I have looked around but everyone seems to point towards javascript. Being an asp.net c# server side devloper it is not something i am comfortable with.
I have this in my asp.net markup:
<asp:UpdatePanel ID="upVideo" runat="server">
<ContentTemplate>
<asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="100" OnTick="Timer1_Tick">
</asp:Timer>
<asp:Image ID="Image1" runat="server" ImageUrl="~/images/img00001.jpg" Width="352"
Height="288" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
</Triggers>
</asp:UpdatePanel>
and i have this in my codebehind to display a 'video' of 28 frames:
private void SetImageUrl()
{
int _index = Convert.ToInt16(Session["FrameIndex"]);
_index++;
if (_index == 29)
{
_index = 0;
}
Image1.ImageUrl = "~/images/img000" + _index.ToString("00") + ".jpg";
Session["FrameIndex"] = _index;
}
protected void Timer1_Tick(object sender, EventArgs e)
{
try
{
SetImageUrl();
}
catch { }
}
It works but there is that dreaded 'flicker'. Has anyone come up with a fix for this at all?
thanks..
Related
I use this code for create timer that want to update a label each second:
timer = new System.Timers.Timer();
timer.Elapsed += new ElapsedEventHandler(OnRefresh_Tick);
timer.Interval = 1000;
The function OnRefresh_Tick call each second but the label text doesn't change.
Edit:
I use the below code for the timer, but when the timer starts, I can't write in the second textbox (txtPassword) and it refreshes and the cursor goes to the first textbox (txtUserName)
.aspx file:
<form id="form1" runat="server">
<br /><br />
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="txtUserName" runat="server" Height="30px" Width="100px"></asp:TextBox><br /><br />
<asp:TextBox ID="txtPassword" runat="server" Height="30px" Width="100px"></asp:TextBox><br /><br />
<asp:Label runat="server" id="lnkSendVerificationCode"></asp:Label><br /><br />
<asp:Button ID="Button1" runat="server" Text="Start Timer" CssClass="btn" OnClick="Button1_Click"/>
<asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
</ContentTemplate>
</asp:UpdatePanel>
</form>
.cs file:
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
}
}
protected void Button1_Click(object sender,EventArgs e)
{
Session["VerificationCodeCounter"] = "20";
Timer1.Enabled = true;
}//Button1_Click
protected void Timer1_Tick(object sender, EventArgs e)
{
int sendVerificationCounter = -1;
try { sendVerificationCounter = int.Parse(Session["VerificationCodeCounter"].ToString()); } catch { }//catch
if (sendVerificationCounter == 1)
{
sendVerificationCounter = -1;
Session["VerificationCodeCounter"] = sendVerificationCounter.ToString();
Timer1.Enabled = false;
}//if
else if (sendVerificationCounter > 0)
{
sendVerificationCounter--;
lnkSendVerificationCode.Text = sendVerificationCounter.ToString();
Session["VerificationCodeCounter"] = sendVerificationCounter.ToString();
}//else if
}//Button1_Click
Try say this:
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<div style="padding:25px">
<h4>enter seconds to count down</h4>
<asp:TextBox ID="txtCount" runat="server"
Height="42px"
Width="80px"
Font-Size="XX-Large"
Text="0"
style="text-align: center">
</asp:TextBox>
<br />
<asp:Button ID="Button1" runat="server" Text="Start Timer" CssClass="btn" OnClick="Button1_Click"/>
<asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
<br />
</div>
And code behind would be this:
protected void Button1_Click(object sender, EventArgs e)
{
Timer1.Interval = 1000; // tick our timer each second
Timer1.Enabled = true;
}
protected void Timer1_Tick(object sender, EventArgs e)
{
int MyCount = Convert.ToInt32(txtCount.Text);
if (MyCount > 0 )
{
MyCount = MyCount - 1;
txtCount.Text = MyCount.ToString();
}
else
{
// we are done, stop the timer
Timer1.Enabled = false;
}
}
So, we now see this if we enter 10 (for 10 seconds).
