试试
e.ResponseHeaders.Add("Access-Control-Allow-Origin","http://127.0.0.1")
e.ResponseHeaders.Add("Access-Control-Allow-Headers","Content-Type,token,varCompanyId,sonComid,device,fileid,tbName,varColName")
或者
e.ResponseHeaders.Add("Access-Control-Allow-Origin",e.Headers("Origin"))
e.ResponseHeaders.Add("Access-Control-Allow-Headers","Content-Type,token,varCompanyId,sonComid,device,fileid,tbName,varColName")