required field validator should fire only when checkbox is checked and fields are blank

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scenario

1)two calendar control[fromdate and todate]...both are disabled at start
2)checkbox
3)save button


--if i click the check box...the disabled calendar control becomes enabled...then we enter from and todate
--then if i save it should update


--<<<<<<<<<what i="" require="">>.

if i dont click the check box[that is both fromdate and todate are disabled and are left blank]. and then save it should save.

--problem

if i dont click the check box and when i am trying to save..both the calendar control required field validator message is firing..enter valid value in the fields

--i want these message to be displayed[on save button click] only when check box is clicked..and calendar control [both from and to date] is left blank.

----------------------aspx code-----------------------------------------------

<tr>
                    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                        <ContentTemplate>
                            <td align="left" class="style2" colspan="4">
                                <asp:CheckBox ID="chkroleid" runat="server" Text="Assign Role For Particular Duration"
                                    OnCheckedChanged="chkroleid_CheckedChanged" Checked="false" AutoPostBack="true" />
                            </td>
                        </ContentTemplate>
                    </asp:UpdatePanel>
                </tr>
                <tr id="FirstRow" runat="server">

                    <td class="lavel">
                        <asp:Label ID="ll_Appointment_Date" runat="server" Text="From Date"></asp:Label>
                    </td>
                    <td width="25%">
                        <uc3:CalendarControl ID="txt_Appointment_From_Date"  runat="server" ShowTime="true"
                            SetEnabled="false"/>
                    </td>
                    <td class="label" width="10%">
                        <asp:Label ID="Label2" runat="server" Text="To Date"></asp:Label>
                    </td>
                    <td width="25%">
                        <uc3:CalendarControl ID="txt_Appointment_To_Date" runat="server" ShowTime="true"
                            SetEnabled="false" />
                    </td>
                </tr>

--custom button panel is having save button--

<uc1:CustomButtonPanel ID="CustomButtonPanel1" align="right" runat="server" />
       <asp:ValidationSummary ID="ValidationSummary1" runat="server" HeaderText="You must enter a valid value in the following field(s):"
           ShowMessageBox="True" ShowSummary="False" />

---------------------------------------------------------------------------------------
so how to solve this?


Brij-

I m little confused. Can you help me ?

--in user control.ascx i have this

<asp:RequiredFieldValidator ID="Date_rfv" runat="server" SetFocusOnError="true" ControlToValidate="txtCalendarValue"
Display="Dynamic">

-- in usercontrol.ascx.cs

public void SetDateValidators()
{
if (this.RfvDateErrorMsg.Trim().Length > 0)
{
Date_rfv.ErrorMessage = this.RfvDateErrorMsg.ToString();
}
else
{
Date_rfv.ErrorMessage = System.Configuration.ConfigurationSettings.AppSettings["Date_rfv"];
}
}

--in web config the message is declared [enter valid date]
<add key="Date_rfv" value="Enter required date value.">

--------------------------------------------
so when checkbox is not checked.
then the validation below fires
and the the webconfig key message

--custom button panel is having save button--
<pre lang="xml">&lt;uc1:CustomButtonPanel ID=&quot;CustomButtonPanel1&quot; align=&quot;right&quot; runat=&quot;server&quot; /&gt;
       &lt;asp:ValidationSummary ID=&quot;ValidationSummary1&quot; runat=&quot;server&quot; HeaderText=&quot;You must enter a valid value in the following field(s):&quot;
           ShowMessageBox=&quot;True&quot; ShowSummary=&quot;False&quot; /&gt;</pre>

i get error like below

You must enter a valid value in the following field
Enter required date value
Enter required date value

--after reading your article i tried to do

i am trying to do validation on client side..


<asp:CheckBox ID="chkroleid" runat="server" Text="Assign Role For Particular Duration"
OnCheckedChanged="chkroleid_CheckedChanged" Checked="false" Onclick="clientValidation_Calendarcontrol();" AutoPostBack="true" />

function clientValidation_Calendarcontrol(source, arguments)
  {

  if (chkroleid.checked)
  {


  }

  else
  {
  var ValidationSummary1 = document.getElementById('ValidationSummary1');
  ValidatorEnable(ValidationSummary1, false);
  ValidationSummaryOnSubmit();
  }


  }

--but this is not working,,,
how to disable the validation summary [You must enter a valid value in the following field]

and the part that is declared in usercontrol which is linked with webconfig[Enter required date value]


--kindly help