Question

I made a form that gets send to my email.
now there is a a droplist box in which there is an options of afew, lets say colors, and at the end there is the option “Other” in which I want a textbox to apear beanth so the client can write the “color” he wants.

anyidea how to make it?

Im using VBcode with ASP.NET

if you need my code please let me know

thank you in advance

Answer 1

You can set AutoPostBack=True and then handle OnSelectedIndexChanged event. In the event handler check if the DropdownList.SelectedItem.Text=”Others” and then show or hide the textbox.

Use update panel to avoid the full page postback.

<asp:DropDownList ID="DropDownList1" runat="server" 
        onselectedindexchanged="DL1_SelectedIndexChanged" AutoPostBack="true">
        <asp:ListItem></asp:ListItem>
        <asp:ListItem>Others</asp:ListItem>
    </asp:DropDownList>
    <asp:TextBox ID="TextBox1" runat="server" Visible="false">

And in the codebehind

Protected Sub DL1_SelectedIndexChanged(sender As Object, e As EventArgs)
    If DropDownList1.SelectedItem.Text = "Others" Then
        TextBox1.Visible = True
        Else
                TextBox1.Visible= False
    End If
End Sub