.net 使 WinForms TextBox 的行为类似于浏览器的地址栏

首先，谢谢你的回答！共9个答案.非常感谢.

坏消息:所有答案都有一些怪癖，或者不太正确(或者根本不正确).我给你的每一篇帖子都加了一条 comments .

好消息:我找到了一种方法让它工作.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、 Select 文本、标记焦点等)

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.

再次感谢你们的回答，帮助我走上正确的道路.