In this Post DropDown Extender Asp.Net

It can be attached to almost any Asp.Net control to provide a dropdown menu ( like Panel ).


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Important Properties of DropDown Extender
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DropDownControlID

TargetControlID


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RadioButtonList SelectedIndexChanged Event Coding
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        DropDownList1.Items.Clear();
        String country = RadioButtonList1.SelectedItem.Text;
        DropDownList1.Items.Add(new ListItem(country, country));


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Submit Button Click Coding
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Label3.Text = "You Have Selected Country " + DropDownList1.Text;

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