通过

HotSpotCollection.RemoveAt(Int32) 方法

  • 参考

定义

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

从集合中移除位于指定索引位置的 HotSpot 对象。

public:
 void RemoveAt(int index);
public void RemoveAt (int index);
member this.RemoveAt : int -> unit
Public Sub RemoveAt (index As Integer)

参数

index
Int32

移除 HotSpot 对象的位置的数组索引。

示例

下面的代码示例演示如何以编程方式向控件添加两 CircleHotSpot 个 ImageMap 对象。 将这两 CircleHotSpot 个对象添加到集合后 HotSpotCollection ， RemoveAt 方法用于删除位于集合中第一个索引处的对象。 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 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";

    // 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 the HotSpot objects to the ImageMap's 
    // HotSpotCollection.            
    Shop.HotSpots.Add(Circle1);
    Shop.HotSpots.Add(Circle2);

    // Use the RemoveAt method to delete the HotSpot 
    // object at the first index in HotSpotCollection.
    Shop.HotSpots.RemoveAt(0);
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
  <title>HotSpotCollection.RemoveAt Example</title>
</head>
  <body>
    <form id="Form1" runat="server">
    
      <h3>HotSpotCollection.RemoveAt Example</h3>
      
      <h4>Shopping Choices:</h4>
      
      <asp:imagemap id="Shop"           
        imageurl="Images/ShopChoice.jpg"
        alternatetext="Shopping choices" 
        runat="Server">
      </asp:imagemap>
      
    </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 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"
           
    ' 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 the HotSpot objects to the ImageMap's 
    ' HotSpotCollection.            
    Shop.HotSpots.Add(Circle1)
    Shop.HotSpots.Add(Circle2)
    
    ' Use the RemoveAt method to delete the HotSpot 
    ' object at the first index in HotSpotCollection.
    Shop.HotSpots.RemoveAt(0)
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
  <title>HotSpotCollection.RemoveAt Example</title>
</head>
  <body>
    <form id="Form1" runat="server">
    
      <h3>HotSpotCollection.RemoveAt Example</h3>
      
      <h4>Shopping Choices:</h4>
      
      <asp:imagemap id="Shop"           
        imageurl="Images/ShopChoice.jpg"
        alternatetext="Shopping choices" 
        runat="Server">
      </asp:imagemap>
      
    </form>      
  </body>
</html>

注解

方法 RemoveAt 从集合中移除 HotSpot 位于指定索引位置的 对象。 若要按名称从集合中删除特定 HotSpot 对象，请使用 Remove 方法。

若要向集合添加新 HotSpot 对象，请使用 Add 或 Insert 方法。

适用于

另请参阅