DropDown List Validator

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HI to All
This is My HTML Code Bust Not Work Correctly
When Run Program And Click Insert show message Please Enter Discipline
Please Help Me.

XML

<asp:TemplateField HeaderText="Discipline">
    <EditItemTemplate>
        <asp:DropDownList ID="lstDiscipline" runat="server" Text='<%# Bind("Discipline") %>'>
            <asp:ListItem Text="AR" Value="AR"></asp:ListItem>
            <asp:ListItem Text="PI" Value="PI"></asp:ListItem>
            <asp:ListItem Text="ST" Value="ST"></asp:ListItem>
        </asp:DropDownList>
        <asp:RequiredFieldValidator ID="rfvDiscipline" ValidationGroup="Update" runat="server"
            ControlToValidate="lstDiscipline" ErrorMessage="Please Enter Discipline" InitialValue="-1"
            ToolTip="Please Enter Discipline" SetFocusOnError="true" ForeColor="Red">*
        </asp:RequiredFieldValidator>
        <asp:RegularExpressionValidator ID="reDiscipline" runat="server" ControlToValidate="lstDiscipline"
            ErrorMessage="Please Enter Discipline" ToolTip="Please Enter Discipline" InitialValue="-1"
            SetFocusOnError="true" ForeColor="Red" ValidationExpression="\*" ValidationGroup="Update">*
        </asp:RegularExpressionValidator>
    </EditItemTemplate>
    <FooterTemplate>
        <asp:DropDownList ID="lstDiscipline" runat="server" >
            <asp:ListItem Text="AR" Value="AR"></asp:ListItem>
            <asp:ListItem Text="PI" Value="PI"></asp:ListItem>
            <asp:ListItem Text="ST" Value="ST"></asp:ListItem>
        </asp:DropDownList>
        <asp:RequiredFieldValidator ID="rfvDiscipline" ValidationGroup="Insert" runat="server"
            ControlToValidate="lstDiscipline" ErrorMessage="Please Enter Discipline" InitialValue="-1"
            ToolTip="Please Enter Discipline" SetFocusOnError="true" ForeColor="Red">*
        </asp:RequiredFieldValidator>
        <asp:RegularExpressionValidator ID="reDiscipline" runat="server" ControlToValidate="lstDiscipline"
            ErrorMessage="Please Enter Discipline" ToolTip="Please Enter Discipline" InitialValue="-1"
            SetFocusOnError="true" ForeColor="Red" ValidationExpression="\*" ValidationGroup="Insert">*
        </asp:RegularExpressionValidator>
    </FooterTemplate>
    <ItemTemplate>
        <%# Eval("Discipline")%>
    </ItemTemplate>
</asp:TemplateField>

Posted 27-Mar-14 21:50pm

Assaad_AW

Updated 27-Mar-14 21:52pm

v2

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sankarsan parida · Answer 1 · 2014-03-27T22:43:00

See -1 is a concept about dropdown item index.
InitialValue concept: will check the selected item value if it will match with initialValue the required field validation will catch.

For that you have assign one select item to each of dropdownlist
Like below

ASP.NET

<asp:DropDownList ID="lstDiscipline" runat="server" >   
<asp:ListItem Text="Select" Value="-1"></asp:ListItem>        
  <asp:ListItem Text="AR" Value="AR"></asp:ListItem>
          <asp:ListItem Text="PI" Value="PI"></asp:ListItem>
          <asp:ListItem Text="ST" Value="ST"></asp:ListItem>
      </asp:DropDownList>
      <asp:RequiredFieldValidator ID="rfvDiscipline" ValidationGroup="Insert" runat="server"
          ControlToValidate="lstDiscipline" ErrorMessage="Please Enter Discipline" InitialValue="-1"
          ToolTip="Please Enter Discipline" SetFocusOnError="true" ForeColor="Red">*
      </asp:RequiredFieldValidator>