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CSS and Theme in ASP.NET 2.0 and C#
In this tutorial, we will show you how to use CSS and Theme to define the style of the page in ASP.NET 2.0 and C#.
We will use the namespace of System.Web.UI in this tutorial.
Please add two controls of labels, textboxs and buttons to the webpage page, and a control of dropdownlist to select color of controls in the page. Then please create theme folder of BlueTheme and PurpleTheme, and add Control.skin, Default.css to the folders.
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protected void Page_PreInit(object sender, EventArgs e)
{
Page.Theme = Request["ChooseTheme"]; }
'Control.skin of the BlueTheme
<asp:TextBox BackColor="#c4d4e0" ForeColor="#0b12c6" Runat="Server" />
<asp:Label ForeColor="#0b12c6" Runat="Server" />
<asp:Button BackColor="#c4d4e0" ForeColor="#0b12c6" Runat="Server" />
'Control.skin of the PurpleTheme
<asp:TextBox BackColor="#ccccff" ForeColor="#602bff" Runat="Server" />
<asp:Label ForeColor="#602bff" Runat="Server" />
<asp:Button BackColor="#ccccff" ForeColor="#602bff" Runat="Server" /> |
The front end Default.aspx page looks something like this:
<fieldset>
<legend>Asp.net2.0 Theme Demo</legend>
<table width="100%" cellpadding="0" cellspacing="0" border="0" class="tableStyle">
<tr>
<td colspan="2" align="center"> Select a theme of the page: <asp:dropdownlist id="ChooseTheme" runat="server" autopostback="true"> <asp:ListItem Value="BlueTheme">Select Color</asp:ListItem> <asp:ListItem Value="BlueTheme">Blue</asp:ListItem> <asp:ListItem Value="PorpleTheme">Purple</asp:ListItem> </asp:dropdownlist> </td> </tr><tr>
<td height="23px" class="tdStyle" colspan="2"></td> </tr> <tr>
<td align="center" height="52px" style="width: 513px; text-align: right;"> <asp:Label ID="Label1" runat="server" Text="Enter Your Name:" Width="141px"></asp:Label> </td> <td> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> </td> </tr> <tr>
<td align="center" height="52px" style="width: 513px; text-align: right;"> <asp:Label ID="Label2" runat="server" Text="Enter Your Nickname:" Width="164px"></asp:Label> </td> <td> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> </td> </tr> <tr>
<td align="center" height="50px" style="width: 513px; text-align: right;"> <asp:Button ID="Button1" runat="server" Text=" OK " /> </td> <td> <asp:Button ID="Button2" runat="server" Text="Cancel" /> </td> </tr> <tr>
<td height="23px" colspan="2"></td>
</tr>
<tr>
<td colspan="2"><br /><br /></td> </tr>
</fieldset> |
The flow for the code behind page as follows.
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e) { } protected void Page_PreInit(object sender, EventArgs e) {
Page.Theme = Request["ChooseTheme"]; } |
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