Search and Replace with Regular Expressions

March 17, 2008
By Paul Kimmel

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You can use the Find-replace sequence of

"F{:c+}

"m_\1

to replace the F prefix in the field name in the storage argument with an m_ prefix, and you can use the following pairing to fix the Return and assignment statements in the Property getters and setters.

:WhF{:c+}

m_\1

Of course, the previous pairing will also Find "Function", "For", the property "Fax", and "firstFive". You could add the prevent match element ~(X) sub-expression to eliminate these from the search results, for example

:WhF~(unction)~(ax)~(or)~(irstFive){:c+}

m_\1

and the regular expression would successfully skip "Function", "For", "Fax", and "firstFive". Here is the completely revised code after the find and replace operation using the three variations of expressions on the code (see Listing 2).

Listing 2: The same code as listing 1 with the modified field elements using a more conventional naming style.

Imports System.Data.Linq
Imports System.Data.Linq.Mapping
Imports System.Reflection
Imports System.Text

Module Module1

   Sub Main()

      Const connectionString As String = _
         "Data Source=.\SQLEXPRESS;AttachDbFilename=c:\temp\ _
            northwnd.mdf;" + _
         "Integrated Security=True;Connect Timeout=30; _
            User Instance=True"

      Dim northwind As Northwind = _
         New Northwind(connectionString)
      Dim customers As Table(Of Customer) = _
         northwind.GetTable(Of Customer)()

      Dim firstFive = customers.Take(5)
      For Each item In firstFive
         Console.WriteLine(item)
      Next
         Console.ReadLine()
      End Sub

End Module

Public Class Northwind
   Inherits DataContext

   Public Sub New(ByVal connectionString As String)
      MyBase.New(connectionString)
      Me.Log = Console.Out
   End Sub

End Class

<Table(Name:="Customers")> _
Public Class Customer

   Private m_CustomerID As String
   Private m_CompanyName As String
   Private m_ContactName As String
   Private m_ContactTitle As String
   Private m_Address As String
   Private m_City As String
   Private m_Region As String
   Private m_PostalCode As String
   Private m_Country As String
   Private m_Phone As String
   Private m_Fax As String

   <Column(Name:="CustomerID", Storage:="m_CustomerID")> _
   Public Property CustomerID() As String
      Get
         Return m_CustomerID
      End Get
      Set(ByVal value As String)
         m_CustomerID = value
      End Set
   End Property

   <Column(name:="CompanyName", Storage:="m_CompanyName")> _
      Public Property CompanyName() As String
      Get
         Return m_CompanyName
      End Get
      Set(ByVal value As String)
         m_CompanyName = value
      End Set
   End Property

   <Column(name:="ContactName", Storage:="m_ContactName")> _
   Public Property ContactName() As String
      Get
         Return m_ContactName
      End Get
      Set(ByVal value As String)
         m_ContactName = value
      End Set
   End Property

   <Column(name:="ContactTitle", Storage:="m_ContactTitle")> _
      Public Property ContactTitle() As String
      Get
         Return m_ContactTitle
      End Get
      Set(ByVal value As String)
         m_ContactTitle = value
      End Set
   EndProperty

   <Column(name:="Address", Storage:="m_Address")> _
      Public Property Address() As String
      Get
         Return m_Address
      End Get
      Set(ByVal value As String)
         m_Address = value
      End Set
   End Property

   <Column(name:="City", Storage:="m_City")> _
      Public Property City() As String
      Get
         Return m_City
      End Get
      Set(ByVal value As String)
         m_City = value
      End Set
   EndProperty

   <Column(name:="Region", Storage:="m_Region")> _
      Public Property Region() As String
      Get
         Return m_Region
      End Get
      Set(ByVal value AsString)
         m_Region = value
      End Set
   End Property

   <Column(name:="PostalCode", Storage:="m_PostalCode")> _
      Public Property PostalCode() As String
      Get
         Return m_PostalCode
      End Get
      Set(ByVal value As String)
         m_PostalCode = value
      End Set
   End Property

   <Column(name:="Country", Storage:="m_Country")> _
      Public Property Country() As String
      Get
         Return m_Country
      End Get
      Set(ByVal value As String)
         m_Country = value
      End Set
   End Property

   <Column(name:="Phone", Storage:="m_Phone")> _
      Public Property Phone() As String
      Get
         Return m_Phone
      End Get
      Set(ByVal value As String)
         m_Phone = value
      End Set
   End Property

   <Column(name:="Fax", Storage:="m_Fax")> _
      Public Property Fax() As String
      Get
         Return m_Fax
      End Get
      Set(ByVal value As String)
         m_Fax = value
      End Set
   End Property

   Public Overrides Function ToString() As String

      Dim builder As StringBuilder = New StringBuilder()
      builder.AppendFormat("{0}", Me.GetType().Name)
      builder.AppendLine()
      builder.AppendFormat("{0}", New String("-", 40))
      builder.AppendLine()

   Dim info() As PropertyInfo = Me.GetType().GetProperties()

      For Each prop In info
         Try
            Dim value As Object = prop.GetValue(Me, Nothing)
            builder.AppendFormat("{0}: {1}n", prop.Name, value)
         Catch ex As Exception
            builder.AppendFormat("{0}: {1}", prop.Name, "None")
         End Try
         builder.AppendLine()
      Next

      Return builder.ToString()
   End Function


End Class