public void btnSend_Click(object sender, EventArgs e) { try { if (txtAddress.Text.Trim() == string.Empty) { MessageBox.Show("邮件地址不能为空!"); return; } if (txtMail.Text.Trim() == string.Empty) { MessageBox.Show("邮件内容不能为空!"); return; } FrameBaseFunction.ClseMail clsMail = new FrameBaseFunction.ClseMail(); clsMail.MailSend(txtAddress.Text.Trim(), txtSubject.Text.Trim(), txtMail.Text.Trim()); DialogResult = DialogResult.OK; } catch (Exception ee) { MessageBox.Show("邮件发送失败! " + ee.Message); } }