检查是否在VB6中添加/删除对象

时间:2020-01-09 13:29:09

标签: button combobox vb6 controls

我有一个查询,我有这个界面:

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ComboBox位于UserControl内,按ComboBox的Add this UserControl按钮可将UserControl / ComboBox添加到PictureBox中:

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我想要的是,例如,当用户选择两个ComboBox的值并按下按钮时,将这些选择的值添加到PictureBox(下面)中,然后将其添加到PictureBox中。清理UserControl。我留下我说的话,假设用户选择了组合的值:

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选择它们后,“添加这些”按钮将被启用,它们将在下面传递,而上面的将被清除:

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但是,如果我按下“删除”按钮,则必须删除最后一个加载的对象并移至顶部。我留下一个描述性图片,请按“删除”按钮:

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底部消失并上升:

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当前,这是我用来添加的代码:

Option Explicit
Dim indice As Integer

Public Property Let AddType(ByVal Value As String)
   cmbAddExample.Text = Value
End Property

Private Sub btnAñadir_Click()
   indice = indice + 1

   Picture1.Visible = True

   Load uc1(indice)
   Set uc1(indice).Container = Picture1
   uc1(indice).Visible = True
   uc1(indice).Top = IIf(indice = 1, 0, uc1(indice - 1).Top + uc1(indice - 1).Height + 20)

   Load cmbAddExample(indice)
   Set cmbAddExample(indice).Container = uc1(indice)
   cmbAddExample(indice).Visible = True
   cmbAddExample(indice).Top = cmbAddExample(indice - 1).Top
   CargaIDTipoNumero

   uc1(indice).AddType = uc1(0).AddType
   uc1(indice).AddType = ""


   If indice = 3 Then
   Me.btnAñadir.Enabled = False
   End If
End Sub

那么,有没有人知道我该怎么做?还是可以的?

按钮删除:

Private Sub btnQuitar_Click()
   indice = cmbAddExample().Count - 1
   If indice > 0 Then
       Unload cmbAddExample(indice)
       End If
End Sub

1 个答案:

答案 0 :(得分:1)

使用this answer作为起点,您可以轻松实现这些要求。我已经从其他答案中复制了相关代码并对其进行了修改:

Private Sub btnAdd_Click()
   index = index + 1

   Load uc1(index)
   Set uc1(index).Container = Picture1
   uc1(index).Visible = True
   uc1(index).Top = IIf(index = 1, 0, uc1(index - 1).Top + uc1(index - 1).Height + 20)

   'copy the information down
   uc1(index).AddType = uc1(0).AddType
   uc1(0).AddType = ""

   Picture1.Visible = True
End Sub

Private Sub btnRemove_Click()
   If index = 0 Then Exit Sub

   'copy the information back up and remove the control
   uc1(0).AddType = uc1(index).AddType
   Unload uc1(index)

   index = index - 1
   If index = 0 Then Picture1.Visible = False
End Sub

我只编写了一个控件的代码来说明这个概念。您可以根据需要添加其他控件。