- Open Visual Studio File -->New--> Website (Create Website)
- Add App_Code Folder
- Inside App_Code Folder Add Class (ThemeClass.cs)
- Add master Page
- Then Add Default .aspx Use Master Page
public class themeclass : System.Web.UI.Page
{
protected void Page_PreInit(object sender, EventArgs e)
{
if (Session["Theme"] != null)
{
Page.Theme = Session["Theme"].ToString();
}
}
}
I have Used inherited Class By Page
Default.aspx
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div>
<table class="tablecss" align="center" width="30%">
<tr>
<td colspan="2" align="center">
<h3>
Registration Form</h3>
</td>
</tr>
<tr>
<td align="right">
UserName:
</td>
<td>
<asp:TextBox ID="txtUser" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td align="right">
Email:
</td>
<td>
<asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td align="right">
Date of Birth:
</td>
<td>
<asp:TextBox ID="txtDOB" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td align="right">
Address:
</td>
<td>
<asp:TextBox ID="txtAddress" runat="server" Columns="17" Rows="8" TextMode="MultiLine"></asp:TextBox>
</td>
</tr>
</table>
</div>
</asp:Content>
Default.CS
public partial class _Default : themeclass
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
System.Web.UI.Page is replaced by Class Name
MasterPage
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
<!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>Untitled Page</title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<div id="header" runat="server" style="align: center">
<asp:DropDownList ID="ddlchangecolor" runat="server" OnSelectedIndexChanged="ddlchangecolor_SelectedIndexChanged"
OnTextChanged="ddlchangecolor_TextChanged">
<asp:ListItem Text="White" Value="White"></asp:ListItem>
<asp:ListItem Text="Blue" Value="Blue"></asp:ListItem>
<asp:ListItem Text="Red" Value="Red"></asp:ListItem>
<asp:ListItem Text="Purple" Value="Purple"></asp:ListItem>
</asp:DropDownList>
<asp:Button ID="btnBlue" runat="server" Text="Change Theme" BackColor="Blue" Font-Bold="true"
OnClick="btnBlue_Click" />
</div>
<%-- <asp:ScriptManager ID="ScriptManager1" runat="server" />--%>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
<div id="footer" runat="server">
</div>
</div>
</form>
</body>
</html>
MasterPage.CS
using System;
public partial class MasterPage : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void ddlchangecolor_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void btnBlue_Click(object sender, EventArgs e)
{
Session["Theme"] = ddlchangecolor.SelectedItem.Value.ToString().Trim();
Server.Transfer(Request.FilePath);
}
protected void ddlchangecolor_TextChanged(object sender, EventArgs e)
{
}
}
In The App_Theme Folder
Add Skin With Blue, Purple, Red , White
Add CSS With Every Skin
Blue.CSS Under Blue Folder
body
{
background-color:Blue;
}
Purple.CSS Under PurpleFolder
body
{
background-color:Purple;
}
Red.CSS Under Red Folder
body
{
background-color:Red;
}
White.CSS Under White Folder
body
{
background-color:White;
}
Happy Coding
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