Control.DoubleClick Control.DoubleClick Control.DoubleClick Control.DoubleClick Event

public:
 event EventHandler ^ DoubleClick;

public event EventHandler DoubleClick;

member this.DoubleClick : EventHandler 

Public Custom Event DoubleClick As EventHandler 

Ejemplos

El siguiente ejemplo de código utiliza el DoubleClick eventos de un ListBox para cargar los archivos de texto que aparece en el ListBox en un TextBox control.The following code example uses the DoubleClick event of a ListBox to load text files listed in the ListBox into a TextBox control.

   // This example uses the DoubleClick event of a ListBox to load text files
   // listed in the ListBox into a TextBox control. This example
   // assumes that the ListBox, named listBox1, contains a list of valid file
   // names with path and that this event handler method
   // is connected to the DoublClick event of a ListBox control named listBox1.
   // This example requires code access permission to access files.
private:
   void listBox1_DoubleClick( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      // Get the name of the file to open from the ListBox.
      String^ file = listBox1->SelectedItem->ToString();
      try
      {
         // Determine if the file exists before loading.
         if ( System::IO::File::Exists( file ) )
         {
            
            // Open the file and use a TextReader to read the contents into the TextBox.
            System::IO::FileInfo^ myFile = gcnew System::IO::FileInfo( listBox1->SelectedItem->ToString() );
            System::IO::TextReader^ myData = myFile->OpenText();
            ;
            textBox1->Text = myData->ReadToEnd();
            myData->Close();
         }
      }
      // Exception is thrown by the OpenText method of the FileInfo class.
      catch ( System::IO::FileNotFoundException^ ) 
      {
         MessageBox::Show( "The file you specified does not exist." );
      }
      // Exception is thrown by the ReadToEnd method of the TextReader class.
      catch ( System::IO::IOException^ ) 
      {
         MessageBox::Show( "There was a problem loading the file into the TextBox. Ensure that the file is a valid text file." );
      }
   }

// This example uses the DoubleClick event of a ListBox to load text files
// listed in the ListBox into a TextBox control. This example
// assumes that the ListBox, named listBox1, contains a list of valid file
// names with path and that this event handler method
// is connected to the DoublClick event of a ListBox control named listBox1.
// This example requires code access permission to access files.
private void listBox1_DoubleClick(object sender, System.EventArgs e)
{
    // Get the name of the file to open from the ListBox.
    String file = listBox1.SelectedItem.ToString();

    try
    {
        // Determine if the file exists before loading.
        if (System.IO.File.Exists(file))
        {
            // Open the file and use a TextReader to read the contents into the TextBox.
            System.IO.FileInfo myFile = new System.IO.FileInfo(listBox1.SelectedItem.ToString());
            System.IO.TextReader myData = myFile.OpenText();;

            textBox1.Text = myData.ReadToEnd();
            myData.Close();
        }
    }
        // Exception is thrown by the OpenText method of the FileInfo class.
    catch(System.IO.FileNotFoundException)
    {
        MessageBox.Show("The file you specified does not exist.");
    }
        // Exception is thrown by the ReadToEnd method of the TextReader class.
    catch(System.IO.IOException)
    {
        MessageBox.Show("There was a problem loading the file into the TextBox. Ensure that the file is a valid text file.");
    }
}

' This example uses the DoubleClick event of a ListBox to load text files  
' listed in the ListBox into a TextBox control. This example
' assumes that the ListBox, named listBox1, contains a list of valid file 
' names with path and that this event handler method
' is connected to the DoublClick event of a ListBox control named listBox1.
' This example requires code access permission to access files.
Private Sub listBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles listBox1.DoubleClick
    ' Get the name of the file to open from the ListBox.
    Dim file As [String] = listBox1.SelectedItem.ToString()

    Try
        ' Determine if the file exists before loading.
        If System.IO.File.Exists(file) Then
            ' Open the file and use a TextReader to read the contents into the TextBox.
            Dim myFile As New System.IO.FileInfo(listBox1.SelectedItem.ToString())
            Dim myData As System.IO.TextReader = myFile.OpenText()

            textBox1.Text = myData.ReadToEnd()
            myData.Close()
        End If
        ' Exception is thrown by the OpenText method of the FileInfo class.
    Catch
        MessageBox.Show("The file you specified does not exist.")
        ' Exception is thrown by the ReadToEnd method of the TextReader class.
    Catch
     MessageBox.Show("There was a problem loading the file into the TextBox. Ensure that the file is a valid text file.")
    End Try
End Sub

Comentarios

Un doble clic viene determinada por la configuración del mouse del sistema operativo del usuario.A double-click is determined by the mouse settings of the user's operating system. El usuario puede establecer el tiempo entre los clics de un botón del mouse que debe considerarse como un doble clic y no como dos clics.The user can set the time between clicks of a mouse button that should be considered a double-click rather than two clicks. El Click evento se desencadena cada vez que se hace doble clic en un control.The Click event is raised every time a control is double-clicked. Por ejemplo, si tiene controladores de eventos para el Click y DoubleClick eventos de un Form, Click y DoubleClick se generan eventos cuando se hace doble clic en el formulario y se llama a ambos métodos.For example, if you have event handlers for the Click and DoubleClick events of a Form, the Click and DoubleClick events are raised when the form is double-clicked and both methods are called. Si se hace doble clic en un control y que el control no admite la DoubleClick eventos, el Click evento podría generarse dos veces.If a control is double-clicked and that control does not support the DoubleClick event, the Click event might be raised twice.

