DB2ResultSet.Read(). ERROR [24000] [IBM] CLI0115E Invalid cursor state. SQLSTATE=24000 - db2

Question

We have problem with the application run DB2ResultSet.Read(). Sometime will get ERROR :
[24000] [IBM] CLI0115E Invalid cursor state. SQLSTATE=24000.
Database : DB2 for Linux, UNIX and Windows V10.5
Client: Windows 7 64bit
Method:
public int EventGetEvSegmentCnt(string SegmentID, string strEvntGroup)
{
int strGroupCnt = 0;
string strSQL = string.Empty;`enter code here`
DB2ResultSet objRs;
if (string.IsNullOrEmpty(SegmentID) || string.IsNullOrEmpty(strEvntGroup))
{
strGroupCnt = 0;
}
else
{
strSQL = " SELECT COUNT(EVNT_CODE) AS EVNT_GROUP_COUNT FROM E_SEGMENT_EVENT WHERE C_SEGMENT_ID = " + SegmentID + " AND EVNT_GROUP = " + strEvntGroup;
Common.DatabaseHelper helper = new Common.DatabaseHelper();
objRs = helper.ExecuteResultSet(strSQL);
if (objRs.Read())
{
strGroupCnt = 0;
}
else
{
strGroupCnt = int.Parse(objRs["EVNT_GROUP_COUNT"].ToString());
}
}
return strGroupCnt;
}
Error Message:
[Information] System.Web.HttpUnhandledException (0x80004005):
Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> IBM.Data.DB2.DB2Exception (0x80004005): ERROR [24000] [IBM] CLI0115E Invalid cursor state. SQLSTATE=24000
at IBM.Data.DB2.DB2DataBuffer.FetchScroll(FetchType fetchType, Int64 offset, Int32 numRows)
at IBM.Data.DB2.DB2DataBuffer.FetchNext()
at IBM.Data.DB2.DB2DataReader.Fetch(FetchDirection direction, Int64 offset, Boolean& isDeleted)
at IBM.Data.DB2.DB2ResultSet.Read()
Please help.
DatabaseHelper:
public class DatabaseHelper
{
public DatabaseHelper()
{
}
public DataSet ExecuteDataSet(string commandText, List<DB2Parameter> parameters = null)
{
var command = GetCommand(commandText, parameters);
var adapter = new DB2DataAdapter();
adapter.SelectCommand = command;
var ds = new DataSet();
adapter.Fill(ds);
adapter.Dispose();
return ds;
}
public DB2DataReader ExecuteReader(string commandText, List<DB2Parameter> parameters = null)
{
var command = GetCommand(commandText, parameters);
return command.ExecuteReader(CommandBehavior.CloseConnection);
}
public DB2ResultSet ExecuteResultSet(string commandText, List<DB2Parameter> parameters = null)
{
var command = GetCommand(commandText, parameters);
//DB2ResultSet result = command.ExecuteResultSet(CommandBehavior.Default, DB2CursorType.Dynamic);
DB2ResultSet result = command.ExecuteResultSet(CommandBehavior.CloseConnection, DB2CursorType.Dynamic);
return result;
}
public DB2ResultSet ExecuteResultSetStatic(string commandText, List<DB2Parameter> parameters = null)
{
var command = GetCommand(commandText, parameters);
// DB2ResultSet result = command.ExecuteResultSet(CommandBehavior.Default, DB2CursorType.Static);
DB2ResultSet result = command.ExecuteResultSet(CommandBehavior.CloseConnection, DB2CursorType.Static);
return result;
}
public int ExecuteNonQuery(string commandText, List<DB2Parameter> parameters = null)
{
var command = GetCommand(commandText, parameters);
int result = command.ExecuteNonQuery();
command.Connection.Close();
return result;
}
public void ExecuteSQLArray(string[] arrSQL)
{
var command = new DB2Command();
command.Connection = GetConnection();
command.CommandType = CommandType.Text;
command.CommandTimeout = 600;
command.Transaction = command.Connection.BeginTransaction();
try
{
foreach (string strSQL in arrSQL)
{
if (!string.IsNullOrEmpty(strSQL))
{
command.CommandText = strSQL;
command.ExecuteNonQuery();
}
}
command.Transaction.Commit();
}
catch (Exception)
{
command.Transaction.Rollback();
throw;
}
command.Connection.Close();
command.Dispose();
}
public DB2Connection GetConnection()
{
var conn = new DB2Connection(System.Configuration.ConfigurationManager.ConnectionStrings["DB2_Conn"].ConnectionString);
conn.Open();
return conn;
}
public DB2Command GetCommand(string commandText, List<DB2Parameter> parameters)
{
var command = new DB2Command(commandText);
command.Connection = GetConnection();
command.CommandTimeout = 600;
if (parameters != null)
{
foreach (var parameter in parameters)
{
command.Parameters.Add(parameter);
}
}
return command;
}
}

Answer 1

try this :
public int EventGetEvSegmentCnt(string SegmentID, string strEvntGroup)
{
if (string.IsNullOrEmpty(SegmentID) || string.IsNullOrEmpty(strEvntGroup)) return 0;
int strGroupCnt = 0;
DataSet objDS=null;
string strSQL = string.Format(" SELECT COUNT(EVNT_CODE) AS EVNT_GROUP_COUNT FROM E_SEGMENT_EVENT WHERE C_SEGMENT_ID ={0} AND EVNT_GROUP = {0}", SegmentID, strEvntGroup);
try
{
Common.DatabaseHelper helper = new Common.DatabaseHelper();
objDS = helper.ExecuteDataSet(strSQL);
if (objRs.Table[0].Rows.Count > 0)
{
strGroupCnt = int.Parse(objDS.Tables[0].Rows[0]["EVNT_GROUP_COUNT"].ToString());
}
}
finally
{
if (objDS != null) objDS.Dispose()
return strGroupCnt;
}
}