How Can I Change The Format Of A Date Returned From Asp:calendar

Hello!

I have a table in an SQL database, in which I have a field in datetime format. 

In my aspx page I would like to get the date the user chooses from an asp: calendar I have and submit it to the DB.

I already have all the code ready, the datasource, the gridview, all other fields to submit, and I just added a template field with the asp:calendar so that the user could choose a date.

I´m getting this error when I run the page: "Conversion from type 'Date' to type 'Boolean' is not valid."

 It seems to be a problem about the date that is given by the Calendar object (?) and the one I should submit to my DB.

Here´s the part of the code where I have my standard Calendar binded to the correspondant field:                        <asp:Calendar ID="Calendar1" runat="server" SelectedDate='<%# Bind("data") %>' Visible='<%# Eval("data") %>'>
                        </asp:Calendar>

I´m gessing I should probably change the format of the date somehow before submit it to the DB, but how?

Thank you all,

 

RR