Question

我有一个问题。按Enter后我打开新表单（form2），我可以在其中添加内容到db。在Form2上按钮确定。如果我通过按Enter键激活此按钮，则关闭form2。

问题是，通过这个动作，我再次在form1上调用KeyUp，并且我在循环中...

这里是例子：

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

由于您已在表单中标记KeyPreview，因此它将捕获所有关键事件。你可以设置一个标志＆amp;像这样管理。

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＃ - 仅在一个表单上的KeyUp

1 个答案: