从Datetimepicker中仅选择月份和年份 [英] select only month and year from Datetimepicker

问题描述

如何从vb.net中的datetimepicker中仅选择月份和年份

推荐答案

日期选择器返回 DateTime 具有月和年属性的对象。

Date pickers return a DateTime object which has Month and Year properties.

使用格式属性。

Use Format property.

dateTimePicker1.Format = DateTimePickerFormat.Custom
dateTimePicker1.CustomFormat = "MMMM yyyy" 'or whatever you want

参考： http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.format.aspx [< a href =http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.format.aspxtarget =_ blanktitle =New Window> ^ ]

解决方案2和3将崩溃OutOfBounds如果Value的日期大于Next / Previous月份的天数且用户使用箭头按钮更改月份，则为例外。例如，当值为10/31/2014并且控件显示2014年10月时。当​​您将月更改为9月时，值将设置为9/31/2014，这是无效日期并导致异常。



解决方法是

Solution 2 and 3 will crash with an OutOfBounds Exception if the Value has a date which is greater than the number of days in the Next/Previous month and the user changes month using the arrow buttons. For Example when the Value is 10/31/2014 and the control displays October, 2014. When you change the Month to September the Value is set to 9/31/2014 which is an invalid date and causes an exception.

A workaround is

Private Sub SalesDatePicker_ValueChanged(sender As Object, e As EventArgs) Handles SalesDatePicker.ValueChanged
    If SalesDatePicker.Value.Day <> 1 Then
        SalesDatePicker.Value = DateSerial(SalesDatePicker.Value.Year, SalesDatePicker.Value.Month, 1)
    End If
End Sub

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