DetailsView.ItemCreated Evento

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Si verifica quando viene creato un record in un controllo DetailsView.

public:
 event EventHandler ^ ItemCreated;
public event EventHandler ItemCreated;
member this.ItemCreated : EventHandler 
Public Custom Event ItemCreated As EventHandler

Tipo evento

EventHandler

Esempio

Nell'esempio di codice seguente viene illustrato come usare l'evento ItemCreated per aggiornare una riga del cercapersone personalizzata con le statistiche di paging correnti.


<%@ 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 CustomerDetailView_ItemCreated(Object sender, EventArgs e)
  {
    
    // Get the header row.
      DetailsViewRow headerRow = CustomerDetailView.HeaderRow;

    // Get the Label control that displays the current page information 
    // from the header row.
    Label pageNum = (Label)headerRow.FindControl("PageNumberLabel");

    if(pageNum != null)
    {
      // Update the Label control with the current page number.
        int page = CustomerDetailView.DataItemIndex + 1;
      pageNum.Text = "Page " + page.ToString ();
    }
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView HeaderTemplate Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView HeaderTemplate Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          allowpaging="true"
          onitemcreated="CustomerDetailView_ItemCreated"   
          runat="server">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
            
          <pagersettings Mode="NextPreviousFirstLast"/>  
            
          <headertemplate>
          
            <table width="100%">            
              <tr>
                <td align="left">
                  <asp:Image id="LogoImage"
                    imageurl="~\images\Logo.jpg"
                    AlternateText="Our logo" 
                    runat="server"/>
                </td>
                <td align="right" valign="bottom">
                  <asp:Label id="PageNumberLabel"
                    font-size="9"
                    forecolor="DodgerBlue"
                    runat="server"/>
                </td>
              </tr>            
            </table>
          
          </headertemplate>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
          InsertCommand="INSERT INTO [Customers]([CustomerID],
            [CompanyName], [Address], [City], [PostalCode], [Country]) 
            VALUES (@CustomerID, @CompanyName, @Address, @City, 
            @PostalCode, @Country)"

          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </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 CustomerDetailView_ItemCreated(ByVal sender As Object, _
        ByVal e As EventArgs)
        ' Get the header row.
        Dim headerRow As DetailsViewRow = CustomerDetailView.HeaderRow

        ' Get the Label control that displays the current page information 
        ' from the header row.
        Dim pageNum As Label = _
            CType(headerRow.FindControl("PageNumberLabel"), Label)

        If Not pageNum Is Nothing Then
    
            ' Update the Label control with the current page number.
            Dim page As Integer = CustomerDetailView.DataItemIndex + 1
            pageNum.Text = "Page " & page.ToString()
    
        End If
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView HeaderTemplate Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView HeaderTemplate Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          allowpaging="true"
          onitemcreated="CustomerDetailView_ItemCreated"   
          runat="server">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
            
          <pagersettings Mode="NextPreviousFirstLast"/>  
            
          <headertemplate>
          
            <table width="100%">            
              <tr>
                <td align="left">
                  <asp:Image id="LogoImage"
                    imageurl="~\images\Logo.jpg"
                    AlternateText="Our logo" 
                    runat="server"/>
                </td>
                <td align="right" valign="bottom">
                  <asp:Label id="PageNumberLabel"
                    font-size="9"
                    forecolor="DodgerBlue"
                    runat="server"/>
                </td>
              </tr>            
            </table>
          
          </headertemplate>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
          InsertCommand="INSERT INTO [Customers]([CustomerID],
            [CompanyName], [Address], [City], [PostalCode], [Country]) 
            VALUES (@CustomerID, @CompanyName, @Address, @City, 
            @PostalCode, @Country)"

          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

Commenti

L'evento ItemCreated viene generato ogni volta che viene creato un record in un DetailsView controllo . Ciò può verificarsi quando viene eseguito il rendering del controllo per la prima volta o quando l'utente passa a un altro record. È possibile usare questo evento per fornire un gestore eventi che esegue una routine personalizzata, ad esempio l'aggiunta di contenuto personalizzato a una riga, ogni volta che si verifica questo evento.

È possibile accedere alle righe di intestazione, piè di pagina e pager nel DetailsView controllo usando rispettivamente le HeaderRowproprietà , FooterRow, TopPagerRowo BottomPagerRow . Per accedere a una delle righe di dati, usare la Rows raccolta.

Per altre informazioni su come gestire gli eventi, vedere la gestione e generazione di eventi.

Si applica a

Vedi anche