Another thing to keep in mind is that the string itself might be null.
public static Nullable<T> ToNullable<T>(this string s) where T: struct
{
Nullable<T> result = new Nullable<T>();
try
{
if (!string.IsNullOrEmpty(s) && s.Trim().Length > 0)
{
TypeConverter conv = TypeDescriptor.GetConverter(typeof(T));
result = (T)conv.ConvertFrom(s);
}
}
catch { }
return result;
}