SharePoint DateTime Control Validation

Ce code contrôle que la date est obligatoire et valide

                

 <asp:RequiredFieldValidator ID="RequiredFieldValidator18" runat="server" ErrorMessage="La date ouverture des plis est obligatoire."  Text="*"              ControlToValidate="dateOuverturePlisDateTimeControl$dateOuverturePlisDateTimeControlDate" ValidationGroup="group1" Display="Dynamic" ForeColor="Red" ></asp:RequiredFieldValidator>
            
<asp:CompareValidator ID="valDate" runat="server" ForeColor="Red" ControlToValidate="dateOuverturePlisDateTimeControl$dateOuverturePlisDateTimeControlDate"
                 Type="Date" Operator="DataTypeCheck" ErrorMessage="Entrez une date valide" Display="Dynamic"  ValidationGroup="group1" /> 

  <SharePoint:DateTimeControl ID="dateOuverturePlisDateTimeControl"  runat="server" Calendar="GregorianMEFrench"  />