sqlite3 データベースへの挿入中に、「制約違反の列 transid が一意ではないため、中止します」というエラーが発生しました。これが私のコードです。誰か助けてくれませんか?
Public Connection As SQLiteConnection
Public Function Getconnection() As SQLiteConnection
Connection = New SQLiteConnection
Connection.ConnectionString = "Data Source=" + Application.StartupPath + "\POS.s3db; Version=3;"
Connection.Open()
GetConnection = Connection
End Function
Using cmd As New SQLiteCommand(strSQL,Connection)
cmd.CommandType = CommandType.Text
strSQL = "insert into tbltrans2 (transid,itemcode,flddate,itemname,qty,price,total,btw,btwper) values ('@tid',@itemcode,'@date','@itemname','@qty','@price','@total','@btw',@btwper)"
cmd.Parameters.AddWithValue("tid", txtTransId.Text)
cmd.Parameters.AddWithValue("date", txtDate.Text)
''this is temp
For Each ls As ListViewItem In ListItems.Items
cmd.Parameters.AddWithValue("itemcode", ls.Tag)
cmd.Parameters.AddWithValue("itemname", ls.SubItems(0).Text)
cmd.Parameters.AddWithValue("qty", ls.SubItems(1).Text)
cmd.Parameters.AddWithValue("price", ls.SubItems(2).Text)
cmd.Parameters.AddWithValue("total", ls.SubItems(3).Text)
cmd.Parameters.AddWithValue("btw", (Double.Parse(ls.SubItems(5).Text) / 100) * (Double.Parse(ls.SubItems(3).Text)).ToString("#,##0.00"))
cmd.Parameters.AddWithValue("btwper", Double.Parse(ls.SubItems(5).Text))
cmd.ExecuteNonQuery()
Next ls
End Using