BulletedList.AutoPostBack 属性
定义
重要
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获取或设置基类的 AutoPostBack 属性的值。
public:
virtual property bool AutoPostBack { bool get(); void set(bool value); };[System.ComponentModel.Browsable(false)]
public override bool AutoPostBack { get; set; }[<System.ComponentModel.Browsable(false)>]
member this.AutoPostBack : bool with get, setPublic Overrides Property AutoPostBack As Boolean属性值
false.
- 属性
例外
已尝试将值分配到 AutoPostBack。
示例
下面的代码示例演示 属性的值 AutoPostBack 始终 false 适用于 BulletedList 控件，因此不适用于此类。
<%@ 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>AutoPostBack Property Example</title>
<script language="c#" runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Get the value of AutoPostBack for this bulleted list.
bool value;
value = ItemsBulletedList.AutoPostBack;
// This property is not applicable to the BulletedList class.
// This message will never be displayed.
if(value)
{
Message.Text = "The value of the AutoPostBack property is True.";
}
// The default AutoPostBack value inherited from ListControl is False.
// This message will always be displayed.
if(!value)
{
Message.Text = "The value of the AutoPostBack property is " + value.ToString() + "."
+ "This property is inherited by the ListControl class."
+ "It is not applicable to the BulletedList class.";
}
}
</script>
</head>
<body>
<h3>AutoPostBack Property Example</h3>
<form id="form1" runat="server">
<asp:BulletedList id="ItemsBulletedList"
BulletStyle="Disc"
DisplayMode="Text"
runat="server">
<asp:ListItem Value="0">The first list item.</asp:ListItem>
<asp:ListItem Value="1">The second list item.</asp:ListItem>
<asp:ListItem Value="2">The third list item.</asp:ListItem>
<asp:ListItem Value="3">The fourth list item.</asp:ListItem>
</asp:BulletedList>
<p>
<asp:Label id="Message"
Font-Size="12"
Width="368px"
runat="server"/></p>
</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>AutoPostBack Property Example</title>
<script runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Dim value As Boolean
' Get the value of AutoPostBack for this bulleted list.
value = ItemsBulletedList.AutoPostBack
' This property is not applicable to the BulletedList class.
' This message will never be displayed.
If value = True Then
Message.Text = "The value of the AutoPostBack property is True."
End If
' The default AutoPostBack value inherited from ListControl is False.
' This message will always be displayed.
If value = False Then
Message.Text = "The value of the AutoPostBack property is " & value & "." _
& "This property is inherited by the ListControl class." _
& "It is not applicable to the BulletedList class."
End If
End Sub
</script>
</head>
<body>
<h3>AutoPostBack Property Example</h3>
<form id="form1" runat="server">
<asp:BulletedList id="ItemsBulletedList"
BulletStyle="Disc"
DisplayMode="Text"
runat="server">
<asp:ListItem Value="0">The first list item.</asp:ListItem>
<asp:ListItem Value="1">The second list item.</asp:ListItem>
<asp:ListItem Value="2">The third list item.</asp:ListItem>
<asp:ListItem Value="3">The fourth list item.</asp:ListItem>
</asp:BulletedList>
<p>
<asp:Label id="Message"
Font-Size="12"
Width="368px"
runat="server"/></p>
</form>
</body>
</html>
注解
属性 AutoPostBack 继承自 类， ListControl 不适用于 BulletedList 控件。 不要为 AutoPostBack 属性赋值。 如果确实向 赋值，AutoPostBackNotSupportedException则会引发异常。
