How to show an image dynamicaly tghrough javascript function

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hello everyone,

      I want to show image in a website, in which image should be selected dynamically from the database.....through a javascript function.....i am using <img> tag inside <item template> of a datalist......i had bind datalist through datasource......following isa the codea-behind for datalist......



<pre lang="cs">con.Open();
        cmd = new OleDbCommand(&quot;Select ID, PrjctName, Description, Facility, Status from Project&quot;, con);
        da = new OleDbDataAdapter(cmd);
        ds = new DataSet();
        da.Fill(ds);
        List_cmpltd.DataSource = ds;
        List_cmpltd.DataBind();
        con.Close();</pre>


this code is working properly.....
& following is the code for datalist in .aspx page.......


<pre lang="xml">&lt;asp:DataList runat=&quot;server&quot; ID=&quot;List_cmpltd&quot;&gt;
                    &lt;ItemTemplate&gt;
 &lt;td style="text-decoration: blink" valign="top"&gt;

                    &lt;div onload="fun('&lt;%# Eval("Status")%&gt;')"&gt;
                    &lt;img src='' id="img1" name="img1" alt="" width="100" height="50" /&gt;
                    &lt;/a&gt;
                   &lt;/div&gt;

            <pre>        &lt;table cellpadding=&quot;0&quot; cellspacing=&quot;0&quot;&gt;</pre>


<pre lang="xml">&lt;/tr&gt;
                    &lt;/table&gt;
                    &lt;/ItemTemplate&gt;
                    &lt;SeparatorTemplate&gt;&lt;/SeparatorTemplate&gt;
                    &lt;/asp:DataList&gt;</pre>



& following isa the javasacript function i hv used for that......



<pre>&lt;script type="text/javascript"&gt;
    &lt;!--
    function fun(str)
    {
    if(str=="Completed")
    {
    img1.src= 'images/cmpltd.gif';
    }
    else if(str=="Current")
    {
    img1.src= 'images/crnt.gif';
    }
    else if(str=="Upcoming")
    {
    img1.src= 'images/upcmng.gif';
    }
    else
    {
    img1.src= 'images/plan.gif';
    }
    //--&gt;
    &lt;/script&gt;</pre>
/

Posted 15-Nov-11 16:18pm

abhishekagrwl25

Updated 15-Nov-11 16:20pm

v2

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shashikanth 2011 · Answer 1 · 2011-11-15T19:48:00

As Mr.Zaibshah said, How can you get the object if Image directly, You have to get Element of Image And set The Source Address..

JavaScript

var img=document.getElementById("img1")

And while setting image Src, How you get The Address of image, And where Does the Images folder located(if it is within your project then "/images/image1.jpg").

Zubair Alie · Answer 2 · 2011-11-15T19:27:00

Solution 1

you can not use .net objects or properties in javascript unless you declare them globally.
in your case, you are accessing 'img1' directly, the javascript doesn't know that what it is.
you need to get img1 in var object to use it. i.e

JavaScript

var img = document.getElementById("img1");
img.src = "imagePath";

Try it this way

Posted 15-Nov-11 19:27pm

Zubair Alie

Comments

ujjwal uniyal 16-Nov-11 3:12am

still not working...it is not showing any image.....
i have changed the java script code to the following......

<script type="text/javascript">

</script>