VB.NET

Access database in a class Constructor

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Join Date: Aug 2008

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Jostra

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Access database in a class Constructor

Aug 14th, 2009

Hi! everyone can some one share a piece of light with me is it possible to manipulate database access inside a class constructor.Cause i can create a connection but don't know how i'm going to things like data adapter an data set since.Any link Any Help Is appreciated.thanks

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Join Date: Apr 2008

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bcasp

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Re: Access database in a class Constructor

Aug 14th, 2009

It would probably be possible, but I would probably rethink why there are database calls inside of the constructor. I would rather split it out into a separate call.

Here's a link to a Microsoft Patterns and Practices article. If it can't answer questions about how to handle database connectivity then I don't know what will:

http://msdn.microsoft.com/en-us/library/ms978510.aspx

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adatapost

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Re: Access database in a class Constructor

Aug 16th, 2009

 Help with Code Tags 
 vb.net Syntax (Toggle Plain Text) 
public class DBClass
     ... 
     public Function GetTable(Sql as String) as DataTable
         Dim Adp as new SqlDataAdapter(sql,CnStr)
         Dim  Dt as New DataTable
         Adp.Fill(Dt)
         Return Dt
     End Function
 
End Class
.....
....
Dim cs as new DBClass
Dim Ds as new DataSet("TestDS")
Ds.Tables.Add(cs.getTable("Select * from Table1"),"Table1")
...
public class DBClass
     ... 
     public Function GetTable(Sql as String) as DataTable
         Dim Adp as new SqlDataAdapter(sql,CnStr)
         Dim  Dt as New DataTable
         Adp.Fill(Dt)
         Return Dt
     End Function

End Class
.....
....
Dim cs as new DBClass
Dim Ds as new DataSet("TestDS")
Ds.Tables.Add(cs.getTable("Select * from Table1"),"Table1")
...

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Join Date: Aug 2008

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Jostra

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Re: Access database in a class Constructor

Aug 17th, 2009

Thanks adapost i truly didnt know this like i said on my thread, can you please explain to me how do i define an adapter in a class. i appreciate thank