Can I add submenu to dropdownlist having listitem

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Hi Everyone i am trying to use submenu to dropdown list by using list or option but it doesn't allow to use list or option can any one help, As i want to add submenu in support option

<asp:DropDownList ID="ddlPhase" CssClass="selectbox1" runat="server">
                            <asp:ListItem Value="-1">-SELECT-</asp:ListItem>
                            <asp:ListItem Text="Analysis" Value="Analysis"></asp:ListItem>
                             <asp:ListItem Text="Planning" Value="Planning"></asp:ListItem>
                              <asp:ListItem Text="Execution" Value="Execution"></asp:ListItem>
                               <asp:ListItem Text="Control" Value="Control"></asp:ListItem>
                            <asp:ListItem Text="Support" Value="Support"></asp:ListItem>
                            </asp:DropDownList>

What I have tried:

<asp:DropDownList ID="ddlPhase" CssClass="selectbox1" runat="server">
                            <asp:ListItem Value="-1">-SELECT-</asp:ListItem>
                            <asp:ListItem Text="Analysis" Value="Analysis"></asp:ListItem>
                             <asp:ListItem Text="Planning" Value="Planning"></asp:ListItem>
                              <asp:ListItem Text="Execution" Value="Execution"></asp:ListItem>
                               <asp:ListItem Text="Control" Value="Control"></asp:ListItem>
                            <asp:ListItem Text="Support" Value="Support">
<li>****</Li></asp:ListItem>
                            </asp:DropDownList>

I tried google also please can anyone help

Posted 24-Sep-17 21:00pm

Member 11644373

Updated 24-Sep-17 22:35pm

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Karthik_Mahalingam · Answer 1 · 2017-09-24T22:35:00

try something like this

<asp:DropDownList ID="ddlPhase"  runat="server">
      <asp:listitem value="-1">-SELECT-</asp:listitem>
      <asp:listitem text="Analysis" value="Analysis"></asp:listitem>
      <asp:listitem text="Planning" value="Planning"></asp:listitem>
      <asp:listitem text="Execution" value="Execution"></asp:listitem>
      <asp:listitem text="Control" value="Control"></asp:listitem>
      <asp:listitem style="font-weight:bold" text="Support" value="Support"></asp:listitem>
      <asp:listitem text="   Support 1" value="Support1"></asp:listitem>
      <asp:listitem text="   Support 2" value="Support2"></asp:listitem>
      <asp:listitem  style="font-weight:bold" text="Other" value="Other"></asp:listitem>
      <asp:listitem text="   Other 1" value="Other1"></asp:listitem>
      <asp:listitem text="   Other 2" value="Other2"></asp:listitem>
  </asp:DropDownList>

or have a look on HTML optgroup tag[^]

use & nbsp;[^] for space