使WinForms文本框的行为类似于浏览器的地址栏。

首先,谢谢你的回答!9个答案。谢谢您。

坏消息:所有的答案都有一些怪癖或者不太正确(或者根本不正确)。我已经为你的每一篇文章添加了评论。

好消息:我找到了一种方法让它发挥作用。这个解决方案非常简单,似乎适用于所有场景(鼠标向下移动、选择文本、切换焦点等)。

bool alreadyFocused;

...

textBox1.GotFocus += textBox1_GotFocus;
textBox1.MouseUp += textBox1_MouseUp;
textBox1.Leave += textBox1_Leave;

...

void textBox1_Leave(object sender, EventArgs e)
{
    alreadyFocused = false;
}


void textBox1_GotFocus(object sender, EventArgs e)
{
    // Select all text only if the mouse isn't down.
    // This makes tabbing to the textbox give focus.
    if (MouseButtons == MouseButtons.None)
    {
        this.textBox1.SelectAll();
        alreadyFocused = true;
    }
}

void textBox1_MouseUp(object sender, MouseEventArgs e)
{
    // Web browsers like Google Chrome select the text on mouse up.
    // They only do it if the textbox isn't already focused,
    // and if the user hasn't selected all text.
    if (!alreadyFocused && this.textBox1.SelectionLength == 0)
    {
        alreadyFocused = true;
        this.textBox1.SelectAll();
    }
}

据我所知,这会导致文本框的行为与Web浏览器的地址栏完全相同。

希望这能帮助下一个试图解决这个看似简单的问题的人。

再次感谢,伙计们,你们所有的答案都帮助我走上了正确的道路。

我找到了一个更简单的解决办法。它涉及异步启动selectall,使用 Control.BeginInvoke 以便在发生Enter和Click事件后发生:

C中:

private void MyTextBox_Enter(object sender, EventArgs e)
{
    // Kick off SelectAll asyncronously so that it occurs after Click
    BeginInvoke((Action)delegate
    {
        MyTextBox.SelectAll();
    });
}

在vb.net中(感谢 Krishanu Dey )

Private Sub MyTextBox_Enter(sender As Object, e As EventArgs) Handles MyTextBox.Enter 
    BeginInvoke(DirectCast(Sub() MyTextBox.SelectAll(), Action)) 
End Sub

您的解决方案是好的,但在一个特定的案例中失败了。如果通过选择文本范围而不是单击来为文本框提供焦点,则alreadyFocused标志不会设置为true,因此当您第二次单击文本框时,所有文本都会被选中。

这是我的解决方案版本。我还将代码放入了一个继承文本框的类中,这样逻辑就可以很好地隐藏起来。

public class MyTextBox : System.Windows.Forms.TextBox
{
    private bool _focused;

    protected override void OnEnter(EventArgs e)
    {
        base.OnEnter(e);
        if (MouseButtons == MouseButtons.None)
        {
            SelectAll();
            _focused = true;
        }
    }

    protected override void OnLeave(EventArgs e)
    {
        base.OnLeave(e);
        _focused = false;
    }

    protected override void OnMouseUp(MouseEventArgs mevent)
    {
        base.OnMouseUp(mevent);
        if (!_focused)
        {
            if (SelectionLength == 0)
                SelectAll();
            _focused = true;
        }
    }
}

有点笨拙,但在你的点击事件中,使用 SendKeys.Send( "{HOME}+{END}" ); .

单击文本框事件?或者即使是鼠标被重新更改的事件也对我有效。好的。不起作用。

所以你必须做两件事:

private bool f = false;

private void textBox_MouseClick(object sender, MouseEventArgs e)
{ 
  if (this.f) { this.textBox.SelectAll(); }
  this.f = false;
}

private void textBox_Enter(object sender, EventArgs e)
{
  this.f = true;
  this.textBox.SelectAll();
}
private void textBox_MouseMove(object sender, MouseEventArgs e) // idea from the other answer
{
  this.f = false; 
}

用于制表(通过文本框到文本框)以及在Enter中调用selectall(),以防万一…

我用一句话回答你…你可能在踢自己…

在Enter事件中:

txtfilter.beginInvoke(新的MethodInvoker(txtfilter.selectAll));

