RequiredFieldValidator only works for one validation - asp.net

Question

I have a web application written in VS2010.
I have a GridView in which I want to add 2 different validations to a field in edit mode. One validation is that it is a required field. The other validation is a max. length of 80 characters.
Below is my HTML:
<asp:GridView ID="UserInfoGridView" runat="server" AutoGenerateColumns="False"
Caption="User Information" CaptionAlign="Top" CssClass="grid" HorizontalAlign="Left"
PageSize="1" Width="400px" ShowHeaderWhenEmpty="true" Height="60px"
OnRowCancelingEdit="UserInfoGridView_RowCancelingEdit"
OnRowEditing="UserInfoGridView_RowEditing"
OnRowUpdating="UserInfoGridView_RowUpdating">
<Columns>
<asp:TemplateField HeaderText="Name" ItemStyle-Wrap="false">
<EditItemTemplate>
<asp:TextBox ID="uigvTxtBoxName" runat="server" Text='<%# Bind("UserName") %>'></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldEditName" ControlToValidate="uigvTxtBoxName" runat="server"
ErrorMessage="Required field." ValidationGroup="EditUserNameValidation" Display="Dynamic"
CssClass="message-error">
</asp:RequiredFieldValidator>
<asp:RequiredFieldValidator ID="MaxValEditName" ControlToValidate="uigvTxtBoxName" runat="server"
ErrorMessage="Maximum length is 80." ValidationGroup="EditUserNameValidation" Display="Dynamic"
CssClass="message-error" ValidationExpression="^.{1,80}$">
</asp:RequiredFieldValidator>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="uigvLblName" runat="server" Text='<%# Bind("UserName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Email Address" ItemStyle-Wrap="false">
<EditItemTemplate>
<asp:TextBox ID="uigvTxtBoxEmail" runat="server" Text='<%# Bind("UserEmail") %>'></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldEditEmail" ControlToValidate="uigvTxtBoxEmail" runat="server"
ErrorMessage="Required field." ValidationGroup="EditUserEmailValidation" Display="Dynamic" CssClass="message-error">
</asp:RequiredFieldValidator>
<asp:RequiredFieldValidator ID="MaxValEditEmail" ControlToValidate="uigvTxtBoxEmail" runat="server"
ErrorMessage="Maximumn length is 80." ValidationGroup="EditUserEmailValidation" Display="Dynamic" CssClass="message-error"
ValidationExpression="^.{1,80}$" >
</asp:RequiredFieldValidator>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="uigvLblEmail" runat="server" Text='<%# Bind("UserEmail") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Action" ShowHeader="False" ItemStyle-Wrap="false" ItemStyle-HorizontalAlign="Center">
<EditItemTemplate>
<asp:Button ID="uigvUpdateButton" runat="server" CausesValidation="True" CommandName="Update"
Text="Update" CssClass="gridActionbutton"></asp:Button>
<asp:Button ID="uigvCancelButton" runat="server" CausesValidation="False" CommandName="Cancel"
Text="Cancel" CssClass="gridActionbutton"></asp:Button>
</EditItemTemplate>
<ItemTemplate>
<asp:Button ID="uigvEditButton" runat="server" CausesValidation="False" CommandName="Edit"
Text="Edit" CssClass="gridActionbutton">
</asp:Button>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle Wrap="True" />
</asp:GridView>
When in edit mode if the field is left blank, both of the error messages are displayed. If the user enters more than 80 characters, neither message is displayed.
I did this in an application using VS 2012. Can this be done in VS2010? If so, where am I going wrong?
Thanks.

Answer 1

use regularexpression validator or range validator instead of requiredfield validator for validating max length.
So you need to use one required field and the other is regular expression validator.