Question

How to set "Allow Zero Lenght" in ms-access database programatically

Asked by: kkp01

i am using VB.NET, OLEDB to interect with access MDB files.

The following code creates the new table. I want the "Allow Zero Lenght" property to set to TRUE. By default it is set to false.

Please tell me how can I set the "Allow Zero Lenght" property of any Text field programatically ?

Dim oCmd As OleDb.OleDbCommand
            Dim cCmdStr = "Create Table TB1 (LName Text(25), LCode Text(5))"
            Dim cConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Test1.mdb;Persist Security Info=False"
            Dim Conn = New OleDb.OleDbConnection(cConnStr)
            oCmd = New OleDb.OleDbCommand(cCmdStr, Conn)
            Conn.Open()
            oCmd.ExecuteNonQuery()
            Conn.Close()

                                  
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Asked On
2009-09-26 at 03:30:17ID24763815
Tags

"Allow Zero Lenght" Access

Topics

.NET

,

Microsoft Visual Basic.Net

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Answers

 

by: hongjunPosted on 2009-09-26 at 04:07:22ID: 25429482

It is set to TRUE by default

 

by: kkp01Posted on 2009-09-26 at 04:35:31ID: 25429534

Yes, But when I open the MDB File and any of table structure in Access, It turns to FALSE.

Any way GOT THE SOLUTION from
see solution at
http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_20510684.html

I converted that to VB.NET way like this

Dim db As DAO.Database
            Dim eng As New DAO.DBEngine
            db = eng.Workspaces(0).OpenDatabase("test1.mdb")
            db.TableDefs("TB1").Fields("LCode").AllowZeroLength = True
            db.Close()

                                              
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