Sending KeyValuePair or IDictionary as payload to Web Api Controller using JavaScript

Question

Sending KeyValuePair or IDictionary as payload to Web Api Controller using JavaScript

In my web api controller, I am trying to post two parameters: a flat int ID and an IDictionary (or similar equivalent).

[HttpPost]
public void DoStuff(int id, [FromBody]IDictionary<int, int> things)
{
}

var things = new Array();
things.push({ 1: 10 });
things.push({ 2: 11 });
$.ajax({
    url: '/api/DoStuff?id=' + id,
    data: '=' + JSON.stringify(things),
    type: 'POST',
    dataType: 'json'
});

Despite multiple attempts with different ways of passing the data parameter (data: things, data: '=' + things), the Dictionary doesn't get passed correctly to the api controller. It shows up as null or with incorrect values ({0, 0}).

I also attempted to send the Dictionary in the Uri but was unsuccessful.

Any suggestions on how I can successfully pass the dictionary or key value pair to the api controller?

c#javascript ajax asp.net-web-api

Answer 1

Answer №1

If you're looking to avoid using an array and instead use a simple JS object (similar to a dictionary), you can achieve your goal with the following code snippet:

var items = {};
items['1'] = 10;
items['2'] = 11;
$.ajax({
    url: '/api/DoTask?id=' + id,
    data: JSON.stringify(items),
    contentType: 'application/json'
    type: 'POST',
    dataType: 'json'
});

Answer 2

If you're looking to avoid using an array and instead use a simple JS object (similar to a dictionary), you can achieve your goal with the following code snippet:

var items = {};
items['1'] = 10;
items['2'] = 11;
$.ajax({
    url: '/api/DoTask?id=' + id,
    data: JSON.stringify(items),
    contentType: 'application/json'
    type: 'POST',
    dataType: 'json'
});

Answer 3

Answer №2

Here is a solution that I found effective:

let configurations = [];
configurations.push({ parameter: "configuration01", setting: "Setting01" });
settings.push({ parameter: "configuration02", setting: "Setting02" });

Answer 4

Here is a solution that I found effective:

let configurations = [];
configurations.push({ parameter: "configuration01", setting: "Setting01" });
settings.push({ parameter: "configuration02", setting: "Setting02" });

Answer 5

Answer №3

Even though this is an old method, I once used JavaScript to create an object similar to @cesardaniel's approach:

var dictionary = [];
dictionary.push({ key: 1, value: [1,2,3,4,5] });
dictionary.push({ key: 2, value: [6,7,8,9,0] });

However, when working with .NET, my object shape was of the type

Dictionary<KeyValuePair<int, IEnumerable<int>>

. Thankfully, the web API was able to interpret it correctly. Hopefully, this information will be useful for any future readers!

Answer 6

Even though this is an old method, I once used JavaScript to create an object similar to @cesardaniel's approach:

var dictionary = [];
dictionary.push({ key: 1, value: [1,2,3,4,5] });
dictionary.push({ key: 2, value: [6,7,8,9,0] });

However, when working with .NET, my object shape was of the type

Dictionary<KeyValuePair<int, IEnumerable<int>>

. Thankfully, the web API was able to interpret it correctly. Hopefully, this information will be useful for any future readers!

Answer 7

Answer №4

When working with dictionaries, think of them as key-value pairs similar to an array. To properly send data, you can use the following syntax:


var data = {}
data['things[0].Key'] = x
data['things[0].Value'] = y
// etc

For JavaScript, your code should resemble something like this:


    var data = { };
    data['things[0].Key'] = 1;
    data['things[0].Value'] = 1;
    data['things[1].Key'] = 22;
    data['things[1].Value'] = 12;

    $.ajax({
        url: '/api/DoStuff?id=' + id,
        data: data,
        type: 'POST',
        dataType: 'json'
    });

The action on the server side should look similar to this:


    public ActionResult DoStuff(int id, Dictionary<int, int> things)
    {
        // ...
    }

Answer 8

When working with dictionaries, think of them as key-value pairs similar to an array. To properly send data, you can use the following syntax:


var data = {}
data['things[0].Key'] = x
data['things[0].Value'] = y
// etc

For JavaScript, your code should resemble something like this:


    var data = { };
    data['things[0].Key'] = 1;
    data['things[0].Value'] = 1;
    data['things[1].Key'] = 22;
    data['things[1].Value'] = 12;

    $.ajax({
        url: '/api/DoStuff?id=' + id,
        data: data,
        type: 'POST',
        dataType: 'json'
    });

The action on the server side should look similar to this:


    public ActionResult DoStuff(int id, Dictionary<int, int> things)
    {
        // ...
    }

Sending KeyValuePair or IDictionary as payload to Web Api Controller using JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

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