Photo uploading in ASP.NET MVC - encountering null HttpPostedFileBase issue

QUESTION:

I'm having an issue where the Photo1 value is null in the controller post method despite uploading it. Can someone help with this?

This is my model class:

class ProductVM{
    public string Name { get; set;}
    public string Color {get; set;}
    public HttpPostedFileBase Photo1 { get; set; }
    }

Below is how I implemented the view using Razor:

@model Project.Models.ProductVM

@using (Html.BeginForm("AddItem","Item", FormMethod.Post, new { enctype = "multipart/form-data" }))
{


   @Html.AntiForgeryToken()
    @Html.ValidationSummary(true, "", new {@class = "text-danger"})

    @Html.EditorFor(model => model.Name, new {htmlAttributes = new {@class"form-control"}})
    @Html.ValidationMessageFor(model => model.Name)

// other fields editor's and dropdown's ...


<div class="col-xs-offset-2 col-xs-8 add-item-rectangle"><input type="file" name="@Model.Photo1" id="file"/></div>
<div class="col-xs-10 add-item-rectangle"></div>

<input type="submit" class="btn btn-block add-item-button-text" value="Send"/>

This is the code for the Post Controller method:

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AddItem(ProductVM product)
{            
 //**heere when debuging Photo1 is null despite fact that i uploaded photo**

if (!ModelState.IsValid)
{
    //... my stuffs
}

//..
return RedirectToAction("Index", "Home");
}

Answer №1

To start off, it is not possible to directly post to a byte array. Therefore, you will need a view model to represent the product being created or modified. In your view model, make sure that your file upload properties are typed as HttpPostedFileBase:

public HttpPostedFileBase Image1Upload { get; set; }
public HttpPostedFileBase Image2Upload { get; set; }

Your post action should accept your view model as a parameter:

[HttpPost]
public ActionResult CreateProduct(ProductViewModel model)

Within this action, you will need to map the posted values from the view model to the corresponding properties on your entity class. For handling uploads:

if (model.Image1Upload != null && model.Image1Upload.ContentLength > 0)
{
    using (var ms = new MemoryStream())
    {
        model.Image1Upload.InputStream.CopyTo(ms);
        product.Image1 = ms.ToArray();
    }
}

Repeat the process for any other uploads. It is also recommended to add validation to ensure that the uploaded files are indeed images.

Lastly, save your entity as usual.

UPDATE

In your updated code snippet, you have the following:

<div class="col-xs-offset-2 col-xs-8 add-item-rectangle">
    <input type="file" name="@Model.Photo1" id="file"/>
</div>

Using @Model.Photo1 would simply output the value of Model.Photo1, which does not work with a file input. Instead, Razor would just call ToString on the property and result in a name attribute like

name="System.Web.HttpPostedFileBase"
. This is incorrect. You should instead use something like:

<input type="file" name="@Html.NameFor(m => m.Photo1)" id="file" />

Alternatively, consider using a helper to generate the entire input:

@Html.TextBoxFor(m => m.Photo1, new { type = "file" })

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Placing content retrieved from a MySQL database within a form displayed in a ColorBox

Having difficulty inserting text from a MySQL database into a form (textfield) inside a ColorBox. The current script is as follows: <a href="#" class="bttn sgreen quote1">Quote</a> var postQuote[<?php echo 4id; ?>]=<?php echo $f ...

Modify the font style of the jQuery autocomplete box to customize the text appearance

Hello, I'm a beginner with jquery and currently experimenting with the autocomplete feature. I managed to change the font of the dropdown list successfully but struggling to do the same for the input field itself. Does anyone know how to achieve this ...

Issue with making requests across origins in Vuejs using axios

Currently, I am utilizing Vuejs and axios for handling web requests. So far, I have successfully managed to perform GET, POST, and PUT operations. However, the new challenge that I am facing is uploading media to the server. The server necessitates sending ...

Error: selenium web driver java cannot locate tinyMCE

driver.switchTo().frame("tinymce_iframe"); String script="var editor=tinyMCE.get('tinymce_textarea');"; JavascriptExecutor js=(JavascriptExecutor) driver; js.executeScript(script); I'm encountering a WebDriverException while try ...

