Dynamic mapping using xslt

Question

I have question regarding XSLT map. I saw xslt is embedded  as part of map dll. Now I have case like different vendors are sending me files in different structure . Let me clear here all my input is EDI files.
    Example one vendor is sending HL segment at header level and one at detail level. Other vendor send only at header level . So surely my map logic is different .
    So I was thinking create XSLT for each vendor and load dynamically based on ISA Id and GSId. Is it possible that load xslt dynamically something like this?
  If(ISAId == "sender1" && GSId ="sender1)
   //code to load map dll
  map1.LoadXslt(sender1xslt).
What is better way to handle this case . I  am not considering to create at receive location as I will get data from AS2 and I will have only one receive location.
   What is better approach for this? Do I need to create  separate  map for each TP and load it?
Please let me what is better approach in this case?

Answer 1

I tried one small sample with keeping map name in config file as 
<add key="Map1" value="DynamicMap.OrdMap,DynamicMap, Version=1.0.0.0, Culture=neutral, PublicKeyToken=51b3a99d8425ff5a"/>
<add key="Map2" value="DynamicMap.OrdMap2,DynamicMap, Version=1.0.0.0, Culture=neutral, PublicKeyToken=51b3a99d8425ff5a"/>
then in orchestration have 
expression shape with 
MapName = System.Configuration.ConfigurationManager.AppSettings["Map1"];
MyMapType = System.Type.GetType(MapName);
Then messageassignment shape with 
transform(OutMsg) = MapName(InMsg);
When I test it get following error with message get suspended
Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'DynamicMap.OrdOrc(948a9a82-1325-e745-d019-d110d636f3fd)'.
The service instance will remain suspended until administratively resumed or terminated. 
If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.
InstanceId: 9c6f164e-b194-4acf-ad14-cb3fcfdcea7d
Shape name: ConstructMessage_1
ShapeId: 595267b1-451b-42a3-b0e4-9ecca16205d9
Exception thrown from: segment 1, progress 11
Inner exception: Error encountered while executing the transform System.String. Error:Unable to create the transform..
Exception type: XTransformationFailureException
Source: Microsoft.XLANGs.Engine
Target Site: Void ApplyTransform(System.Type, System.Object[], System.Object[])
The following is a stack trace that identifies the location where the exception occured
   at Microsoft.XLANGs.Core.Service.ApplyTransform(Type mapRef, Object[] outParams, Object[] inParams)
Can anybody help me what it mean?