asp.net gridview column eval add 0s in front

trying to display '00001' in the gridview column from the database
where the value is only 1, 2, 3...etc

eg.
  <asp:TemplateField HeaderText="Invoice No." SortExpression="invoiceno" ItemStyle-Width="180px" ItemStyle-HorizontalAlign="Center">
                    <ItemTemplate>
                        <b><%# Eval("invoiceno")%></b>
                    </ItemTemplate>
                </asp:TemplateField>

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doramail05Asked:
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Ramkisan JagtapLead DeveloperCommented:
Have you checked the datasource? It might have the same value.
You need to adjust it in the query if the database has same value stored.
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doramail05Author Commented:
solved with this :
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doramail05Author Commented:
<asp:TemplateField HeaderText="Invoice No." SortExpression="invoiceno" ItemStyle-Width="180px"
                ItemStyle-HorizontalAlign="Center">
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# String.Format("{0:00000}", Convert.ToInt64(Eval("invoiceno")))%>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>

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doramail05Author Commented:
solve from other post
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