Eventhandler覆盖？

Question

我试图找到一种方法来轻松检测是否对winform上的控件进行了更改.此方法有效,但它不提供有关已更改控件的信息.有没有办法覆盖TextChanged事件,因此它将传递和EventArg,其中包含触发事件的控件的名称？当AccountChangedHandler执行发件人参数时,包含有关文本框的信息,例如'.Text'属性的当前值,但我没有看到有关哪个控件引发事件的任何信息.

private bool _dataChanged = false;

internal TestUserControl()
{
  InitializeComponent();

  txtBillAddress1.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtBillAddress2.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtBillZip.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtBillState.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtBillCity.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtCountry.TextChanged += new System.EventHandler(AccountChangedHandler);

  txtContactName.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtContactValue1.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtContactValue2.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtContactValue3.TextChanged += new System.EventHandler(AccountChangedHandler);
  txtContactValue4.TextChanged += new System.EventHandler(AccountChangedHandler);

}

private void AccountChangedHandler(object sender, EventArgs e)
{
  _dataChanged = true;
}

Answer 1

void AccountChangedHandler(object sender, EventArgs e)
{
   string n = ((TextBox)sender).Name;
   string t = ((TextBox)sender).Text;
   // or instead of cast
   TextBox tb = sender as TextBox; // if sender is another type, tb is null
   if(tb != null)
   {
     string n = tb.Name;
     string t = tb.Text;
   }
}

你也可以尝试使用

foreach (Control c in this.Controls)
{
 c.TextChanged += new EventHandler(AccountChangedHandler);
}