i am throwing a exception error:
Specified cast is not valid.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Specified cast is not valid.
this is my code..
<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">
<form id="Form1" runat="server">
<div style="text-align: center">
<div class="eventmonth">
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Homework1ConnectionString2 %>"
SelectCommand="SELECT [ID], [starttime], [title], [description] FROM [Events]" ProviderName="<%$ ConnectionStrings:Homework1ConnectionString2.Provi derName %>"></asp:SqlDataSource>
<ec:EventCalendar runat="server" ID="eventscalendar" DataSourceID="SqlDataSource1"
BorderWidth="2px" DayField="starttime" CssClass="eventmonthtable" DayNameFormat="Full" BackColor="#C0C0FF" BorderColor="#8080FF" BorderStyle="Groove" Font-Size="1em">
<DayStyle CssClass="calcurrentmonth" BackColor="White" BorderColor="#8080FF" BorderStyle="Ridge" BorderWidth="1px" ForeColor="Navy" />
<DayHeaderStyle CssClass="caldays" BackColor="#8080FF" BorderColor="#E0E0E0" BorderStyle="Groove" />
<WeekendDayStyle CssClass="calweekend" />
<OtherMonthDayStyle CssClass="calothermonth" />
<DayEventTemplate>
<div style="padding: 3px;">
<asp:HyperLink ID="HyperLink1" runat="server" Text='<%#Eval("title") %>' NavigateUrl='<%# "events.aspx?Eventid=" &Cstr( Eval("ID"))%>'
ToolTip='<%#CStr(Eval("description")) %>' /></div>
</DayEventTemplate>
<HeaderTemplate>
<table width="100%">
<tr align="center">
<td>
<asp:LinkButton ID="PrevMonth" runat="server" Text='<%# "« " & Container.PrevMonth.ToString("MMMM yyyy") %>'
CommandName="PrevMonth" />
</td>
<td>
<h3>
<asp:Label ID="label2" runat="server" Text='<%# Container.CurrentMonth.ToString("MMMM yyyy") %>' /></h3>
</td>
<td>
<asp:LinkButton ID="NextMonth" runat="server" Text='<%# Container.NextMonth.ToString("MMMM yyyy") & " »" %>'
CommandName="NextMonth" />
</td>
</tr>
</table>
</HeaderTemplate>
<TodayDayStyle CssClass="calcurrentday" />
<DayNumberStyle CssClass="dayNumber" />
</ec:EventCalendar>
</div>
</div>
</form>
</asp:Content>