c# - 仅在一种形式上使用 KeyUp

Question

我有一个问题。按 Enter 键后，我打开新表单 (form2)，我可以在其中向数据库添加一些内容。在 Form2 上是按钮 Ok。如果我通过按 Enter 激活此按钮，我将关闭 form2。

问题是，通过这个动作，我又一次在 form1 上调用 KeyUp，我在循环中..

示例如下：

private void Form1_Load(object sender, EventArgs e)
        {
            this.KeyPreview = true;
            this.KeyUp += new System.Windows.Forms.KeyEventHandler(KeyEvent);
        }        
private void KeyEvent(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                dataGridViewSkladovePolozky.Focus();
                pridatDoKosiku();
            }
        }
private void buttonPridatDoKosiku_Click(object sender, EventArgs e)
        {
            pridatDoKosiku();
        }
private void pridatDoKosiku()
        {
            PridatDoKosiku pridatDoKosiku = new PridatDoKosiku(); 
            pridatDoKosiku.ShowDialog();
            refreshNakupniKosik(true);
            pridatDoKosiku.Dispose();
        }

Answer 1

由于您已经在表单中标记了 KeyPreview，它将捕获所有关键事件。您可以像这样设置标志和管理。

bool InFocus = false;
    private void Form1_Load(object sender, EventArgs e)
            {
                this.KeyPreview = true;
                this.KeyUp += new System.Windows.Forms.KeyEventHandler(KeyEvent);
            }        
    private void KeyEvent(object sender, KeyEventArgs e)
            {
           if(InFocus ) return;
                if (e.KeyCode == Keys.Enter)
                {
                    dataGridViewSkladovePolozky.Focus();
                    pridatDoKosiku();
                }
            }
    private void buttonPridatDoKosiku_Click(object sender, EventArgs e)
            {
                pridatDoKosiku();
            }
    private void pridatDoKosiku()
            {
                PridatDoKosiku pridatDoKosiku = new PridatDoKosiku(); 
InFocus = true;
                pridatDoKosiku.ShowDialog();
                refreshNakupniKosik(true);
                pridatDoKosiku.Dispose();
InFocus = false;
            }

c# - 仅在一种形式上使用 KeyUp

c# - KeyUp only on one form

c#

keypress

keyup