c# - 使用 WebClient 调用具有复杂对象参数的 WebApi

Question

我需要使用 WebClient 调用 WebApi，其中必须传递一个对象作为参数。我的 WebApi 方法类似于以下代码:

示例 URI:localhost:8080/Api/DocRepoApi/PostDoc

[HttpPost]
public string PostDoc (DocRepoViewModel docRepo)
{
  return string.enpty;
}

然后 DocRepoViewModel 是:

public class DocRepoViewModel
{
    public string Roles { get; set; }
    public string CategoryName { get; set; }
    public List<AttachmentViewModel> AttachmentInfo { get; set; }
}

AttachmentViewModel 是:

public class AttachmentViewModel
{
    public string AttachmentName { get; set; }

    public byte[] AttachmentBytes { get; set; }

    public string AttachmentType { get; set; }
}

新 我需要从我的 MVC Controller (不是 javascript ajax)调用 PostDoc 方法。我如何传递这个特定的参数，我可以进行调用并在我的 WebApi 方法中获取所有数据。我们可以通过 WebClient 来实现吗？或者有更好的方法。请帮忙。

Answer 1

您可以使用 PostAsJsonAsync 方法，如下所示:

static async Task RunAsync()
{
    using (var client = new HttpClient())
    {
        client.BaseAddress = new Uri("localhost:8080/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        // HTTP POST
        var docViewModel = new DocRepoViewModel() { CategoryName = "Foo", Roles= "role1,role2" };
        var attachmentInfo = new List<AttachmentViewModel>() { AttachmentName = "Bar", AttachmentType = "Baz", AttachmentBytes = File.ReadAllBytes("c:\test.txt" };
        docViewModel.AttachmentInfo = attachmentInfo;
        response = await client.PostAsJsonAsync("DocRepoApi/PostDoc", docViewModel);
        if (response.IsSuccessStatusCode)
        {
          // do stuff
        }
    }
}

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