL = page.ResolveUrl(relativeURL);      if (!page.ClientScript.IsClientScriptIncludeRegistered(key))      {   page.ClientScript.RegisterClientScriptInclude(key, relativeURL);      }  }  /// <summary>  ///  /// </summary>  /// <param name="control"></param>  public static void AutoBreakWord(WebControl control)  {      if (control != null)      {   control.Style.Add("word-break", "break-all");      }  }  /// <summary>  ///  /// </summary>  /// <param name="control"></param>  public static void DisablePaste(WebControl control)  {      if (control != null)      {   control.Attributes.Add("onpaste", "event.returnValue=false;");      }  }  /// <summary>  ///  /// </summary>  /// <param name="control"></param>  public static void DisableKeyDown(WebControl control)  {      if (control != null)      {   control.Attributes.Add("onkeydown", "event.returnValue=false;");      }  }