DateTimePicker 不显示数据，即使我点击了要显示的日期

Question

我的 WinForm 上有一个启用了 CheckBox 属性的 DateTimePicker 控件。在运行时，当我想要 select 一个日期时，它没有在 datetimepicker 文本框中显示它，我知道我的代码是正确的，因为相同的代码在我拥有的另一种形式上工作，但在这个形式中没有！

下面是我的代码的快照，如有任何帮助，我们将不胜感激：

Private Sub btnInsert_Click(sender As Object, e As EventArgs) Handles btnInsert.Click
DateTimePicker1.Enabled = True
DateTimerPicker1.Checked = False
If DateTimePicker1.Checked = False Then
        DateTimePicker1.CustomFormat = " "
        DateTimePicker1.Format = DateTimePickerFormat.Custom
    Else
        DateTimePicker1.Format = DateTimePickerFormat.Short
    End If
End Sub

Answer 1

要处理该复选框的更改，您可以使用 ValueChanged 事件：

Private Sub DateTimePicker1_ValueChanged(sender As Object, e As EventArgs) _
    Handles DateTimePicker1.ValueChanged

    If Me.DateTimePicker1.Checked=True Then
       Me.DateTimePicker1.Format = DateTimePickerFormat.Short
    Else
       Me.DateTimePicker1.Format = DateTimePickerFormat.Custom
       Me.DateTimePicker1.CustomFormat = " "
     End If
End Sub

在您的代码中，您告诉它不要使用 DateTimePicker1.CustomFormat = " " 显示日期。

在下面查看我添加到您的代码中的注释：

DateTimerPicker1.Checked = False '<==== You set Checked to false
If DateTimePicker1.Checked = False Then  '<==== You told if not checked (it's not checked)
    DateTimePicker1.CustomFormat = " "  '<==== Show space
    DateTimePicker1.Format = DateTimePickerFormat.Custom
....

DateTimePicker 不显示数据，即使我点击了要显示的日期

DateTimePicker does not displaying data even after I clicked a date to display

.net

vb.net

datetimepicker

winforms