如何确定哪个文本框是关注的并向其添加文本...........？

Question

我在C#中做一个复杂的计算器.第一个文本框接受真实部分,第二个文本框接受虚构部分.我也希望能够使用鼠标输入值.因此,如果我单击button1,它将"1"连接到焦点所在的文本框中的值.我无法确定哪个文本框是关注的.我尝试了一些人发布的东西,比如使用GotFocus作为例子,并且没有用过..

    private Control focusedControl;

    private void TextBox_GotFocus(object sender, EventArgs e)
    {
        focusedControl = (Control)sender;
    }


    private void button1_Click(object sender, EventArgs e)
    {
        if (focusedControl != null)
        {
            focusedControl.Focus();
            SendKeys.Send("1"); 

        }

    }

Answer 1

private TextBox focusedControl;

private void TextBox_GotFocus(object sender, EventArgs e)
{
    focusedControl = (TextBox)sender;
}


private void button1_Click(object sender, EventArgs e)
{
    if (focusedControl != null)
    {   

        focusedControl.Text  += "1";
    }

}

您只需使用TextBox_GotFocus作为两个文本框的EventHandler.

Answer 2

        if ((txtBox as Control).Focused)
        {

        }