Comment importer un fichier excel dans angular js?

Voici la Solution Complète pour le téléchargement de fichier xls dans mongodb aide moyenne de

---

## In HTML ##
<input type="file" name="file" id="fileUpload" file-model="myFile" 
 title="ChooseYour file" onchange="return ValidateExtension()" 
 required="required" />
<button value="Upload" name="submit" class="btn btn-success" ng-
 click="UploadCompanyContact()"></button>

---

   ## In Controller ##
    $scope.UploadCompanyContact = function(){
var file = $scope.myFile;
alert(JSON.stringify(file.name));
    var uploadUrl = "/college/upload_company_contact";
    var fd = new FormData();
    fd.append('file', file);    
    $http.post(uploadUrl,fd, {

        transformRequest: angular.identity,
        headers: {'Content-Type': undefined}
    })
    .success(function(response , status){
        if(response=="true"){
            $.gritter.add({
                text: 'Successfully company contacts  is uploaded',
                class_name: 'gritter-success'
            });
        } else {
            $.gritter.add({
                text: 'Oopss..!! Something went wrong',
                class_name: 'gritter-error'
            });
        }

            $scope.loadCollegeData();
    })
    .error(function(){
        $.gritter.add({
            text: 'Oopss..!! Something went wrong',
            class_name: 'gritter-error'
        });
    });

---

    ## In Route(nodejs) ##
router.post('/college/upload_company_contact',function(req,res){
var exceltojson; 
uploadcsv(req,res,function(err){
if(err){
console.log("error"+err);
}
if(!req.file){
console.log("error 1 ");
return;
}
if(req.file.originalname.split('.')
[req.file.originalname.split('.').length-1] === 'xlsx'){
exceltojson = xlsxtojson;
} else {
exceltojson = xlstojson;
}
try {
exceltojson({
input: req.file.path,
output: null, 
lowerCaseHeaders:true
}, function(err,result){
if(err) {
} 
var data = result;
console.log(JSON.stringify(data)+"asdfasdfasdfsdf");
for(var i=0;i<data.length;i++){
var newuploadCompanyContact = new uploadCompanyContact();
newuploadCompanyContact._id= objectID();
newuploadCompanyContact.college_id=req.user.reference_id;
newuploadCompanyContact.company_name=data[i].company_name;
newuploadCompanyContact.company_email=data[i].company_email;
newuploadCompanyContact.company_contact=data[i].company_contact;
newuploadCompanyContact.company_address=data[i].company_address;
newuploadCompanyContact.company_city=data[i].company_city;
newuploadCompanyContact.company_country=data[i].company_country;
newuploadCompanyContact.contact_personname=data[i].contact_personname;
newuploadCompanyContact.contact_personemail=data[i].contact_personemail;
newuploadCompanyContact.contact_personmobile=data[i].contact_personmobile;
newuploadCompanyContact.save(function(err,uploadcompany){
if(err) {console.log("sorry data not inserted 
:"+err);res.json("false");}
if(uploadcompany){console.log("data inserted sucessfully : 
"+uploadcompany);res.json("true");}
});
} 
});
} catch (e){
console.log("catchhhhh");
}
})
})

---

  ## In Model ##
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var CollegeCompanySchema = new Schema({
_id: { type: String, unique: true, required: true },
college_id: {type: String},
company_name:{type:String,default:''},
company_email:{type:String,default:''},
company_contact:{type:String,default:''},
company_address:{type:String,default:''},
company_city:{type:String,default:''},
company_country:{type:String,default:''},
contact_personname:{type:String,default:''},
contact_personemail:{type:String,default:''},
contact_personmobile:{type:String,default:''},
});
var collectionName = 'college-company';
var CollegeCompany = module.exports = mongoose.model('CollegeCompany', 
CollegeCompanySchema, collectionName);
module.exports = CollegeCompany;