How to use "If Condition" with <%#Eval("")%> Function

Sometimes you might need to use if condition in Eval function,

But if condition is not support by Eval
Not able to use if condition with <%#Eval("sPhone")%>

see this code


-----------IN HTMl code---------------

<%#ReplaceField(Eval("sWebSite").ToString())%>


-----------IN code behind code--------
public string ReplaceField(string stat)
{
string newValue = "";
if (stat == "N/A")
{
newValue=""+stat+"";
}
else
{
newValue = "" + stat + "";
}

return newValue;
}