listBox点击(click)后回到的上一个物件的焦点(focus)，并隐藏listbox

listBox点击(click)后回到的上一个物件的焦点(focus)，并隐藏listbox

方法一：

Control _lastEnteredControl;

public Form1()

{

    InitializeComponent();

    foreach (Control ctrl in Controls)

    //foreach (Control ctrl in panel1.Controls)//如果是在panel1下的textBox,则使用此句

    {

        if (ctrl is TextBox)

        {

            ctrl.Enter += delegate(object sender, EventArgs e)

                {

                    _lastEnteredControl = (Control) sender;//获得焦点

                    listBox1.Visible = false;//隐藏

                };

            ctrl.Click += delegate(object sender, EventArgs e)

                {

                    _lastEnteredControl = (Control) sender;//获得焦点

                    listBox1.Visible = false;//隐藏

                };

        }

    }

}

private void listBox1_Click(object sender, EventArgs e)//写其它代码，见下面内容

{

    _lastEnteredControl.Focus();

}

方法二：

Control _lastEnteredControl;

private void textBox1_Enter(object sender, EventArgs e) //注意是Enter

{

    _lastEnteredControl = (Control)sender;//获得焦点

    listBox1.Visible = false;//隐藏

}

private void textBox2_Click(object sender, EventArgs e)

{

    _lastEnteredControl.Focus();//获得焦点

    listBox1.Visible = false;//隐藏

}

private void listBox1_Click(object sender, EventArgs e)//写其它代码，见下面内容

{

    _lastEnteredControl.Focus();//获得焦点

}

也可以接下来进行相关的判断，写其它代码

private void listBox1_Click(object sender, EventArgs e)

{

    _lastEnteredControl.Focus();

    if (_lastEnteredControl == textBox1)

    {

        MclickList twoclicklist = new TwoMclk(listBox1, textBox2, label4);

        listBox1.Visible = false;

    }

    if (_lastEnteredControl == textBox2)

    {

        MclickList threeclicklist = new ThreeMclk(listBox1, textBox6, label13, label15);

        listBox1.Visible = false;

    }

    

}