When the page loads the following error appears "object reference not set to an instance"

Question

when page load then shows error

Object reference not set to an instance

What's wrong with the code?

HTML:

   <div class="col">
     <label for="lblPartyName">Image File</label>
         <div class="col-4">
           <img src="@Url.Content(Model.imagePath)" style="margin:10px; border:solid 1px" height="20" width="20" id="ImagePreview" />
           <input type="file" name="imageFile" accept="image/jpeg,image/png" onchange="ShowImagePreview(this,document.getElementById('ImagePreview'))" />

         </div>
     </div>

jQuery/javascript

<script>

    function ShowImagePreview(ImageUploder, previewImage)
    {
        if (ImageUploder.files && ImageUploder.files[0])
        {
            var reader = new FileReader();
            reader.onload = function (e) {
                $(previewImage).attr('src', e.target.result);
            }
            reader.readAsDataURL(ImageUploder.files[0]);
        }
    }


</script>

Model

[NotMapped]
    public HttpPostedFileBase imageFile { get;set; }
    public string imagePath {get;set;}
    public Quotation()
    {
        imagePath = "~/AppFiles/Images/Default.png";
    }

you need to find the line the error is occuring on - do you have the full error message call stack? — jazb, Oct 12 '18 at 06:16
at first imagePath will be empty so `Url.content` trying to get the content from the empty path. — Just code, Oct 12 '18 at 06:16
Sounds like the `imagePath` property is already assigned, but you're not returning the viewmodel by `return View(viewmodel)`, hence `Model` has null value and NRE thrown when `Model.imagePath` is used. — Tetsuya Yamamoto, Oct 12 '18 at 06:30
but I am giving a default image in the model. you can see I have created a constructor Quotation and give a default path of the image. — Journal Trends, Oct 12 '18 at 06:38
Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Cee McSharpface, Oct 12 '18 at 06:54

When the page loads the following error appears "object reference not set to an instance"

0 Answers0