If we hit start timer, then it counts down to 0, and then stops the timer.
Edit: With a up-date panel
So, if we don't want a whole page re-fresh, then we can use this:
<h4>enter seconds to count down</h4>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="txtCount" runat="server"
Height="42px"
Width="80px"
Font-Size="XX-Large"
Text="0"
style="text-align: center">
</asp:TextBox>
<br />
<asp:Button ID="Button1" runat="server" Text="Start Timer" CssClass="btn" OnClick="Button1_Click"/>
<asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
</ContentTemplate>
</asp:UpdatePanel>
Remember, while the whole page will now not re-fresh, do keep in mind that the page life cycle DOES trigger. So, if you have some code in on-page load to setup controls? Then you need this
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// code here to load up grids, and controls
// code here ONLY runs on first time page load
}
}
So, keep in mind that for any up-date panel (button clicks, timer etc.), then the page load event DOES fire each time.
However, that !IsPostback check? The last 100+ web pages I created that loads or sets up ANYTHING on a page will have the above code stub, and check for !IsPostback.
You can't quite even make a working webforms page unless you follow the above rule. What this means is your page can now handle post-backs, and not re-load controls and run the first time setup of such controls.
So, keep in mind, a update panel DOES post-back, and does trigger the page load event. Better said, a update panel, and click of a button (or timer) inside will post-back, but it what we call a partial page post-back.
Edit3: With a label
So, say we want a label - not a text box. Then do this:
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<div style="padding:25px">
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="txtCount" runat="server"
Height="42px"
Width="80px"
Font-Size="XX-Large"
Text="999"
style="text-align: center">
</asp:Label>
<br />
<asp:Button ID="Button1" runat="server" Text="Start Timer" CssClass="btn" OnClick="Button1_Click"/>
<asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
</ContentTemplate>
</asp:UpdatePanel>
<br />
</div>
</form>
</body>
And now our code becomes this:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// code here to load up grids, and controls
// code here ONLY runs on first time page load
txtCount.Text = "10";
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Timer1.Interval = 1000; // tick our timer each second
Timer1.Enabled = true;
}
protected void Timer1_Tick(object sender, EventArgs e)
{
int MyCount = Convert.ToInt32(txtCount.Text);
if (MyCount > 0 )
{
MyCount = MyCount - 1;
txtCount.Text = MyCount.ToString();
}
else
{
// we are done, stop the timer
Timer1.Enabled = false;
}
}
And now we see this:
i want to create a 2 minute timer under text box using Asp.net, i wanted the timer to be in a label under the text box, so i wrote this code in the control page after double click in the timer icon:
int seconds = int.Parse(Label1.Text);
if (seconds > 0)
Label1.Text = (seconds - 1).ToString("mm:ss");
else
Timer1.Enabled = false;
And this code in the aspx file:
<span "CodeAsk">ألم تتلقى الرمز ؟</span><asp:Label ID="Label1" runat="server" text="2"></asp:Label>
<asp:Timer ID="Timer1" runat="server" OnTick="Timer1_Tick" Interval="120000"></asp:Timer>
but it's not working, what is the problem with my code?
but it's not working, what is the problem with my code?
Timer needs to be used in conjunction with the UpdatePanel control. You can trigger the ontick event of the timer through the AsyncPostBackTrigger method of the updatepanel.
And for converting the text of the Label into the form of a timer, you need to use TimeSpan time = TimeSpan.FromSeconds(seconds); to achieve, you can refer to this.
