.cs文件,读取数据库,红色部分label出现问题。提示未将对象引用设置到对象的实例。 protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = dbhelper.ceratcon();
con.Open();
//--------------------已有角色加载------------------------------
SqlCommand cmd1 = new SqlCommand("select log_doctor from login where log_username = '" + Session["username"] + "'", con); SqlDataReader dataReader = cmd1.ExecuteReader();
while (dataReader.Read())
{
string doctor_state = dataReader["log_doctor"].ToString();
if (doctor_state == "1") Label_s1.Text = "医生";
}
dataReader.Close();
con.Close(); }
看看 Session["username"]