Debe establecer el StandardDoubleClick y StandardClick valores de ControlStyles a true para que se genere este evento.You must set the StandardDoubleClick and StandardClick values of ControlStyles to true for this event to be raised. Ya se pueden establecer estos valores en true si se hereda de existente controles Windows Forms.These values might already be set to true if you are inheriting from existing Windows Forms controls.

Para obtener más información sobre el manejo de eventos, consulte controlar y provocar eventos.For more information about handling events, see Handling and Raising Events.

Notas a los desarrolladores de herederos

Heredar de un control de Windows Forms estándar y cambiar el StandardClick o StandardDoubleClick valores de ControlStyles a true puede provocar un comportamiento inesperado o no tienen ningún efecto en absoluto si el control no admite el Click o DoubleClickeventos.Inheriting from a standard Windows Forms control and changing the StandardClick or StandardDoubleClick values of ControlStyles to true can cause unexpected behavior or have no effect at all if the control does not support the Click or DoubleClick events.

En la tabla siguiente se enumera los controles de formularios Windows Forms y qué evento (Click o DoubleClick) se produce en respuesta a la acción del mouse especificada.The following table lists Windows Forms controls and which event (Click or DoubleClick) is raised in response to the mouse action specified.

ControlControl	Clic del Mouse izquierdoLeft Mouse Click	Haga doble clic en el primario del MouseLeft Mouse Double Click	Haga clic derecho del MouseRight Mouse Click	Haga doble clic en el secundario del MouseRight Mouse Double Click	Haga clic central del MouseMiddle Mouse Click	Haga doble clic en la central del MouseMiddle Mouse Double Click	Haga clic en de XButton1 del MouseXButton1 Mouse Click	XButton1 del Mouse haga doble clic enXButton1 Mouse Double-Click	Haga clic en de XButton2 del MouseXButton2 Mouse Click	XButton2 del Mouse haga doble clic enXButton2 Mouse Double-Click
MonthCalendar,MonthCalendar, DateTimePicker,DateTimePicker, RichTextBox,RichTextBox, HScrollBar,HScrollBar, VScrollBar	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone
Button,Button, CheckBox,CheckBox, RadioButton	ClicClick	Haga clic en, haga clic enClick, Click	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone
ListBox,ListBox, CheckedListBox,CheckedListBox, ComboBox	ClicClick	Click, DoubleClickClick, DoubleClick	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone
TextBox,TextBox, DomainUpDown,DomainUpDown, NumericUpDown	ClicClick	Click, DoubleClickClick, DoubleClick	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone
\* TreeView,\* TreeView, \* ListView\* ListView	ClicClick	Click, DoubleClickClick, DoubleClick	ClicClick	Click, DoubleClickClick, DoubleClick	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone	ningunanone
ProgressBar,ProgressBar, TrackBar	ClicClick	Haga clic en, haga clic enClick, Click	ClicClick	Haga clic en, haga clic enClick, Click	ClicClick	Haga clic en, haga clic enClick, Click	ClicClick	Haga clic en, haga clic enClick, Click	ClicClick	Haga clic en, haga clic enClick, Click
Form,Form, DataGrid,DataGrid, Label,Label, LinkLabel,LinkLabel, Panel,Panel, GroupBox,GroupBox, PictureBox,PictureBox, Splitter,Splitter, StatusBar,StatusBar, ToolBar,ToolBar, TabPage,TabPage, ** TabControl	ClicClick	Click, DoubleClickClick, DoubleClick	ClicClick	Click, DoubleClickClick, DoubleClick	ClicClick	Click, DoubleClickClick, DoubleClick	ClicClick	Click, DoubleClickClick, DoubleClick	ClicClick	Click, DoubleClickClick, DoubleClick

* Debe ser el puntero del mouse sobre un objeto secundario (TreeNode o ListViewItem).* The mouse pointer must be over a child object (TreeNode or ListViewItem).

** Los TabControl debe tener al menos un TabPage en su TabPages colección.** The TabControl must have at least one TabPage in its TabPages collection.

Se aplica a

Consulte también:

• OnDoubleClick(EventArgs) OnDoubleClick(EventArgs) OnDoubleClick(EventArgs) OnDoubleClick(EventArgs)
• StandardClick
• StandardDoubleClick
• Click Click Click Click
• MouseClick MouseClick MouseClick MouseClick
• MouseDoubleClick MouseDoubleClick MouseDoubleClick MouseDoubleClick