<form runat="server">
<asp:ScriptManager runat="server" ID="ScriptManager1" />
<asp:Timer ID="Timer1" runat="server" OnTick="Timer1_Tick" Interval="1000">
</asp:Timer>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<span id="CodeAsk">ألم تتلقى الرمز ؟</span><br />
<asp:Label ID="Label1" runat="server" Text="2"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
</Triggers>
</asp:UpdatePanel>
</form>
Code behind:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
TimeSpan time = TimeSpan.FromSeconds(Convert.ToInt32(Label1.Text) * 60);
string str = time.ToString(#"hh\:mm\:ss");
Label1.Text = str;
}
}
protected void Timer1_Tick(object sender, EventArgs e)
{
TimeSpan result = TimeSpan.FromSeconds(TimeSpan.Parse(Label1.Text).TotalSeconds - 1);
string fromTimeString = result.ToString(#"hh\:mm\:ss");
Label1.Text = fromTimeString;
}
Here is the test result:
I have a website i.e. I'm working on aspx pages. I am storing value in to the xml file.
I need to display value stored in xml at specified time interval (say 1 min) on a asp label. But not all records are to display at an instance. At first instance first record of xml and after time interval next record and so on. After last record again first record needed to display.
I Google search a lot on this but could not find specific solution on this.
Please help me with successful solution. Thanks...
This is my code but its not giving expected results. Please help me in editing this.
HTML code
<div>
<table width="100%">
<tr><td>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</td></tr>
<tr><td>
<asp:Timer ID="Timer1" runat="server" ontick="Timer1_Tick">
</asp:Timer>
</td></tr>
<tr><td>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="" ></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="timer1" EventName ="tick" />
</Triggers>
</asp:UpdatePanel>
</td></tr>
<tr><td></td></tr>
</table>
</div>
ASPX coding
public partial class UpdateNews : System.Web.UI.Page
{
DataRow dr;
int i = 1;
protected void Page_Load(object sender, EventArgs e)
{
if (!ScriptManager1.IsInAsyncPostBack)
Session["timeout"] = DateTime.Now.AddMinutes(120).ToString();
//GetNewValue();
}
protected void Timer1_Tick(object sender, EventArgs e)
{
if (0 > DateTime.Compare(DateTime.Now,
DateTime.Parse(Session["timeout"].ToString())))
{
i++;
GetNewValue();
}
}
public void GetNewValue()
{
DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("News.xml"));
DataTable dt = ds.Tables[0];
if (i <= dt.Rows.Count)
{
dr = dt.Rows[i - 1];
Label1.Text = dr["Title"].ToString();
}
else
{
if(i > dt.Rows.Count )
i = 1;
}
}
}
You can use time with update panel in asp.net web forms.
Following is the code :
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
</Triggers>
<ContentTemplate>
<!-- your content here, no timer -->
</ContentTemplate>
Things you want to do can be put in timer1_tick
I got the answer now my code is running properly.
But now When I put my page in content page I get an new error :-(
Please help me I need to clear this error at its earliest due to my deadline.
It say: cannot implicitly convert type 'string' to 'system.web.ui.webcontrols.label' at line 1
Where line 1 is
<%# Page Language="C#" MasterPageFile="~/Main.master" AutoEventWireup="true" CodeFile="Home.aspx.cs" Inherits="Home" Title="Untitled Page" %>
My working code is here :
HTML Code
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Timer ID="Timer1" runat="server" ontick="Timer1_Tick">
</asp:Timer>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Title" runat="server" Text=""></asp:Label>
<asp:Label ID="News" runat="server" Text=""></asp:Label>
<asp:Label ID="Counter" runat="server" Text="" ></asp:Label>
</ContentTemplate>
<Triggers><asp:AsyncPostBackTrigger ControlID="timer1" EventName ="tick" /></Triggers>
</asp:UpdatePanel>
ASPX Code:
public partial class Home : System.Web.UI.Page
{
DataRow dr;
int i = 1;
protected void Page_Load(object sender, EventArgs e)
{
if (!ScriptManager1.IsInAsyncPostBack)
Session["timeout"] = DateTime.Now.AddMinutes(100).ToString();
if (!string.IsNullOrEmpty(Counter.Text))
{
i = int.Parse(Counter.Text);
i++;
}
GetNewValue();
}
public void GetNewValue()
{
DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("News.xml"));
DataTable dt = ds.Tables[0];
if (i <= dt.Rows.Count)
{
dr = dt.Rows[i - 1];
Title.Text = dr["Title"].ToString();
News.Text = dr["Description"].ToString();
Counter.Text = i.ToString();
}
else
{
if (i > dt.Rows.Count)
i = 1;
Counter.Text = i.ToString();
}
}
protected void Timer1_Tick(object sender, EventArgs e)
{
if (0 > DateTime.Compare(DateTime.Now,
DateTime.Parse(Session["timeout"].ToString())))
{
GetNewValue();
}
}
}
My code was correct
Just error was I should not rename ID field of Labels in update panel.
