Posts Tagged ‘add attachment to email’

Adding file as “Attachment” to activities programmatically in plug-in


We can add file as attachment and associate to the CRM objects i.e., Email, Task etc…

Email with attachment

Email with .pdf file as attachment

The entity that store attachment information is “activitymimeattachment”

Below is the code snippet to add “.pdf” file as attachment to the Email activity

Entity attachment = new Entity(“activitymimeattachment”);

attachment[“subject”] = “My Subject”;

string fileName = “Sample.pdf”;

attachment[“filename”] = fileName;

byte[] fileStream= = new byte[] { }; //Set file stream bytes

attachment[“body”] = Convert.ToBase64String(fileStream);

attachment[“mimetype”] = “text/plain”;

attachment[“attachmentnumber”] = 1;

Guid emailId; //GUID of Email activity

attachment[“objectid”] = new EntityReference(“email”, emailId);

attachment[“objecttypecode”] = “email”;

IOrganizationService service;


Note :-

  • In the above code the property “objecttypecode” is slight misleading, as it expects “EntityLogicalName” rather than “EntityTypeCode”
  • So make sure to set  attachment[“objecttypecode”] = EntityLogicalName (i.e., email)