我已将 4 个对象设置为MySettings
(Usr1, Usr2, Usr3, Usr4) 作为 System.Collections.Specialized.StringCollection
.
我以这种方式赋予它价值(并且它有效):
For x As Integer = 1 To 4
If My.Settings.Item("Usr" & x.ToString) Is Nothing Then
My.Settings.Item("Usr" & x.ToString) = New System.Collections.Specialized.StringCollection _
From {Me.TBox_Name.Text, _
Me.Tbox_Surname.Text, _
Me.TBox_City.Text, _
Me.CBox_Age.Text}
My.Settings.Save()
Saved = True
Exit For
End If
Next
当我尝试删除记录并将对象设置为空时,我无法匹配
这是我尝试过的:
Dim ToDelete = New System.Collections.Specialized.StringCollection _
From {Me.TBox_Name.Text, _
Me.Tbox_Surname.Text, _
Me.TBox_City.Text, _
Me.CBox_Age.Text}
If Not My.Settings.Usr1 Is Nothing AndAlso My.Settings.Usr1.Equals(ToDelete) Then
My.Settings.Usr1 = Nothing
End If
If Not My.Settings.Usr2 Is Nothing AndAlso My.Settings.Usr2.Equals(ToDelete) Then
My.Settings.Usr2 = Nothing
End If
If Not My.Settings.Usr3 Is Nothing AndAlso My.Settings.Usr3.Equals(ToDelete) Then
My.Settings.Usr3 = Nothing
End If
If Not My.Settings.Usr4 Is Nothing AndAlso My.Settings.Usr4.Equals(ToDelete) Then
My.Settings.Usr4 = Nothing
End If
但我从来没有找到平等:没有匹配。
我尝试从设置中获取值并将它们放入文本框中。所以我确定文本框中的值等于我的设置,但我的代码无法识别它。
我哪里错了?
还有另一种方法吗?