I dont know why this happened.
But when I renamed my Title, counter,News label to label1 label2....
It worked properly and gave me my required result.
Thank you all for responding and trying to help me.
hello every one my problem goes like this
i have two updatepannels
<asp:UpdatePanel ID="new_word_panel_UpdatePanel" runat="server" UpdateMode="Conditional">
<ContentTemplate >
<asp:Panel ID='new_word_panel' runat="server">
<asp:Button ID='new_word_btn' runat="server" Text='give me a new word' Visible='false' OnClick='GenNewWord' />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
<ContentTemplate >
<asp:Button ID='Button8' runat="server" Text='hide' OnClick='hidegive' />
</ContentTemplate>
</asp:UpdatePanel>
the first updatepanel UpdateMode is set to Conditional so i can
update is content from the second updatepanel asp:Button ID='Button8' OnClick='hidegive'
event easily by using the Update() method.
this is the eventhandler:
protected void hidegive(object sender, EventArgs e)
{
if (new_word_btn.Visible == true)
new_word_btn.Visible = false;
else
new_word_btn.Visible = true;
**new_word_panel_UpdatePanel.Update();**
}
my problem is that i cant update the first UpdatePanel from reguler method on my page
although i am using the Update() method, i have try to update panel from this
method and nothing hapeens:
void PlayerWinEventHandler(object sender,Game.PlayerWinEventArgs e)
{
Session["score"] = int.Parse(Session["score"].ToString()) + 10;
UpdateScore();
if (new_word_btn.Visible == true)
new_word_btn.Visible = false;
else
new_word_btn.Visible = true;
new_word_btn.Text = "zibi";
**new_word_panel_UpdatePanel.Update();**
}
thanks for your help...
Why dont you use Triggers in your first update panel.
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button8" EventName="Click"/>
</Triggers>
I'm a newbie with ASP.NET, so probably my question is easy... but I'm wasting a lot of time with no success.
Part of my page is
<asp:UpdatePanel ID="pnlFileUpload" runat="server">
<ContentTemplate>
<ajaxToolkit:AsyncFileUpload ID="upload" runat="server" OnUploadedComplete="upload_UploadedComplete"
OnUploadedFileError="upload_UploadedFileError" UploaderStyle="Modern" UploadingBackColor="Yellow"
Width="400px" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="pnlFileError" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblFileError" runat="server" Text="errFile" Visible="false"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="upload" EventName="UploadedComplete" />
</Triggers>
</asp:UpdatePanel>
When user uploads (started with ajaxToolkit:AsyncFileUpload) ends, upload_UploadedComplete is called.
A sample code is:
protected void upload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
int size = upload.PostedFile.ContentLength;
if (size > maxsize)
{
lblFileError.Text = 'File too big...';
lblFileError.ForeColor = System.Drawing.Color.Red;
lblFileError.Visible = true;
pnlFileError.Update();
}
}
But lblFileError is never shown... why?!?
AsyncFileupload doesn't need updatePanel ( none of AJAx toolkit controls need ) . as they have it as a built in . remove fileupload UpdatePanel and test again
:
it seems you can't do that in this way . based on AjaxControlToolkitSampleSite to show user a message about uploading file you should use "ScriptManager.RegisterClientScriptBlock" as below :
protected void upload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
int size = upload.PostedFile.ContentLength;
if (size > maxsize)
{
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "error", "top.$get(\"" + lblFileError.ClientID + "\").innerHTML = 'File too big...';", true);
}
}