UserHelper.loginPwd = txtLoginPwd.Text;
但是加断点调试时看到的值是空值，这是怎么回事？
这是应该显示用户信息的页面！
txtLogId.Text = UserHelper.loginId;
txtpwd.Text = UserHelper.loginPwd;
string constr = "Server=.;DataBase=MySchool;Uid=sa;Pwd=yule9616866@;Integrated Security=true";
SqlConnection con = new SqlConnection(constr);
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select LoginPwd,UserStateId,TeacherName,Sex,Birthday from Teacher where LoginId = '" + txtLogId.Text + "'and LoginPwd='"+txtpwd .Text+"'";
SqlDataReader dr = cmd.ExecuteReader();
dr.Read();
txtLogId.Text = dr["LoginId"].ToString();
txtpwd.Text = dr["LoginPwd"].ToString();
txtSpwd.Text = "";
cmbLogState.Text = dr["UserStateId"].ToString();
txtLogName.Text = dr["TeacherName"].ToString();
txtLogSex.Text = dr["Sex"].ToString();
dateTimePicker1.Text = dr["Birthday"].ToString();
静态类我试了可还是空，是我写错了吗
