ASP.NET Stop单击按钮时重新加载整个页面？

Question

因此，当我单击“选择”按钮时，将显示日历，我可以选择日期，然后在选择日期后消失。问题是每次我点击按钮都会重新加载整个页面，有什么方法可以阻止它吗？

我是ASP.NET的新手吗？以下是事件的设计代码和实际代码：

        <tr>
<td>
    Expired Date
</td>
            <td>

                <asp:TextBox ID="txtExpDate" runat="server"></asp:TextBox>

&nbsp;<asp:Button ID="btnSelectDate" runat="server" OnClick="btnSelectDate_Click" Text="Select" />
&nbsp;<asp:Button ID="btnClearDate" runat="server" OnClick="btnClearDate_Click" Text="Clear" />
            </td><td></td>

        </tr>
        <tr>
<td>
    &nbsp;</td>
            <td>
                <asp:Calendar ID="calExpiredDate" runat="server" BackColor="White" BorderColor="#3366CC" BorderWidth="1px" CellPadding="1" DayNameFormat="Shortest" Font-Names="Verdana" Font-Size="8pt" ForeColor="#003399" Height="200px" Visible="False" Width="220px" OnSelectionChanged="calExpiredDate_SelectionChanged">
                    <DayHeaderStyle BackColor="#99CCCC" ForeColor="#336666" Height="1px" />
                    <NextPrevStyle Font-Size="8pt" ForeColor="#CCCCFF" />
                    <OtherMonthDayStyle ForeColor="#999999" />
                    <SelectedDayStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
                    <SelectorStyle BackColor="#99CCCC" ForeColor="#336666" />
                    <TitleStyle BackColor="#003399" BorderColor="#3366CC" BorderWidth="1px" Font-Bold="True" Font-Size="10pt" ForeColor="#CCCCFF" Height="25px" />
                    <TodayDayStyle BackColor="#99CCCC" ForeColor="White" />
                    <WeekendDayStyle BackColor="#CCCCFF" />
                </asp:Calendar>
                <br />
            </td><td>
                &nbsp;</td>
        </tr>

---

protected void btnSelectDate_Click(object sender, EventArgs e)
        {
            if (calExpiredDate.Visible == false) calExpiredDate.Visible = true;
            else calExpiredDate.Visible = false;
        }

        protected void btnClearDate_Click(object sender, EventArgs e)
        {
            txtExpDate.Text = null;
        }


        protected void calExpiredDate_SelectionChanged(object sender, EventArgs e)
        {
            txtExpDate.Text = calExpiredDate.SelectedDate.ToShortDateString();
            calExpiredDate.Visible = false;
        }

Answer 1

最快的解决方案是将所有内容包装在<asp:UpdatePanel>：

中

<asp:UpdatePanel>
    <ContentTemplate>
        your content, buttons, html, etc
    </ContentTemplate
</asp:UpdatePanel>

它会阻止页面闪烁。

Answer 2

按照Garrison Neely的建议，然后对于那些你不想验证的文本框，将'CausesValidation'属性设置为'False'。