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Date validation in ASP.NET 2.0

What is the best way to validate a date in ASP.NET 2.0? I have a TextBox control and want the date to be entered as yyyy/mm/dd and check that it is a valid date. I have been trying to use the AJAX MaskedEditExtender and MaskedEditValidator, but can't get this to work.

<asp:TextBox ID="tbDate" runat="server" />
<cc1:MaskedEditExtender ID="meeDate" runat="server" TargetControlID="tbDate" Mask="9999/99/99" MaskType="Date" CultureName="en:za" />
<cc1:MaskedEditValidator ID="mevDate" runat="server" ControlToValidate="tbDate" ControlExtender="meeDate" Text="Invalid date" Display="Dynamic"></cc1:MaskedEditValidator>

can anyone help or suggest a better method?

ASKER CERTIFIED SOLUTION

Dirk Haest

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Zvonko

Extend it to this:
<asp:TextBox ID="tbDate" runat="server" />
<cc1:MaskedEditExtender ID="meeDate" runat="server" TargetControlID="tbDate" Mask="9999/99/99" MaskType="Date" CultureName="en:za" />
<cc1:MaskedEditValidator ID="mevDate" runat="server" ControlToValidate="tbDate" ControlExtender="meeDate" ClientValidationFunction="checkDate"
Text="Invalid date" Display="Dynamic"></cc1:MaskedEditValidator>

And add this function:
<script type="text/javascript">
function checkDate(source, clientside_arguments){
var checkDate = new Date(clientside_arguments.Value );
clientside_arguments.IsValid=true;
var dPart = clientside_arguments.Value.split("/");
if(dPart[0]!=checkDate.getFullYear() ||
dPart[1]!=checkDate.getMonth()+1 ||
dPart[2]!=checkDate.getDate()){
clientside_arguments.IsValid=false;
}
}
</script>

DerekWatling

ASKER

The MaskedEditExtender/Validator were doing too many strange things. Have ended up writing my own JavaScript onfocus and onblur functions that do what I want.

Zvonko

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