Question

I’m trying to set a custom ClientID to my DropDownList to later on be able to get the selected value using javascript.

Setting it like
ClientID="<%=MyVar%>" it works fine, but when I try to concatenate some string then it messes up.

ClientID="dropdown_<%=MyVar%>" the output would be
literally clientid=”dropdown_<%=MyVar%>”

It is possible to do it?

Answer 1

I would suggest you to create a public method on your web page that concatenate the string then you can call it from the page source (easier to maintain and reuse)

public string GetClientId()
{
  return "dropdown" + yourVar;
}

ClientID="<%=GetClientId()%>"