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RadioButtonList Web 服务器控件声明性语法

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更新：2007 年 11 月

创建一组单选按钮。此控件支持绑定到数据源。

<asp:RadioButtonList
    AccessKey="string"
    AppendDataBoundItems="True|False"
    AutoPostBack="True|False"
    BackColor="color name|#dddddd"
    BorderColor="color name|#dddddd"
    BorderStyle="NotSet|None|Dotted|Dashed|Solid|Double|Groove|Ridge|
        Inset|Outset"
    BorderWidth="size"
    CausesValidation="True|False"
    CellPadding="integer"
    CellSpacing="integer"
    CssClass="string"
    DataMember="string"
    DataSource="string"
    DataSourceID="string"
    DataTextField="string"
    DataTextFormatString="string"
    DataValueField="string"
    Enabled="True|False"
    EnableTheming="True|False"
    EnableViewState="True|False"
    Font-Bold="True|False"
    Font-Italic="True|False"
    Font-Names="string"
    Font-Overline="True|False"
    Font-Size="string|Smaller|Larger|XX-Small|X-Small|Small|Medium|
        Large|X-Large|XX-Large"
    Font-Strikeout="True|False"
    Font-Underline="True|False"
    ForeColor="color name|#dddddd"
    Height="size"
    ID="string"
    OnDataBinding="DataBinding event handler"
    OnDataBound="DataBound event handler"
    OnDisposed="Disposed event handler"
    OnInit="Init event handler"
    OnLoad="Load event handler"
    OnPreRender="PreRender event handler"
    OnSelectedIndexChanged="SelectedIndexChanged event handler"
    OnTextChanged="TextChanged event handler"
    OnUnload="Unload event handler"
    RepeatColumns="integer"
    RepeatDirection="Horizontal|Vertical"
    RepeatLayout="Table|Flow"
    runat="server"
    SelectedIndex="integer"
    SelectedValue="string"
    SkinID="string"
    Style="string"
    TabIndex="integer"
    TextAlign="Left|Right"
    ToolTip="string"
    ValidationGroup="string"
    Visible="True|False"
    Width="size"
>
            <asp:ListItem
                Enabled="True|False"
                Selected="True|False"
                Text="string"
                Value="string"
            />
</asp:RadioButtonList>

备注

RadioButtonList 控件使您能够创建单项选择的单选按钮组，可以通过绑定到数据源动态生成这个组。若要指定要在 RadioButtonList 控件中显示的项，请针对每项在 RadioButtonList 控件的开始标记和结束标记之间放置一个 ListItem 元素。

说明：

还可以使用 RadioButton 控件。对于使用数据绑定创建一组单选按钮，RadioButtonList 控件更方便，而单个 RadioButton 控件则可以更好地控制布局。

RadioButtonList 控件还支持数据绑定。若要将控件绑定到数据源，请首先创建数据源（如 ArrayList 对象），该数据源包含要显示在控件中的项。下一步，使用 DataBind 方法将数据源绑定到 RadioButtonList 控件。使用 DataTextField 和 DataValueField 属性分别指定数据源中哪个字段绑定到控件中每个列表项的 Text 和 Value 属性。现在，RadioButtonList 控件将显示数据源中的信息。

若要确定 RadioButtonList 控件中的选定项，请循环访问 Items 集合并测试该集合中每一项的 Selected 属性。

可以使用 RepeatLayout 和 RepeatDirection 属性指定如何呈现列表。如果将 RepeatLayout 设置为 Table（默认设置），将以表格形式呈现列表。如果将它设置为 Flow，则不会使用任何表格结构呈现列表。默认情况下，RepeatDirection 设置为 Vertical。将此属性设置为 Horizontal 可以水平呈现该列表。

警告：

文本在 RadioButtonList 控件中显示之前并非 HTML 编码形式。这使得可以在文本中的 HTML 标记中嵌入脚本。如果控件的值是由用户输入的，请务必要对输入值进行验证以防止出现安全漏洞。

有关 RadioButtonList Web 服务器控件的属性和事件的详细信息，请参见 RadioButtonList 类文档。

示例

下面的示例演示如何使用 RadioButtonList 控件向用户显示一组互相排斥的选项。

<%@ Page Language="VB" AutoEventWireup="True" %>
<!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>
    <title>RadioButtonList Example</title>
<script language="VB" runat="server">

    Sub Button1_Click(Source As Object, e As EventArgs)
        If RadioButtonList1.SelectedIndex > - 1 Then
            Label1.Text = "You selected: " & RadioButtonList1.SelectedItem.Text
        End If
    End Sub

    Sub chkLayout_CheckedChanged(sender As Object, e As EventArgs)        
        If chkLayout.Checked = True Then
            RadioButtonList1.RepeatLayout = RepeatLayout.Table
        Else
            RadioButtonList1.RepeatLayout = RepeatLayout.Flow
        End If
    End Sub

    Sub chkDirection_CheckedChanged(sender As Object, e As EventArgs)        
        If chkDirection.Checked = True Then
            RadioButtonList1.RepeatDirection = RepeatDirection.Horizontal
        Else
            RadioButtonList1.RepeatDirection = RepeatDirection.Vertical
        End If
    End Sub

     </script>

 </head>
 <body>

     <h3>RadioButtonList Example</h3>

     <form id="form1" runat="server">

         <asp:RadioButtonList id="RadioButtonList1" runat="server">
            <asp:ListItem>Item 1</asp:ListItem>
            <asp:ListItem>Item 2</asp:ListItem>
            <asp:ListItem>Item 3</asp:ListItem>
            <asp:ListItem>Item 4</asp:ListItem>
            <asp:ListItem>Item 5</asp:ListItem>
            <asp:ListItem>Item 6</asp:ListItem>
         </asp:RadioButtonList>

