public Expression AcquireValue(HttpContext context)
{
switch (Type)
{
case ValueType.QueryString:
_Value = context.Request.QueryString[Key] ?? string.Empty;
break;
case ValueType.Session:
object o = context.Session[Key];
_Value = o == null ? string.Empty : o.ToString();
break;
case ValueType.Method:
if (Parameters != null)
{
foreach (Expression Parameter in Parameters)
{
Parameter.AcquireValue(context);
}
}
break;
}
return(this);
}