Question

在我的C＃窗体上，我有3个文本框，分别命名为textBuyPrice，textSell和textMargin。用户可以输入买入价，如果他们输入卖出价，那么代码将为他们计算保证金。如果用户输入保证金，则代码将输入卖出价。请参阅构成保证金计算的这2位代码。

此代码捕获文本框中光标的输入，并将当前值设置为变量。

private void textMargin_Enter(object sender, EventArgs e)
        {
        OriginalMarginValue = this.textMargin.Text;
        }

此代码捕获文本框中的leave事件并进行任何更改，运行一些计算并更新任何相关字段。

private void textMargin_Leave(object sender, EventArgs e)
        {
        if (this.textMargin.Text != OriginalMarginValue)
            {
            Parts part = new Parts();
            decimal dcmBuy = part.RemoveDollarSign(this.textBuyPrice.Text);
            decimal dcmMargin = part.RemovePercentSign(this.textMargin.Text);
            decimal dcmSell = part.GetSellPrice(dcmBuy, dcmMargin / 100);
            string strSell = dcmSell.ToString("C");
            this.textSellPrice.Text = strSell; 
            }

        }

正在发生的事情似乎是Enter和Leave事件之间的循环。当我尝试并跳出文本框时，Leave事件触发后。 Enter事件再次触发，它不会让我标签。

发生了什么事？我应该强制标签将焦点设置在另一个字段上吗？

上面的代码与textSellPrice代码相同，我在该文本框中没有相同的问题。

THX

修改的这是调用堆栈，因为代码在尝试离开文本框后第二次进入Enter事件：

AutoShop.exe！AutoShop.formPartDetail.textMargin_Enter（object sender = {Text =“57.14％”}，System.EventArgs e = {System.EventArgs}）第168行C＃       System.Windows.Forms.dll！System.Windows.Forms.Control.OnEnter（System.EventArgs e）+ 0x88 bytes
      System.Windows.Forms.dll！System.Windows.Forms.Control.NotifyEnter（）+ 0x1f bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.UpdateFocusedControl（）+ 0x195 bytes       System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.AssignActiveControlInternal（System.Windows.Forms.Control value = {Text =“57.14％”}）+ 0x60 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.ActivateControlInternal（System.Windows.Forms.Control control，bool originator = false）+ 0x48 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.SetActiveControlInternal（System.Windows.Forms.Control value = {Text =“57.14％”}）+ 0x73 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.ValidateThroughAncestor（System.Windows.Forms.Control ancestorControl，bool preventFocusChangeOnError）+ 0x212 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.EnterValidation（System.Windows.Forms.Control enterControl）+ 0x7c bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.UpdateFocusedControl（）+ 0x8a bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.AssignActiveControlInternal（System.Windows.Forms.Control value = {Text =“”}）+ 0x60 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.ActivateControlInternal（System.Windows.Forms.Control control，bool originator = false）+ 0x48 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.SetActiveControlInternal（System.Windows.Forms.Control value = {Text =“”}）+ 0x73 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.SetActiveControl（System.Windows.Forms.Control ctl）+ 0x33 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.ActiveControl.set（System.Windows.Forms.Control value）+ 0x5 bytes
      System.Windows.Forms.dll！System.Windows.Forms.Control.Select（bool directed，bool forward）+ 0x1b bytes
      System.Windows.Forms.dll！System.Windows.Forms.Control.SelectNextControl（System.Windows.Forms.Control ctl，bool forward，bool tabStopOnly，bool nested，bool wrap）+ 0x7e bytes
      System.Windows.Forms.dll！System.Windows.Forms.Form.ProcessTabKey（bool forward = true）+ 0x24 bytes
      System.Windows.Forms.dll！System.Windows.Forms.ContainerControl.ProcessDialogKey（System.Windows.Forms.Keys keyData = LButton | Back）+ 0x71 bytes

Answer 1

尝试对文本框使用验证事件。您也可以选择取消验证。

e.g。

   private void textBox2_Validating(object sender, CancelEventArgs e)
        {
            if (DoSomething(textBox2))
            {
                textBox3.Text = textBox2.Text;
            }
            else
            {
                e.Cancel = true; //cancel the validation.
            }

        }

文本框进入和离开事件重复

1 个答案: