OracleException Class

The OracleException class represents an exception that is thrown when the Oracle Data Provider for .NET encounters an error. Each OracleException object contains at least one OracleError object in the Error property that describes the error or warning.

Class Inheritance

System.Object

  System.Exception

    System.SystemException

      System.Runtime.InteropServices.ExternalException (ADO.NET 2.0 only)

        System.Data.Common.DbException (ADO.NET 2.0 only)

         Oracle.DataAccess.Client.OracleException

Declaration

// C#
public sealed class OracleException : SystemException

Thread Safety

All public static methods are thread-safe, although instance methods do not guarantee thread safety.

Remarks

If there multiple errors, ODP.NET only returns the first error message on the stack.

Example

// C#
 
using System;
using System.Data;
using Oracle.DataAccess.Client;
 
class OracleExceptionSample
{
  static void Main()
  {
    string constr = "User Id=scott;Password=tiger;Data Source=oracle";
    OracleConnection con = new OracleConnection(constr);
    con.Open();
 
    // Create an OracleCommand object using the connection object
    OracleCommand cmd = con.CreateCommand();
 
    try
    {
      cmd.CommandText = "insert into notable values (99, 'MyText')";
      cmd.ExecuteNonQuery();
    }
    catch (OracleException ex)
    {
      Console.WriteLine("Record is not inserted into the database table.");
      Console.WriteLine("Exception Message: " + ex.Message);
      Console.WriteLine("Exception Source: " + ex.Source);
    }
  }
}

Requirements

Namespace: Oracle.DataAccess.Client

Assembly: Oracle.DataAccess.dll

Microsoft .NET Framework Version: 1.x or 2.0

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OracleException Members

OracleException members are listed in the following tables:

OracleException Static Methods

The OracleException static method is listed in Table 5-57.

OracleException Properties

OracleException properties are listed in Table 5-58.

OracleException Methods

OracleException methods are listed in Table 5-59.

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OracleException Static Methods

The OracleException static method is listed in Table 5-60.

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OracleException Properties

OracleException properties are listed in Table 5-61.

DataSource

This property specifies the TNS name that contains the information for connecting to an Oracle instance.

Declaration

// C#
public string DataSource {get;}

Property Value

The TNS name containing the connect information.

Errors

This property specifies a collection of one or more OracleError objects that contain information about exceptions generated by the Oracle database.

Declaration

// C#
public OracleErrorCollection Errors {get;}

Property Value

An OracleErrorCollection.

Remarks

The Errors property contains at least one instance of OracleError objects.

Message

Overrides Exception

This property specifies the error messages that occur in the exception.

Declaration

// C#
public override string Message {get;}

Property Value

A string.

Remarks

Message is a concatenation of all errors in the Errors collection. Each error message is concatenated and is followed by a carriage return, except the last one.

Number

This property specifies the Oracle error number.

Declaration

// C#
public int Number {get;}

Property Value

The error number.

Remarks

This error number can be the topmost level of error generated by Oracle and can be a provider-specific error number.

Procedure

This property specifies the stored procedure that caused the exception.

Declaration

// C#
public string Procedure {get;}

Property Value

The stored procedure name.

Source

Overrides Exception

This property specifies the name of the data provider that generates the error.

Declaration

// C#
public override string Source {get;}

Property Value

The name of the data provider.

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OracleException Methods

OracleException methods are listed in Table 5-62.

GetObjectData

Overrides Exception

This method sets the serializable info object with information about the exception.

Declaration

// C#
public override void GetObjectData(SerializationInfo info, StreamingContext 
    context);

Parameters

• info

  A SerializationInfo object.

• context

  A StreamingContext object.

Remarks

The information includes DataSource, Message, Number, Procedure, Source, and StackTrace.

ToString

Overrides Exception

This method returns the fully qualified name of this exception, the error message in the Message property, the InnerException.ToString() message, and the stack trace.

Declaration

// C#
public override string ToString();

Return Value

The string representation of the exception.

Example

// C#
 
using System;
using Oracle.DataAccess.Client;
 
class ToStringSample
{
  static void Main()
  {
    string constr = "User Id=scott;Password=tiger;Data Source=oracle";
    OracleConnection con = new OracleConnection(constr);
    con.Open();
 
    // Create an OracleCommand object using the connection object
    OracleCommand cmd = con.CreateCommand();
 
    try
    {
      cmd.CommandText = "insert into notable values (99, 'MyText')";
      cmd.ExecuteNonQuery();  // This will throw an exception
    }
    catch (OracleException ex)
    {
      Console.WriteLine("Record is not inserted into the database table.");
      Console.WriteLine("ex.ToString() : " + ex.ToString());
    }
  }
}