HotSpotCollection.Item[Int32] 屬性

public:
 property System::Web::UI::WebControls::HotSpot ^ default[int] { System::Web::UI::WebControls::HotSpot ^ get(int index); };

public System.Web.UI.WebControls.HotSpot this[int index] { get; }

member this.Item(int) : System.Web.UI.WebControls.HotSpot

Default Public ReadOnly Property Item(index As Integer) As HotSpot

參數

屬性值

集合 HotSpot 中 HotSpotCollection 指定索引的物件。

範例

以下程式碼範例示範如何利用該Item[]屬性直接存取HotSpot控制項ImageMap集合中包含的HotSpotCollection物件，並在頁面上以標籤顯示每個物件屬性的AlternateText值。 為了讓這個範例正常運作，你必須為該屬性提供自己的影像 ImageUrl ，並適當更新影像的路徑，讓應用程式能夠找到它。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server" language="C#">

  void Page_Load(object sender, EventArgs e)
  {
    // Use the indexer to access each object in the 
    // HotSpotCollection and display the value of
    // its AlternateText property to the user. 
    for (int i = 0; i <= Shop.HotSpots.Count - 1; i++)
    {
      Label1.Text += "<br />" + Shop.HotSpots[i].AlternateText + "<br />";
    }  
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
  <title>HotSpotCollection.Item Property Example</title>
</head>
  <body>
    <form id="Form1" runat="server">
    
      <h3>HotSpotCollection.Item Property Example</h3>
      
      <h4>Shopping Choices:</h4>
      
      <asp:imagemap id="Shop"           
        imageurl="Images/ShopChoice.jpg" 
        alternatetext="Shopping choices"
        runat="Server">    
        
        <asp:circlehotspot
          navigateurl="http://www.tailspintoys.com"
          x="145"
          y="120"
          radius="75"
          hotspotmode="Navigate"
          alternatetext="Shop for toys">           
        </asp:circlehotspot> 
        
        <asp:circlehotspot
          navigateurl="http://www.cohowinery.com"
          x="145"
          y="290"
          radius="75"
          hotspotmode="Navigate"
          alternatetext="Shop for wine">
        </asp:circlehotspot>     
          
      </asp:imagemap> 
      
      <asp:label id="Label1"
        runat="Server">
      </asp:label>      
                 
    </form>      
  </body>
</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server" language="vb">
  
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    
    ' Use the Item property to access each object in the 
    ' HotSpotCollection and display the value of
    ' its AlternateText property to the user. 
    For i As Integer = 0 To Shop.HotSpots.Count - 1
      Label1.Text += "<br />" + Shop.HotSpots.Item(i).AlternateText + "<br />"
    Next
  
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
  <title>HotSpotCollection.Item Property Example</title>
</head>
  <body>
    <form id="Form1" runat="server">
    
      <h3>HotSpotCollection.Item Property Example</h3>
      
      <h4>Shopping Choices:</h4>
      
      <asp:imagemap id="Shop"           
        imageurl="Images/ShopChoice.jpg" 
        alternatetext="Shopping choices"
        runat="Server">    
        
        <asp:circlehotspot
          navigateurl="http://www.tailspintoys.com"
          x="145"
          y="120"
          radius="75"
          hotspotmode="Navigate"
          alternatetext="Shop for toys">           
        </asp:circlehotspot> 
        
        <asp:circlehotspot
          navigateurl="http://www.cohowinery.com"
          x="145"
          y="290"
          radius="75"
          hotspotmode="Navigate"
          alternatetext="Shop for wine">
        </asp:circlehotspot>     
          
      </asp:imagemap> 
      
      <asp:label id="Label1"
        runat="Server">
      </asp:label>      
                 
    </form>      
  </body>
</html>

備註

使用此索引器使用陣列符號，存取 HotSpot 集合中指定的索引物件。 索引器允許你直接修改或替換集合中的物件 HotSpot 。

另請參閱

• HotSpot
• ImageMap
• ImageMap 網頁伺服器控制