How to convert string to mongoDB.Bson.ObjectId

[mscsf...@pucit.edu.pk]

I am working in Asp.net C# and database is MongoDb, I want to convert the userID (entered by console) to ObjectId.

ObjectId userId = System.Console.ReadLine();

How it can be done ?

[William Berkeley]

Hi. An ObjectId is a special 12-byte BSON type constructed from a timestamp, a machine id, a process id, and a counter value. There is no general way to convert an arbitrary input string into an ObjectId; it must already be in the right format.

Why do you want to convert the userId to an ObjectId? If you tell us more about your use case there might be a better way to achieve what you are trying to do.

-Will

[William Zola]

Hi!

You seem to be under the impression that the _id of a document must be an ObjectID.  This is not the case.  You can use anything you like as the Primary Key of a document.  If the userID is guaranteed to be unique, you can use it as the Primary Key of the document by storing it in the _id field, unmodified.

 -William 

[Robert Stam]

You can convert a string (assuming it is in the proper format of course) to an ObjectId as follows:

var userIdString = Console.ReadLine();

var userId = new ObjectId(userIdString);

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