c# - Oracle CLOB storing Arabic Numbers in form of '?' -


i working on desktop c# application. 1 of field of type clob. data enter assign in c# based variable upon storing value in oracle store number '?'. instance if string hi۱۲۳, upon storing becomes hi???

it happening number, rest of text in arabic text saves fine.

upon running query:

select dump(content) mytable

gives error:

[err] ora-00932: inconsistent datatypes: expected - got clob

below code insert clob

public void insertclob(string sqlstatement, string str)         {              system.data.oracleclient.oracledatareader rstoracle = null;              system.data.oracleclient.oraclecommand sqlcommandoracle = null;              system.data.oracleclient.oracletransaction txn = null;              system.data.oracleclient.oraclelob clob = null;              try              {                  if (sqlstatement.length > 0)                  {                      if (myconnection.state.tostring().equals("open"))                      {                          byte[] newvalue = system.text.encoding.unicode.getbytes(str);                          sqlcommandoracle =                            new system.data.oracleclient.oraclecommand(sqlstatement, myconnection);                          rstoracle = sqlcommandoracle.executereader();                          rstoracle.read();                          txn = myconnection.begintransaction();                          clob = rstoracle.getoraclelob(0);                          clob.write(newvalue, 0, newvalue.length);                          txn.commit();                          console.writeline("clob updated");                      }                  }              }              catch (exception ex)              {                  console.writeline(ex.targetsite + " - " + ex.message);              }                           {                  sqlcommandoracle.dispose();                  rstoracle.close();                  txn.dispose();                  clob.close();              }          }


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