Required field validation Inside Gridview Edit Item Template

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VB

Hii Experts I have a grifview in which 3 textbox are there in the edit item template.I want to validate these textboxes with required field validation .I have done using very old fashion validation(given below).Please suggest me some new technique for validation inside gridview edit item template.If possible suggest me in javascript.Here is my source code

<asp:GridView ID="GvEditEvent" runat="server" Width="500px" AutoGenerateColumns="False" DataKeyNames="EId" AutoGenerateEditButton="true" AutoGenerateDeleteButton="true">
        <Columns>
            <asp:TemplateField HeaderText="Event Date">
            <EditItemTemplate>
                <asp:TextBox ID="txtEDate" Text='<%#Bind("EDate") %>' runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator2"   runat="server" ControlToValidate="txtEDate" ErrorMessage="Please enter EventDate">*</asp:RequiredFieldValidator>
                  <ajaxToolkit:CalendarExtender ID="CalendarExtender2"
                                                      runat="server"
                                                      TargetControlID="txtEDate"
                                                      CssClass="MyCalendar"
                                                      Format="dd/MM/yyyy"
                                                      Enabled="True">
                       </ajaxToolkit:CalendarExtender>

            </EditItemTemplate>
              <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("EDate") %>'></asp:Label>
               </ItemTemplate>
               <ItemStyle Width="90px" HorizontalAlign="center" VerticalAlign="top" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Event Details">
              <EditItemTemplate>
                <asp:TextBox ID="txtEDetails" Text='<%#Bind("EDetails") %>' TextMode="multiline" Height="150px" runat="server"></asp:TextBox>
                 <asp:RequiredFieldValidator ID="RequiredFieldValidator2"   runat="server" ControlToValidate="txtEDetails" ErrorMessage="Please enter EventDetails">*</asp:RequiredFieldValidator>

            </EditItemTemplate>
               <ItemTemplate>
                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("EDetails") %>'></asp:Label>
                </ItemTemplate>
                 <ItemStyle Width="130px" HorizontalAlign="center" VerticalAlign="top" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="EventImage">
                <EditItemTemplate>
                    <asp:FileUpload ID="fupEImage" runat="server" />
                </EditItemTemplate>
             <ItemTemplate>
                    <asp:Image ID="Image1" ImageUrl='<%#Eval("Img")%>'  Width="100px" Height="100px" runat="server" />
                        <asp:HiddenField ID="hdnImage" Value='<%#Eval("Img")%>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

Is there any other way of giving validation .Because I m not able to show validation summery in the gridview
Thank You
Sandeep Mishra
Software Developer