文件上传时的处理
$scope.submit = function(){
var url = $scope._datalistmodel.impexp.imp;
var t_file = new FormData(document.getElementById('upload_file'));//id是form表单的id
$http({
headers : {
'content-type':undefined
},
url : url,
data : t_file,
method : 'post',
transformRequest:angular.identity
}).then(function(d){
});
};
