我有一个令我困惑的简单问题。因为我已经离开一段时间了,所以我需要用 VB 重新振作一下。我有一个添加新联系人的表单。通过按适当的按钮添加新联系人,它们会在表单的列表中显示为条目。我现在尝试添加一个编辑按钮来编辑现有条目。用户将在列表中选择一个给定条目并按下编辑按钮,然后将显示一个适当的表单 (AddContFrm)。现在它只是添加了另一个具有相同标题的条目。逻辑在一个名为 Contact.vb 的类中处理这是我的代码。
Public Class Contact
Public Contact As String
Public Title As String
Public Fname As String
Public Surname As String
Public Address As String
Private myCont As String
Public Property Cont()
Get
Return myCont
End Get
Set(ByVal value)
myCont = Value
End Set
End Property
Public Overrides Function ToString() As String
Return Me.Cont
End Function
Sub NewContact()
FName = frmAddCont.txtFName.ToString
frmStart.lstContact.Items.Add(FName)
frmAddCont.Hide()
End Sub
Public Sub Display()
Dim C As New Contact
'C.Cont = InputBox("Enter a title for this contact.")
C.Cont = frmAddCont.txtTitle.Text
C.Fname = frmAddCont.txtFName.Text
C.Surname = frmAddCont.txtSName.Text
C.Address = frmAddCont.txtAddress.Text
'frmStart.lstContact.Items.Add(C.Cont.ToString)
frmStart.lstContact.Items.Add(C)
End Sub
End Class
添加ContFrm
Public Class frmAddCont
Public Class ControlObject
Dim Title As String
Dim FName As String
Dim SName As String
Dim Address As String
Dim TelephoneNumber As Integer
Dim emailAddress As String
Dim Website As String
Dim Photograph As String
End Class
Private Sub btnConfirmAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConfirmAdd.Click
Dim C As New Contact
C.Display()
Me.Hide()
End Sub
Private Sub frmAddCont_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class
和 frmStart.vb
Public Class frmStart
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
frmAddCont.Show()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDel.Click
Dim DelCont As Contact
DelCont = Me.lstContact.SelectedItem()
lstContact.Items.Remove(DelCont)
End Sub
Private Sub lstContact_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstContact.SelectedIndexChanged
End Sub
Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click
Dim C As Contact
If lstContact.SelectedItem IsNot Nothing Then
C = DirectCast(lstContact.SelectedItem, Contact)
C.Display()
End If
End Sub
End Class