$(document).ready(function () {
// Initialize Editor   
$('.textarea-editor').summernote(
{
    height: ($(window).height() - 300),         // set editor height  
    minHeight: null,       // set minimum height of editor  
    maxHeight: null,       // set maximum height of editor  
    focus: true,         
    callbacks: {
        onImageUpload: function (image) {
            editor = $(this);
            uploadImage(image[0], editor);
        }
    }
});
});

function uploadImage(file, editor) {
var data = new FormData();
data.append("image", file);
$.ajax({
    url: '/Home/UploadImage',
    cache: false,
    contentType: false,
    processData: false,
    data: data,
    type: "post",
    success: function (url) {
        editor.summernote('insertImage', 'http://' + url,'');
      },
      error: function(data) {
          console.log(data);
      }
  });
}