private void btnSave_Click(object sender, EventArgs e)
{
//todo:判断字段不能为空
string username = txtUserName.Text;
string password = txtPwd.Text;
string phoneNum = txtPhoneNum.Text;
int age = Convert.ToInt32(txtAge.Text);
bool exists;
userBll.Add2(username, password, phoneNum, age, out exists);
if (exists)
{
MessageBox.Show("用户名已经存在");
}
else
{
this.Close();//窗口关闭
}
//userBll.Add(username, password, phoneNum, age);
}