public Stream CreateDocument(Stream templateBytes, Stream mappingBytes, DocumentPayload payload)
{
var templateFields = OpenXmlWordProcessing.FindTemplateFields(templateBytes);
MappingInfo mappingInfo;
if (mappingBytes != null)
{
mappingInfo = OpenXmlSpreadsheet.GetMappingInfo(mappingBytes, payload.Sources);
}
else
{
mappingInfo = OpenXmlSpreadsheet.BuildIdentityExpressions(templateFields, payload.Sources);
}
var results = CreateDocumentInternal(templateFields, mappingInfo.Expressions, mappingInfo.Sources);
var contentControlData = BuildContentControlData(templateFields, results);
return(OpenXmlWordProcessing.MergeTemplateWithMappings(contentControlData, templateBytes));
}