c#if代码中弹出alert窗口

Question

怎么写？

Answer 1

        /// <summary>
        /// 弹出JavaScript小窗口
        /// </summary>
        /// <param name="js">窗口信息</param>
        public static void Alert(string message)
        {
            #region
            string js = @"<Script language='JavaScript'>
                    alert('" + message + "');</Script>";
            HttpContext.Current.Response.Write(js);
            #endregion
        }        /// <summary>
        /// 弹出JavaScript小窗口提示用户是否提交
        /// </summary>
        /// <param name="js">窗口信息</param>
        /// 
        public static void Confirm(WebControl button)
        {
            button.Attributes.Add("onclick", "return confirm(\"确认要添加？\")");
        }
        public static void Confirm(string message)
        {
            #region
            string js = @"<Script language='JavaScript'>
                    if(confirm('" + message + "是否提交?')){ return true; }else return false;} </Script>";
            HttpContext.Current.Response.Write(js);
            #endregion
        }        /// <summary>
        /// 弹出消息框并且转向到新的URL
        /// </summary>
        /// <param name="message">消息内容</param>
        /// <param name="toURL">连接地址</param>
        public static void AlertAndRedirect(string message, string toURL)
        {
            #region
            string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
            #endregion
        }
    }

Answer 2

Response.Write("<script>alert('ok');</script>");

Answer 3

不是button click，是程序中触发

Answer 4

if(***)
   Page.RegisterStartupScript("ss2", "<script>alert('A!')</script>");
else
   Page.RegisterStartupScript("ss2", "<script>alert('B!')</script>");

Answer 5

this.ClientScript.RegisterStartupScript(this.GetType(), "M" + DateTime.Now.Ticks.ToString(), "<script>alert('sss');</script>");

Answer 6

/// <summary>
        /// Show a messagebox in client explorer.
        /// </summary>
        /// <param name="msg"></param>
        protected virtual void ShowMessage(string msg)
        {
            ClientScript.RegisterStartupScript(GetType(), "___asp2TrainingShowMessage",
                                               "<script language=\"javascript\">var str=\"" +
                                               msg.Replace("\\", "\\\\").Replace("\r\n", " ").Replace("\"", "'") +
                                               "\";alert(str.replace(/<br>/g,'\\n').replace(/<BR>/g,'\\n'));</script>");
        }
直接调用该方法