Adding child control to dropdownlist control

soumya p n

18y9.6k.NET

Hello,
I need to add child control(a textbox) based on the selected value of the dropdown list.I have done something like
private void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            if(DropDownList1.SelectedIndex==4)
            {
                TextBox txt = new TextBox();
                DropDownList1.Controls.Add(txt);
            }
        }
The above code gives the error saying,
'System.Web.UI.WebControls.DropDownList' does not allow child controls.
Any Help..?????

Thanks

Regards,
Soumya

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

soumya p n18y ago
Even i could not understand it entirely.. Need more explanation with an example.
suhail ahmed18y ago
can you please reply me with the code snippet.

I am facing difficulty how to use and override that method.

thnx in advance
jake shi18y ago
if you want to add child controls to dropdownlist ,you must inherit the base class:system.web.ui.control,and implement the interface:INamingContainer,

then you can override the base class's method:CreateChildControls.In this method you can do like this Control.Add(your textbox's name)

you can try it . good luck.