Activity › Forums › Salesforce® Discussions › What is Blob in Salesforce? Where it is Used?

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  • Saurabh

    Member
    April 26, 2017 at 1:05 pm

    Hi Suraj

    Blob is a collection of binary data stored as a single object. You can convert this data type to String or from String using the toString and valueOf methods, respectively. Blobs can be accepted as Web service arguments, stored in a document (the body of a document is a Blob), or sent as attachments.

    Blob Methods
    The following are methods for Blob.
    size()
    Returns the number of characters in the Blob.
    toPdf(stringToConvert)
    Creates a binary object out of the given string, encoding it as a PDF file.
    toString()
    Casts the Blob into a String.
    valueOf(stringToBlob)
    Casts the specified String to a Blob.

    Hope it may help:

     

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