I'm trying to Update and Insert records in a MySQL database, I can do both in separate buttons but I want to do both queries from a single button. I want to do something like: If the ID (which is primary key) = Something then update, else insert, but I can't figure out what I can base that off. Ill include some of my code below.
INSERTING
Private Function saveCustomer()
Dim command As MySqlCommand = Nothing
Dim query As String = "INSERT INTO contacts (first_name, surname, house_number, street, suburb, state, phone, mobile, work, email, notes) VALUES (@first_name, @surname, @housenumber, @street, @suburb, @state, @phone, @mobile, @work, @email, @notes)"
Try
If connection.State = ConnectionState.Closed Then
connection.Open()
End If
command = New MySqlCommand(query, connection)
command.Parameters.AddWithValue("@first_name", txtFirstName.Text)
command.Parameters.AddWithValue("@surname", txtSurname.Text)
command.Parameters.AddWithValue("@housenumber", txtHouseNo.Text)
command.Parameters.AddWithValue("@street", txtStreet.Text)
command.Parameters.AddWithValue("@suburb", txtSuburb.Text)
command.Parameters.AddWithValue("@state", cboState.Text)
command.Parameters.AddWithValue("@phone", txtPhone.Text)
command.Parameters.AddWithValue("@mobile", txtMobile.Text)
command.Parameters.AddWithValue("@work", txtWork.Text)
command.Parameters.AddWithValue("@email", txtEmail.Text)
command.Parameters.AddWithValue("@notes", txtNotes.Text)
command.ExecuteNonQuery()
MessageBox.Show("Contact Saved Sucessfully")
Return True
Catch ex As MySqlException
Return False
Finally
connection.Close()
command.Dispose()
End Try
End Function
UPDATING
Private Sub updateContact()
Dim command As MySqlCommand = Nothing
Dim query As String = "UPDATE contacts SET first_name=@first_name, surname=@surname, house_number=@housenumber, street=@street, suburb=@suburb, state=@state, phone=@phone, mobile=@mobile, work=@work, email=@email, notes=@notes WHERE id= '" & ListView1.FocusedItem.SubItems(1).Text & "'"
Try
connection.Open()
command = New MySqlCommand(query, connection)
command.Parameters.AddWithValue("@first_name", txtFirstName.Text)
command.Parameters.AddWithValue("@surname", txtSurname.Text)
command.Parameters.AddWithValue("@housenumber", txtHouseNo.Text)
command.Parameters.AddWithValue("@street", txtStreet.Text)
command.Parameters.AddWithValue("@suburb", txtSuburb.Text)
command.Parameters.AddWithValue("@state", cboState.Text)
command.Parameters.AddWithValue("@phone", txtPhone.Text)
command.Parameters.AddWithValue("@mobile", txtMobile.Text)
command.Parameters.AddWithValue("@work", txtWork.Text)
command.Parameters.AddWithValue("@email", txtEmail.Text)
command.Parameters.AddWithValue("@notes", txtNotes.Text)
command.ExecuteNonQuery()
MessageBox.Show("Contact Updated Successfully")
Catch ex As MySqlException
MessageBox.Show(ex.Message)
Finally
connection.Close()
command.Dispose()
End Try
End Sub
AND THIS POPULATES MY LISTVIEW FROM THE DATABASE
Private Sub loadcontacts()
Dim command As MySqlCommand = Nothing
Dim listquery As String = "SELECT * FROM contacts ORDER BY id"
Dim reader As MySqlDataReader = Nothing
Try
If connection.State = ConnectionState.Closed Then
connection.Open()
End If
command = New MySqlCommand(listquery, connection)
reader = command.ExecuteReader()
command.CommandText = listquery
With ListView1
.Columns.Add("Name", 220, HorizontalAlignment.Left)
End With
While reader.Read
Dim ls As New ListViewItem(reader.Item("first_name").ToString() & " " & reader.Item("surname").ToString)
ls.SubItems.Add(reader.Item("id").ToString)
ListView1.Items.Add(ls)
End While
Catch ex As MySqlException
Finally
connection.Close()
command.Dispose()
End Try
End Sub
UPDATE
I still can't work it out, I'm cheating by including a text box and having it read the id, then i tell it to save ifs it's empty. I would prefer to do it correctly so if anyone can chime in I'd appreciate it.
