I am working on ASP.NET Web Forms and need your guidance with the below problem.
In the below Form View, I have two textbox that accepts dates i.e. RER Filed & Next RER Due dates. I want to add a validation criteria to the Next RER Due field that its values should always be greater than RER Filed Field.
Below is the UI of the Form:
Below is the code of the above form:
<asp:FormView ID="FormView10" runat="server">
<EditItemTemplate>
<table>
<tr>
<td>RER Filed:</td>
<td>
<asp:TextBox ID="txtRERFiled" name="txtRERFiled" runat="server" Text='<%# Bind("RERFiled", "{0:MM/dd/yy}") %>'></asp:TextBox>
<asp:MaskedEditExtender ID="meTxtRERFiled" runat="server" TargetControlID="txtRERFiled" Mask="99/99/99" MaskType="Date"></asp:MaskedEditExtender>
<asp:MaskedEditValidator ID="mevTxtRERFiled" runat="server" ValidationExpression="^[0-9]{1,2}/[0-9]{1,2}/[0-9]{2}$" ControlExtender="meTxtRERFiled" ControlToValidate="txtRERFiled" ValidationGroup="pan10" InvalidValueMessage="Enter valid date<br />e.g. mm/dd/yy" Display="None"></asp:MaskedEditValidator>
<asp:ValidatorCalloutExtender ID="vceTxtRERFiled" runat="server" TargetControlID="mevTxtRERFiled" Enabled="True"></asp:ValidatorCalloutExtender>
</td>
</tr>
<td>Next RER Due:</td>
<asp:TextBox ID="txtRERNextDue" runat="server" name="txtRERNextDue" Text='<%# Bind("RERNextDue", "{0:MM/dd/yy}") %>'></asp:TextBox>
<asp:MaskedEditExtender ID="meTxtRERNextDue" runat="server" TargetControlID="txtRERNextDue" Mask="99/99/99" MaskType="Date"></asp:MaskedEditExtender>
<asp:MaskedEditValidator ID="mevTxtRERNextDue" runat="server" ValidationExpression="^[0-9]{1,2}/[0-9]{1,2}/[0-9]{2}$" ControlExtender="meTxtRERNextDue" ControlToValidate="txtRERNextDue" ValidationGroup="pan10" InvalidValueMessage="Enter valid date<br />e.g. mm/dd/yy" Display="None"></asp:MaskedEditValidator>
<asp:ValidatorCalloutExtender ID="vceTxtRERNextDue" runat="server" TargetControlID="mevTxtRERNextDue" Enabled="True"></asp:ValidatorCalloutExtender>
</EditItemTemplate>
</asp:FormView>