Timer control's Tick event is not working on WSS Web Part

Question

Sample Code is :-

Code from .cs file

 

protected void Page_Load(object sender, EventArgs e)

{

 

if (!Page.IsPostBack)

{

 

try

{

StrConnection =

"data source=" + System.Configuration.ConfigurationManager.AppSettings["Server"].ToString() + ";initial catalog=" + System.Configuration.ConfigurationManager.AppSettings["Database"].ToString() + ";User ID=" + System.Configuration.ConfigurationManager.AppSettings["Username"].ToString() + ";Password=" + System.Configuration.ConfigurationManager.AppSettings["Password1"].ToString() + ";persist security info=True;packet size=4096";

getSelectData();

Label1.Text =

DateTime.Now.ToLongTimeString();

timer =

new Timer();

timer.Interval = 1000;

timer.Tick +=

new EventHandler(TimerHandler);

}

 

catch (System.Exception ErrMessage)

{

Response.Write(ErrMessage.Message.ToString());

}

}

}

 

Code from Html

<

asp:ScriptManager ID="ScriptManager" runat="server"/>

<

asp:UpdatePanel ID ="UpdatePanel1" runat="server" UpdateMode="Conditional">

 

<ContentTemplate>

</ContentTemplate>
</asp:UpdatePanel>

Answer 1

i meet same ，i want to show system-time in moss webparts,and refurbisn 1s,but when
refreshName.ContentTemplateContainer.Controls.Add(tm);
or
AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();  all error

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;

namespace HelloWebPart
{
    [Guid("35bce816-acb9-4251-bf36-7981503535e9")]
    public class HelloWebPart : Microsoft.SharePoint.WebPartPages.WebPart
    {
        public HelloWebPart()
        {
            this.ExportMode = WebPartExportMode.All;

        }
        private Label displayName;
        private TextBox inputName;
        private Label showTime;
        string h = DateTime.Now.Hour.ToString();//获取系统时间小时 
        string m = DateTime.Now.Minute.ToString();//获取系统时间分钟 
        string s = DateTime.Now.Second.ToString();//获取系统时间秒 
        UpdatePanel refreshName = new UpdatePanel();
        Timer tm = new Timer();

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);


        }
        protected  override void CreateChildControls()
        {
            base.CreateChildControls();

            //Fix for the UpdatePanel postback behaviour.
            EnsurePanelFix();

            LinkButton sayHello = new LinkButton();

            ScriptManager scriptHandler = new ScriptManager();
            displayName = new Label();
            inputName = new TextBox();

            
            showTime = new Label();


            this.showTime.ID = "showtime";
            this.showTime.Text = "T：" + h + "时" + m + "分" + s + "秒";
            //Set up control properties.
            this.displayName.ID = "displayName";
            this.displayName.Text = "Hello!";
            this.inputName.ID = "inputName";
            sayHello.ID = "sayHello";
            sayHello.Text = "Say Hello";
            scriptHandler.ID = "scriptHandler";
            refreshName.ID = "refreshName";
            //refreshName.UpdateMode = UpdatePanelUpdateMode.Conditional;
            refreshName.UpdateMode = UpdatePanelUpdateMode.Always;
            refreshName.ChildrenAsTriggers = true;


            //Add the EventHandler to the Button.
            sayHello.Click += new EventHandler(ClickHandler);

            
            tm.Enabled = true;
            tm.ID = "tm";
            tm.Interval = 1000000;
            tm.Tick += new EventHandler<EventArgs>(Tm_Tick);
            //refreshName.ContentTemplateContainer.Controls.Add(tm);

            AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
            trigger.ControlID = "tm";
            refreshName.Triggers.Add(trigger);
            //Add the user interface (UI) controls to the UpdatePanel.
            refreshName.ContentTemplateContainer.Controls.Add(this.inputName);
            refreshName.ContentTemplateContainer.Controls.Add(sayHello);
            refreshName.ContentTemplateContainer.Controls.Add(this.displayName);
            //refreshName.ContentTemplateContainer.Controls.Add(tm);
            refreshName.ContentTemplateContainer.Controls.Add(this.showTime);

            //The ScriptManager control must be added first.
            this.Controls.Add(scriptHandler);
            this.Controls.Add(refreshName);
            //this.Controls.Add(tm);
        }

        private void ClickHandler(object sender, EventArgs args)
        {
            this.displayName.Text = "Hello, "
              + this.inputName.Text.ToString() + ".";
        }
        protected void Tm_Tick(object sender, EventArgs e)
        {
            this.showTime.Text = DateTime.Now.ToString();
        }

        protected override void RenderWebPart(HtmlTextWriter output)
        {
            RenderChildren(output);

        }


        //修改脚本以确保正确的 doPostBack() 行为
        private void EnsurePanelFix()
        {
            if (this.Page.Form != null)
            {
                String fixupScript = @"
     _spBodyOnLoadFunctionNames.push(""_initFormActionAjax"");
     function _initFormActionAjax()
     {
       if (_spEscapedFormAction == document.forms[0].action)
       {
         document.forms[0]._initialAction = 
         document.forms[0].action;
       }
     }
     var RestoreToOriginalFormActionCore = 
       RestoreToOriginalFormAction;
     RestoreToOriginalFormAction = function()
     {
       if (_spOriginalFormAction != null)
       {
         RestoreToOriginalFormActionCore();
         document.forms[0]._initialAction = 
         document.forms[0].action;
       }
     }";
                ScriptManager.RegisterStartupScript(this,
                  typeof(HelloWebPart), "UpdatePanelFixup",
                  fixupScript, true);
            }
        }

    }
}