.Net passing bad formatted value to stored procedure

Hi, that's the problem:

I have a GridView, bound to a SQLDataSource, with an stored procedure as a Select query. The Select Parameters are bound to controls in the web form, acting like some filter fields.

When I submit the page, everythings works fine, except when I try to set some value in the DateTime fields. .Net is enclosing the date with extra single quotes, as I could see in the Profiler:

exec sel_despesa_procura @.codigo=NULL,@.fornecedor=NULL,@.descricao=NULL,@.vencto_ini=''2005-10-10 00:00:00:000'',@.vencto_fim=''2005-10-20
00:00:00:000'',@.pagto_ini=NULL,@.pagto_fim=NULL,@.valor=NULL,@.valor_pago=NULL,
@.centro_custo=NULL,@.pago=N'0,1'

The fields are defined as follows:

<SelectParameters>
...
<asp:ControlParameterControlID="txtFiltroVencIni"Name="vencto_ini"PropertyName="Text"Type="DateTime"/>
<asp:ControlParameterControlID="txtFiltroVencFim"Name="vencto_fim"PropertyName="Text"Type="DateTime"/>
...
</SelectParameters>

The stored procedure doesn't even execute, due to the bad formatted arguments. It returns the error:

Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '2005'.

I'm going to change the parameter type to varchar, as a workaround, but I'd like to solve this problem.

Thanks in advance,

Anderson

That is not it's normal behavior. Just for laughs, set the pages culture and uiculture to "en-US", and run the page again and see if the problem disappears. If it does, then it's a bug with your particular culture settings.