<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css" >
.DefaultStyle {
background-color: Green;
}
.HoverStyle {
background-color: Purple;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:Label runat="server" ID="Label1" Width="250px" CssClass="DefaultStyle"
onmouseover="this.className='HoverStyle'"
onmouseout="this.className='DefaultStyle'">OnMouseOver for a Label control</asp:Label>
</form>
</body>
</html>
Set Label background color
Label1.Text = "Label background color";
Label1.BackColor = System.Drawing.Color.Blue;
Set Label background image
<asp:Label ID="Label2" runat="server" Text="Label background image" Style="background-image: url(background.jpg)"></asp:Label>
Javascript function
<script type="text/javascript">
function popup()
{
alert("I'm label control");
return false;
}
</script>
Add following line to “Page_Load”
Label1.Attributes.Add("onClick", "popup();");
Javascript function for hiding label
<script type="text/javascript">
function HideLabel()
{
document.getElementById('<%=Label1.ClientID%>').style.display = 'none';
return false;
}
</script>
Complete Source Code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript">
function HideLabel()
{
document.getElementById('<%=Label1.ClientID%>').style.display = 'none';
return false;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return HideLabel();"/>
</form>
</body>
</html>
Javascript function for changing label value
<script type="text/javascript">
function ChangeLabelValue()
{
document.getElementById("Label1").innerHTML = "new text value";
}
</script>
Complete Source Code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript">
function ChangeLabelValue()
{
document.getElementById("Label1").innerHTML = "new text value";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
<input id="Button1" type="button" value="Change Label Color" onclick="ChangeLabelValue();"/>
</form>
</body>
</html>