Ich weiß nicht, was das eigentliche Problem ist, da kein Fehler gemeldet wird. Ich möchte, dass diese Codes einen Transaktionsdatensatz in die Datenbank einfügen, aber nichts wird zurückgegeben. Hier sind die Codes, die im Zusammenhang mit dieser:mysql, vb.net - Speichern der Transaktion funktioniert nicht
Main
Private Sub PayButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PayButton.Click
Dim payment As New Payment
payment.Show()
AddHandler payment.PaymentEvent, AddressOf paymentSuccess
payment.PaymentAmount = TransactionTotal
End Sub
Public Sub paymentSuccess(ByVal sender As Object, ByVal e As Payment.PaymentMadeEventArgs)
mydbcon = New MySqlConnection
mydbcon.ConnectionString = "server=localhost;userid=root;password=;database=sdudb"
Dim reader As MySqlDataReader
Try
mydbcon.Open()
Dim Query As String
Query = "select * from inventory"
COMMAND = New MySqlCommand(Query, mydbcon)
reader = COMMAND.ExecuteReader()
While reader.Read
Dim itId As Integer = reader.GetString("itemid")
Dim itName As String = reader.GetString("itemname")
If e.PaymentSuccess = True Then
paymentSuccessQuery(itId, itName)
End If
End While
reader.Close()
mydbcon.Close()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub paymentSuccessQuery(ByVal itemid, ByVal itemname) mydbcon = New MySqlConnection mydbcon.ConnectionString = "server=localhost;userid=root;password=;database=sdudb" Dim reader As MySqlDataReader Try mydbcon.Open() Dim Query As String Query = "INSERT INTO transaction (itemid, itemname) VALUES('" & itemid & "', '" & itemname & "')" COMMAND = New MySqlCommand(Query, mydbcon) reader = COMMAND.ExecuteReader() If reader.Read Then MessageBox.Show("Unable to save transaction!") Else MessageBox.Show("Transaction Saved!") End If reader.Close() mydbcon.Close() Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub
Transaction
Public Class Payment
Public Delegate Sub PaymentMadeEvent(ByVal sender As Object, ByVal e As PaymentMadeEventArgs)
Public Event PaymentEvent As PaymentMadeEvent
Private _paymentAmount As Decimal
Public Property PaymentAmount As Decimal
Get
Return _paymentAmount
End Get
Set(ByVal value As Decimal)
_paymentAmount = value
AmountBox.Text = String.Format("{0:c}", _paymentAmount)
End Set
End Property
Private Sub PayButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PayButton.Click
Dim total As Decimal = 0
Try
total = Decimal.Parse(AmountBox.Text.TrimStart("₱")) - Decimal.Parse(PaymentBox.Text)
Catch
MessageBox.Show("Error Occured, please enter a valid amount!")
Return
End Try
If (total > 0) Then
AmountBox.Text = total.ToString()
Else
MessageBox.Show("Please give " + String.Format("{0:c}", -total))
RaiseEvent PaymentEvent(Me, New PaymentMadeEventArgs() With {.PaymentSuccess = True})
End If
End Sub
Public Class PaymentMadeEventArgs
Inherits EventArgs
Private _paymentSuccess As Boolean
Public Property PaymentSuccess As Boolean
Get
Return _paymentSuccess
End Get
Set(ByVal value As Boolean)
_paymentSuccess = value
End Set
End Property
End Class
End Class