按 Enter 移动到下一个控件

Question

I have a few TextBox on the WinForm. I would like the focus to move to the next control when Enter key is pressed? Whenever a textbox gains control, it will also select the text, so that any editing will replace the current one.

What is the best way to do this?

Answer 1

Tab as Enter: create a user control which inherits textbox, override the KeyPress method. If the user presses enter you can either call SendKeys.Send("{TAB}") or System.Windows.Forms.Control.SelectNextControl() . Note you can achieve the same using the KeyPress event.

Focus Entire text: Again, via override or events, target the GotFocus event and then call TextBox.Select method.

Answer 2

A couple of code examples in C# using SelectNextControl .

The first moves to the next control when ENTER is pressed.

    private void Control_KeyUp( object sender, KeyEventArgs e )
    {
        if( (e.KeyCode == Keys.Enter) || (e.KeyCode == Keys.Return) )
        {
            this.SelectNextControl( (Control)sender, true, true, true, true );
        }
    }

The second uses the UP and DOWN arrows to move through the controls.

    private void Control_KeyUp( object sender, KeyEventArgs e )
    {
        if( e.KeyCode == Keys.Up )
        {
            this.SelectNextControl( (Control)sender, false, true, true, true );
        }
        else if( e.KeyCode == Keys.Down )
        {
            this.SelectNextControl( (Control)sender, true, true, true, true );
        }
    }

See MSDN SelectNextControl Method

Answer 3

In a KeyPress event, if the user pressed Enter, call

SendKeys.Send("{TAB}")

Nicest way to implement automatically selecting the text on receiving focus is to create a subclass of TextBox in your project with the following override:

Protected Overrides Sub OnGotFocus(ByVal e As System.EventArgs)
    SelectionStart = 0
    SelectionLength = Text.Length
    MyBase.OnGotFocus(e)
End Sub

Then use this custom TextBox in place of the WinForms standard TextBox on all your Forms.

Answer 4

You can put a KeyPress handler on your TextBoxes, and see which key was used.

To handle the text selection, put a handler on the GotFocus event.

You may also want to consider how to (or if you need to) handle multi-line TextBoxes.

Answer 5

This may help:

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    //
    // Detect the KeyEventArg's key enumerated constant.
    //
    if (e.KeyCode == Keys.Enter)
    {
        MessageBox.Show("You pressed enter! Good job!");
    }
}

Answer 6

private void txt_invoice_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
            txt_date.Focus();
    }

    private void txt_date_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
            txt_patientname.Focus();
    }

}

Answer 7

You could also write your own Control for this, in case you want to use this more often. Assuming you have multiple TextBoxes in a Grid, it would look something like this:

public class AdvanceOnEnterTextBox : UserControl
{

    TextBox _TextBox;
    public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(String), typeof(AdvanceOnEnterTextBox), null);
    public static readonly DependencyProperty InputScopeProperty = DependencyProperty.Register("InputScope", typeof(InputScope), typeof(AdvanceOnEnterTextBox), null);


    public AdvanceOnEnterTextBox()
    {
        _TextBox = new TextBox();
        _TextBox.KeyDown += customKeyDown;
        Content = _TextBox;

    }


    /// <summary>
    /// Text for the TextBox
    /// </summary>
    public String Text
    {
        get { return _TextBox.Text; }
        set { _TextBox.Text = value; }
    }


    /// <summary>
    /// Inputscope for the Custom Textbox
    /// </summary>
    public InputScope InputScope
    {
        get { return _TextBox.InputScope; }
        set { _TextBox.InputScope = value; }
    }


    void customKeyDown(object sender, KeyEventArgs e)
    {
        if (!e.Key.Equals(Key.Enter)) return;

        var element = ((TextBox)sender).Parent as AdvanceOnEnterTextBox;
        if (element != null)
        {
            int currentElementPosition = ((Grid)element.Parent).Children.IndexOf(element);
            try
            {
                // Jump to the next AdvanceOnEnterTextBox (assuming, that Labels are inbetween).
                ((AdvanceOnEnterTextBox)((Grid)element.Parent).Children.ElementAt(currentElementPosition + 2)).Focus();
            }
            catch (Exception)
            {
                // Close Keypad if this was the last AdvanceOnEnterTextBox
                ((AdvanceOnEnterTextBox)((Grid)element.Parent).Children.ElementAt(currentElementPosition)).IsEnabled = false;
                ((AdvanceOnEnterTextBox)((Grid)element.Parent).Children.ElementAt(currentElementPosition)).IsEnabled = true;
            }
        }
    }
}

Answer 8

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        if (keyData == (Keys.Enter))
        {
            SendKeys.Send("{TAB}");
        }

        return base.ProcessCmdKey(ref msg, keyData);
    }

goto the design form and View-> tab(as like picture shows) Order then you ordered all the control[That's it]

Answer 9

尝试使用：

SendKeys.Send("{TAB}")