DataGrid.AllowNavigationChanged-Ereignis

Tritt ein, wenn die AllowNavigation-Eigenschaft geändert wurde.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Syntax

'Declaration
Public Event AllowNavigationChanged As EventHandler
'Usage
Dim instance As DataGrid
Dim handler As EventHandler

AddHandler instance.AllowNavigationChanged, handler

public event EventHandler AllowNavigationChanged

public:
event EventHandler^ AllowNavigationChanged {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}

/** @event */
public void add_AllowNavigationChanged (EventHandler value)

/** @event */
public void remove_AllowNavigationChanged (EventHandler value)

JScript unterstützt die Verwendung von Ereignissen, aber nicht die Deklaration von neuen Ereignissen.

Hinweise

Wenn die AllowNavigation-Eigenschaft auf false festgelegt ist, werden keine Hyperlinks zu untergeordneten Tabellen angezeigt.

Weitere Informationen zum Behandeln von Ereignissen finden Sie unter Behandeln von Ereignissen.

Beispiel

Im folgenden Codebeispiel wird die AllowNavigation-Eigenschaft zurückgesetzt und das AllowNavigationChanged-Ereignis ausgelöst.

' Create an instance of the 'AllowNavigationChanged' EventHandler.
Private Sub CallAllowNavigationChanged()
   AddHandler myDataGrid.AllowNavigationChanged, AddressOf Grid_AllowNavChange
End Sub 'CallAllowNavigationChanged


' Set the 'AllowNavigation' property on click of a button.
 Private Sub myButton_Click(ByVal sender As Object, ByVal e As EventArgs)
     If myDataGrid.AllowNavigation = True Then
         myDataGrid.AllowNavigation = False
     Else
         myDataGrid.AllowNavigation = True
     End If
 End Sub 'myButton_Click
 
' Raise the event when 'AllowNavigation' property is changed.
 Private Sub Grid_AllowNavChange(ByVal sender As Object, ByVal e As EventArgs)
     Dim myString As String = "AllowNavigationChanged event raised, Navigation "
     Dim myBool As Boolean = myDataGrid.AllowNavigation
     ' Create appropriate alert message.
     myString = myString + IIF(mybool, "is", "is not") + "allowed"
     ' Show information about navigation.
     MessageBox.Show(myString, "Navigation information")
 End Sub 'Grid_AllowNavChange

// Create an instance of the 'AllowNavigationChanged' EventHandler.
private void CallAllowNavigationChanged()
{
   myDataGrid.AllowNavigationChanged += 
                                   new EventHandler(Grid_AllowNavChange);
}

// Set the 'AllowNavigation' property on click of a button.
private void myButton_Click(object sender, EventArgs e)
{
   if (myDataGrid.AllowNavigation == true)
      myDataGrid.AllowNavigation = false;
   else
      myDataGrid.AllowNavigation = true;
}

// Raise the event when 'AllowNavigation' property is changed.
private void Grid_AllowNavChange(object sender, EventArgs e)
{
   string myString = "AllowNavigationChanged event raised, Navigation ";
   bool myBool = myDataGrid.AllowNavigation;
   // Create appropriate alert message.
   myString = myString + (myBool ? " is " : " is not ") + "allowed";
   // Show information about navigation.
   MessageBox.Show(myString, "Navigation information");
}

private:
   // Create an instance of the 'AllowNavigationChanged' EventHandler.
   void CallAllowNavigationChanged()
   {
      myDataGrid->AllowNavigationChanged += gcnew EventHandler( this, &MyDataGrid::Grid_AllowNavChange );
   }

   // Set the 'AllowNavigation' property on click of a button.
private:
   void myButton_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      if ( myDataGrid->AllowNavigation == true )
            myDataGrid->AllowNavigation = false;
      else
            myDataGrid->AllowNavigation = true;
   }

   // Raise the event when 'AllowNavigation' property is changed.
private:
   void Grid_AllowNavChange( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      String^ myString = "AllowNavigationChanged event raised, Navigation ";
      bool myBool = myDataGrid->AllowNavigation;

      // Create appropriate alert message.
      myString = String::Concat( myString, myBool ? (String^)" is " : " is not ", "allowed" );

      // Show information about navigation.
      MessageBox::Show( myString, "Navigation information" );
   }

// Create an instance of the 'AllowNavigationChanged' EventHandler.
private void CallAllowNavigationChanged()
{
    myDataGrid.add_AllowNavigationChanged(new EventHandler(
        GridAllowNavChange));
} //CallAllowNavigationChanged

// Set the 'AllowNavigation' property on click of a button.
protected void myButton_Click(Object sender, EventArgs e)
{
    if (myDataGrid.get_AllowNavigation() == true) {
        myDataGrid.set_AllowNavigation(false);
    }
    else {
        myDataGrid.set_AllowNavigation(true);
    }
} //myButton_Click

// Raise the event when 'AllowNavigation' property is changed.
protected void GridAllowNavChange(Object sender, EventArgs e)
{
    String myString = "AllowNavigationChanged event raised, Navigation ";
    boolean myBool = myDataGrid.get_AllowNavigation();

    // Create appropriate alert message.
    myString = myString + ((myBool) ? " is " : " is not " + "allowed");

    // Show information about navigation.
    MessageBox.Show(myString, "Navigation information");
} //GridAllowNavChange

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

DataGrid-Klasse
DataGrid-Member
System.Windows.Forms-Namespace