RectangleHotSpot Konstruktor

Definition

Namnområde:
System.Web.UI.WebControls
Sammansättning:
System.Web.dll

Initierar en ny instans av RectangleHotSpot klassen.

public:
 RectangleHotSpot();
public RectangleHotSpot();
Public Sub New ()

Exempel

I följande kodexempel visas hur du programmatiskt skapar två RectangleHotSpot objekt, anger deras egenskaper och lägger till dem i ImageMap kontrollens HotSpotCollection samling. För att det här exemplet ska fungera korrekt måste du ange en egen avbildning för ImageUrl egenskapen och uppdatera sökvägen till avbildningen på lämpligt sätt så att programmet kan hitta den.

<%@ 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>

Kommentarer

Använd den här konstruktorn för att initiera en ny instans av RectangleHotSpot klassen.

Gäller för

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