asp.net – RegisterStartupScript不能使用ScriptManager,Updatepanel 这是为什么？

protected void timer1_Tick(object sender,EventArgs e)
    {
        foreach (RepeaterItem item in rpChat.Items)
        {
            TextBox txt = item.FindControl("txtChatMessage") as TextBox;
            if (txt != null)
            {
                message[i] = txt.Text;
                i--;
            }
        }
        lblStatusChat.Text = "";
        RepeaterBind();
        string javaScript = "<script language=JavaScript>\n" + "alert('Button1_Click client-side');\n" + "</script>";

        Page.ClientScript.RegisterStartupScript(this.GetType(),"myKey",javaScript);
    }

timer_click触发器和更新面板。并且警报消息不显示在timer_tick事件上

解决方法

当你使用更新面板，那么你不能像上面那样调用javascript。你必须使用

ScriptManager.RegisterStartupScript

所以改变你的

Page.ClientScript.RegisterStartupScript(this.GetType(),javaScript);

至

ScriptManager.RegisterStartupScript(updatePanelId,updatePanelId.GetType(),"alert",javaScript,true);