Tips for utilizing props in a Vue component

When trying to incorporate a prop into a computed value, I encounter the following error: [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined" found in ---> at src/cmps/space-details/space-imgs.vue at src/pages ...

Leverage the power of Web Components in Vue applications

Currently, I am attempting to reuse Web Components within a Vue Component. These Web Components utilize the template element for formatting output. However, when I insert them into the Vue Template, they are either removed from the DOM or compiled by Vue. ...

Avoid displaying "undefined" on HTML page when Firebase database value is empty

I am trying my best to explain my issue, although I struggle with scripts. Please bear with me and help me improve. ˆˆ Below is the script I am working on. The goal is to display all records with a date set for 'today or in the future'. Progr ...

My Angular custom libraries are having issues with the typing paths. Can anyone help me troubleshoot what I might be doing

After successfully creating my first custom Angular library using ng-packagr, I encountered an issue where the built library contained relative paths specific to my local machine. This posed a problem as these paths would not work for anyone else trying to ...

Utilizing React Material-Table to Trigger a React Component through Table Actions

I have set up a datatable using the code below. <MaterialTable icons={tableIcons} title={title} columns={columns} data={data} actions={[ { icon: () => <Edit />, t ...

Overriding a shared module service in Angular from a separate module: A step-by-step guide

I am working with various modules such as SchoolModule, UniversityModule, and SharedModule The SharedModule includes a BaseService that both the SchoolModule and UniversityModule providers are utilizing as an extension When loading the SchoolModule, I ne ...

Failure to load image logo when refreshing the page

There's something peculiar happening in my App.vue. Imagine I have a route link, let's say it's localhost/tools or any similar route. The logo image will display on this route. Take a look at the image here https://i.stack.imgur.com/6HaXI.p ...

Issues with Fetch API and CORS in Web Browsers

Hello, I'm encountering an issue related to CORS and the Fetch API when using browsers. Currently, my setup involves running a NodeJS server built with Express on localhost:5000. This server responds to a GET request made to the URL /get_a, serving ...

The scrolltop function is dysfunctional on CentOS operating systems

I'm currently working on implementing smooth scrolling functionality when a button is clicked. The feature works perfectly fine with a local Apache server and IE10+, but when the project is deployed on "CentOS", it doesn't work on the same browse ...

I am encountering a problem with the app.patch() function not working properly. Although the get and delete functions are functioning as expected, the patch function seems to be

I am in the process of setting up a server that can handle CRUD operations. The Movie model currently only consists of one property, which is the title. Although I can create new movies, delete existing ones, and even search for a ...

Ensuring the accuracy of forms using third-party verification services

While working on an Angular form validation using an external service, I encountered a cannot read property of undefined error. The component contains a simple form setup: this.myForm = this.fb.group({ username: ['', [this.validator.username] ...

Utilizing React with file system and path dependent packages

Is there a way to utilize the quick.db package in my ReactAPP with hooks, even though React does not allow the use of FS & Path which are required for this package? I am encountering the following errors: ERROR in ./node_modules/file-uri-to-path/index.js ...

Is there a way for me to implement this code to achieve the functionality shown in the demo link

$('select').change(function() { var sum = 0; var sum = parseInt($('select[name="bathrooms"]').val() * 25) + parseInt($('select[name="bedrooms"]').val() * 8); $("#sum").html(sum); }); <script src="https://ajax.googleap ...

React setState issue experienced only on initial click due to API lag

My goal is to develop a web app using the Poke API to display multiple Pokemon. I have added buttons to allow users to "change the page" and switch the API URL to view the next or previous set of Pokemon. However, I'm facing an issue where the buttons ...

Using Ember's transitionTo method and setting a controller attribute within a callback

I am working with Ember code to transition to a specific route while also setting controllerAttr1 on 'my.route' Upon transitioning to "my.route" using this.get('router').transitionTo("my.route"), I have set up a callback function that ...

"Learn the trick to easily switch between showing and hiding passwords for multiple fields in a React application

I am looking to implement a feature that toggles the visibility of passwords in input fields. It currently works for a single input field, but I am unsure how to extend this functionality to multiple input fields. My goal is to enable the show/hide passwo ...