javascript - Submitting partial view data from parent view

Question

How to submit partial view data from parent view .

I am newbie to MVC,
I have created a partial view _CurrentData which contains editor controls - textbox etc
and added Submit button in the main view:

<div class="row">
    <div class="col-md-12">
        @Html.Partial("_CurrentData", Model.CurrentItemDetails)
    </div>
</div>
<div class="row">
    <div class="col-md-2 col-md-offset-5">
        <div>
            <input type="button" class="btn btn-primary" value="Submit" id="btnSubmit"/>
            &nbsp;&nbsp;
            <input type="button" class="btn btn-primary" value="Cancel" id="btnCancel" />
            <br/><br />
        </div>
    </div>
</div>

ViewModel

public class ProductionViewModel
{
    public ItemDetails CurrentItemDetails { get; set; }
}

public class ItemDetails
{
    public int ID { get; set; }
    public string Name { get; set; }
}

View

<div class="panel panel-default">
    <div class="panel-heading">
        <h3 class="panel-title">Editor</h3>
    </div>
    <div class="panel-body">
        <div class="row form-group">
            <div class="col-sm-4 control-label text-right">
                <strong>Name:</strong>
            </div>
            <div class="col-sm-8 control-label">
                @Html.TextBoxFor(m => m.Name , new { @class = "form-control" })
            </div>
        </div>
    </div>
</div>

now on clicking of 'btnSubmit' I want to submit data from _CurrentData view to the server and then refresh the partial view,
How to accomplish this?

Answer 1

What you're asking for

The functionality you're asking for is AJAX. AJAX requests are 'Asynchronous', which at the most basic level means HTTP requests can be initiated and responded to without the need to refresh the page.

As someone wrote in comment to your question, jQuery can be used and does provide a nice way to do AJAX requests, but a lot of people would probably cry if you included the entire jQuery library just for an AJAX request.

JavaScript

So in JavaScript this is a liiiiiittle bit more complicated, there are some examples here. I'm not going to show you how to do it in JavaScript simply because I don't have a lot of time right now, but I might update the answer later. I would probably advise looking into doing it this way if you can.

jQuery

In jQuery this is easy. The documentation for AJAX requests is here.

Basically what you need to do is make a request to the server so it can update your partial view data and then return the new partial view for you to replace your current HTML with. It would look something like:

$.fn.serializeObject = function () {
    var o = {};
    var a = this.serializeArray();
    $.each(a, function () {
        if (o[this.name]) {
            if (!o[this.name].push) {
                o[this.name] = [o[this.name]];
            }
            o[this.name].push(this.value || '');
        } else {
            o[this.name] = this.value || '';
        }
    });
    return o;
};

$.ajax({
    url: '@Url.Content("~/Controller/_CurrentData")',
    type: 'POST',
    data: {
        //partialViewForm relates to the form element in your partial view
        model: JSON.stringify($('#partialViewForm').serializeObject());
    },
    success: function (response) {
        if (response) {
            //partialViewDiv relates to the div in which your partial view is rendered
            $('#partialViewDiv').html(response);
        }
    },
    error: function (xhr, ajaxOptions, thrownError) { alert(xhr.status); alert(thrownError); }
});

The above would assume you had something like this as your controller method:

[HttpPost]
public ActionResult _CurrentData(ItemDetails model)
{
    //do stuff with model here
    return PartialView("_CurrentData", model);
}

So this is basically how you'd contact the controller. In order to call that ajax from your webpage, you'd need to have a button in your partial view within the form that you can override using event.preventDefault().