Sending a JSON object as a map through AJAX to an MVC controller

Question

Sending a JSON object as a map through AJAX to an MVC controller

I am looking to send a map (dictionary) to the MVC controller along with a string parameter.

var reportName= 'ReportName';

    var FilterValues = new Map([
[0, "value1"],
[1, "value2"],
[2, "value3"],
]);

var model = { reportName: reportName, FilterValues: JSON.parse(FilterValues) };
        $.ajax({
            url: '/Reports/ExportReport/',
            type: 'POST',
            contentType: "application/json",
            data: model,
        success: function(){
            alert('success');
        }, 
        error: function(){
            alert('failure');
        }
    });


 public void ExportReport(string reportName, Dictionary<int, string> FilterValues)

        {

I attempted this approach using an Object instead of a map. Although it returned success, it did not hit the controller.

let FilterValues = {
            1: "value1",
            2: "value2",
            3: "value3",
        };

        var report = 'test';
      //  var data = ('#DesignationReport').DataTable().$('input,select,textarea').serialize();
        var model = { reportName: report, FilterValues: FilterValues };

This marks my latest attempt.

javascript json ajax model-view-controller controller

Answer 1

Answer №1

To work around the lack of support for ES2015 constructs like Map in JSON, we can create a custom class as shown below:

 public class ViewModel
    {
        public List<FilterValue> FilterValues { get; set; }
        public string ReportName { get; set; }
    }

    public class FilterValue
    {
        public int Id { get; set; }
        public string Value { get; set; }
    }

The post method will look something like this:

[HttpPost]
        public ActionResult ExportReport(ViewModel model)
        {
            var report = model.ReportName;
            var values = model.FilterValues;
            return new EmptyResult();
        }

Next, include these scripts in your view:

@section scripts{
    <script>
        $(function () {
            var reportName = 'ReportName';
            var filterValues = [];

            filterValues.push({ 'Id': 0, 'Value': 'value1' });
            filterValues.push({ 'Id': 1, 'Value': 'value2' });
            filterValues.push({ 'Id': 2, 'Value': 'value3' });

            var model = JSON.stringify({ ReportName: reportName, FilterValues: filterValues});
            $.ajax({
                url: '/Home/ExportReport/',
                type: 'POST',
                contentType: "application/json",
                data:  model,
                success: function () {
                    alert('success');
                },
                error: function () {
                    alert('failure');
                }
            });
        });
    </script>
}

Answer 2

To work around the lack of support for ES2015 constructs like Map in JSON, we can create a custom class as shown below:

 public class ViewModel
    {
        public List<FilterValue> FilterValues { get; set; }
        public string ReportName { get; set; }
    }

    public class FilterValue
    {
        public int Id { get; set; }
        public string Value { get; set; }
    }

The post method will look something like this:

[HttpPost]
        public ActionResult ExportReport(ViewModel model)
        {
            var report = model.ReportName;
            var values = model.FilterValues;
            return new EmptyResult();
        }

Next, include these scripts in your view:

@section scripts{
    <script>
        $(function () {
            var reportName = 'ReportName';
            var filterValues = [];

            filterValues.push({ 'Id': 0, 'Value': 'value1' });
            filterValues.push({ 'Id': 1, 'Value': 'value2' });
            filterValues.push({ 'Id': 2, 'Value': 'value3' });

            var model = JSON.stringify({ ReportName: reportName, FilterValues: filterValues});
            $.ajax({
                url: '/Home/ExportReport/',
                type: 'POST',
                contentType: "application/json",
                data:  model,
                success: function () {
                    alert('success');
                },
                error: function () {
                    alert('failure');
                }
            });
        });
    </script>
}

Answer 3

Answer №2

When setting up your model in the MVC pattern, make sure to structure it like this:

        public class SpecialDataModel
        {
            public string nameOfReport { get; set; }
            public List<FilterItem> Filters { get; set; }
        }

        public class FilterItem
        {
            public int uniqueId { get; set; }
            public string filterValue { get; set; }
        }

Your controller method should be configured as follows:

        [HttpPost]
        public void GenerateReport(SpecialDataModel data)
        {



        }

Ensure that your AJAX request contains the necessary data setup:

var reportTitle = 'New Report';
var Filters = [];
Filters.push({'uniqueId': 0, 'filterValue': 'valueA'});
Filters.push({'uniqueId': 1, 'filterValue': 'valueB'});
Filters.push({'uniqueId': 2, 'filterValue': 'valueC'});

var modelData = JSON.stringify({ 'nameOfReport' : reportTitle, 'Filters' : Filters });

Answer 4

When setting up your model in the MVC pattern, make sure to structure it like this:

        public class SpecialDataModel
        {
            public string nameOfReport { get; set; }
            public List<FilterItem> Filters { get; set; }
        }

        public class FilterItem
        {
            public int uniqueId { get; set; }
            public string filterValue { get; set; }
        }

Your controller method should be configured as follows:

        [HttpPost]
        public void GenerateReport(SpecialDataModel data)
        {



        }

Ensure that your AJAX request contains the necessary data setup:

var reportTitle = 'New Report';
var Filters = [];
Filters.push({'uniqueId': 0, 'filterValue': 'valueA'});
Filters.push({'uniqueId': 1, 'filterValue': 'valueB'});
Filters.push({'uniqueId': 2, 'filterValue': 'valueC'});

var modelData = JSON.stringify({ 'nameOfReport' : reportTitle, 'Filters' : Filters });

Sending a JSON object as a map through AJAX to an MVC controller

Answer №1

Answer №2

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