Execute reader throwing error

Question

0.00/5 (No votes)

See more:

Hi,

I have two database smart04 and smart02, I can connect smartt02 db successfully but the smart02 error is throwing error in the execute reader line. but I can see the connection is in open state.

Anyone please help me to fix this.

Error:
StackTrace = " at OracleInternal.ServiceObjects.OracleConnectionImpl.VerifyExecution(Int32& cursorId, Boolean bThrowArrayBindRelatedErrors,
SqlStatementType sqlStatementType, Int32 arrayBindCount, OracleException& exceptionForArrayBindDML, Boolean& hasMoreRowsInDB, Boolean bFirstIterationDone)\r\n
at OracleInternal.ServiceObjects.OracleCommandImpl.
ExecuteReader(String commandText, OracleParameterCollection paramColl, CommandType commandType, OracleConnectionImpl connectionImpl,
OracleDataReaderImpl& rdrImpl, Int32 longFetchSize, Int64 clientInitialLOBFS, OracleDependencyImpl orclDependencyImpl, Int64[] scnForExecution,
Int64[]& scnFromExecution, OracleParameterCollection& bindByPositionParamColl, Boolean& bBindParamPresent, Int64& internalInitialLOBFS,
OracleException& exceptionForArrayBindDML, OracleConnection connection, OracleLogicalTransaction& oracleLogicalTransaction,
IEnumerable`1 adrianParsedStmt, Boolean isDescribeOnly, Boolean isFromEF)\r\n
at Oracle.ManagedDataAccess.Client.OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior)\r\n
at Oracle.ManagedDataAccess.Client.OracleCommand.ExecuteReader()\r\n

What I have tried:

C#

SQLHelper conn = new SQLHelper();
                OracleConnection con = conn.GetConnectionString(dbname);

                OracleCommand cmd = new OracleCommand();
                cmd.CommandType = System.Data.CommandType.StoredProcedure;
                cmd.CommandText = "XYZ";
                cmd.Connection = con;
                con.Open();
                // cmd.ExecuteNonQuery();
                ConnectionState state = con.State;
                if (state == ConnectionState.Open)
                {
                     var j = cmd.ExecuteReader();
                    //cmd.ExecuteNonQuery();

                    string i = cmd.Parameters["val"].Value.ToString();
}
con.Close();

XML

<add name="smart02" connectionstring="Data Source=  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.150.5.46)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = smart02) 
    ));user id=xxxx;password=yyyy;" providername="System.Data.OracleClient">

<add name="smart04" connectionstring="Data Source=  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.150.5.46)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = smart04) 
    ));user id=xxxx;password=yyyy;" providername="System.Data.OracleClient">

Posted 10-Jul-20 0:31am

Developer29

Updated 10-Jul-20 1:49am

MadMyche

v5

Add a Solution

Comments

Richard Deeming 10-Jul-20 7:07am

You've pasted the stack trace, but removed the actual error details.

Click the green "Improve question" link and update your question to include the full details of the exception.

Garth J Lancaster 10-Jul-20 21:01pm

It would also be handy if you posted the definition of the stored procedure if its 'small' enough

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Garth J Lancaster · Answer 1 · 2020-07-10T01:48:00

It's not clear how many values you're expecting - for a single value, ExecuteNonQuery will do
1) Im not sure you need to fanangle with the connection state as such
2) it doesnt look like you've defined an output parameter
3) manually closing a connection is so passe - using blocks should be applied instead .. so maybe

string i = "";
SQLHelper conn = new SQLHelper();
using (OracleConnection connection = new OracleConnection(conn.GetConnectionString(dbname)))
using (OracleCommand command = new OracleCommand("XYZ", connection))             
{
  command.CommandType = CommandType.StoredProcedure;
  command.Parameters.Add("val", OracleDbType.Varchar2, 120);
  command.Parameters["val"].Direction = ParameterDirection.Output;
  connection.Open();
  command.ExecuteNonQuery();
  i = command.Parameters["val"].Value.ToString();
}