如何在文本框中显示上个月的上一个日期 [英] How to show previous month last date in Text box

问题描述

亲爱的专家！

我使用一个文本框作为回溯日期。并使用一个dateTimepicker。如果我想从datetimepicker1中选择任何日期，则文本框日期值应该是上个月的最后一个日期，如30s或31st（30-01-2014或31-01-2014）。怎么做。请帮助我。





提前致谢和问候

Sreeni ....

Dear Experts!
I am using one Text Box for back date purpose. And using one dateTimepicker. if I want pick the any date from datetimepicker1, the text box date value should be previous month last date like 30s or 31st (30-01-2014 or 31-01-2014). how to do it. kindly help me.


Advance Thanks & Regards
Sreeni....

推荐答案

DateTime value = new DateTime（DateTime.Now.Year，DateTime.Now.Month，1）.AddDays（-1）;

DateTime value = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddDays(-1);

private void YourDateTimePicker_ValueChanged(object sender, EventArgs e)
{
    DateTime val = YourDateTimePicker.Value;

    int pYear = val.Year;
    int pMonth = val.Month - 1;

    if (pMonth == 0)
    {
        pMonth = 12;
        pYear--;         
    }

    DateTime lastDayPrevMonth = new DateTime(pYear, pMonth, DateTime.DaysInMonth(pYear, pMonth));

    YourTextBox.Text = lastDayPrevMonth.ToString("dd-MM-yyyy");
}

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