C# 源数组长度不足。请检查 srcIndex 和长度以及数组的下限。
 string strConn = "Data Source=127.0.0.1;Initial Catalog=zy;User ID=sa;Password=229107my229107m";
                        SqlConnection ConnAcc = new SqlConnection(strConn);
                        string strSQL = "SELECT * FROM Group_SGK3 ";
                        SqlDataAdapter de = new SqlDataAdapter(strSQL, ConnMdb);
                        try
                        {
                            //da.Fill(dt);
                            dtData.Clear();
                            de.Fill(dtData);

                        }
                        catch
                        {
                            break;
                        }
                            for (int n = 0; n < 7; n++)
                            {
                                int GK;
                                foreach (DataRow rdr in dtData.Rows)
                                {

                                    int SGK = Convert.ToInt32(rdr["SGK"]);
              &