I don't understand how to sent this json in the request body. Here is the json from the postman create collection body (https://www.postman.com/postman/workspace/postman-public-workspace/request/12959542-049042b8-447f-4f71-8b79-ae978cf40a04):

{
    "collection": {
        "info": {
            "name": "Sample Collection 909",
            "description": "This is just a sample collection.",
            "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
        },
        "item": [
            {
                "name": "This is a folder",
                "item": [
                    {
                        "name": "Sample POST Request",
                        "request": {
                            "url": "https://postman-echo.com/post",
                            "method": "POST",
                            "header": [
                                {
                                    "key": "Content-Type",
                                    "value": "application/json"
                                }
                            ],
                            "body": {
                                "mode": "raw",
                                "raw": "{\"data\": \"123\"}"
                            },
                            "description": "This is a sample POST Request"
                        }
                    }
                ]
            },
            {
                "name": "Sample GET Request",
                "request": {
                    "url": "https://postman-echo/get",
                    "method": "GET",
                    "description": "This is a sample GET Request"
                }
            }
        ]
    }
}

Json above works fine using the Postman app, my attempt at it:

RestSharp.Settings.Init("collections", Method.Post);
RestSharp.Settings.AddHeader("X-Api-Key", "I hid my key");
RestSharp.Settings.restRequest.RequestFormat = DataFormat.Json;

RestSharp.Settings.restRequest.AddParameter("application/json; charset=utf-8", "{\n    \"collection\": {\n        \"info\": {\n            \"name\": \"Sample Collection 909\",\n            \"description\": \"This is just a sample collection.\",\n            \"schema\": \"https://schema.getpostman.com/json/collection/v2.1.0/collection.json\"\n        },\n        \"item\": [\n            {\n                \"name\": \"This is a folder\",\n                \"item\": [\n                    {\n                        \"name\": \"Sample POST Request\",\n                        \"request\": {\n                            \"url\": \"https://postman-echo.com/post\",\n                            \"method\": \"POST\",\n                            \"header\": [\n                                {\n                                    \"key\": \"Content-Type\",\n                                    \"value\": \"application/json\"\n                                }\n                            ],\n                            \"body\": {\n                                \"mode\": \"raw\",\n                                \"raw\": \"{\\\"data\\\": \\\"123\\\"}\"\n                            },\n                            \"description\": \"This is a sample POST Request\"\n                        }\n                    }\n                ]\n            },\n            {\n                \"name\": \"Sample GET Request\",\n                \"request\": {\n                    \"url\": \"https://postman-echo/get\",\n                    \"method\": \"GET\",\n                    \"description\": \"This is a sample GET Request\"\n                }\n            }\n        ]\n    }\n}",ParameterType.RequestBody);

var response = RestSharp.Settings.restClient.ExecuteAsync(RestSharp.Settings.restRequest).Result;

Console.WriteLine("Returned http status code is: "   response.StatusCode   " expected OK");

Assert.IsTrue((int)response.StatusCode == 200);

CodePudding user response：

Have a look at the RestSharp quick start guide. You can use AddJsonBody() to post Json. This is taken from that guide:

For example, you'd only need these lines to make a request with JSON body:

var request = new RestRequest("address/update").AddJsonBody(updatedAddress); 
var response = await client.PostAsync<AddressUpdateResponse>(request); 

AddJsonBody automatically sets the ContentType and DataFormat:

There is no need to set the Content-Type or add the DataFormat parameter to the request when using those methods, RestSharp will do it for you.

I'd recommend awaiting the response too, as in the example above, rather than using .Result.

CodePudding user response：

try this

var client = new RestClient("http://..");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", json,  ParameterType.RequestBody);
IRestResponse response =  await client.ExecuteAsync(request);
var jsonOutput=response.Content;