There is no need to wrap the array in another object with a data property. The array by itself is valid JSON:

post_params = JSON.stringify([ { 'name' : 'Alice', 'age' : 15 },
                               { 'name' : 'Bob',   'age' : 20 },
                                  ...
                             ]);
post(url, post_params);

Just make sure your API expects this array as well.

In JavaScript / JSON arrays are 0 based indexed data structures. What you are using here is more like a Map:

var jsonArray = [];
jsonArray["company_name"]=company_name ;

In JavaScript you cannot use arrays like this (well you can, but it is probably not what you want). For a data structure like a map that maps strings to objects rather then an index to objects, just use an object.

Or in short: Use var jsonArray = {}; rather than var jsonArray = []; The {} will create an object that you can assign properties to like you did. And JSON.stringify will correctly translate this into a JSON string like this:

{ "property": value, "otherProperty", otherValue }

You need to suffix your variable name with [] like this:

If that doesn't work, try not putting indexes in brackets:

my_array[]  value1
my_array[]  value2

Note:

• If you are using the postman packaged app, you can send an array by selecting raw / json (instead of form-data). Also, make sure to set Content-Type as application/json in Headers tab. Here is example for raw data {"user_ids": ["123" "233"]}, don't forget the quotes!

• If you are using the postman REST client you have to use the method I described above because passing data as raw (json) won't work. There is a bug in the postman REST client (At least I get the bug when I use 0.8.4.6).

Hi @baylf2000,

If you want to receive multiple missions, you can just add List in your parameter,

public async Task> PostMission(List mission)
{
}

Demo:

Here I send json array in request body:

Then I can receive json array in my action:

If you receive data from form, you don't need to add [FromBody] attribute before your parameter like what I post in gif.

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Best regards,

Xinran Shen

I'm assuming you're making a POST request with a JSON payload. First, you want to make sure your payload is formatted JSON correctly, use: http://pro.jsonlint.com/

Secondly, you can send the payload using JSON.stringify and you will want to set the contentType:

data: JSON.stringify(data), contentType: "application/json; charset=utf-8"

If you run this and look at your network tab in Dev Tools in Chrome, it will error out, but you will at least see the payload formatted to send to the server: http://prntscr.com/f8hf6s

var data = [{
    "key": "myKey",
    "keyName": "myKeyName",
    "value": "value",
    "valueName": "valueName"
  },
  {
    "key": "mySecondKey",
    "keyName": "mySecondKeyName",
    "value": "secondValue",
    "valueName": "secondValueName"
  }
];

var url = "http://swapi.co/api/";

$.ajax({
  type: "POST",
  url: url,
  data: JSON.stringify(data),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  error: function() {
    alert("Error");
  },
  success: function() {
    alert("OK");
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

The problem your having is this string is NOT Proper JSON: [500,'hello world']

this would be proper JSON [500,"hello world"]. JSON is very strict on formatting and requires that all string values be wrapped in double quotes and NEVER single quotes.

the proper thing to do to avoid problems, would be to use the php functions json_encode() and json_decode()

for example,

<?php
    $myarray[] = 500;
    $myarray[] = "hello world";
    $myjson = json_encode($myarray);
?>
<form name="input" action="post.php">
    <input type="hidden" name="json" value="<?php echo $myjson ?>" />
    <input type="submit" value="Submit">
</form>

and in the post.php you would read it like so,

<?php
    $posted_data = array();
    if (!empty($_POST['json'])) {
        $posted_data = json_decode($_POST['json'], true);
    }
    print_r($posted_data);
?>

the true flag in json_decode() tells the function you want it as an associative array and not a PHP object, which is its default behavior.

the print_r() function will output the php structure of the converted JSON array:

Array(
    [0] => 500
    [1] => hello world
) 

-----------------------------------test.Order.java-----------------------------------

package test;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Order {

@SerializedName("product_id")
@Expose
private String productId;
@SerializedName("qty")
@Expose
private String qty;
@SerializedName("price")
@Expose
private String price;
@SerializedName("total")
@Expose
private String total;
@SerializedName("product_name")
@Expose
private String productName;

public String getProductId() {
return productId;
}

public void setProductId(String productId) {
this.productId = productId;
}

public String getQty() {
return qty;
}

public void setQty(String qty) {
this.qty = qty;
}

public String getPrice() {
return price;
}

public void setPrice(String price) {
this.price = price;
}

public String getTotal() {
return total;
}

public void setTotal(String total) {
this.total = total;
}

public String getProductName() {
return productName;
}

public void setProductName(String productName) {
this.productName = productName;
}

}
-----------------------------------test.TestClass.java-----------------------------------

package test;

import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class TestClass {

@SerializedName("user_id")
@Expose
private String userId;
@SerializedName("username")
@Expose
private String username;
@SerializedName("order")
@Expose
private List<Order> order = null;

public String getUserId() {
return userId;
}

public void setUserId(String userId) {
this.userId = userId;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public List<Order> getOrder() {
return order;
}

public void setOrder(List<Order> order) {
this.order = order;
}

}

Use this two Class.Load data to this class. And use GSON Library.

Gson gson= new GSON();
String requiredJson= gson.toJson(testClassObject);