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What is the use of Blob Variable in Salesforce?
What is the use of Blob Variable in salesforce?
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2 Replies
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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. -
Blob Variable :
- It is a collection of Binary data which is stored as object.
- It is used to store the attachment in Salesforce into a variable and it converts the attachments into a single object.
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