Question

Can someone please advise – we want to log a detailed error message to a text file or sql server for any error occurred in .net library which we created.

Try
    'Here we are using the sql command object to fetch the required data
    Catch ex As Exception
    'Here we want to capture detailed error information in a text file or 
    'sql server
Finally
    If Not _SQLCommand Is Nothing Then
        _SQLCommand.Dispose()
    End If
    If Not _Conn Is Nothing Then
        _EConn.Close()
    End If
End Try

Answer 1

You can try something like this:-

Try
 'do some stuff
 Catch ex As Exception
    errorArg = "Error details and description." 
    errorHandle(errorArg, ex)
  Sub errorHandle(ByVal errorArg As String, ByVal ex As System.Exception)
    Dim errorFile As String = "C:\Foldername\errorfile.txt"
    Dim errorWrite As New IO.StreamWriter(errorFile, True)
    Dim machname As String = System.Environment.MachineName.ToString
    Dim close As DialogResult = MessageBox.Show(errorArg & vbCrLf & "Message", "System    Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
    errorWrite.Write("*** ERROR on " & curDate & " @ " & machname & vbCrLf & errorArg & vbCrLf &   ex.ToString & vbCrLf)
    errorWrite.Close()
    If close = DialogResult.OK Then End
  End Sub