RectangleHotSpot Construtor
Definição
Inicializa uma nova instância da classe RectangleHotSpot.Initializes a new instance of the RectangleHotSpot class.
public:
RectangleHotSpot();
public RectangleHotSpot ();
Public Sub New ()
Exemplos
O exemplo de código a seguir demonstra como criar programaticamente dois RectangleHotSpot objetos, definir suas propriedades e adicioná-los à ImageMap coleção do controle HotSpotCollection .The following code example demonstrates how to programmatically create two RectangleHotSpot objects, set their properties, and add them to the ImageMap control's HotSpotCollection collection. Para que este exemplo funcione corretamente, você deve fornecer sua própria imagem para a ImageUrl propriedade e atualizar o caminho para a imagem de forma adequada para que o aplicativo possa localizá-la.For this example to work correctly, you must supply your own image for the ImageUrl property and update the path to the image appropriately so that the application can locate it.
<%@ 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 RectangleHotSpot.
RectangleHotSpot Rectangle1 = new RectangleHotSpot();
Rectangle1.Top = 0;
Rectangle1.Left = 0;
Rectangle1.Bottom = 200;
Rectangle1.Right = 200;
Rectangle1.PostBackValue = "Yes";
Rectangle1.AlternateText = "Vote yes";
// Programmatically create a second RectangleHotSpot.
RectangleHotSpot Rectangle2 = new RectangleHotSpot();
Rectangle2.Top = 0;
Rectangle2.Left = 201;
Rectangle2.Bottom = 200;
Rectangle2.Right = 400;
Rectangle2.PostBackValue = "No";
Rectangle2.AlternateText = "Vote no";
// Add the RectangleHotSpot objects to the
// Vote ImageMap control's HotSpotCollection.
Vote.HotSpots.Add(Rectangle1);
Vote.HotSpots.Add(Rectangle2);
}
void VoteMap_Clicked (Object sender, ImageMapEventArgs e)
{
string hotSpotType;
// When a user clicks the "Yes" hot spot,
// display the hot spot's name.
if (e.PostBackValue == "Yes")
{
hotSpotType = Vote.HotSpots[0].ToString ();
Message1.Text = "You selected " + hotSpotType + " " + e.PostBackValue + ".";
}
// When a user clicks the "No" hot spot,
// display the hot spot's name.
else if (e.PostBackValue == "No")
{
hotSpotType = Vote.HotSpots[1].ToString ();
Message1.Text = "You selected " + hotSpotType + " " + e.PostBackValue + ".";
}
else
{
Message1.Text = "You did not click a valid hot spot region.";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>RectangleHotSpot C# Constructor Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>RectangleHotSpot Constructor Example</h3>
<!-- Change or remove the width and height attributes as
appropriate for your image. -->
<asp:imagemap id="Vote"
imageurl="Images/VoteImage.jpg"
alternatetext="Voting choices"
hotspotmode="PostBack"
width="400"
height="200"
onclick="VoteMap_Clicked"
runat="Server">
</asp:imagemap>
<br />
<asp:label id="Message1"
runat="Server">
</asp:label>
</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 RectangleHotSpot.
Dim Rectangle1 As New RectangleHotSpot
Rectangle1.Top = 0
Rectangle1.Left = 0
Rectangle1.Bottom = 200
Rectangle1.Right = 200
Rectangle1.PostBackValue = "Yes"
Rectangle1.AlternateText = "Vote yes"
' Programmatically create a second RectangleHotSpot.
Dim Rectangle2 As New RectangleHotSpot
Rectangle2.Top = 0
Rectangle2.Left = 201
Rectangle2.Bottom = 200
Rectangle2.Right = 400
Rectangle2.PostBackValue = "No"
Rectangle2.AlternateText = "Vote no"
' Add the RectangleHotSpot objects to the
' Vote ImageMap control's HotSpotCollection.
Vote.HotSpots.Add(Rectangle1)
Vote.HotSpots.Add(Rectangle2)
End Sub
Sub VoteMap_Clicked(ByVal sender As Object, ByVal e As ImageMapEventArgs)
Dim hotSpotType As String
' When a user clicks the "Yes" hot spot,
' display the hot spot's name.
If (e.PostBackValue = "Yes") Then
hotSpotType = Vote.HotSpots(0).ToString()
Message1.Text = "You selected " & hotSpotType & " " & e.PostBackValue & "."
' When a user clicks the "No" hot spot,
' display the hot spot's name.
ElseIf (e.PostBackValue = "No") Then
hotSpotType = Vote.HotSpots(1).ToString()
Message1.Text = "You selected " & hotSpotType & " " & e.PostBackValue & "."
Else
Message1.Text = "You did not click in a valid hot spot region."
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>RectangleHotSpot VB Constructor Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>RectangleHotSpot Constructor Example</h3>
<!-- Change or remove the width and height attributes as
appropriate for your image. -->
<asp:imagemap id="Vote"
imageurl="Images/VoteImage.jpg"
alternatetext="Voting choices"
hotspotmode="PostBack"
width="400"
height="200"
onclick="VoteMap_Clicked"
runat="Server">
</asp:imagemap>
<br />
<asp:label id="Message1"
runat="Server">
</asp:label>
</form>
</body>
</html>
Comentários
Use este construtor para inicializar uma nova instância da RectangleHotSpot classe.Use this constructor to initialize a new instance of the RectangleHotSpot class.