         <br />

         <asp:CheckBox id="chkLayout" OnCheckedChanged="chkLayout_CheckedChanged" Text="Display Table Layout" Checked="true" AutoPostBack="true" runat="server" />

         <br />

         <asp:CheckBox id="chkDirection" OnCheckedChanged="chkDirection_CheckedChanged" Text="Display Horizontally" AutoPostBack="true" runat="server" />

         <br />

         <asp:Button id="Button1" Text="Submit" onclick="Button1_Click" runat="server"/>

         <br />

         <asp:Label id="Label1" font-names="Verdana" font-size="8pt" runat="server"/>

     </form>

 </body>
 </html>


<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
    <title>RadioButtonList Example</title>
<script language="C#" runat="server">

        void Button1_Click(object Source, EventArgs e) 
        {
           if (RadioButtonList1.SelectedIndex > -1) 
           {  
              Label1.Text = "You selected: " + RadioButtonList1.SelectedItem.Text;
           }
        }

        void chkLayout_CheckedChanged(Object sender, EventArgs e) 
        {

           if (chkLayout.Checked == true) 
           {
              RadioButtonList1.RepeatLayout = RepeatLayout.Table;
           }
           else 
           {
              RadioButtonList1.RepeatLayout = RepeatLayout.Flow;
           }     
        }

        void chkDirection_CheckedChanged(Object sender, EventArgs e) 
        {

           if (chkDirection.Checked == true) 
           {
              RadioButtonList1.RepeatDirection = RepeatDirection.Horizontal;
           }
           else 
           {
              RadioButtonList1.RepeatDirection = RepeatDirection.Vertical;
           }  
        }

     </script>

 </head>
 <body>

     <h3>RadioButtonList Example</h3>

     <form id="form1" runat="server">

         <asp:RadioButtonList id="RadioButtonList1" runat="server">
            <asp:ListItem>Item 1</asp:ListItem>
            <asp:ListItem>Item 2</asp:ListItem>
            <asp:ListItem>Item 3</asp:ListItem>
            <asp:ListItem>Item 4</asp:ListItem>
            <asp:ListItem>Item 5</asp:ListItem>
            <asp:ListItem>Item 6</asp:ListItem>
         </asp:RadioButtonList>

         <br />

         <asp:CheckBox id="chkLayout" OnCheckedChanged="chkLayout_CheckedChanged" Text="Display Table Layout" Checked="true" AutoPostBack="true" runat="server" />

         <br />

         <asp:CheckBox id="chkDirection" OnCheckedChanged="chkDirection_CheckedChanged" Text="Display Horizontally" AutoPostBack="true" runat="server" />

         <br />

         <asp:Button id="Button1" Text="Submit" onclick="Button1_Click" runat="server"/>

         <br />

         <asp:Label id="Label1" font-names="Verdana" font-size="8pt" runat="server"/>

     </form>

 </body>
 </html>


<%@ Page Language="JScript" AutoEventWireup="True" %>
<!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>
    <title>RadioButtonList Example</title>
<script language="JScript" runat="server">

        function Button1_Click(Source : System.Object, e : EventArgs) 
        {
           if (RadioButtonList1.SelectedIndex > -1) 
           {  
              Label1.Text = "You selected: " + RadioButtonList1.SelectedItem.Text;
           }
        }

        function chkLayout_CheckedChanged(sender : System.Object, e : EventArgs) 
        {

           if (chkLayout.Checked == true) 
           {
              RadioButtonList1.RepeatLayout = RepeatLayout.Table;
           }
           else 
           {
              RadioButtonList1.RepeatLayout = RepeatLayout.Flow;
           }     
        }

        function chkDirection_CheckedChanged(sender : System.Object, e : EventArgs) 
        {

           if (chkDirection.Checked == true) 
           {
              RadioButtonList1.RepeatDirection = RepeatDirection.Horizontal;
           }
           else 
           {
              RadioButtonList1.RepeatDirection = RepeatDirection.Vertical;
           }  
        }

     </script>

 </head>
 <body>

     <h3>RadioButtonList Example</h3>

     <form id="form1" runat="server">

         <asp:RadioButtonList id="RadioButtonList1" runat="server">
            <asp:ListItem>Item 1</asp:ListItem>
            <asp:ListItem>Item 2</asp:ListItem>
            <asp:ListItem>Item 3</asp:ListItem>
            <asp:ListItem>Item 4</asp:ListItem>
            <asp:ListItem>Item 5</asp:ListItem>
            <asp:ListItem>Item 6</asp:ListItem>
         </asp:RadioButtonList>

         <br />

         <asp:CheckBox id="chkLayout" OnCheckedChanged="chkLayout_CheckedChanged" Text="Display Table Layout" Checked="true" AutoPostBack="true" runat="server" />

         <br />

         <asp:CheckBox id="chkDirection" OnCheckedChanged="chkDirection_CheckedChanged" Text="Display Horizontally" AutoPostBack="true" runat="server" />

         <br />

         <asp:Button id="Button1" Text="Submit" onclick="Button1_Click" runat="server"/>

         <br />

         <asp:Label id="Label1" font-name="Verdana" font-size="8pt" runat="server"/>

     </form>

 </body>
 </html>

请参见

参考

RadioButtonList

其他资源

Web 服务器控件语法