Transferring information to the controller via an Ajax Post request

Having trouble sending data to the controller via Ajax post because of code structure limitations. The object to be sent cannot be used within the ajax post due to how the code is organized. Knockout is being used for databinding the click event of the Update button.

Here's the current code snippet:

$(document).ready(function () {
var provider = function () {
    var self = this;
    self.providerID = ko.observable(providerEditInfo.ProviderID);
    self.firstName = ko.observable(providerEditInfo.FirstName);
    self.lastName = ko.observable(providerEditInfo.LastName);
    self.contactEmail = ko.observable(providerEditInfo.ContactEmail);
    self.NPI = ko.observable(providerEditInfo.NPI);

    self.updateProviderDetails = function () {
        $.ajax({
            url: "/Provider/UpdateProviderDetails/",
            type: "POST",
            data: { providerForUpdate }, -- Can't send this
            contentType: "application/json; charset=utf-8",
            async: false,
            success: function (result) {
                if (result.url) {
                    location.href = result.url;
                }
            }
        });
    };

    self.cancelEdits = function () {
        if (confirm("Are you sure you want to Cancel?")) {
            window.location.href = "/Provider/ShowTheListOfProviders";
        }
    };
}; //End of Constructor.

var providerForUpdate = new provider();
ko.applyBindings(providerForUpdate);
});

The 'updateProviderDetails' method is called when the Update Button is clicked.

HTML snippet:

 @model Greenway.Demo.DataAccess.Entity.Provider

<body>
    <div class="container">
    <h1 class="col-sm-offset-2">Edit Provider Details:</h1>
    <br />
    <form class="form-horizontal" role="form" id="editProviderDetailsForm">
        <div class="form-group">
            <label class="col-sm-2 control-label labelfont">First Name:</label>
            <div class="col-sm-6">
                <input type="text" class="form-control" autofocus="autofocus" placeholder="Enter the First Name" id="firstName" name="firstName" data-bind="value:firstName , event: { keypress: allowOnlyAlphabets }">
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label labelfont">Last Name:</label>
            <div class="col-sm-6">
                <input type="text" class="form-control" placeholder="Enter the Last Name" id="lastName" name="lastName" data-bind="value:lastName ,event: { keypress: allowOnlyAlphabets }">
            </div>
        </div>

       <div class="form-group text-center">
            <button type="Submit" data-bind="click: updateProviderDetails" class="btn btn-primary">Update</button>
            <button type="button" data-bind="click: cancelEdits" class="btn btn-primary">Cancel</button>
        </div>
    </form>
</div>
 </body>
 <script type="text/javascript">
      var providerEditInfo = @Html.Raw(Json.Encode(Model));
 </script>
  <script type="text/javascript" src="../../App_Scripts/Shared/Functions.js"></script>

Seeking guidance on how to pass data to the controller with this existing code structure. Cannot move updateProviderDetails outside the constructor without breaking the binding. Any suggestions?

Answer №1

It appears that providerEditInfo in your code is a JavaScript object. Consider creating an observable object instead of individual properties.

ko.mapping.fromJS(providerEditInfo, null, self.observableProvider);

Make sure to use self.observableProvider for binding, as it will make all the properties of providerEditInfo observable. Once done, send this observable to the controller as:

data: { ko.toJS(self.observableProvider)}

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