CheckBoxList.RepeatLayout 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取或设置一个值，该值指示是否将使用 table 元素、ul 元素、ol 元素或 span 元素来呈现列表。

public:
 virtual property System::Web::UI::WebControls::RepeatLayout RepeatLayout { System::Web::UI::WebControls::RepeatLayout get(); void set(System::Web::UI::WebControls::RepeatLayout value); };
[System.ComponentModel.Bindable(true)]
public virtual System.Web.UI.WebControls.RepeatLayout RepeatLayout { get; set; }
public virtual System.Web.UI.WebControls.RepeatLayout RepeatLayout { get; set; }
[<System.ComponentModel.Bindable(true)>]
member this.RepeatLayout : System.Web.UI.WebControls.RepeatLayout with get, set
member this.RepeatLayout : System.Web.UI.WebControls.RepeatLayout with get, set
Public Overridable Property RepeatLayout As RepeatLayout

属性值

RepeatLayout

指定是否将使用 table 元素、ul 元素、ol 元素或 span 元素来呈现列表的值。 默认值为 Table。

属性
BindableAttribute

例外

ArgumentOutOfRangeException

指定的布局不是 RepeatLayout 值之一。

示例

下面的代码示例演示如何使用 RepeatLayout 属性更改控件呈现的 CheckBoxList HTML。

注意

以下代码示例使用单文件代码模型，如果直接复制到代码隐藏文件中，可能无法正常工作。 必须将每个代码示例复制到扩展名为 .aspx 的空文本文件中。 有关Web Forms代码模型的详细信息，请参阅 ASP.NET Web Forms 页代码模型。


<%@ 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 runat="server">
    <title> CheckBoxList RepeatLayout Example </title>
<script runat="server">

      void Check_Clicked(Object sender, EventArgs e) 
      {

         Message.Text = "Selected Item(s):<br /><br />";

         // Iterate through the Items collection of the CheckBoxList
         // control and display the selected items.
         for (int i=0; i<checkboxlist1.Items.Count; i++)
         {

            if (checkboxlist1.Items[i].Selected)
            {

               Message.Text += checkboxlist1.Items[i].Text + "<br />";

            }

         }

      }

      void Index_Change(Object sender, EventArgs e) 
      {

         // Set the layout (table or flow) of the CheckBoxList control.
         checkboxlist1.RepeatLayout = (RepeatLayout)List.SelectedIndex;

      }

   </script>
 
</head>

<body>
   
   <form id="form1" runat="server">
 
      <h3> CheckBoxList RepeatLayout Example </h3>

      Select items from the CheckBoxList.

      <br /><br />

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Table"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           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:CheckBoxList>
 
      <br /><br />

      <asp:label id="Message" runat="server"/>

      <hr />

      Select whether to display the CheckBoxList control in 
      table or flow layout.

      <table cellpadding="5">

         <tr>

            <td>

               RepeatLayout:

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="List"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Index_Change"
                    runat="server">

                  <asp:ListItem Selected="True">Table</asp:ListItem>
                  <asp:ListItem>Flow</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
             
   </form>
          
</body>

</html>


<%@ 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 runat="server">
    <title> CheckBoxList RepeatLayout Example </title>
<script runat="server">

      Sub Check_Clicked(sender as Object, e As EventArgs) 

         Message.Text = "Selected Item(s):<br /><br />"

         ' Iterate through the Items collection of the CheckBoxList
         ' control and display the selected items.
         Dim i As Integer

         For i=0 To checkboxlist1.Items.Count - 1

            If checkboxlist1.Items(i).Selected Then

               Message.Text &= checkboxlist1.Items(i).Text & "<br />"

            End If

         Next

      End Sub

      Sub Index_Change(sender as Object, e As EventArgs) 

         ' Set the layout (table or flow) of the CheckBoxList control.
         checkboxlist1.RepeatLayout = CType(List.SelectedIndex, RepeatLayout)

      End Sub

   </script>
 
</head>

<body>
   
   <form id="form1" runat="server">
 
      <h3> CheckBoxList RepeatLayout Example </h3>

      Select items from the CheckBoxList.

      <br /><br />

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Table"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           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:CheckBoxList>
 
      <br /><br />

      <asp:label id="Message" runat="server"/>

      <hr />

      Select whether to display the CheckBoxList control in 
      table or flow layout.

      <table cellpadding="5">

         <tr>

            <td>

               RepeatLayout:

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="List"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Index_Change"
                    runat="server">

                  <asp:ListItem Selected="True">Table</asp:ListItem>
                  <asp:ListItem>Flow</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
             
   </form>
          
</body>

</html>

注解

有关可用选项的信息，请参阅 RepeatLayout 枚举。

注意

自 ASP.NET 4 起，有两个选项是新的： OrderedList 和 UnorderedList。

某些 RepeatLayout 设置不允许水平布局。 有关详细信息，请参见 RepeatLayout 枚举。

适用于

另请参阅