'Inside the Enter event
TextBox1.SelectAll();

好的,在尝试之后,这里是您想要的:

• 在Enter事件上,启动一个标志,说明您已经进入Enter事件。
• 在Click事件上,如果设置了标志,则调用.SelectAll()并重置标志。
• 在mousemove事件中,将entered标志设置为false,这样您就可以单击highlight而不必先输入文本框。

这选择了条目上的所有文本,但允许我随后突出显示部分文本,或允许您在第一次单击时突出显示。

按要求:

    bool entered = false;
    private void textBox1_Enter(object sender, EventArgs e)
    {
        entered = true;
        textBox1.SelectAll();   //From Jakub's answer.
    }

    private void textBox1_Click(object sender, EventArgs e)
    {
        if (entered) textBox1.SelectAll();
        entered = false;
    }

    private void textBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (entered) entered = false;
    }

对于我来说,控件中的制表符选择所有文本。

下面是一个帮助函数,它将解决方案提升到下一个层次——无需继承即可重用。

    public static void WireSelectAllOnFocus( TextBox aTextBox )
    {
        bool lActive = false;
        aTextBox.GotFocus += new EventHandler( ( sender, e ) =>
        {
            if ( System.Windows.Forms.Control.MouseButtons == MouseButtons.None )
            {
                aTextBox.SelectAll();
                lActive = true;
            }
        } );

        aTextBox.Leave += new EventHandler( (sender, e ) => {
            lActive = false;
        } );

        aTextBox.MouseUp += new MouseEventHandler( (sender, e ) => {
            if ( !lActive )
            {
                lActive = true;
                if ( aTextBox.SelectionLength == 0 ) aTextBox.SelectAll();
            }   
        });
    }

要使用它,只需调用传递文本框的函数,它就可以为您处理所有混乱的位。我建议在窗体“加载事件”中连接所有文本框。您可以将此函数放在表单中,或者如果您喜欢我,可以将其放在实用程序类中的某个位置,以便进一步重用。

这适用于wpf/xaml文本框。

    private bool initialEntry = true;
    private void TextBox_SelectionChanged(object sender, RoutedEventArgs e)
    {
        if (initialEntry)
        {
            e.Handled = true;
            initialEntry = false;
            TextBox.SelectAll();
        }
    }
    private void TextBox_GotFocus(object sender, RoutedEventArgs e)
    {
        TextBox.SelectAll();
        initialEntry = true;      
    }

这和 nzhenry 很流行的答案,但我发现不必进行子类划分更容易:

Private LastFocused As Control = Nothing

Private Sub TextBox1_Enter(sender As Object, e As System.EventArgs) Handles TextBox1.Enter, TextBox2.Enter, TextBox3.Enter
    If MouseButtons = Windows.Forms.MouseButtons.None Then LastFocused = sender
End Sub

Private Sub TextBox1_Leave(sender As Object, e As System.EventArgs) Handles TextBox1.Leave, TextBox2.Leave, TextBox3.Leave
    LastFocused = Nothing
End Sub

Private Sub TextBox1_MouseUp(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles TextBox1.MouseUp, TextBox2.MouseUp, TextBox3.MouseUp
    With CType(sender, TextBox)
        If LastFocused IsNot sender AndAlso .SelectionLength = 0 Then .SelectAll()
    End With
    LastFocused = sender
End Sub

selectall从未为我工作过。

这是可行的。

ActiveControl = textBox1;
textBox1->SelectionStart = 0;
textBox1->SelectionLength = textBox1->Text->Length;

我找到了一个更简单的解决方案:

要确保在单击文本框时选中所有文本,请确保单击处理程序调用Enter处理程序。不需要额外的变量!

