How to image refresh

Question

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Hi all

I have connected to my IP camera, but I have to press f5 to refresh it. Is there any way to refresh the camera image by itself. I don't want to refresh the hole webpage.

Thank you

Jimmy

Posted 13-Feb-13 11:26am

Member 9655777

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Comments

Richard C Bishop 13-Feb-13 17:27pm

You could use AJAX and do asynchronous postbacks to refresh a certain part of the page.

AspDotNetDev 13-Feb-13 18:01pm

How are you currently adding the image to the page? If it's a constant filename, such as "\\ip_camera\image.jpeg", you could just use JavaScript to keep changing the query string, such as "\\ip_camera\image.jpeg?version=88".

3 solutions

Solution 1

Hello,

You can ask the browser to automatically refresh your page using the Meta tag in the head section.

XML

<!DOCTYPE html>
<html>
    <head>
        <META HTTP-EQUIV="REFRESH" CONTENT="1">
    </head>
    <body>
        what ever you had before
    </body>
</html>

The value of CONTENT is the number of seconds for the auto refresh.

Valery.

Posted 13-Feb-13 13:13pm

Valery Possoz

Comments

Member 9655777 13-Feb-13 19:55pm

I tried it before, but it is refresh the whole webpage. I just need to refresh the image, like streaming image.

Solution 2

Place your image content inside Ajax UpdatePanel. And use Ajax timer to refresh the same content for regular interval of time.

Ex:

XML

<asp:ScriptManager runat="server" ID="ScriptManager1" />
        <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
        </asp:Timer>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
            </Triggers>
            <ContentTemplate>
                <asp:Label ID="Label1" runat="server"></asp:Label>
            </ContentTemplate>
        </asp:UpdatePanel>

c# code below..

C#

protected void Timer1_Tick(object sender, EventArgs e)
    {
        Label1.Text = DateTime.Now.ToShortTimeString().ToString();
    }

Above code will fetch current time for regular interval of 1 second. You place your code inside update panel and give time as much you wanted to refresh the content..
..

Posted 13-Feb-13 17:00pm

vinodkumarnie

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Member 9655777 · Accepted Answer · 2013-02-16T05:57:00

Solution 3

To refresh the image but not refresh the whole webpage.

HTML

<img src="url " id="reloader" onload="setTimeout('document.getElementById(\'reloader\').src=\'url\'+new Date().getMilliseconds()', 500)" />

url is link of the source.

Posted 16-Feb-13 5:57am

Member 9655777