硼砂是干什么用的

Question

I have two dates pickers like this:

Html:

      <asp:TextBox ID="fecha_ini" ClientIDMode="Static" runat="server"></asp:TextBox>
        <asp:Calendar ID="Calendar2" runat="server" OnSelectionChanged="DateChange" DayNameFormat="FirstLetter" Font-Names="Tahoma" Font-Size="11px" NextMonthText="." PrevMonthText="." SelectMonthText="?" SelectWeekText="?" CssClass="myCalendar" CellPadding="0">
            <OtherMonthDayStyle ForeColor="#b0b0b0" />
            <DayStyle CssClass="myCalendarDay" ForeColor="#2d3338" />
            <DayHeaderStyle CssClass="myCalendarDayHeader" ForeColor="#2d3338" />
            <SelectedDayStyle Font-Bold="True" Font-Size="12px" CssClass="myCalendarSelector" />
            <TodayDayStyle CssClass="myCalendarToday" />
            <SelectorStyle CssClass="myCalendarSelector" />
            <NextPrevStyle CssClass="myCalendarNextPrev" />
            <TitleStyle CssClass="myCalendarTitle" />
        </asp:Calendar>
    </td>
 <td>
                <asp:TextBox ID="fecha_fin" ClientIDMode="Static" runat="server"></asp:TextBox>
                <asp:Calendar ID="Calendar1" runat="server" OnSelectionChanged="DateChange" DayNameFormat="FirstLetter" Font-Names="Tahoma" Font-Size="11px" NextMonthText="." PrevMonthText="." SelectMonthText="?" SelectWeekText="?" CssClass="myCalendar" CellPadding="0">
                    <OtherMonthDayStyle ForeColor="#b0b0b0" />
                    <DayStyle CssClass="myCalendarDay" ForeColor="#2d3338" />
                    <DayHeaderStyle CssClass="myCalendarDayHeader" ForeColor="#2d3338" />
                    <SelectedDayStyle Font-Bold="True" Font-Size="12px" CssClass="myCalendarSelector" />
                    <TodayDayStyle CssClass="myCalendarToday" />
                    <SelectorStyle CssClass="myCalendarSelector" />
                    <NextPrevStyle CssClass="myCalendarNextPrev" />
                    <TitleStyle CssClass="myCalendarTitle" />
                </asp:Calendar>

            </td>

.CS controller

 protected void Page_Load(object sender, EventArgs e)
     {
 fecha_ini.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
 fecha_fin.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
                    Thread.CurrentThread.CurrentCulture = new CultureInfo("es-MX");
     }

 protected void DateChange(object sender, EventArgs e)
        {
            fecha_fin.Text = Calendar1.SelectedDate.ToString("dd/MM/yyyy");
            fecha_ini.Text = Calendar2.SelectedDate.ToString("dd/MM/yyyy");

        }

Problem is when I pick date in second calendar, it changes it correctly but refresh first calendar date back to Today, how can I solve that? Regards

Answer 1

You need to wrap the initial setting of the TextBoxes inside an IsPostBack check. If not they will be reset every time there is a Postback.

protected void Page_Load(object sender, EventArgs e)
{
    Thread.CurrentThread.CurrentCulture = new CultureInfo("es-MX");

    if (!IsPostBack)
    {
        fecha_ini.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
        fecha_fin.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
    }
}

Answer 2

Your page load event is being triggered when the page posts back. Try wrapping your statement in an if statement so that it only executes when the page loads.

if (!IsPostBack)
   {
      fecha_ini.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
      fecha_fin.Text = DateTime.Today.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
      Thread.CurrentThread.CurrentCulture = new CultureInfo("es-MX");
    }