SqlConnection sqlCon = new SqlConnection(@"Server =(local);Integrated Security = True;"+"Database = IT登陆");
sqlCon.Open();
SqlCommand sqlCom = new SqlCommand();
sqlCom.Connection = sqlCon;
sqlCom.CommandText ="SELECT * FROM 用户信息 WHERE IT号码 = '"+this.comboBox1.Text +"'AND IT密码 ='"+textBox2.Text+"'";
SqlDataReader thisReader = sqlCom.ExecuteReader();