apim policy to call and print it the value from json - azure

Question

I am facing challenges to print the value from json body in azure apim policy
{    "value": [        {            "counterKey": "abc123",            "periodKey": "0_86400",            "periodStartTime": "2023-02-10T00:00:00Z",            "periodEndTime": "2023-02-11T00:00:00Z",            "value": {                "callsCount": 4,                "kbTransferred": 0.36328125            }        }    ],    "count": 1,    "nextLink": null}
I want to print the "callsCount": 4, through api policy
<send-request ignore-error="true" timeout="20" response-variable-name="apref" mode="new">
<set-url>myurl</set-url>
<set-method>GET</set-method>
<set-header name="Authorization" exists-action="override">
<value>#("Bearer " + (string)context.Variables["PSItoken"])</value>
</set-header>
</send-request>
<set-header name="NumberOfCounts" exists-action="override">
<value>#{
var jsonBody = ((IResponse)context.Variables["apref"]).Body.As<JObject>()["value"].ToString();
JArray jBody = JArray.Parse(jsonBody);
return String.Join("", jBody.Select(i => i.ToString()));
}</value>
</set-header>
<set-variable name="NumberOfCounts" value="#(context.Request.Headers.GetValueOrDefault("NumberOfCounts"))" />
What exactly am i missing in my policy ?

Answer 1

Whenever printing api response use the response variable name and add return-response policy:
<return-response response-variable-name="apref">
<set-status code="200" reason="OK" />
<set-header name="Content-Type" exists-action="override">
<value>application/json</value></set-header>
<set-body>#{
var jsonBody = ((IResponse)context.Variables["apref"]).Body.As<JObject>()["value"].ToString();
JArray jBody = JArray.Parse(jsonBody);
return String.Join("", jBody.Select(i => i.ToString()));
}
</set-body>
</return-response>