ASP.Net/Asp Control/ImageMap

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Get asp ImageMap event argument: post back value (VB.net)

   <source lang="csharp">

<%@ Page Language="VB" %> <script runat="server"> 

   Sub mapMenu_Click(ByVal sender As Object, ByVal e As ImageMapEventArgs)
       Select Case e.PostBackValue
           Case "ToUpper"
               txtText.Text = txtText.Text.ToUpper()
           Case "ToLower"
               txtText.Text = txtText.Text.ToLower()
           Case "Erase"
               txtText.Text = String.Empty
       End Select
   End Sub

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server"> 

   <title>ImageMap PostBack</title>

</head> <body> 

   <form id="form1" runat="server">

   <asp:ImageMap
       id="mapMenu"
       ImageUrl="http://www.nfex.ru/style/logo.png"
       HotSpotMode="PostBack"
       Runat="server" OnClick="mapMenu_Click">
       <asp:RectangleHotSpot
           PostBackValue="ToUpper"
           Left="0"
           Top="0"
           Right="100"
           Bottom="30"
           AlternateText="To Uppercase" />
       <asp:RectangleHotSpot
           PostBackValue="ToLower"
           Left="100"
           Top="0"
           Right="200"
           Bottom="30"
           AlternateText="To Uppercase" />
       <asp:RectangleHotSpot
           PostBackValue="Erase"
           Left="200"
           Top="0"
           Right="300"
           Bottom="30"
           AlternateText="To Uppercase" />
   </asp:ImageMap>
   
   

   
   <asp:TextBox
       id="txtText"
       TextMode="MultiLine"
       Columns="40"
       Rows="5"
       Runat="server" />
   

   </form>

</body> </html> 

      </source>


ImageMap HotSpots Alternate Text

   <source lang="csharp">

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="Default_aspx" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> 

   <title>Untitled Page</title>

</head> <body> 

   <form id="form1" runat="server">

       <asp:ImageMap ID="ImageMap1" 
                     runat="server" 
                     ImageUrl="yourImage.jpg" 
                     HotSpotMode="PostBack">
       <asp:CircleHotSpot
           HotSpotMode="PostBack" 
           X="103" 
           Y="26" 
           PostBackValue="PowerSwitch" 
           Radius="5" 
           AlternateText="Power Switch" />
           <asp:RectangleHotSpot 
                Top="48" 
                Bottom="242" 
                Left="30" 
                NavigateUrl="http://www.nfex.ru"
                Right="177" 
                HotSpotMode="Navigate" />
           <asp:PolygonHotSpot 
                Coordinates="2,73,12,73,23,87,12,30,92,30,83,87" 
                PostBackValue="Navigation"
                HotSpotMode="PostBack" />
</asp:ImageMap> 
   </form>

</body> </html> File: Default.aspx.vb

Partial Class Default_aspx 

   Inherits System.Web.UI.Page
   Protected Sub ImageMap1_Click(ByVal sender As Object, _
                 ByVal e As System.Web.UI.WebControls.ImageMapEventArgs) _
                 Handles ImageMap1.Click
       Dim str As String = "You have clicked " & e.PostBackValue
       Response.Write(str)
   End Sub
   Protected Sub Page_Load(ByVal sender As Object, _
                           ByVal e As System.EventArgs) _
                           Handles Me.Load
       ImageMap1.HotSpots(0).AlternateText = "A"
       ImageMap1.HotSpots(1).AlternateText = "B"
       ImageMap1.HotSpots(2).AlternateText = "C"
   End Sub

End Class 

</source>


Image map post back (C#)

   <source lang="csharp">

<%@ Page Language="C#" %> <script runat="server"> 

   protected void mapMenu_Click(object sender, ImageMapEventArgs e)
   {
       switch (e.PostBackValue)
       {
           case "ToUpper":
               txtText.Text = txtText.Text.ToUpper();
               break;
           case "ToLower":
               txtText.Text = txtText.Text.ToLower();
               break;
           case "Erase":
               txtText.Text = String.Empty;
               break;                                
       }
   }

</script> <html> <head> 

   <title>ImageMap PostBack</title>

</head> <body> 

   <form id="form1" runat="server">

   <asp:ImageMap
       id="mapMenu"
       width="300"
       height="200"
       ImageUrl="http://www.nfex.ru/style/logo.png"
       HotSpotMode="PostBack"
       Runat="server" OnClick="mapMenu_Click">
       <asp:RectangleHotSpot
           PostBackValue="ToUpper"
           Left="0"
           Top="0"
           Right="100"
           Bottom="30"
           AlternateText="To Uppercase" />
       <asp:RectangleHotSpot
           PostBackValue="ToLower"
           Left="100"
           Top="0"
           Right="200"
           Bottom="30"
           AlternateText="To Uppercase" />
       <asp:RectangleHotSpot
           PostBackValue="Erase"
           Left="200"
           Top="0"
           Right="300"
           Bottom="30"
           AlternateText="To Uppercase" />
   </asp:ImageMap>
   
   

   
   <asp:TextBox
       id="txtText"
       TextMode="MultiLine"
       Columns="40"
       Rows="5"
       Runat="server" />
   

   </form>

</body> </html> 

      </source>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Asp_Control/ImageMap&oldid=2174»