HotSpotCollection 类
定义
重要
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public ref class HotSpotCollection sealed : System::Web::UI::StateManagedCollectionpublic sealed class HotSpotCollection : System.Web.UI.StateManagedCollectiontype HotSpotCollection = class
inherit StateManagedCollectionPublic NotInheritable Class HotSpotCollection
Inherits StateManagedCollection- 继承
示例
下面的代码示例演示如何以编程方式创建控件，以及如何向其添加两CircleHotSpot个ImageMap对象。 该HotSpots属性用于访问控件的HotSpotCollectionImageMap集合，并将对象添加到CircleHotSpot该集合。 若要使此示例正常工作，必须为属性提供自己的映像 ImageUrl ，并相应地更新映像的路径，以便应用程序能够找到它。
<%@ page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Load (Object sender, EventArgs e)
{
// Programmatically create an ImageMap control.
ImageMap Shop = new ImageMap();
// Set properties on the ImageMap control.
Shop.ImageUrl = "Images/ShopChoice.jpg";
Shop.AlternateText = "Shopping choices";
// Add the ImageMap control to the
// Controls collection of the page.
Page.Controls.Add(Shop);
// Programmatically create a CircleHotSpot object.
CircleHotSpot Circle1 = new CircleHotSpot();
Circle1.HotSpotMode = HotSpotMode.Navigate;
Circle1.NavigateUrl = "http://www.tailspintoys.com";
Circle1.X = 145;
Circle1.Y = 120;
Circle1.Radius = 75;
Circle1.AlternateText = "Shop for toys";
// Add Circle1 to the ImageMap's HotSpotCollection.
Shop.HotSpots.Add(Circle1);
// Programmatically create a second CircleHotSpot object.
CircleHotSpot Circle2 = new CircleHotSpot();
Circle2.HotSpotMode = HotSpotMode.Navigate;
Circle2.NavigateUrl = "http://www.cohowinery.com";
Circle2.X = 145;
Circle2.Y = 290;
Circle2.Radius = 75;
Circle2.AlternateText = "Shop for wine";
// Add Circle2 to the ImageMap's HotSpotCollection.
Shop.HotSpots.Add(Circle2);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
<title>ImageMap Class C# Constructor Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>ImageMap Class C# Constructor Example</h3>
<h4>Shopping Choices:</h4>
</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">
<script runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Programmatically create an ImageMap control.
Dim Shop As New ImageMap
Shop.ImageUrl = "Images/ShopChoice.jpg"
Shop.AlternateText = "Shopping choices"
' Add the ImageMap control to the
' Controls collection of the page.
Page.Controls.Add(Shop)
' Programmatically create a CircleHotSpot object.
Dim Circle1 As New CircleHotSpot
Circle1.HotSpotMode = HotSpotMode.Navigate
Circle1.NavigateUrl = "http://www.tailspintoys.com"
Circle1.X = 145
Circle1.Y = 120
Circle1.Radius = 75
Circle1.AlternateText = "Shop for toys"
' Add Circle1 to the ImageMap's HotSpotCollection.
Shop.HotSpots.Add(Circle1)
' Programmatically create a second CircleHotSpot object.
Dim Circle2 As New CircleHotSpot
Circle2.HotSpotMode = HotSpotMode.Navigate
Circle2.NavigateUrl = "http://www.cohowinery.com"
Circle2.X = 145
Circle2.Y = 290
Circle2.Radius = 75
Circle2.AlternateText = "Shop for wine"
' Add Circle2 to the ImageMap's HotSpotCollection.
Shop.HotSpots.Add(Circle2)
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
<title>ImageMap Class VB Constructor Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>ImageMap Class VB Constructor Example</h3>
<h4>Shopping Choices:</h4>
</form>
</body>
</html>
注解
类 HotSpotCollection 表示一个集合，该集合使 ImageMap 控件能够维护它包含的对象的列表 HotSpot 。
Add使用该方法将指定HotSpot对象添加到序号索引数组末尾的集合。 Insert使用该方法将对象添加到HotSpot集合中的指定索引位置。 Item[]使用索引器通过简单的数组表示法直接访问HotSpot集合中的对象。
Remove使用该方法从集合末尾删除HotSpot对象。 RemoveAt使用该方法从指定的索引位置删除HotSpot对象。
构造函数
| HotSpotCollection() |
初始化 HotSpotCollection 类的新实例。 |
属性
| Count |
获取 StateManagedCollection 集合中包含的元素的数量。 (继承自 StateManagedCollection) |
| Item[Int32] |
获取 HotSpot 集合中位于指定索引位置的 HotSpotCollection 对象。 |
方法
显式接口实现
扩展方法
| Cast<TResult>(IEnumerable) |
将 IEnumerable 的元素强制转换为指定的类型。 |
| OfType<TResult>(IEnumerable) |
根据指定类型筛选 IEnumerable 的元素。 |
| AsParallel(IEnumerable) |
启用查询的并行化。 |
| AsQueryable(IEnumerable) |
将 IEnumerable 转换为 IQueryable。 |