How to create GUID Autonumber programmatically in ms access
How do I create guid autonumber field programmatic开发者_StackOverflow社区ally using C#?
In order to make your GUID field auto-increment, use GenGUID() as it's default value.
This works in Access using ADO. Perhaps a similar statement will work in C#:
CurrentProject.Connection.Execute "CREATE TABLE hede (Id Guid DEFAULT GenGUID())"
If its C# then
string myguid = Guid.NewGuid.ToString;
If its Access then
Private Declare Function CreateGuid Lib "OLE32.DLL" (pGuid As GUID) As Long
Private Declare Function StringFromGUID2 Lib "OLE32.DLL" (pGuid As GUID, ByVal PointerToString As Long, ByVal MaxLength As Long) As Long
Private Type GUID
Guid1 As Long
Guid2 As Integer
Guid3 As Integer
Guid4(0 To 7) As Byte
End Type
Public Function CreateGUIDKey() As String
Const GUID_OK As Long = 0
Const GUID_LENGTH As Long = 38
Dim udtGUID As GUID
Dim FormattedGUID As String
Dim Result As Long
Result = CreateGuid(udtGUID)
If Result = GUID_OK Then
FormattedGUID = String$(GUID_LENGTH, 0)
StringFromGUID2 udtGUID, StrPtr(FormattedGUID), GUID_LENGTH + 1
Else
FormattedGUID = ""
End If
CreateGUIDKey = FormattedGUID
End Function
This might be helpful:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q180841
Also, using DAO:
What is the MS Access SQL syntax to create a field of type Hyperlink?
Do you know how to run sql against a Jet or ACE connection?
CREATE TABLE Literal (LinkID GUID)
INSERT INTO Literal (LinkID) VALUES ({guid {11223344-1122-1122-1122-AABBCCDDEEFF}})
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