C# 日历之间的冲突

我有两个这样的日期选择器：

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>

---

问题是当我在第二个日历中选择日期时，它会正确地更改它，但会将第一个日历日期刷新回今天，我该如何解决这个问题？关于您需要将文本框的初始设置包装在

IsPostBack

复选框中。如果没有，则每次回发时都会重置它们

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);
    }
}

---

页面发回时将触发页面加载事件。尝试将语句包装在if语句中，使其仅在页面加载时执行

if (!IsPostBack)
   {
      fecha_fin.Text = Calendar1.SelectedDate.ToString("dd/MM/yyyy");
      fecha_ini.Text = Calendar2.SelectedDate.ToString("dd/MM/yyyy"); 

    }

if (!IsPostBack)
   {
      fecha_fin.Text = Calendar1.SelectedDate.ToString("dd/MM/yyyy");
      fecha_ini.Text = Calendar2.SelectedDate.ToString("dd/MM/yyyy"); 

    }