DetailsView.ModeChanged Ereignis

  • Referenz

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Tritt ein, wenn ein DetailsView-Steuerelement versucht, zwischen dem Bearbeitungsmodus, Einfügemodus und dem schreibgeschützten Modus zu wechseln, allerdings erst, nachdem die CurrentMode-Eigenschaft aktualisiert wurde.

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

Ereignistyp

EventHandler

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie das ModeChanged Ereignis verwendet wird, um den aktuellen Modus in der Headerzeile anzuzeigen.


<%@ 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_ModeChanged(Object sender, EventArgs e)
  {
    // Display the current mode in the header row.
      switch (CustomerDetailView.CurrentMode)
    {
      case DetailsViewMode.Edit:
        CustomerDetailView.HeaderText = "Edit Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Red;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.LightGray;
        break;
      case DetailsViewMode.Insert:
        CustomerDetailView.HeaderText = "Insert Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Green;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.Yellow;
        break;
      case DetailsViewMode.ReadOnly:
        CustomerDetailView.HeaderText = "Read-Only Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Blue;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.White;
        break;
      default:
          CustomerDetailView.HeaderText = "Error!";
        break;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanged Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanged Example</h3>      
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          autogenerateinsertbutton="true"  
          allowpaging="true"
          headertext="Read-Only Mode" 
          onmodechanged="CustomerDetailView_ModeChanged" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
            
          <headerstyle forecolor="Blue"/>
                    
        </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_ModeChanged(ByVal sender As Object, ByVal e As EventArgs)
  
        ' Display the current mode in the header row.
        Select Case CustomerDetailView.CurrentMode

            Case DetailsViewMode.Edit
                CustomerDetailView.HeaderText = "Edit Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Red
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.LightGray

            Case DetailsViewMode.Insert
                CustomerDetailView.HeaderText = "Insert Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Green
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.Yellow

            Case DetailsViewMode.ReadOnly
                CustomerDetailView.HeaderText = "Read-Only Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Blue
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.White

            Case Else
                CustomerDetailView.HeaderText = "Error!"
        
        End Select
    
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanged Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanged Example</h3>      
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          autogenerateinsertbutton="true"  
          allowpaging="true"
          headertext="Read-Only Mode" 
          onmodechanged="CustomerDetailView_ModeChanged" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
            
          <headerstyle forecolor="Blue"/>
                    
        </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>

Hinweise

Das ModeChanged Ereignis wird ausgelöst, wenn ein DetailsView Steuerelement versucht, zwischen dem Bearbeitungs-, Einfüge- und schreibgeschützten Modus zu wechseln, aber nachdem die CurrentMode Eigenschaft aktualisiert wurde. Dadurch können Sie einen Ereignishandler bereitstellen, der eine benutzerdefinierte Routine ausführt, z. B. das Synchronisieren des DetailsView Steuerelements mit einem anderen Steuerelement, wenn dieses Ereignis auftritt.

Weitere Informationen zum Behandeln von Ereignissen finden Sie unter behandeln und Auslösen von Ereignissen.

Gilt für:

Weitere Informationen