我应该如何在Windows Phone 7实施ExecuteAsync与RestSharp？(How

我试图使用文档的RestSharp GitHub的维基落实到我的REST API的服务电话，但我在遇到特别是ExecuteAsync方法的问题。

目前我的代码看起来像这样的API类：

public class HarooApi
{
    const string BaseUrl = "https://domain.here";

    readonly string _accountSid;
    readonly string _secretKey;

    public HarooApi(string accountSid, string secretKey)
    {
        _accountSid = accountSid;
        _secretKey = secretKey;
    }

    public T Execute<T>(RestRequest request) where T : new()
    {
        var client = new RestClient();
        client.BaseUrl = BaseUrl;
        client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
        request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment);
        client.ExecuteAsync<T>(request, (response) =>
        {
            return response.Data;
        });
    }
}

我知道这个从什么是GitHub的页面上稍微偏离，但我用这与WP7和相信的例子是C＃因此ExecuteAsync方法的使用。

我的问题是与ExecuteAsync命令应包含的内容。 我不能使用return response.Data因为我告诫：

'System.Action<RestSharp.RestResponse<T>,RestSharp.RestRequestAsyncHandle>' returns void, a return keyword must not be followed by an object expression

有没有人对如何解决这一问题的任何见解或可辅助教程？

Answer 1:

您的代码应该是这个样子：

public class HarooApi
{
    const string BaseUrl = "https://domain.here";

    readonly string _accountSid;
    readonly string _secretKey;

    public HarooApi(string accountSid, string secretKey)
    {
        _accountSid = accountSid;
        _secretKey = secretKey;
    }

    public void ExecuteAndGetContent(RestRequest request, Action<string> callback)
    {
        var client = new RestClient();
        client.BaseUrl = BaseUrl;
        client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
        request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment);
        client.ExecuteAsync(request, response =>
        {
            callback(response.Content);
        });
    }

    public void ExecuteAndGetMyClass(RestRequest request, Action<MyClass> callback)
    {
        var client = new RestClient();
        client.BaseUrl = BaseUrl;
        client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
        request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment);
        client.ExecuteAsync<MyClass>(request, (response) =>
        {
            callback(response.Data);
        });
    }
}

我加了两个方法，这样你就可以检查你想要什么（从响应主体，或在这里表示的反序列化类的字符串内容MyClass ）

Answer 2:

老问题，但如果你使用的是C＃5你可以通过创建resturns T的任务你的代码可能看起来像这样的TaskCompleteSource有一个通用的执行类：

public Task<T> ExecuteAsync<T>(RestRequest request) where T : new()
    {
        var client = new RestClient();
        var taskCompletionSource = new TaskCompletionSource<T>();
        client.BaseUrl = BaseUrl;
        client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
        request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment);
        client.ExecuteAsync<T>(request, (response) => taskCompletionSource.SetResult(response.Data));
        return taskCompletionSource.Task;
    }

并使用它像这样：

private async Task DoWork()
    {
        var api = new HarooApi("MyAcoountId", "MySecret");
        var request = new RestRequest();
        var myClass = await api.ExecuteAsync<MyClass>(request);

        // Do something with myClass
    }

Answer 3:

作为替代（或补充）的罚款答案通过Gusten 。 您可以使用ExecuteTaskAsync 。 这样，您就不能手动必须处理TaskCompletionSource 。 注意async签名中的关键字。

public async Task<T> ExecuteAsync<T>(RestRequest request) where T : new()
{
    var client = new RestClient();
    client.BaseUrl = BaseUrl;
    client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
    request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment);
    IRestResponse<T> response = await client.ExecuteTaskAsync<T>(request);
    return response.Data;
}

Answer 4:

或者更确切地说是这样的：

    public async Task<IRestResponse<T>> ExecuteAsync<T>(IRestRequest request) where T : class, new()
    {
        var client = new RestClient(_settingsViewModel.BaseUrl);

        var taskCompletionSource = new TaskCompletionSource<IRestResponse<T>>();
        client.ExecuteAsync<T>(request, restResponse =>
        {
            if (restResponse.ErrorException != null)
            {
                const string message = "Error retrieving response.";
                throw new ApplicationException(message, restResponse.ErrorException);
            }
            taskCompletionSource.SetResult(restResponse);
        });

        return await taskCompletionSource.Task;
    }

Answer 5:

下面做了工作

public async Task<IRestResponse<T>> ExecuteAsync<T>(IRestRequest request) where T : class, new()
{
    var client = new RestClient
    {
        BaseUrl = _baseUrl,
        Authenticator = new HttpBasicAuthenticator(_useraname, _password),
        Timeout = 3000,
    };

    var tcs = new TaskCompletionSource<T>();
    client.ExecuteAsync<T>(request, restResponse =>
    {
        if (restResponse.ErrorException != null)
        {
            const string message = "Error retrieving response.";
            throw new ApplicationException(message, restResponse.ErrorException);
        }
        tcs.SetResult(restResponse.Data);
    });

    return await tcs.Task as IRestResponse<T>;

}

文章来源: How should I implement ExecuteAsync with RestSharp on Windows Phone 7?