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Using the equivalent of Dlookupand Dmax functions from MS Access in Visual Studio 2008

Posted on 2009-04-15
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Last Modified: 2013-11-26
Hi there
I am new to Visual studio (using the VB mosule) and am battling a bit with returning values from and writing values to an MS Access table.
I need to do a Dlookup and a DMax on the ControlNo field in a table called tblControlNo in an MS Access DB.
Is there a functions list that I can look these up for myself or do I need to go the slog of asking questions of you bgurus every time I need to do some command in VB
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Question by:caandal
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Dhaest earned 1500 total points
ID: 24146928
DLookup is specific to Microsoft Access and VBA and there currently is no language-integrated query functionality equivalent in .NET. You would need to use the OLEDB namespace library and ADO.NET data objects to query the database.

The next version of Visual Studio (ORCAS) will have something similar to this feature called Linq and DLinq. There is a CTP available if you're interested:

http://msdn2.microsoft.com/en-us/netframework/aa904594.aspx

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by:Dhaest
ID: 24146933
.NET has several ways to achieve what you want depending on how you're storing your data.

1. LINQ
2. ADO.NET database query (SELECT MyColumn FROM MyTable WHERE MyColumn = SOMEVALUE )
3. .Find Delegate (supported on some collections)
4. Dataset/DataView filters
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by:Dhaest
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by:caandal
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Hi Dhaest.  You have pointed me in the right direction
tx
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