c# - ASP.Net Web API 返回数组值

Question

相当新的 ASP.Net WEB API。对于调用另一个 ASHX 服务的 API 调用，在正确的 API 配置(和返回类型)方面存在一些问题。

我有以下代码(在 HomeController 中测试只是为了验证服务调用是否有效):

public async Task<ActionResult> Index()
{
    WebRequest request = WebRequest.CreateHttp("http://callme/address.ashx");

    var response = await request.GetResponseAsync();
    string content;

    using (var stream = response.GetResponseStream())
    using(var reader = new StreamReader(stream))
    {
        content = await reader.ReadToEndAsync();
    }

    var result = JsonConvert.DeserializeObject<MyResult[]>(content);

    return this.View();            
}

public class MyResult
{
    public string ClientAddress { get; set; }
}

现在，尝试将其移植到 ASP.Net WEB API 调用:

ClientAddressController.cs

public class ClientAddressController: ApiController
{
  public async IQueryable<MyResult> GetClientAddress()
  {
    WebRequest request = WebRequest.CreateHttp("http://callme/address.ashx");

    var response = await request.GetResponseAsync();
    string content;

    using (var stream = response.GetResponseStream())
    using(var reader = new StreamReader(stream))
    {
        content = await reader.ReadToEndAsync();
    }

    var result = JsonConvert.DeserializeObject<MyResult[]>(content);

    // How to return the result object??
  }
}

public class MyResult
{
    public string ClientAddress { get; set; }
}

我需要一些帮助来正确定义 WEB Api 调用的正确参数，以便我可以返回结果对象。

结果对象只是一个字符串数组:

[{"Address": "Address 100"}, {"Address": "Address 200"}, {"Address": "300"}]

希望获得一些解决此问题的见解。我对在 Web API 中返回数据库查询有一些想法，但服务调用(和异步方法)有点让我偏离了轨道。

谢谢。

**更新*****

能够找到一些解决方案，我正在发布我的解决方案。

public class ClientAddressController: ApiController
{
  public async Task<IHttpActionResult> GetClientAddress()
  {
    WebRequest request = WebRequest.CreateHttp("http://callme/address.ashx");

    var response = await request.GetResponseAsync();
    string content;

    using (var stream = response.GetResponseStream())
    using(var reader = new StreamReader(stream))
    {
        content = await reader.ReadToEndAsync();
    }

    var result = JsonConvert.DeserializeObject<MyResult[]>(content);
    return Ok(result);

    // How to return the result object??
  }
}

public class MyResult
{
    public string ClientAddress { get; set; }
}

P.S.:我将接受@Stripling 的回答，因为他为我提供了一些指导。

Answer 1

您需要创建一个具有 Address 属性的类，并将结果映射到该类的对象:

public async IQueryable<ClientAddressResult> GetClientAddress()
{
    WebRequest request = WebRequest.CreateHttp("http://callme/address.ashx");

    var response = await request.GetResponseAsync();
    string content;

    using (var stream = response.GetResponseStream())
    using(var reader = new StreamReader(stream))
    {
        content = await reader.ReadToEndAsync();
    }

    IEnumerable<MyResult> result = JsonConvert.DeserializeObject<MyResult[]>(content);

    return result.Select(r => new ClientAddressResult{Address = r.ClientAddress})
        .AsQueryable();
}

DTO 类:

public class MyResult
{
    public string ClientAddress { get; set; }
}

public class ClientAddressResult
{
    public string Address { get; set; }
}