例子:

private void textBox1_Click(object sender, EventArgs e){
        textBox1_Enter(sender, e);
    }

private void textBox1_Enter(object sender, EventArgs e){
        TextBox tb = ((TextBox)sender);
        tb.SelectAll();
    }

private bool _isSelected = false;
private void textBox_Validated(object sender, EventArgs e)
{
    _isSelected = false;
}

private void textBox_MouseClick(object sender, MouseEventArgs e)
{
    SelectAllText(textBox);
}

private void textBox_Enter(object sender, EventArgs e)
{
    SelectAllText(textBox);
}

private void SelectAllText(TextBox text)
{
    if (!_isSelected)
    {
        _isSelected = true;
        textBox.SelectAll();
    }
}

有趣的是,我认为一个DropDownStyle=Simple的组合框几乎完全符合你想要的行为。

(如果将控件的高度降低到不显示列表,然后再增加几个像素,则组合框和文本框之间没有有效的区别。)

为什么不简单地使用文本框的mousedown事件?它对我来说很好,不需要额外的布尔值。非常干净和简单,例如:

private void textbox_MouseDown(object sender, MouseEventArgs e) {
    if (textbox != null && !string.IsNullOrEmpty(textbox.Text))
    {
        textbox.SelectAll();
    } }

我在mouseup事件中调用了selectall,它对我很好。

    private bool _tailTextBoxFirstClick = false;

    private void textBox1_MouseUp(object sender, MouseEventArgs e)
    {
        if(_textBoxFirstClick)           
            textBox1.SelectAll();

        _textBoxFirstClick = false;
    }  

    private void textBox1_Leave(object sender, EventArgs e)
    {
        _textBoxFirstClick = true;
        textBox1.Select(0, 0);
    }

只需从textbox或maskedtextbox派生类:

public class SMaskedTextBox : MaskedTextBox
{
    protected override void OnGotFocus(EventArgs e)
    {
        base.OnGotFocus(e);
        this.SelectAll();
    }
}

把它用在你的表格上。

你试过了吗? the solution suggested on the MSDN Forum "Windows Forms General" 哪个只是文本框的子类?

实际上,gotfocus是您感兴趣的正确事件(真正的消息),因为无论您如何获得控制权,您最终都会获得控制权。问题是何时调用selectAll()。

试试这个:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        this.textBox1.GotFocus += new EventHandler(textBox1_GotFocus);
    }

    private delegate void SelectAllDelegate();    
    private IAsyncResult _selectAllar = null; //So we can clean up afterwards.

    //Catch the input focus event
    void textBox1_GotFocus(object sender, EventArgs e)
    {
        //We could have gotten here many ways (including mouse click)
        //so there could be other messages queued up already that might change the selection.
        //Don't call SelectAll here, since it might get undone by things such as positioning the cursor.
        //Instead use BeginInvoke on the form to queue up a message
        //to select all the text after everything caused by the current event is processed.
        this._selectAllar = this.BeginInvoke(new SelectAllDelegate(this._SelectAll));
    }

    private void _SelectAll()
    {
        //Clean-up the BeginInvoke
        if (this._selectAllar != null)
        {
            this.EndInvoke(this._selectAllar);
        }
        //Now select everything.
        this.textBox1.SelectAll();
    }
}

对于表单中的一组文本框:

private System.Windows.Forms.TextBox lastFocus;   

private void textBox_GotFocus(object sender, System.Windows.Forms.MouseEventArgs e)   
{
    TextBox senderTextBox = sender as TextBox;
    if (lastFocus!=senderTextBox){
        senderTextBox.SelectAll();
    }
    lastFocus = senderTextBox;   
}

下面的内容似乎有效。 Enter事件处理控件的选项卡,当单击控件时,鼠标悬停将工作。

    private ########### void textBox1_Enter(object sender, EventArgs e)
    {
        textBox1.SelectAll();
    }

    private void textBox1_MouseDown(object sender, MouseEventArgs e)
    {
        if (textBox1.Focused)
            textBox1.SelectAll();
    }

我知道这已经解决了,但我有一个建议,我认为这实际上相当简单。

在鼠标悬停事件中,您所要做的就是

if(textBox.SelectionLength = 0)
{
    textBox.SelectAll();
}

它在vb.net中似乎对我有用(我知道这是一个c问题…不幸的是,我不得不在工作中使用vb。我遇到了这个问题,这就是我来到这里的原因……)

