1. Write the following ASP.NET code in the code behind file:
void Page_load(object sender, EventArgs e)
{
Button1.Attributes.Add( “onclick”, “popWindow()” );
}
2. The .aspx page shoud contains popup JavaScript function:
<html>
<head>
<script>
function popWindow(){
window.open(‘https://www.yourdomain.com/yourpage.aspx’, ”, ”);”);
}
</script>
</head>
<body>
<form runat=”server”>
<asp:Button id=”Button1″ onclick=”Button1_Click” runat=”server” Text=”Run”></asp:Button>
</form>
</body>
</html>
When you click on the button the new popup Window will appear with the desired URL address.