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CSS and Theme in ASP.NET 2.0 and VB.NET
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 VB.NET
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 Sub Page_PreInit(ByVal sender As Object, ByVal e As EventArgs) Handles Me.PreInit
Page.Theme = Request("ChooseTheme") End Sub 'Page_PreInit
'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.
Partial Class _Default
Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load End Sub Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As EventArgs) Handles Me.PreInit
Page.Theme = Request("ChooseTheme") End Sub 'Page_PreInit |
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