Question

Alright, I’ve got a RangeValidator:

<asp:RangeValidator ID="DateRangeValidator" runat="server" ControlToValidate="DateRange"
    ErrorMessage="The date range must be at least 1 day, not more than 30, and neither date can be greater than today's date."
    EnableClientScript="true" MinimumValue="1" MaximumValue="30" CssClass="errortext span9 offset2"
    Display="Dynamic" />

And as you can see the minimum is 1 and the maximum is 30.

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That is validating a hidden field (it’s visible at the moment cause I’m testing):

<asp:TextBox ID="DateRange" runat="server" ClientIDMode="Static" />

And as you can see I’ve set the client ID to be static so it’s finding the control just fine.

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That hidden field is populated by this JavaScript method when one of the two dates change:

$('.datepicker').change(function () {
    var startDate = new Date($('#StartDate').val());
    var endDate = new Date($('#EndDate').val());

    if (startDate > Date() || endDate > Date()) {
        $('#DateRange').val(-1);
    }
    else {
        var nDifference = endDate - startDate;
        var one_day = 1000 * 60 * 60 * 24;
        $('#DateRange').val(Math.round(nDifference / one_day) + 1);
    }

    Page_ClientValidate(null);
});

And this method is working perfectly from the perspective of setting the correct number of days difference.

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When the Page_ClientValidate is called I’ve debugged it to ensure the validator is firing as expected, and it is, and it has the values I would expect. When the minimum is checked it’s grabbing 1 … and when that is compared to a value of 8 … it’s evaluating as expected … 8 is greater than or equal to 1.

However, when the maximum is checked, even though it’s grabbing 30 for the maximum … when it’s compared to a value of 8 … the expression that says 8 is less than or equal to 30 is being evaluated to false.

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I really hope somebody can help me out here!

How in the world is 8 not less than 30 here?

Answer 1

You’re missing a Type="Integer" on your RangeValidator.