CurrencyManager.Position Propiedad

Definición

Obtiene o establece la posición en la que se encuentra dentro de la lista.Gets or sets the position you are at within the list.

public:
 virtual property int Position { int get(); void set(int value); };
public override int Position { get; set; }
member this.Position : int with get, set
Public Overrides Property Position As Integer

Valor de propiedad

Un número entre 0 y Count menos 1.A number between 0 and Count minus 1.

Ejemplos

En los siguientes ejemplos de código se usa la propiedad Position para permitir la navegación a través de una lista.The following code examples use the Position property to allow navigation through a list.

private:
   void MoveNext( CurrencyManager^ myCurrencyManager )
   {
      if ( myCurrencyManager->Count == 0 )
      {
         Console::WriteLine( "No records to move to." );
         return;
      }

      if ( myCurrencyManager->Position == myCurrencyManager->Count - 1 )
      {
         Console::WriteLine( "You're at end of the records" );
      }
      else
      {
         myCurrencyManager->Position += 1;
      }
   }

   void MoveFirst( CurrencyManager^ myCurrencyManager )
   {
      if ( myCurrencyManager->Count == 0 )
      {
         Console::WriteLine( "No records to move to." );
         return;
      }

      myCurrencyManager->Position = 0;
   }

   void MovePrevious( CurrencyManager^ myCurrencyManager )
   {
      if ( myCurrencyManager->Count == 0 )
      {
         Console::WriteLine( "No records to move to." );
         return;
      }

      if ( myCurrencyManager->Position == 0 )
      {
         Console::WriteLine( "You're at the beginning of the records." );
      }
      else
      {
         myCurrencyManager->Position -= 1;
      }
   }

   void MoveLast( CurrencyManager^ myCurrencyManager )
   {
      if ( myCurrencyManager->Count == 0 )
      {
         Console::WriteLine( "No records to move to." );
         return;
      }
      myCurrencyManager->Position = myCurrencyManager->Count - 1;
   }
private void MoveNext(CurrencyManager myCurrencyManager){
    if(myCurrencyManager.Count == 0) {
       Console.WriteLine("No records to move to.");
       return;
    }
    if (myCurrencyManager.Position == myCurrencyManager.Count - 1){
       Console.WriteLine("You're at end of the records");
    }
    else{
      myCurrencyManager.Position += 1;
    }
 }
 
 private void MoveFirst(CurrencyManager myCurrencyManager){
    if(myCurrencyManager.Count == 0) {
       Console.WriteLine("No records to move to.");
       return;
    }
 
    myCurrencyManager.Position = 0;
 }
 
 private void MovePrevious(CurrencyManager myCurrencyManager){
    if(myCurrencyManager.Count == 0) {
       Console.WriteLine("No records to move to.");
       return;
    }
    if(myCurrencyManager.Position == 0) {
       Console.WriteLine("You're at the beginning of the records.");
    }   
    else{
       myCurrencyManager.Position -= 1;
    }
 }
 
 private void MoveLast(CurrencyManager myCurrencyManager){
    if(myCurrencyManager.Count == 0) {
       Console.WriteLine("No records to move to.");
       return;
    }
    myCurrencyManager.Position = myCurrencyManager.Count - 1;
 }
   
Private Sub MoveNext(ByVal myCurrencyManager As CurrencyManager)
    If myCurrencyManager.Count = 0 Then
       Console.WriteLine("No records to move to.")
       Exit Sub
    End If
 
    If myCurrencyManager.Position = myCurrencyManager.Count - 1 Then 
       MessageBox.Show("You're at end of the records")
    Else
       myCurrencyManager.Position += 1
    End If
 End Sub
 
 Private Sub MoveFirst(ByVal myCurrencyManager As CurrencyManager)
    If myCurrencyManager.Count = 0 Then
       Console.WriteLine("No records to move to.")
       Exit Sub
    End If
 
    myCurrencyManager.Position = 0
 End Sub
 
 Private Sub MovePrevious(ByVal myCurrencyManager As CurrencyManager)
    If myCurrencyManager.Count = 0 Then
       Console.WriteLine("No records to move to.")
       Exit Sub
    End If
 
    If myCurrencyManager.Position = 0 Then
       MessageBox.Show("You're at the beginning of the records.")
    Else
       myCurrencyManager.Position -= 1
    End if
 End Sub
 
 Private Sub MoveLast(ByVal myCurrencyManager As CurrencyManager)
    If myCurrencyManager.Count = 0 Then
       Console.WriteLine("No records to move to.")
       Exit Sub
    End If
 
    myCurrencyManager.Position = myCurrencyManager.Count - 1
 End Sub
   

Comentarios

Una propiedad importante de la clase CurrencyManager es la propiedad Position.An important property of the CurrencyManager class is the Position property. En una lista de elementos, solo puede ver un elemento de toda la lista.In a list of items, you can view only one item out of the entire list. Para determinar qué elemento se va a ver, establezca el Position en un número comprendido entre 0 (el principio de la lista) y Count menos 1 (el final de la lista).To determine which item is viewed, set the Position to a number between 0 (the beginning of the list) and Count minus 1 (the end of the list).

Por lo tanto, el Position determina la moneda o el lugar en la lista de todos los controles enlazados al mismo CurrencyManager.Therefore, the Position determines the currency, or place in the list, of all controls bound to the same CurrencyManager. Por ejemplo, imagine una lista que consta de dos columnas denominadas "FirstName" y "LastName".For example, imagine a list consisting of two columns called "FirstName" and "LastName". Dos controles TextBox están enlazados a la misma lista; el primer control se enlaza a la primera columna y el segundo control se enlaza a la segunda columna.Two TextBox controls are bound to the same list; the first control is bound to the first column, and the second control is bound to the second column. Cuando el Position del CurrencyManager común se establece en la tercera posición, ambos controles muestran los valores adecuados para esa posición en la lista.When the Position of the common CurrencyManager is set to the third position, both controls display the appropriate values for that position in the list. En otras palabras, si el elemento de la posición tres está formado por el nombre "Juan" y el apellido "Smith", los controles enlazados mostrarán "John" y "Smith".In other words, if the item at position three consists of the first name "John" and the last name "Smith", the bound controls will display "John" and "Smith".

Se aplica a

Consulte también: