Upload file using "File Upload control" HTML field in ms from

/* Note: Modify the ‘id’ and ‘name’ variables according to your scenario, this is for the case if you are opening a custom web resource from an entity */

// Get Id and entity Name from the parent opener

var id = Xrm.Page.data.entity.getId();

var nam = Xrm.Page.data.entity.getEntityName();

function _arrayBufferToBase64(buffer) 

{ // Convert Array Buffer to Base 64 string

var binary = '';

var bytes = new Uint8Array(buffer);

var len = bytes.byteLength;

for (var i = 0; i < len; i++) 

{

binary += String.fromCharCode(bytes[i]);

}

return window.btoa(binary);

}

 

// function for Creating note record using SDK REST

function createNote(title, description, docBody, fName, mType) 

{

var entity = {};

if (docBody != null & fName != null & mType != null) {

entity.DocumentBody = docBody;

entity.FileName = fName;

entity.MimeType = mType;

}

entity.Subject = title;

entity.NoteText = description;

entity.ObjectId = {

Id: id,

LogicalName: nam

};

SDK.REST.createRecord(

entity,

"Annotation",

function (result) {

var newEntityId = result.AnnotationId;

opener.RetrieveAnnotations(null);

window.close();

},

function (error) {

Xrm.Utility.alertDialog(error.message, null);

}

);

}

// function behind the onclick of Save button

function save() 

{

var file = document.getElementById("file_Attach").files[0];

var subject = null; //document.getElementById("title").value;

var desc = null;    //document.getElementById("text").value;

if (file) {

var reader = new FileReader();

reader.onload = function (evt) 

{

var str = _arrayBufferToBase64(reader.result);

createNote(subject, desc, str, file.name, file.type);

}

reader.readAsArrayBuffer(file);

}

else {

createNote(subject, desc, null, null, null);

}

}