BulletedListEventHandler Delegasikan

  • Referensi

Definisi

Ruang nama:
System.Web.UI.WebControls
Rakitan:
System.Web.dll

Mewakili metode yang akan menangani Click peristiwa BulletedList kontrol.

public delegate void BulletedListEventHandler(System::Object ^ sender, BulletedListEventArgs ^ e);
public delegate void BulletedListEventHandler(object sender, BulletedListEventArgs e);
type BulletedListEventHandler = delegate of obj * BulletedListEventArgs -> unit
Public Delegate Sub BulletedListEventHandler(sender As Object, e As BulletedListEventArgs)

Parameter

sender
Object

Sumber dari peristiwa tersebut.

e
BulletedListEventArgs

Argumen jenis BulletedListEventArgs yang berisi data peristiwa.

Contoh

Contoh berikut menunjukkan cara menentukan dan mengkodekan penanganan aktivitas untuk Click peristiwa BulletedList kontrol. Saat item daftar diklik, pesan ditampilkan dalam Label kontrol pada halaman.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>BulletedList Click Example</title>
  <script runat="server">

    void ItemsBulletedList_Click(object sender, System.Web.UI.WebControls.BulletedListEventArgs e)
    {

        // Change the message displayed in the label based on the index
        // of the list item that was clicked.
        switch (e.Index) 
      {
            case 0:
                Message.Text = "You clicked list item 1.";
                break;
            case 1:
                Message.Text = "You clicked list item 2.";
                break;
            case 2:
                Message.Text = "You clicked list item 3.";
                break;
            default:
                throw new Exception("You did not click a valid list item.");
                break;
        }

    }

  </script>

</head>
<body>

  <h3>BulletedList Click Example</h3>

  <form id="form1" runat="server">
            
    <p>Click on an item in the list to raise the Click event.</p> 
    
    <asp:BulletedList id="ItemsBulletedList" 
      BulletStyle="Disc"
      DisplayMode="LinkButton" 
      OnClick="ItemsBulletedList_Click"
      runat="server">    
        <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
        <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
        <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList>
            
    <asp:Label id="Message" 
      Font-Size="12"
      Width="168px" 
      Font-Bold="True" 
      runat="server"
      AssociatedControlID="ItemsBulletedList"/>
              
   </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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>BulletedList Click Example</title>
  <script runat="server">

    Sub ItemsBulletedList_Click(ByVal sender As Object, _
                                ByVal e As System.Web.UI.WebControls.BulletedListEventArgs)
      
      ' Change the message displayed in the label based on the index
      ' of the list item that was clicked.
      Select Case (e.Index)
        Case 0
          Message.Text = "You clicked list item 1."
        Case 1
          Message.Text = "You clicked list item 2."
        Case 2
          Message.Text = "You clicked list item 3."
        Case Else
          Throw New Exception("You did not click a valid list item.")
      End Select

    End Sub

    </script>

</head>
<body>

  <h3>BulletedList Click Example</h3>

  <form id="form1" runat="server">
            
    <p>Click on an item in the list to raise the Click event.</p> 
    
    <asp:BulletedList id="ItemsBulletedList" 
      BulletStyle="Disc"
      DisplayMode="LinkButton" 
      OnClick="ItemsBulletedList_Click"
      runat="server">    
        <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
        <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
        <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList>
            
    <asp:Label id="Message" 
      Font-Size="12"
      Width="168px" 
      Font-Bold="True" 
      runat="server"
      AssociatedControlID="ItemsBulletedList"/>
              
   </form>

</body>
</html>

Keterangan

Saat Membuat BulletedListEventHandler delegasi, Anda mengidentifikasi metode yang akan menangani Click peristiwa BulletedList kontrol. Untuk mengaitkan peristiwa dengan penanganan aktivitas Anda, tambahkan instans delegasi ke peristiwa. Penanganan aktivitas dipanggil setiap kali peristiwa terjadi, kecuali Anda menghapus delegasi. Untuk informasi selengkapnya tentang delegasi penanganan aktivitas, lihat Menangani dan Menaikkan Peristiwa.

Metode Ekstensi

GetMethodInfo(Delegate)

Mendapatkan objek yang mewakili metode yang diwakili oleh delegasi yang ditentukan.

Berlaku untuk

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