相关疑难解决方法(0)

public static async Task<string> GetData(string url, string data)
{
    UriBuilder fullUri = new UriBuilder(url);

    if (!string.IsNullOrEmpty(data))
        fullUri.Query = data;

    HttpClient client = new HttpClient();

    HttpResponseMessage response = await client.PostAsync(new Uri(url), /*expects HttpContent*/);

    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
    response.EnsureSuccessStatusCode();
    string responseBody = await response.Content.ReadAsStringAsync();

    return responseBody;
}

将PostAsync采取一个需要另一个参数HttpContent.

我该如何设置HttpContent？任何适用于Windows Phone 8的文档都没有.

如果我这样做GetAsync,那就太棒了!但它需要POST的内容为key ="bla",某事="yay"

//编辑

非常感谢答案......这很有效,但这里还有一些不确定的地方:

    public static async Task<string> GetData(string url, string data)
    {
        data = "test=something";

        HttpClient client = new HttpClient();
        StringContent queryString …

如何使用C#和HttpClient创建以下POST请求:

我需要这样的WEB API服务请求:

[ActionName("exist")]
[System.Web.Mvc.HttpPost]
public bool CheckIfUserExist([FromBody] string login)
{           
    bool result = _membershipProvider.CheckIfExist(login);
    return result;
}

我们有这个方法:

async Task<int> AccessTheWebAsync()
{ 
    HttpClient client = new HttpClient();

   Task<string> getStringTask = client.GetStringAsync("http://msdn.microsoft.com");

   // You can do work here that doesn't rely on the string from GetStringAsync.
   DoIndependentWork();

   string urlContents = await getStringTask;
   //The thing is that this returns an int to a method that has a return type of Task<int>
   return urlContents.Length;
}

之间是否隐式转换发生Task<int>和int？如果没有,那么发生了什么？它是如何实现的？

我有来自Nuget的这个 HttpClient.

当我想获取数据时,我这样做:

var response = await httpClient.GetAsync(url);
var data = await response.Content.ReadAsStringAsync();

但问题是我不知道如何发布数据？我必须发送一个帖子请求并在其中发送这些值:comment="hello world"和questionId = 1.这些可以是一个类的属性,我不知道.

更新我不知道如何将这些值添加到HttpContentpost方法需要它.httClient.Post(string, HttpContent);

如何传入JSON有效内容以使用REST服务.

这是我正在尝试的:

var requestUrl = "http://example.org";

using (var client = new HttpClient())
{
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualifiedHeaderValue("application/json"));
    var result = client.Post(requestUrl);

    var content = result.Content.ReadAsString();
    dynamic value = JsonValue.Parse(content);

    string msg = String.Format("{0} {1}", value.SomeTest, value.AnotherTest);

    return msg;
}

如何将这样的内容作为参数传递给请求？:

{"SomeProp1":"abc","AnotherProp1":"123","NextProp2":"zyx"}

在这里，我试图从服务中获取数据：

public async Task<IHttpActionResult> ValidateSesion()
{
    var values = new Dictionary<string, string>{
        { "productId", "1" },
        { "productKey", "Abc6666" },
        { "userName", "OPPO" },
    };
    var json = JsonConvert.SerializeObject(values, Formatting.Indented);
    // var content = new FormUrlEncodedContent(json);
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    var response = await client.PostAsync("http://172.116.12.172:8014/iadmin/validate", json);
    var responseString = await response.Content.ReadAsStringAsync();
    return Ok(responseString);
}

如果我进行任何 PostMan 调用，如下所示，我得到的数据如下所示：

{
    "productId": "1",
    "productKey": "Abc6666" 
}