Compare Validator Incorrectly Identifying Date from Previous Year as Greater Than Date From Current Year

I have a Compare Validator on my page which is supposed to insure that the second date selected in a pair of drop down lists is greater than or equal to the first date selected.  Here's the validator:

<asp:CompareValidator CssClass="ErrorMessage" ID="CompareValidator1" runat="server" ErrorMessage="Must be later than, or equal to From date." ControlToCompare="ddIncludeFrom" ControlToValidate="ddIncludeTo" SetFocusOnError="True" Operator="GreaterThanEqual"></asp:CompareValidator>

This afternoon I discovered however that if I select a date from September 2014 in the first box and a date from February 2015 in the second, the validator incorrectly detects an error.  (See embedded screenshot.)

Any idea how to fix this?

Error screenshot
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penlandtAsked:
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mankowitzCommented:
I've been looking around to see if I can find a solution. One interesting thing is that the date comparitor only works when you use .ToShortDateString(). Is it possible to change your stored procedure to output the date in that format? (i.e. without the time, just the date)
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mankowitzCommented:
include

type="date"

in the comparevalidator. See if that helps.
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Ramkisan JagtapLead DeveloperCommented:
Yes, Including Type="Date" will solve your problem. It will work for MM/dd/YYYY format.
for other formats you need to change the Culture property of the page. e.g. for dd/mm/yyyy format change it to en-GB in the @Pagedirective of the Page as show below:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Culture = "en-GB" %>

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penlandtAuthor Commented:
Unfortunately it hasn't worked.  Here's my new Compare Validator:

<asp:CompareValidator Type="Date" CssClass="ErrorMessage" ID="CompareValidator1" runat="server" ErrorMessage="Must be later than, or equal to From date." ControlToCompare="ddIncludeFrom" ControlToValidate="ddIncludeTo" SetFocusOnError="True" Operator="GreaterThanEqual"></asp:CompareValidator>

It is still returning the same error with the same input as the original post.  :-(
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mankowitzCommented:
can you post the whole asp page?
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penlandtAuthor Commented:
Sure.  Here it is:

<%@ Page Title="Schedule Search" Language="C#" MasterPageFile="~/MasterPages/Main.master" AutoEventWireup="true" CodeFile="ScheduleSearch.aspx.cs" Inherits="Members_ScheduleSearch" %>

<asp:Content ID="Content1" ContentPlaceHolderID="cpHC" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="cpMC" Runat="Server">
    <h2><asp:Literal id="Literal1" runat="server"></asp:Literal>: Schedule Search</h2>
    <asp:UpdatePanel runat="server">
        <ContentTemplate>
            <asp:Label CssClass="C3DEFormLabel" ID="lblMemberName" runat="server" Text="Member:"></asp:Label>
            <asp:DropDownList CssClass="C3DEFormText" ID="ddMemberName" runat="server" AppendDataBoundItems="True" DataSourceID="dsMemberNames" DataTextField="Name" DataValueField="Id" AutoPostBack="true" OnSelectedIndexChanged="ddMemberName_SelectedIndexChanged">
                <asp:ListItem></asp:ListItem>
            </asp:DropDownList>
            <br />
            <asp:Label CssClass="C3DEFormLabel" ID="lblIncludeFrom" runat="server" Text="Include From:"></asp:Label>
            <asp:DropDownList CssClass="C3DEFormText" ID="ddIncludeFrom" runat="server" AppendDataBoundItems="True" DataSourceID="dsIntervalStartDates" DataTextField="IntervalStartDate" DataValueField="IntervalStartDate" OnSelectedIndexChanged="ddIncludeFrom_SelectedIndexChanged" AutoPostBack="True">
                <asp:ListItem></asp:ListItem>
            </asp:DropDownList>
            <br />
            <asp:Label CssClass="C3DEFormLabel" ID="lblIncludeTo" runat="server" Text="Include To:"></asp:Label>
            <asp:DropDownList CssClass="C3DEFormText" ID="ddIncludeTo" runat="server" AppendDataBoundItems="True" DataSourceID="dsIntervalStartDates" DataTextField="IntervalStartDate" DataValueField="IntervalStartDate" OnSelectedIndexChanged="ddIncludeTo_SelectedIndexChanged" AutoPostBack="True">
                <asp:ListItem></asp:ListItem>
            </asp:DropDownList>
            <asp:CompareValidator Type="Date" CssClass="ErrorMessage" ID="CompareValidator1" runat="server" ErrorMessage="Must be later than, or equal to From date." ControlToCompare="ddIncludeFrom" ControlToValidate="ddIncludeTo" SetFocusOnError="True" Operator="GreaterThanEqual"></asp:CompareValidator>
            <br /><br />
            <asp:Button CssClass="SubGridButton" ID="btnGroupList" runat="server" Text="Group List" OnClick="btnGroupList_Click" />
            <asp:Button CssClass="SubGridButton" ID="btnScheduleCreate" runat="server" Text="Create Schedule" OnClick="btnScheduleCreate_Click" />
            <asp:Button CssClass="SubGridButton" ID="btnSearch" runat="server" Text="Search" Enabled="false" OnClick="btnSearch_Click"/>
        </ContentTemplate>
    </asp:UpdatePanel>
    <asp:SqlDataSource ID="dsMemberNames" runat="server" ConnectionString="<%$ ConnectionStrings:dbCS %>" SelectCommand="spClientGroupMemberSortNames" SelectCommandType="StoredProcedure">
        <SelectParameters>
            <asp:SessionParameter Name="GroupID" SessionField="GroupID" Type="Int32" />
        </SelectParameters>
    </asp:SqlDataSource>
    <asp:SqlDataSource ID="dsIntervalStartDates" runat="server" ConnectionString="<%$ ConnectionStrings:dbCS %>" SelectCommand="spClientGroupScheduleStartDates" SelectCommandType="StoredProcedure">
        <SelectParameters>
            <asp:SessionParameter Name="GroupID" SessionField="GroupID" Type="Int32" />
        </SelectParameters>
    </asp:SqlDataSource>
</asp:Content>

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penlandtAuthor Commented:
This particular application requires the time as well but that's good to know (that it only works with short dates).  I'll probably have to write my own code to do the validation then.
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