BulletedList.DisplayMode 属性

参考

定义

命名空间:: System.Web.UI.WebControls

程序集:: System.Web.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

获取或设置 BulletedList 控件中的列表内容的显示模式。

public:
 virtual property System::Web::UI::WebControls::BulletedListDisplayMode DisplayMode { System::Web::UI::WebControls::BulletedListDisplayMode get(); void set(System::Web::UI::WebControls::BulletedListDisplayMode value); };

public virtual System.Web.UI.WebControls.BulletedListDisplayMode DisplayMode { get; set; }

member this.DisplayMode : System.Web.UI.WebControls.BulletedListDisplayMode with get, set

Public Overridable Property DisplayMode As BulletedListDisplayMode

属性值

BulletedListDisplayMode

BulletedListDisplayMode 值之一。默认值为 Text。

例外

ArgumentOutOfRangeException

指定的类型不是 BulletedListDisplayMode 值之一。

示例

下面的代码示例演示如何创建控件 BulletedList 并设置 DisplayMode 属性。控件 ListBox 使用 BulletedListDisplayMode 枚举值填充。列表项内容的格式会根据用户从列表框中选择的显示模式而更改。

<%@ Page Language="C#" %>

<!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>DisplayMode Example</title>
<script runat="server">
  
  void Index_Changed(object sender, System.EventArgs e)
  {

      // Change the message displayed, based on 
      // the display mode selected from the list box.
      if (DisplayModeListBox.SelectedIndex > -1)
      {
          Message1.Text = "You chose: " + DisplayModeListBox.SelectedItem.Text;
      }

      // Change the display mode, based on 
      // the mode selected from the list box.
      switch (DisplayModeListBox.SelectedIndex) 
    {
          case 0:
              ItemsBulletedList.DisplayMode = BulletedListDisplayMode.Text;
              Message2.Text = "";
              break;
          case 1:
              ItemsBulletedList.DisplayMode = BulletedListDisplayMode.HyperLink;
              // Opens a new browser window to display the page linked to.
              ItemsBulletedList.Target = "_blank";
              Message2.Text = "";
              break;
          case 2:
              ItemsBulletedList.DisplayMode = BulletedListDisplayMode.LinkButton;
              break;
          default:
              throw new Exception("You did not select a valid display mode.");
              break;
      }

  }

  void ItemsBulletedList_Click(object sender, System.Web.UI.WebControls.BulletedListEventArgs e)
  {

      // Change the message displayed, based on the index
      // of the bulletedlist list item that was clicked.
      switch (e.Index) 
    {
          case 0:
              Message2.Text = "You  clicked list item 1.";
              break;
          case 1:
              Message2.Text = "You  clicked list item 2.";
              break;
          case 2:
              Message2.Text = "You  clicked list item 3.";
              break;
          default:
              throw new Exception("You did not click a valid list item.");
              break;
      }

  }

</script>

</head>
<body>

  <h3>DisplayMode Example</h3>

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

    <h3>BulletedListDisplayMode Example</h3>

    <p>
    <asp:BulletedList id="ItemsBulletedList" 
      BulletStyle="Disc"
      DisplayMode="Text" 
      OnClick="ItemsBulletedList_Click"
      runat="server">    
      <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
      <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
      <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList></p>

    <hr />

    <h4>Select from the list to change the display mode:</h4>
    <asp:ListBox id="DisplayModeListBox" 
      Rows="1"
      SelectionMode="Single"
      AutoPostBack="True"
      OnSelectedIndexChanged="Index_Changed"
      runat="server">
        <asp:ListItem>Text</asp:ListItem>
        <asp:ListItem>Hyperlink</asp:ListItem>
        <asp:ListItem>LinkButton</asp:ListItem>
    </asp:ListBox>

    <asp:Label id="Message1" 
      runat="server"
      AssociatedControlID="DisplayModeListBox"/><br /><br />

    <asp:Label id="Message2"
      runat="server"
      AssociatedControlID="DisplayModeListBox"/>

   </form>

</body>
</html>

<%@ Page Language="VB" %>

<!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>DisplayMode Example</title>
<script runat="server">

  Sub Index_Changed(ByVal sender As Object, ByVal e As System.EventArgs)

    ' Change the message displayed, based on 
    ' the display mode selected from the list box.
    If DisplayModeListBox.SelectedIndex > -1 Then
      Message1.Text = "You chose: " & DisplayModeListBox.SelectedItem.Text
    End If

    ' Change the display mode, based on 
    ' the mode selected from the list box.
    Select Case (DisplayModeListBox.SelectedIndex)
      Case 0
        ItemsBulletedList.DisplayMode = BulletedListDisplayMode.Text
        Message2.Text = ""
      Case 1
        ItemsBulletedList.DisplayMode = BulletedListDisplayMode.HyperLink
        ' Opens a new browser window to display the page linked to.
        ItemsBulletedList.Target = "_blank"
        Message2.Text = ""
      Case 2
        ItemsBulletedList.DisplayMode = BulletedListDisplayMode.LinkButton
      Case Else
        Throw New Exception("You did not select a valid display mode.")
    End Select

  End Sub

  Sub ItemsBulletedList_Click(ByVal sender As Object, _
                              ByVal e As System.Web.UI.WebControls.BulletedListEventArgs)

    ' Change the message displayed, based on the index
    ' of the bulletedlist list item that was clicked.
    Select Case (e.Index)
      Case 0
        Message2.Text = "You  clicked list item 1."
      Case 1
        Message2.Text = "You  clicked list item 2."
      Case 2
        Message2.Text = "You  clicked list item 3."
      Case Else
        Throw New Exception("You did not click a valid list item.")
    End Select

  End Sub

</script>

</head>
<body>

  <h3>DisplayMode Example</h3>

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

    <h3>BulletedListDisplayMode Example</h3>

    <p>
    <asp:BulletedList id="ItemsBulletedList" 
      BulletStyle="Disc"
      DisplayMode="Text" 
      OnClick="ItemsBulletedList_Click"
      runat="server">    
      <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
      <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
      <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList></p>

    <hr />

    <h4>Select from the list to change the display mode:</h4>
    <asp:ListBox id="DisplayModeListBox" 
      Rows="1"
      SelectionMode="Single"
      AutoPostBack="True"
      OnSelectedIndexChanged="Index_Changed"
      runat="server">
        <asp:ListItem>Text</asp:ListItem>
        <asp:ListItem>Hyperlink</asp:ListItem>
        <asp:ListItem>LinkButton</asp:ListItem>
    </asp:ListBox>

    <asp:Label id="Message1" 
      runat="server"
      AssociatedControlID="DisplayModeListBox"/><br /><br />

    <asp:Label id="Message2"
      runat="server"
      AssociatedControlID="DisplayModeListBox"/>

   </form>

</body>
</html>

注解

DisplayMode使用属性指定要应用于控件中BulletedList列表项内容的显示行为。属性 DisplayMode 是使用枚举值之一设置的 BulletedListDisplayMode 。下表列出了可能的值。

值	显示为
Text	文本。
HyperLink	链接。
LinkButton	链接按钮。

值 HyperLink 允许将列表内容显示为超链接。单击后，超链接将导航到 URL。 Value使用属性指定超链接导航到的 URL。

字段 LinkButton 允许您将列表内容显示为链接。 BulletedList.Click单击链接按钮时，使用事件发回服务器。

此属性的值存储在视图状态中。

适用于

BulletedList.DisplayMode 属性

定义

属性值

例外

示例

注解

适用于

另请参阅

反馈

其他资源