First option will be invisible After click on DropDown List...

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C#

ASP.NET

hi all,

My Requirement is, at page load an user can see "---Select color--" option.after click on dropdown list,user can see only "Red" "Green" and "Blue" options.so how to invisible the "---Select color--"option. but my below code still displaying "--select color---","red","blue" & "Green" .plz help me.

Thanks & regards
Papu
.aspx

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true"
    onselectedindexchanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem>---Select color--</asp:ListItem>
<asp:ListItem>Red</asp:ListItem>
<asp:ListItem>Green</asp:ListItem>
<asp:ListItem>Blue</asp:ListItem>
</asp:DropDownList>

.aspx.cs

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (DropDownList1.SelectedIndex != 0)
    {
       DropDownList1.Items.Remove("---Select color--");
    }
}