如何使阿贾克斯定时器递减正确的asp.net? [英] How to make Ajax timer decrement properly in asp.net?
问题描述
我的工作中,我必须展示一个倒计时,直到考试结束的在线考试项目。
我用下面的code:
ASPX code:
< ASP:的ScriptManager ID =SM1=服务器>< / ASP:ScriptManager的>
< ASP:的UpdatePanel ID =updPnl=服务器的UpdateMode =条件>
<&的ContentTemplate GT;
< ASP:标签ID =lblTimer的风格=的margin-top:35px;保证金左:825px; =服务器FONT-粗体=真FONT-名称=宋体FONT-SIZE =X大前景色=#6600CC>< / ASP:标签>
< DIV的风格=保证金权:25px的;>
< ASP:AlwaysVisibleControlExtender ID =AlwaysVisibleControlExtender1=服务器的TargetControlID =lblTimer>
< / ASP:AlwaysVisibleControlExtender>
< ASP:定时器ID =定时器1=服务器
时间间隔=1000OnTick =timer1_tick>< / ASP:定时器>
< / DIV>
< /&的ContentTemplate GT;
<&触发器GT;
< ASP:AsyncPostBackTrigger控件ID =定时器事件名称=嘀/>
< /触发器>
< / ASP:的UpdatePanel>
code后面的是:
保护无效的Page_Load(对象发件人,EventArgs的发送)
{
如果(!Page.IsPostBack)
{
绑定();
bind1();
结果();
会话[结果] = lblshow.Text; 如果(!SM1.IsInAsyncPostBack)
{
SqlConnection的sqlc1 =新的SqlConnection(STRCON); sqlc1.Open(); 字符串str =从TestCreated订单来自序号递减选择前1 *;
CMD1的SqlCommand =新的SqlCommand(STR,sqlc1);
//sqlc.Open();
SqlDataReader的博士= cmd1.ExecuteReader();
如果(dr.Read())
{
会话[timeout1] =博士[TestDuration]的ToString()。 }
会话[超时] DateTime.Now.AddMinutes(Convert.ToInt32(会话[timeout1]的ToString()))的ToString()。
} }}保护无效timer1_tick(对象发件人,EventArgs的发送)
{
如果(会话[超时] == NULL)
会话[时间] = DateTime.Now.AddSeconds(10);
如果(0方式> DateTime.Compare(DateTime.Now,DateTime.Parse(会话[超时]的ToString())))
{
lblTimer.Text =的String.Format(剩余时间:00:{0}:{1}, ((Int32)DateTime.Parse(Session[\"timeout\"].ToString()).Subtract(DateTime.Now).TotalMinutes).ToString(), (。(Int32)已DateTime.Parse(会话[超时]的ToString())减(DateTime.Now).Seconds)的ToString()); }
这code是工作的罚款在本地服务器上,但是当我部署它在我的Web服务器上的计时器没有倒计时得当,减了4秒,5秒,就像this.even我试图改变我的计时器间隔但它不工作。
我怎样才能让这个定时器倒计时正确?
//添加的ScriptManager和定时器控制。< DIV>
< ASP:的ScriptManager ID =SM1=服务器>< / ASP:ScriptManager的>
< ASP:定时器ID =定时器1=服务器
时间间隔=1000OnTick =timer1_tick>< / ASP:定时器>
< / DIV>
//添加更新面板,
//一个标签,以显示剩余时间和AsyncPostBackTrigger。
< DIV>
< ASP:的UpdatePanel ID =updPnl
=服务器的UpdateMode =条件>
<&的ContentTemplate GT;
< ASP:标签ID =lblTimer=服务器>< / ASP:标签>
< /&的ContentTemplate GT;
<&触发器GT;
< ASP:AsyncPostBackTrigger控件ID =定时器事件名称=嘀/>
< /触发器>
< / ASP:的UpdatePanel>
< / DIV>
这会为你工作.. @Skoar
上的 code项目
I'm working on a online exam project in which I have to show a countdown till the exam ends. I have used the following code:
aspx code:
<asp:ScriptManager ID= "SM1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel id="updPnl" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblTimer" style=" margin-top:35px; margin-left:825px;" runat="server" Font-Bold="True" Font-Names="Arial" Font-Size="X-Large" ForeColor="#6600CC"></asp:Label>
<div style="margin-right:25px;">
<asp:AlwaysVisibleControlExtender ID="AlwaysVisibleControlExtender1" runat="server" TargetControlID="lblTimer">
</asp:AlwaysVisibleControlExtender>
<asp:Timer ID="timer1" runat="server"
Interval="1000" OnTick="timer1_tick"></asp:Timer>
</div>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="timer1" EventName ="tick" />
</Triggers>
</asp:UpdatePanel>
Code behind is:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
bind();
bind1();
Result();
Session["Result"] = lblshow.Text;
if (!SM1.IsInAsyncPostBack)
{
SqlConnection sqlc1 = new SqlConnection(strcon);
sqlc1.Open();
String str = "select top 1 * from TestCreated order by Id desc";
SqlCommand cmd1 = new SqlCommand(str, sqlc1);
//sqlc.Open();
SqlDataReader dr = cmd1.ExecuteReader();
if (dr.Read())
{
Session["timeout1"] = dr["TestDuration"].ToString();
}
Session["timeout"] DateTime.Now.AddMinutes(Convert.ToInt32(Session["timeout1"].ToString())).ToString();
}
}
}
protected void timer1_tick(object sender, EventArgs e)
{
if (Session["timeout"] == null)
Session["time"] = DateTime.Now.AddSeconds(10);
if (0 > DateTime.Compare(DateTime.Now, DateTime.Parse(Session["timeout"].ToString())))
{
lblTimer.Text = string.Format("Time Left: 00:{0}:{1}", ((Int32)DateTime.Parse(Session["timeout"].ToString()).Subtract(DateTime.Now).TotalMinutes).ToString(), ((Int32)DateTime.Parse(Session["timeout"].ToString()).Subtract(DateTime.Now).Seconds).ToString());
}
This code is working fine on the local server but when I deployed it on my web server the timer is not counting down properly it decrements by 4 sec and 5 sec like this.even I tried by changing my timer interval but it's not working. How can I make this timer to countdown properly?
// Add the ScriptManager and Timer Control.
<div>
<asp:ScriptManager ID= "SM1" runat="server"></asp:ScriptManager>
<asp:Timer ID="timer1" runat="server"
Interval="1000" OnTick="timer1_tick"></asp:Timer>
</div>
// Add the update panel,
//a label to show the time remaining and the AsyncPostBackTrigger.
<div>
<asp:UpdatePanel id="updPnl"
runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblTimer" runat="server"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="timer1" EventName ="tick" />
</Triggers>
</asp:UpdatePanel>
</div>
This will work for you @Skoar..
more details on code project
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