用foreach异步方法 [英] Asynchronous method with foreach

问题描述

我有一些异步方法

 public static Task<JObject> GetUser(NameValueCollection parameters)
        {
            return CallMethodApi("users.get", parameters, CallType.HTTPS);
        }

和我下面写

public static IEnumerable<JObject> GetUsers(IEnumerable<string> usersUids, Field fields)
{
    foreach(string uid in usersUids)
    {
        var parameters = new NameValueCollection
                             {
                                 {"uids", uid},
                                 {"fields", FieldsUtils.ConvertFieldsToString(fields)}
                             };
        yield return GetUser(parameters).Result;
    }
}

这方法是异步的？如何使用Parallel.ForEach写？

This method is asynchronous? How to write this using Parallel.ForEach?

推荐答案

东西有点像这一点。

public static IEnumerable<JObject> GetUsers(IEnumerable<string> usersUids, Field fields)
{
    var results = new List<JObject>
    Parallel.ForEach(usersUids, uid => {
        var parameters = new NameValueCollection
                             {
                                 {"uids", uid},
                                 {"fields", FieldsUtils.ConvertFieldsToString(fields)}
                             };
        var user = GetUser(parameters).Result;
        lock(results)
            results.Add(user);
    });
    return results;
}

请注意：结果不会以相同的顺序，你希望

NOTE: The results won't be in the same order as you expect.

这篇关于用foreach异步方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！