asp:DropDownList 的一些属性

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使用 BorderStyle 属性为 Web 服务器控件指定边框样式。使用一个 BorderStyle 枚举值设置此属性。下表列出了可能的值。

边框样式

说明

NotSet

不设置边框样式。

None

无边框

Dotted

虚线边框。

Dashed

点划线边框。

Solid

实线边框。

Double

双实线边框。

Groove

用于凹陷边框外观的凹槽状边框。

Ridge

用于凸起边框外观的突起边框。

Inset

用于凹陷控件外观的内嵌边框。

Outset

用于凸起控件外观的外嵌边框。

<%@ Page language="c#" AutoEventWireup="true" %><%@ 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 void Page_Load(object sender, System.EventArgs e)    {        // Determine whether this is the first time the page is loaded;        // if so, load the drop-down lists with data.        if (!Page.IsPostBack)        {            // Create a ListItemCollection and add names of colors.            ListItemCollection colors = 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);            // Bind the colors collection to the borderColorList.            borderColorList.DataSource = colors;            borderColorList.DataBind();            // Create a ListItemCollection and the add names of             // the BorderStyle enumeration values.            ListItemCollection styles = new ListItemCollection();            foreach (string s in Enum.GetNames(typeof(BorderStyle)))            {                styles.Add(s);            }            // Bind the styles collection to the borderStyleList.            borderStyleList.DataSource = styles;            borderStyleList.DataBind();            // Create a ListItemCollection and add width values            // expressed in pixels (px).            ListItemCollection widths = new ListItemCollection();            for (int i = 0; i < 11; i++)            {                widths.Add(i.ToString() + "px");            }            // Bind the widths collection to the borderWidthList.            borderWidthList.DataSource = widths;            borderWidthList.DataBind();        }    }    // This method handles the SelectedIndexChanged event for borderColorList.    public void ChangeBorderColor(object sender, System.EventArgs e)    {        // Convert the color name string to an object of type Color,         // and set the Color as the new border color for Label1.        Label1.BorderColor = Color.FromName(borderColorList.SelectedItem.Text);    }    // This method handles the selectedIndexChanged event for boderStyleList.    public void ChangeBorderStyle(object sender, System.EventArgs e)    {        // Convert the style name string to a BorderStyle enumeration value,        // and set the BorderStyle as the new border style for Label1.        Label1.BorderStyle = (BorderStyle)Enum.Parse(typeof(BorderStyle),                              borderStyleList.SelectedItem.Text);    }    // This method handles the SelectedIndexChanged event for borderWidthList.    public void ChangeBorderWidth(object sender, System.EventArgs e)    {        // Convert the border width string to a object of type Unit,        // and set the Unit as the new border width for Label1.        Label1.BorderWidth = Unit.Parse(borderWidthList.SelectedItem.Text);    }    </script><html xmlns="http://www.w3.org/1999/xhtml" >    <head>    <title> Border Properties Example </title></head>    <body>        <form id="form1" runat="server">            <h3> Border Properties Example </h3>            <table border="0" cellpadding="6">                <tr>                    <td>                        <asp:Label Runat="server" BorderColor="Black"                             BorderStyle="Solid" BorderWidth="4px" ID="Label1"                             Text="Border Properties Example" Height="75"                             Width="200"><center><br />Border Properties Example                            </center></asp:Label>                    </td>                    <td>                        <asp:DropDownList Runat="server" ID="borderColorList"                             OnSelectedIndexChanged="ChangeBorderColor" AutoPostBack="True"                             EnableViewState="True"></asp:DropDownList>                        <br />                        <br />                        <asp:DropDownList Runat="server" ID="borderStyleList"                             OnSelectedIndexChanged="ChangeBorderStyle" AutoPostBack="True"                             EnableViewState="True"></asp:DropDownList>                        <br />                                    <br />                        <asp:DropDownList Runat="server" ID="borderWidthList"                             OnSelectedIndexChanged="ChangeBorderWidth" AutoPostBack="True"                            EnableViewState="True"></asp:DropDownList>                    </td>                </tr>            </table>        </form>    </body></html>