日期:2014-05-18 浏览次数:21103 次
private void textBox1_Validating(object sender, System.ComponentModel.CancelEventArgs e) { string errorMsg; if(!ValidEmailAddress(textBox1.Text, out errorMsg)) { // Cancel the event and select the text to be corrected by the user. e.Cancel = true; textBox1.Select(0, textBox1.Text.Length); // Set the ErrorProvider error with the text to display. this.errorProvider1.SetError(textBox1, errorMsg); } }