包含通过httpclient发起get或post请求的方法，所有调用微信接口的操作都通过此类。话不多说，直接上代码：
2014-10-31代码更新：微信SSL安全策略调整，关闭掉SSLv2、SSLv3版本支持，不再支持部分使用SSLv2、 SSLv3或更低版本的客户端调用。
public class HttpClientHelper { /// /// get请求 /// /// /// 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(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 t = response.Content.ReadAsStringAsync(); string s = t.Result; result = JsonConvert.DeserializeObject(s); } return result; } /// /// post请求 /// /// /// post数据 /// 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; } /// /// 发起post请求 /// /// /// url /// post数据 /// public static T PostResponse(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 t = response.Content.ReadAsStringAsync(); string s = t.Result; result = JsonConvert.DeserializeObject(s); } return result; } /// /// V3接口全部为Xml形式，故有此方法 /// /// /// /// /// public static T PostXmlResponse(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 t = response.Content.ReadAsStringAsync(); string s = t.Result; result = XmlDeserialize(s); } return result; } /// /// 反序列化Xml /// /// /// /// public static T XmlDeserialize(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发生异常：xmlString:" + xmlString + "异常信息：" + ex.Message); } } }
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