Question

我有以下列方式，但在选择12月份标记日期错误时，12月份没有给我＃/ p>

 if (!Page.IsPostBack)
        {   DateTimeFormatInfo formatoFecha = CultureInfo.CurrentCulture.DateTimeFormat;
            TextInfo myTI = new CultureInfo("es-MX", false).TextInfo;
            for (int i = 1; i <= 12; i++)
            {
                ddlMesInicial.Items.Add(new ListItem(myTI.ToTitleCase(formatoFecha.GetMonthName(i)), i.ToString()));
                ddlMesFinal.Items.Add(new ListItem(myTI.ToTitleCase(formatoFecha.GetMonthName(i)), i.ToString()));
            }
            ddlMesInicial.SelectedValue = DateTime.Today.Month.ToString("MM");
            ddlMesFinal.SelectedValue = DateTime.Today.Month.ToString("MM");
            for (int i = 2013; i <= 2020; i++)
            { 
                ddlAñoInicial.Items.Add(new ListItem(i.ToString(), i.ToString()));
                ddlAñoFinal.Items.Add(new ListItem(i.ToString()));                    
            }
            ddlAñoInicial.SelectedValue = DateTime.Today.Year.ToString("yyyy");
            ddlAñoFinal.SelectedValue = DateTime.Today.Year.ToString("yyyy");                

            FechaEntrega.Text = string.Format("{0:yyyy-MM-dd}", DateTime.Today);

            SetFechasPeriodo();  
}

 private void SetFechasPeriodo()
    {
        DateTimeFormatInfo formatoFecha = CultureInfo.CurrentCulture.DateTimeFormat;
        TextInfo myTI = new CultureInfo("es-MX", false).TextInfo;
DateTime fechaInicial = new DateTime(Convert.ToInt32(ddlAñoInicial.SelectedValue), Convert.ToInt32(ddlMesInicial.SelectedValue), 01);
        DateTime fechaFinal = new DateTime(Convert.ToInt32(ddlAñoFinal.SelectedValue), Convert.ToInt32(ddlMesFinal.SelectedValue) +1, 01).AddDays(-1);

        string fdesde = fechaInicial.Day.ToString() + " de " + myTI.ToTitleCase(formatoFecha.GetMonthName(fechaInicial.Month)) + " de " + fechaInicial.Year.ToString();
        string fhasta = fechaFinal.Day.ToString() + " de " + myTI.ToTitleCase(formatoFecha.GetMonthName(fechaFinal.Month)) + " de " + fechaFinal.Year.ToString();

        lbFechasPeriodo.Text = "Periodo del " + fdesde + " al " + fhasta;
}

格拉西亚斯

Answer 1

如果我正确地理解了这一点，那么你真正做的就是花一个月的时间，加上1，所以它实际上是下个月。然后你从中减去一天，这样它就是上个月的最后一天。最好是给它一个实际的日期，而不是做一个圆形的方式。

替换

DateTime fechaFinal = new DateTime(Convert.ToInt32(ddlAñoFinal.SelectedValue), 
                                   Convert.ToInt32(ddlMesFinal.SelectedValue) +1, 
                                   01).AddDays(-1);

与

int añoFinal = Convert.ToInt32(ddlAñoFinal.SelectedValue);
int mesFinal = Convert.ToInt32(ddlMesFinal.SelectedValue);
int díaFinal = DateTime.DaysInMonth(añoFinal, mesFinal);
DateTime fechaFinal = new DateTime(añoFinal, mesFinal, díaFinal);

如何获得每个月的最后一天？

1 个答案: