根据 GroupBox 的 CheckBoxes 设置 CheckBox Checked

Question

早安 我想问一些与复选框相关的问题 我必须一组复选框，它看起来像这样

我的问题是，当我选中 Purchase Requisition 组中的任何复选框时，我如何才能选中复选框 Purchase Requisition，如果所有这些复选框都未选中，则复选框 Purchase Requisition 未选中。

我有这个代码，我把这个代码放在 Groupbox Purchase Requisition 内的所有复选框上

  Sub check_Purchase_Req()
        Dim oCtl As Control
        Dim iX As Integer

        For Each oCtl In GroupBox3.Controls
            If TypeName(oCtl) = "CheckBox" And oCtl.Enabled = True Then iX = iX + 1

            If iX > 0 Then
                CheckBox1.Checked = True

            ElseIf CheckBox19.Checked = False And CheckBox20.Checked = False And CheckBox21.Checked = False And CheckBox22.Checked = False And CheckBox23.Checked = False Then

                CheckBox1.Checked = False
                Exit For
            End If
        Next
    End Sub

但是这段代码不符合我的需要

感谢TYSM的任何帮助

Answer 1

这里，Checkbox1 到 Checkbox5 是Purchase Requisition 组框内的复选框的假定名称。

chkPurchaseRequisition 也是您的采购申请复选框的复选框

试试这个：

 Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles _
CheckBox1.CheckedChanged, CheckBox2.CheckedChanged, CheckBox3.CheckedChanged, CheckBox4.CheckedChanged, CheckBox5.CheckedChanged
    If sender.Checked = True Then
        chkPurchaseRequisition.Checked = True
    Else
        Dim AllUnchecked As Boolean = True
        For Each c As Control In grpboxPurchaseRequisition.Controls.OfType(Of CheckBox)()
            If DirectCast(c, CheckBox).Checked = True Then
                AllUnchecked = False
                Exit For
            End If
        Next
        If AllUnchecked = True Then
            chkPurchaseRequisition.Checked = False
        End If
    End If

End Sub

Answer 2

将 linq 用于此类任务使生活更轻松：

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    GroupBox1.Controls.OfType(Of CheckBox).ToList() _
             .ForEach(Sub(c) AddHandler c.CheckedChanged, AddressOf CheckChanged)
End Sub
Private Sub CheckChanged(sender As Object, e As EventArgs)
    CheckBox1.Checked = GroupBox1.Controls.OfType(Of CheckBox).Any(Function(c) c.Checked)
End Sub

在上面的代码中，我认为GroupBox1 是正确的，CheckBox1 是您要根据CheckBox 的GroupBox1 控件来选中或取消选中的那个。