Session: How to Check if an Attachment Exists

• To check whether a document contains a certain attachment, use the method Exists() from the session.Advanced.Attachments operations.

• This does not load the document or the attachment from the server, and it does not cause the session to track the document.

• In this page:

  • Syntax
  • Example

Syntax

• Sync
• Async

bool Exists(string documentId, string name);

Task<bool> ExistsAsync(string documentId, string name, CancellationToken token = default);

Parameter	Type	Description
documentId	string	The ID of the document you want to check for the attachment
name	string	The name of the attachment you want to check the document for

Return Value	Description
bool	Indicates whether the document has an attachment with the specified name

Example

• Sync
• Async

bool exists = session
              .Advanced
              .Attachments
              .Exists("categories/1-A","image.jpg");

if (exists)
{
  //do something
}

bool exists = await asyncSession
                      .Advanced
                      .Attachments
                      .ExistsAsync("categories/1-A", "image.jpg");

if (exists)
{
  //do something
}