[英]How can I check whether dynamically-created Checkboxes are checked (VB.NET)?
我開始循環遍歷動態創建的復選框:
For Each cntrl As Control In Me.Controls
If TypeOf cntrl Is CheckBox Then
If (cntrl As CheckBox).Checked Then
'Do Something
End If
End If
Next
...但是我不知道我需要什么,而不是這條線:
If (cntrl As CheckBox).Checked Then
...這只是猜測,無法編譯。
使用LInQ可以節省一些代碼行:
Sub Test()
Dim myList as New List(Of CheckBox)
For Each cbox As CheckBox In Me.Controls.OfType(Of CheckBox).Where(Function(cb) cb.Checked)
myList.Add(cbox)
Next
Msgbox(String.Format("{0} checkboxes were checked!", myList.Count))
End Sub
我認為您想做的是:
If DirectCast(cntrl, CheckBox).Checked = True Then
我會這樣做:
Dim con As Checkbox
For Each con In Me.Controls
If con.Checked = True
'Do Something
End If
Next
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