private void login_Click(object sender, EventArgs e)
{
string user_name = user_test.Text.ToString();
string password = password_test.Text.ToString();
if (string.IsNullOrWhiteSpace(user_name))
{
user_name_err.SetError(user_test, "账号不能为空");
return;
}
if (string.IsNullOrWhiteSpace(password))
{
user_pwd_err.SetError(password_test, "密码不能为空");
return;
}
if (client != null)
{
client.LogOut();
client = null;
}
client = new Client(user_name, password);
}