C# 以 30 个为一组拆分数组，然后调用 api

Question

我想寻求有关循环的帮助。

我的方法接收一个带有姓名和电子邮件地址的 JSON 字符串，它使用这个对象字符串传递给外部 API POST 请求。

我刚刚发现 API 一次只能处理 30 个项目，否则无法验证。

我想学习如何检查json字符串是否包含超过30个项目，如果是，则在调用api时一次处理30个项目。是否有可能获得该循环的示例？

我的方法目前执行以下步骤：

public ActionResult CreatePanelists(Parameters data)
{
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

    var webId = data.webId;
    var jwt_token = JWTToken.GetJWTToken();
    var panelists = JsonConvert.SerializeObject(data.panelists);   <- this is the array
    var client = new RestClient($"https://api/{webId}/panelists");
    var request = new RestRequest(Method.POST);

    request.AddHeader("content-type", "application/json");
    request.AddHeader("authorization", $"Bearer {jwt_token}");
    request.AddParameter("application/json", $"{{\"panelists\": {panelists}}}", ParameterType.RequestBody);
    IRestResponse response = client.Execute(request);

    return new JsonResult { Data = new { status = response.StatusCode, message = response.Content} };

}

任何帮助都会很棒。

非常感谢。

更新

我添加了示例代码，发现一些错误：

'index': a parameter or local variable cannot have the same name as a method type parameter

Syntax error, '=>' expected

Invalid expression term ')'

'item': a parameter or local variable cannot have the same name as a method type parameter

更新2

return 部分现在在抱怨，response 在循环中，return 无法访问

The name response does not exists in the current context.

return new JsonResult { Data = new { status = response.StatusCode, message = response.Content} };

UPDATE3

public ActionResult CreatePanelists(Parameters data)
{
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

    var results = new List<string>();
    var webId = data.webId;
    var jwt_token = JWTToken.GetJWTToken();
    
    var batches = data.panelists
        .Select((item, index) => new { item, index })
        .GroupBy(t => t.index / 30)
        .Select(g => g.Select(t => t.item))
        .Select(batch => JsonConvert.SerializeObject(batch));

    foreach (var batch in batches)
    {
        var client = new RestClient($"https://api/meetings/{webId}/panelists");
        var request = new RestRequest(Method.POST);

        request.AddHeader("content-type", "application/json");
        request.AddHeader("authorization", $"Bearer {jwt_token}");
        request.AddParameter("application/json", $"{{\"panelists\": {batch}}}", ParameterType.RequestBody);
        IRestResponse response = client.Execute(request);
        string JSON = JsonConvert.SerializeObject(response);
        
        results.AddItem(JSON);
    }

    return new JsonResult { Data = results };

添加项目：

    public static void AddItem<T>(this List<T> list, T item)
    {
        if (!list.Contains(item))
        {
            list.Add(item);
        }
    }

如果您对如何改进代码有任何建议，请告诉我

Answer 1

例如，您可以使用 LINQ：

var batches = data.panelists
    .Select((item, index) => (item, index))
    .GroupBy(t => t.index/30)
    .Select(g => g.Select(t => t.item))
    .Select(batch => JsonConvert.SerializeObject(batch));

foreach (var batch in batches)
{
    var request = new RestRequest(Method.POST);
    request.AddHeader("content-type", "application/json");
    request.AddHeader("authorization", $"Bearer {jwt_token}");
    request.AddParameter("application/json", $"{{\"panelists\": {batch}}}", ParameterType.RequestBody);
    IRestResponse response = client.Execute(request); // somehow process/join the result
}