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Image button with Javascript in a Datalist

Posted on 2009-03-30
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Medium Priority
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1,150 Views
Last Modified: 2012-05-06
I have a image button in a datalist.  What I want ot be able to do is change the image on a onclick.  I can get it working when the image buttons is out side the datalist but can't firgure out how to append my code.  Please find the code I've got so far attached below
<script type="text/javascript">
 
function ChangeImage()
    {
        var imgbtn=document.getElementById("ImageButton2");
        imgbtn.src="Images/cart.jpg";
    }
 
 
 
</script>
 
 
 
 <asp:ImageButton ID="ImageButton2" runat="server" 
                    ImageUrl="~/Images/barrels.jpg" /><input type="button" onclick="javascript:ChangeImage()" value="Click" />

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Question by:leap29
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6 Comments
 
LVL 16

Expert Comment

by:sunithnair
ID: 24017630
You can do it like this
<script type="text/javascript">
 
function ChangeImage(imgbtn)
    {
        imgbtn.src="Images/cart.jpg";
    }
 
 
 
</script>
 
 
 
 <asp:ImageButton ID="ImageButton2" runat="server" 
                    ImageUrl="~/Images/barrels.jpg" onclick="javascript:ChangeImage(this)" />
 

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Author Comment

by:leap29
ID: 24017689
Thanks fro the reply, I've tried the code you suggested but get this error
Compiler Error Message: CS1026: ) expected
 
<asp:ImageButton ID="ImageButton1" runat="server" onclick="javascript:ChangeImage(this)" - line that the error is on.
 
full code for image button
 
asp:LinkButton ID="LinkButton2" runat="server" 
                                    CommandArgument='<%# Bind("jobid") %>' CommandName="DetailsViewRedirect" 
                                    Font-Size="Small" ForeColor="#9966FF" oncommand="LinkButton2_Command"  
                                    style="font-weight: 700; font-size: medium;" 
                                    Text='<%# Bind("jobtitle") %>' onclick="LinkButton2_Click"></asp:LinkButton>
 
 
script tag 
 
<script type="text/javascript">
   
       function ChangeImage(imgbtn)
    {
        imgbtn.src="Images/cart2.jpg";
    }
   
</script>

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LVL 16

Expert Comment

by:sunithnair
ID: 24017751
Sorry it should be OnClientClick and not onclick

<asp:ImageButton ID="ImageButton1" runat="server" OnClientClick="javascript:ChangeImage(this)" />
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Author Comment

by:leap29
ID: 24017777
Thanks that seems to have worked although I have a small problem of when the page postback on the image button click the image changes back to it's orginally one.  Any suggestions on how to work around this?
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LVL 16

Accepted Solution

by:
sunithnair earned 2000 total points
ID: 24017855
You can do it like this
<script type="text/javascript">
    function ChangeImage(imgbtn)
    {
        imgbtn.src="Images/cart2.jpg";
        document.getElementById("<%=hdnImage.ClientID %>").value = imgbtn.id;
    }
    function SetImage()
    {
        var img = document.getElementById(document.getElementById("<%=hdnImage.ClientID %>").value);
        if(img != null)
            img.src = "Images/cart2.jpg";
    }
</script>
<body onload="SetImage();">
  <!-- YOUR CODE DATALIST AND ALL-->
   <asp:HiddenField ID="hdnImage" runat="server" />
</body>

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Author Comment

by:leap29
ID: 24017918
Thanks got that working now, however I think I may have gone about my problem the wrong the way.
I'm going to open another question with regards to this.  hopefully you can help me with that.  Thanks a lot for the help with this question.
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