How to avoid Database locked error in sqlite

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Hi
I am trying to insert a record into a table but getting database locked error in sqlite. I am writing my code in vb.net 2010 and using sqlite3.0 as database.

VB

If Conn.State = ConnectionState.Open Then Conn.Close()
            Conn.Open()
            q1Var = "insert into mstrs(Code,Name,Vil,Adrs,Pin,type,stts) values(" & ID & ",'" & TextBox1.Text & "','" & TextBox2.Text & "','" & TextBox3.Text & "','" & TextBox4.Text & "','d',1)"
            Dim cmd1 As New SQLiteCommand(q1Var, Conn)
            cmd1.ExecuteNonQuery()
            If Conn.State = ConnectionState.Open Then Conn.Close()

Thanks in advance
Santosh Sharma

Posted 29-Sep-14 7:08am

sansharam

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sansharam · Accepted Answer · 2014-09-29T07:29:00

Sorry to all...

sqlite needs the Datareader also to be closed before trying to use the connection for other task.

I had used the connection for a select query in which I closed connection without closing reader.

the below code modification (Marked in Bold and Underlined) solved my problem

VB

If Conn.State = ConnectionState.Open Then Conn.Close()
       Conn.Open()
       Dim ID As Integer = 0
       Dim cmdDis As New SQLiteCommand("select coalesce(Max(Code),0) from mstrs where type='d'", Conn)
       Dim Display As SQLiteDataReader = cmdDis.ExecuteReader()
       If Display.HasRows Then
           //do the stuff here......
       End If
       cmdDis.Dispose()
       Display.Close()
       If Conn.State = ConnectionState.Open Then Conn.Close()
   End Sub

Regards
Santosh Sharma