包含透過HttpClient發(fā)起get或post請求的方法，所有呼叫微信介面的操作都經(jīng)由此類。話不多說，直接上程式碼：

2014-10-31程式碼更新：微信SSL安全策略調(diào)整，關(guān)掉掉SSLv2、SSLv3版本支持，不再支援部分使用SSLv2、 SSLv3或更低版本的客戶端調(diào)用。

public?class?HttpClientHelper
????{
????????///?<summary>
????????///?get請求
????????///?</summary>
????????///?<param name="url"></param>
????????///?<returns></returns>
????????public?static?string?GetResponse(string?url)
????????{
????????????if?(url.StartsWith("https"))
????????????????System.Net.ServicePointManager.SecurityProtocol?=?SecurityProtocolType.Tls;

????????????HttpClient?httpClient?=?new?HttpClient();
????????????httpClient.DefaultRequestHeaders.Accept.Add(
???????????????new?MediaTypeWithQualityHeaderValue("application/json"));
????????????HttpResponseMessage?response?=?httpClient.GetAsync(url).Result;

????????????if?(response.IsSuccessStatusCode)
????????????{
????????????????string?result?=?response.Content.ReadAsStringAsync().Result;
????????????????return?result;
????????????}
????????????return?null;
????????}

????????public?static?T?GetResponse<T>(string?url)
????????????where?T?:?class,new()
????????{
????????????if?(url.StartsWith("https"))
????????????????System.Net.ServicePointManager.SecurityProtocol?=?SecurityProtocolType.Tls;

????????????HttpClient?httpClient?=?new?HttpClient();
????????????httpClient.DefaultRequestHeaders.Accept.Add(
???????????????new?MediaTypeWithQualityHeaderValue("application/json"));
????????????HttpResponseMessage?response?=?httpClient.GetAsync(url).Result;

????????????T?result?=?default(T);

????????????if?(response.IsSuccessStatusCode)
????????????{
????????????????Task<string>?t?=?response.Content.ReadAsStringAsync();
????????????????string?s?=?t.Result;

????????????????result?=?JsonConvert.DeserializeObject<T>(s);
????????????}
????????????return?result;
????????}

????????///?<summary>
????????///?post請求
????????///?</summary>
????????///?<param name="url"></param>
????????///?<param name="postData">post數(shù)據(jù)</param>
????????///?<returns></returns>
????????public?static?string?PostResponse(string?url,?string?postData)
????????{
????????????if?(url.StartsWith("https"))
????????????????System.Net.ServicePointManager.SecurityProtocol?=?SecurityProtocolType.Tls;

????????????HttpContent?httpContent?=?new?StringContent(postData);
????????????httpContent.Headers.ContentType?=?new?MediaTypeHeaderValue("application/json");
????????????HttpClient?httpClient?=?new?HttpClient();

????????????HttpResponseMessage?response?=?httpClient.PostAsync(url,?httpContent).Result;

????????????if?(response.IsSuccessStatusCode)
????????????{
????????????????string?result?=?response.Content.ReadAsStringAsync().Result;
????????????????return?result;
????????????}
????????????return?null;
????????}

????????///?<summary>
????????///?發(fā)起post請求
????????///?</summary>
????????///?<typeparam name="T"></typeparam>
????????///?<param name="url">url</param>
????????///?<param name="postData">post數(shù)據(jù)</param>
????????///?<returns></returns>
????????public?static?T?PostResponse<T>(string?url,?string?postData)
????????????where?T?:?class,new()
????????{
????????????if?(url.StartsWith("https"))
????????????????System.Net.ServicePointManager.SecurityProtocol?=?SecurityProtocolType.Tls;

????????????HttpContent?httpContent?=?new?StringContent(postData);
????????????httpContent.Headers.ContentType?=?new?MediaTypeHeaderValue("application/json");
????????????HttpClient?httpClient?=?new?HttpClient();

????????????T?result?=?default(T);

????????????HttpResponseMessage?response?=?httpClient.PostAsync(url,?httpContent).Result;

????????????if?(response.IsSuccessStatusCode)
????????????{
????????????????Task<string>?t?=?response.Content.ReadAsStringAsync();
????????????????string?s?=?t.Result;

????????????????result?=?JsonConvert.DeserializeObject<T>(s);
????????????}
????????????return?result;
????????}

????????///?<summary>
????????///?V3接口全部為Xml形式，故有此方法
????????///?</summary>
????????///?<typeparam name="T"></typeparam>
????????///?<param name="url"></param>
????????///?<param name="xmlString"></param>
????????///?<returns></returns>
????????public?static?T?PostXmlResponse<T>(string?url,?string?xmlString)
????????????where?T?:?class,new()
????????{
????????????if?(url.StartsWith("https"))
????????????????System.Net.ServicePointManager.SecurityProtocol?=?SecurityProtocolType.Tls;

????????????HttpContent?httpContent?=?new?StringContent(xmlString);
????????????httpContent.Headers.ContentType?=?new?MediaTypeHeaderValue("application/json");
????????????HttpClient?httpClient?=?new?HttpClient();

????????????T?result?=?default(T);

????????????HttpResponseMessage?response?=?httpClient.PostAsync(url,?httpContent).Result;

????????????if?(response.IsSuccessStatusCode)
????????????{
????????????????Task<string>?t?=?response.Content.ReadAsStringAsync();
????????????????string?s?=?t.Result;

????????????????result?=?XmlDeserialize<T>(s);
????????????}
????????????return?result;
????????}

????????///?<summary>
????????///?反序列化Xml
????????///?</summary>
????????///?<typeparam name="T"></typeparam>
????????///?<param name="xmlString"></param>
????????///?<returns></returns>
????????public?static?T?XmlDeserialize<T>(string?xmlString)?
????????????where?T?:?class,new?()
????????{
????????????try
????????????{
????????????????XmlSerializer?ser?=?new?XmlSerializer(typeof(T));
????????????????using?(StringReader?reader?=?new?StringReader(xmlString))
????????????????{
????????????????????return?(T)ser.Deserialize(reader);
????????????????}
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????throw?new?Exception("XmlDeserialize發(fā)生異常：xmlString:"?+?xmlString?+?"異常信息："?+?ex.Message);
????????????}

????????}
????}

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