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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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0
maddhacker24
Asked:
maddhacker24
  • 2
  • 2
1 Solution
 
Richard LeeSoftware EnthusiastCommented:
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
0
 
jagssiduralaCommented:
RightColumnContainer1.Attributes.CssStyle.Value = "RightColumnContainer1";

Change this code to

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


0
 
maddhacker24Author Commented:
Neither of those seem to work for me. hmmm
0
 
jagssiduralaCommented:
You need to write the class like this instead if using # use .(dot) for class names.

CSS
---------------------
.RightColumnContainer1
{
    background: url(/images/rightcolumn/LeftTab.gif);
}

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

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

Change this code to

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

Defenitly this will work
0
 
maddhacker24Author Commented:
Works like a charm.

Thank you
0

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