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maddhacker24Flag for United States of America

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Trying to change the CSS of a DIV by clicking an asp:linkbutton which also will trigger an UpdatePanel in Codebehind C#

I'm just coming up to speed using .NET 4. I'm trying to change the background image of a div that surrounds my updatepanel.  Whenever a user clicks on the asp:linkbuttons which are also my updatepanel triggers, the background image of the div should update.  I have attached what I have now but its not working.

thanks for your help
CSS
---------------------
#RightColumnContainer1
{
    background: url(/images/rightcolumn/LeftTab.gif);
}

#RightColumnContainer2
{
    background: url(/images/rightcolumn/MiddleTab.gif);
}

#RightColumnContainer3
{
    background: url(/images/rightcolumn/RightTab.gif);
}


default.aspx
----------------------------------
<div id="RightColumnContainer1" runat="server">
	<div><asp:LinkButton ID="lnkbtn1" runat="server" onclick="lnkbtn1_Click">Link 1</asp:LinkButton></div>
	<div><asp:LinkButton ID="lnkbtn2" runat="server" onclick="lnkbtn2_Click">Link 2</asp:LinkButton></div>
	<div><asp:LinkButton ID="lnkbtn3" runat="server" onclick="lnkbtn3_Click">Link 3</asp:LinkButton></div>
                    
	<asp:UpdatePanel ID="RightColumnUpdatePanel" runat="server">
   <ContentTemplate>
   	<div>
      	Database results go here              
      </div>
	</ContentTemplate>
	<Triggers>
		<asp:AsyncPostBackTrigger ControlID="lnkbtn1"/>
		<asp:AsyncPostBackTrigger ControlID="lnkbtn2"/>
		<asp:AsyncPostBackTrigger ControlID="lnkbtn3"/>
	</Triggers>
	</asp:UpdatePanel>
</div>


C# Codebehind
---------------------------------
protected void lnkbtn1_Click(object sender, EventArgs e)
{
	RightColumnContainer1.Attributes.CssStyle.Value = "RightColumnContainer1";
}
    
protected void lnkbtn2_Click(object sender, EventArgs e)
{
	RightColumnContainer1.Attributes.CssStyle.Value = "RightColumnContainer2";
}
    
protected void lnkbtn3_Click(object sender, EventArgs e)
{
	RightColumnContainer1.Attributes.CssStyle.Value = "RightColumnContainer3";      
}

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Avatar of Avodah
Avodah
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Since you are manipulating the styles server side and the UpdatePanel only updates its contents then the outer div would never update. Try including the div inside the update panel.

DaTribe
RightColumnContainer1.Attributes.CssStyle.Value = "RightColumnContainer1";

Change this code to

RightColumnContainer1.Attributes.Add("class", "RightColumnContainer1");


Avatar of maddhacker24

ASKER

Neither of those seem to work for me. hmmm
ASKER CERTIFIED SOLUTION
Avatar of jagssidurala
jagssidurala
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Works like a charm.

Thank you