async POST 方法 C# '': 并非所有代码路径 return 一个值

Question

因为我正在收听很多 POST 请求，所以我正在尝试使用类似于 Promise 的方法进行异步处理。

问题是它需要 "getDataLead" 任务之外的 return 值（在这种情况下取消注释 return "good2" 部分）。

有什么想法可以让 POST 方法等待并 return 异步 "matchLogic" 函数的响应吗？

   [HttpPost]
    public async Task<string> Post([FromForm]string id)
    {          
        String filterType = "id";             
        string filterValues = id;            

        int batchSize = 50;//max 300, default 300
        String[] fields = { "email", "country", "city", "address", "postalCode", "phone", "company", "billingCountry", "billingCity", "billingPostalCode", "billingStreet", "mainPhone", "website" };//array of field names to retrieve
        String nextPageToken = "";//paging token

        Task<string> tr = await getDataLead(filterType, filterValues, batchSize, fields, nextPageToken).ContinueWith((t1) =>
            {

                if (t1.Exception == null)
                {
                    getLeadsByFilterTypeRootObject data = JsonConvert.DeserializeObject<getLeadsByFilterTypeRootObject>(t1.Result);
                    if (data.success == true)
                    {
                        if (data.result.Count < 2)
                        {
                            return matchLogic(data.result[0]);                            
                        }
                        else
                        {
                            return Task.FromResult("not good");
                        }
                    }
                    else
                    {

                        return Task.FromResult("not good");
                    }
                }
                else
                {
                    return Task.FromResult("not good");
                }  
            });         

        //   return "good2";

    }

谢谢

Answer 1

[HttpPost]
    public async Task<string> Post([FromForm]string id)
    {          
        String filterType = "id";             
        string filterValues = id;
        Task<string> result = string.Empty;            

        int batchSize = 50;//max 300, default 300
        String[] fields = { "email", "country", "city", "address", "postalCode", "phone", "company", "billingCountry", "billingCity", "billingPostalCode", "billingStreet", "mainPhone", "website" };//array of field names to retrieve
        String nextPageToken = "";//paging token

        Task<string> tr = await getDataLead(filterType, filterValues, batchSize, fields, nextPageToken).ContinueWith((t1) =>
            {

                if (t1.Exception == null)
                {
                    getLeadsByFilterTypeRootObject data = JsonConvert.DeserializeObject<getLeadsByFilterTypeRootObject>(t1.Result);
                    if (data.success == true)
                    {
                        if (data.result.Count < 2)
                        {
                            result = matchLogic(data.result[0]);                            
                        }
                        else
                        {
                            result = Task.FromResult("not good");
                        }
                    }
                    else
                    {

                        result = Task.FromResult("not good");
                    }
                }
                else
                {
                    result = Task.FromResult("not good");
                }  
            });         

          return result;

    }

这应该会强制您的应用程序从异步内容中获取值。

async POST 方法 C# '': 并非所有代码路径 return 一个值

async POST method C# '': not all code paths return a value

c#

asynchronous

post

promise

continuewith