我还没有发现任何问题……除了它没有立即选择点击,但我有问题…

以下解决方案适用于我。我补充说 OnKeyDown 和 OnKeyUp 事件重写以始终选中文本框文本。

    public class NumericTextBox : TextBox
{
    private bool _focused;
    protected override void OnGotFocus(EventArgs e)
    {
        base.OnGotFocus(e);
        if (MouseButtons == MouseButtons.None)
        {
            this.SelectAll();
            _focused = true;
        }
    }
    protected override void OnEnter(EventArgs e)
    {
        base.OnEnter(e);
        if (MouseButtons == MouseButtons.None)
        {
            SelectAll();
            _focused = true;
        }
    }

    protected override void OnLeave(EventArgs e)
    {
        base.OnLeave(e);
        _focused = false;
    }

    protected override void OnMouseUp(MouseEventArgs mevent)
    {
        base.OnMouseUp(mevent);
        if (!_focused)
        {
            if (SelectionLength == 0)
                SelectAll();
            _focused = true;
        }
    }

    protected override void OnKeyUp(KeyEventArgs e)
    {
        base.OnKeyUp(e);

        if (SelectionLength == 0)
            SelectAll();
        _focused = true;
    }
    protected override void OnKeyDown(KeyEventArgs e)
    {
       base.OnKeyDown(e);
       if (SelectionLength == 0)
            SelectAll();
        _focused = true;
    }
}

离开控件时设置selection。你回来的时候它就在那儿。选项卡,当您返回控件时,所有文本都将被选中。

如果使用鼠标进入,则插入符号将正确放置在单击的点上。

private void maskedTextBox1_Leave(object sender, CancelEventArgs e)
    {
        maskedTextBox1.SelectAll();
    }

实际上,答案可能比上述所有问题都要简单得多,例如(在wpf中):

public void YourTextBox_MouseEnter(object sender, MouseEventArgs e)
    {
        YourTextBox.Focus();
        YourTextBox.SelectAll();
    }

当然,我不知道您想如何使用这段代码,但这里要看的主要部分是:首先调用.focus(),然后调用.selectall();

非常简单的解决方案:

    private bool _focusing = false;

    protected override void OnEnter( EventArgs e )
    {
        _focusing = true;
        base.OnEnter( e );
    }

    protected override void OnMouseUp( MouseEventArgs mevent )
    {
        base.OnMouseUp( mevent );

        if( _focusing )
        {
            this.SelectAll();
            _focusing = false;
        }
    }

编辑: 最初的操作特别关注鼠标向下/文本选择/鼠标向上顺序,在这种情况下,上述简单的解决方案将以部分选定的文本结束。

这应该解决*问题(实际上我截取wm_setcursor):

    protected override void WndProc( ref Message m )
    {
        if( m.Msg == 32 ) //WM_SETCURSOR=0x20
        {
              this.SelectAll(); // or your custom logic here                
        }

        base.WndProc( ref m );
    }

*实际上,以下顺序以部分文本选择结束,但如果将鼠标移到文本框上,所有文本都将再次被选择:

鼠标向下/文本选择/鼠标移出文本框/鼠标向上

只需在Enter和Click事件上使用selectAll()。

private void textBox1_Enter(object sender, EventArgs e)
        {

            textBox1.SelectAll();
        }
        private void textBox1_Click(object sender, EventArgs e)
        {
            textBox1.SelectAll();
        }

当鼠标单击而不立即释放时,我发现这是最有效的方法:

    private bool SearchBoxInFocusAlready = false;
    private void SearchBox_LostFocus(object sender, RoutedEventArgs e)
    {
        SearchBoxInFocusAlready = false;
    }

    private void SearchBox_PreviewMouseUp(object sender, MouseButtonEventArgs e)
    {
        if (e.ButtonState == MouseButtonState.Released && e.ChangedButton == MouseButton.Left &&
            SearchBox.SelectionLength == 0 && SearchBoxInFocusAlready == false)
        {
            SearchBox.SelectAll();
        }

        SearchBoxInFocusAlready = true;
    }

我的解决方案很原始,但对我来说效果很好

private async void TextBox_GotFocus(object sender, RoutedEventArgs e)
{
    if (sender is TextBox)
    {
        await Task.Delay(100);
        (sender as TextBox).SelectAll();
    }
}

这在.NET 2005中对我有效-

    ' * if the mouse button is down, do not run the select all.
    If MouseButtons = Windows.Forms.MouseButtons.Left Then
        Exit Sub
    End If

 ' * OTHERWISE INVOKE THE SELECT ALL AS DISCUSSED.