OdbcException Class

Definition

public ref class OdbcException sealed : System::Data::Common::DbException

public sealed class OdbcException : System.Data.Common.DbException

type OdbcException = class
    inherit DbException

Public NotInheritable Class OdbcException
Inherits DbException

Inheritance

Object

Exception

SystemException

ExternalException

DbException

OdbcException

Examples

The following example generates an OdbcException because of a missing data source, and then displays the exception.

public void ShowOdbcException()
{
   string mySelectQuery = "SELECT column1 FROM table1";
   OdbcConnection myConnection =
      new OdbcConnection("DRIVER={SQL Server};SERVER=MyServer;Trusted_connection=yes;DATABASE=northwind;");
   OdbcCommand myCommand = new OdbcCommand(mySelectQuery,myConnection);
   try
   {
      myCommand.Connection.Open();
   }
   catch (OdbcException e)
   {
     string errorMessages = "";

     for (int i=0; i < e.Errors.Count; i++)
     {
         errorMessages += "Index #" + i + "\n" +
                          "Message: " + e.Errors[i].Message + "\n" +
                          "NativeError: " + e.Errors[i].NativeError.ToString() + "\n" +
                          "Source: " + e.Errors[i].Source + "\n" +
                          "SQL: " + e.Errors[i].SQLState + "\n";
     }

     System.Diagnostics.EventLog log = new System.Diagnostics.EventLog();
     log.Source = "My Application";
     log.WriteEntry(errorMessages);
     Console.WriteLine("An exception occurred. Please contact your system administrator.");
   }
}

Public Sub ShowOdbcException()
    Dim mySelectQuery As String = "SELECT column1 FROM table1"
    Dim myConnection As New OdbcConnection _
       ("DRIVER={SQL Server};SERVER=MyServer;Trusted_connection=yes;DATABASE=northwind;")
    Dim myCommand As New OdbcCommand(mySelectQuery, myConnection)
    Try
        myCommand.Connection.Open()
    Catch e As OdbcException
        Dim errorMessages As String
        Dim i As Integer

        For i = 0 To e.Errors.Count - 1
            errorMessages += "Index #" & i.ToString() & ControlChars.Cr _
                           & "Message: " & e.Errors(i).Message & ControlChars.Cr _
                           & "NativeError: " & e.Errors(i).NativeError.ToString() & ControlChars.Cr _
                           & "Source: " & e.Errors(i).Source & ControlChars.Cr _
                           & "SQL: " & e.Errors(i).SQLState & ControlChars.Cr
        Next i

       Dim log As New System.Diagnostics.EventLog()
       log.Source = "My Application"
       log.WriteEntry(errorMessages)
       Console.WriteLine("An exception occurred. Please contact your system administrator.")
    End Try
End Sub

Remarks

This class is created whenever the OdbcDataAdapter encounters an error generated by the server (Client-side errors are raised as standard common language runtime exceptions.). It always contains at least one instance of OdbcError.

If the severity of the error is too great, the server may close the OdbcConnection. However, the user can reopen the connection and continue.

For general information about handling exceptions for a .NET Framework data provider, see SqlException.

See also

• OdbcErrorCollection
• Handling and throwing exceptions in .NET