Style Class
Represents the style of a Web server control.
Assembly: System.Web (in System.Web.dll)
'Declaration <AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ <AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ Public Class Style _ Inherits Component _ Implements IStateManager 'Usage Dim instance As Style
The Style class encapsulates the properties that control the appearance of a Web server control and can be applied to multiple Web server controls to provide a common appearance. You can specify the background color and font color of a control by setting the BackColor and ForeColor properties, respectively. On controls that can display a border, you can control the border width, the border style, and the border color by setting the BorderWidth, BorderStyle, and BorderColor properties. The size of a Web server control can also be specified by using the Height and Width properties.
| Topic | Location |
|---|---|
| How to: Set ASP.NET Server Control Style Properties Programmatically | Building ASP .NET Web Applications |
| How to: Set ASP.NET Server Control Style Properties Programmatically | Building ASP .NET Web Applications |
This example demonstrates how to use a Style object to change the style properties of multiple controls at once. Each time one of the Style property values changes, each control must call its ApplyStyle method. Note that not all the controls included support all the properties demonstrated. If a control does not support a particular property, the appearance of the control will not change when the property value is changed.
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The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Page Code Model. |
<!-- --> ... <%@ Page Language="VB" %> <%@ Import Namespace="System.Drawing" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> Private primaryStyle As New Style() Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) If Not Page.IsPostBack Then ' Add data to the borderColorList, ' backColorList, and foreColorList controls. Dim colors As New ListItemCollection() colors.Add(Color.Black.Name) colors.Add(Color.Blue.Name) colors.Add(Color.Green.Name) colors.Add(Color.Orange.Name) colors.Add(Color.Purple.Name) colors.Add(Color.Red.Name) colors.Add(Color.White.Name) colors.Add(Color.Yellow.Name) borderColorList.DataSource = colors borderColorList.DataBind() backColorList.DataSource = colors backColorList.DataBind() foreColorList.DataSource = colors foreColorList.DataBind() ' Add data to the borderStyleList control. Dim styles As New ListItemCollection() Dim styleType As Type = GetType(BorderStyle) Dim s As String For Each s In [Enum].GetNames(styleType) styles.Add(s) Next s borderStyleList.DataSource = styles borderStyleList.DataBind() ' Add data to the borderWidthList control. Dim widths As New ListItemCollection() Dim i As Integer For i = 0 To 10 widths.Add(i.ToString() & "px") Next i borderWidthList.DataSource = widths borderWidthList.DataBind() ' Add data to the fontNameList control. Dim names As New ListItemCollection() names.Add("Arial") names.Add("Courier") names.Add("Garamond") names.Add("Times New Roman") names.Add("Verdana") fontNameList.DataSource = names fontNameList.DataBind() ' Add data to the fontSizeList control. Dim fontSizes As New ListItemCollection() fontSizes.Add("Small") fontSizes.Add("Medium") fontSizes.Add("Large") fontSizes.Add("10pt") fontSizes.Add("14pt") fontSizes.Add("20pt") fontSizeList.DataSource = fontSizes fontSizeList.DataBind() ' Set primaryStyle as the style for each control. Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End If End Sub Sub ChangeBorderColor(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.BorderColor = _ Color.FromName(borderColorList.SelectedItem.Text) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeBackColor(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.BackColor = _ Color.FromName(backColorList.SelectedItem.Text) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeForeColor(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.ForeColor = _ Color.FromName(foreColorList.SelectedItem.Text) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeBorderStyle(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.BorderStyle = _ CType([Enum].Parse(GetType(BorderStyle), _ borderStyleList.SelectedItem.Text), BorderStyle) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeBorderWidth(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.BorderWidth = _ Unit.Parse(borderWidthList.SelectedItem.Text) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeFont(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.Font.Name = _ fontNameList.SelectedItem.Text Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub Sub ChangeFontSize(ByVal sender As Object, ByVal e As System.EventArgs) primaryStyle.Font.Size = _ FontUnit.Parse(fontSizeList.SelectedItem.Text) Label1.ApplyStyle(primaryStyle) ListBox1.ApplyStyle(primaryStyle) Button1.ApplyStyle(primaryStyle) Table1.ApplyStyle(primaryStyle) TextBox1.ApplyStyle(primaryStyle) End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Applied Style Example</title> </head> <body> <form id="form1" runat="server"> <div> <table cellpadding="6" border="0"> <tr> <td rowspan="10" style="border:solid 1px Gray"> <p> <asp:label id="Label1" Text="Border Properties Example" Runat="server"> Label Styles </asp:label> </p> <p> <asp:button id="Button1" runat="server" Text="Button Styles"> </asp:button> </p> <p> <asp:listbox id="ListBox1" Runat="server"> <asp:ListItem Value="0" Text="List Item 0"> </asp:ListItem> <asp:ListItem Value="1" Text="List Item 1"> </asp:ListItem> <asp:ListItem Value="2" Text="List Item 2"> </asp:ListItem> </asp:listbox> </p> <p> <asp:textbox id="TextBox1" Text="TextBox Styles" Runat="server"> </asp:textbox> </p> <p> <asp:table id="Table1" Runat="server"> <asp:TableRow> <asp:TableCell Text="(0,0)"></asp:TableCell> <asp:TableCell Text="(0,1)"></asp:TableCell> </asp:TableRow> <asp:TableRow> <asp:TableCell Text="(1,0)"></asp:TableCell> <asp:TableCell Text="(1,1)"></asp:TableCell> </asp:TableRow> </asp:table> </p> </td> <td align="right"> <asp:Label ID="Label2" runat="server" AssociatedControlID="borderColorList" Text="Border Color:"> </asp:Label> </td> <td> <asp:dropdownlist id="borderColorList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeBorderColor"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label3" Runat="server" AssociatedControlID="borderStyleList" Text="Border Style:"> </asp:Label> </td> <td> <asp:dropdownlist id="borderStyleList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeBorderStyle"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label4" Runat="server" AssociatedControlID="borderWidthList" Text="Border Width"> </asp:Label> </td> <td> <asp:dropdownlist id="borderWidthList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeBorderWidth"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label5" Runat="server" AssociatedControlID="backColorList" Text="Back Color:"> </asp:Label> </td> <td> <asp:dropdownlist id="backColorList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeBackColor"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label6" Runat="server" AssociatedControlID="foreColorList" Text="Foreground Color:"> </asp:Label> </td> <td> <asp:dropdownlist id="foreColorList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeForeColor"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label7" Runat="server" AssociatedControlID="fontNameList" Text="Font Name:"> </asp:Label> </td> <td> <asp:dropdownlist id="fontNameList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeFont"> </asp:dropdownlist> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label8" Runat="server" AssociatedControlID="fontSizeList" Text="Font Size:"> </asp:Label> </td> <td> <asp:dropdownlist id="fontSizeList" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="ChangeFontSize"> </asp:dropdownlist> </td> </tr> </table> </div> </form> </body> </html>
- AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand. Permission value: Minimal.
- AspNetHostingPermission
for operating in a hosted environment. Demand value: InheritanceDemand. Permission value: Minimal.
System.MarshalByRefObject
System.ComponentModel.Component
System.Web.UI.WebControls.Style
System.Web.UI.Design.DesignerAutoFormatStyle
System.Web.UI.WebControls.MenuItemStyle
System.Web.UI.WebControls.PanelStyle
System.Web.UI.WebControls.SubMenuStyle
System.Web.UI.WebControls.TableItemStyle
System.Web.UI.WebControls.TableSectionStyle
System.Web.UI.WebControls.TableStyle
System.Web.UI.WebControls.TreeNodeStyle
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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