C# HttpWebRequest调用WebAPI接口_c# httpwebrequest调用webapi接口传输对象序列化后字符串

//设置request参数(新建实体类)
HttpDataCenterSearchRequest requestData = new HttpDataCenterSearchRequest();
requestData.clientId = clientId;
requestData.currentPage = 0;
requestData.signature = StrResult;
requestData.sql = sql;
requestData.timestamp = timestamp;
//将实体类序列化
var requestJson = JsonConvert.SerializeObject(requestData);
 
//调用WebApi
var res = PostUrl(url, requestJson);
if (!string.IsNullOrEmpty(res))
{
    //将返回的res进行反序列化(得到实体类)
	var response = JsonConvert.DeserializeObject<HttpDataCenterSearchResponse>(res);
    if (response != null)
    {
        //赋值
    }
}
 
//调用WebApi请求类
public string PostUrl(string url, string postData)
{
	try
	{
		HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
		//跳过证书校验(调用https请求时使用)
		req.ServerCertificateValidationCallback = (_s, _x509s, _x509c, _ssl) => { return (true); };
		req.Method = "POST";
		//req.Timeout = 800;//设置请求超时时间，单位为毫秒
		req.ContentType = "application/json";
		byte[] data = Encoding.UTF8.GetBytes(postData);
		req.ContentLength = data.Length;
 
		using (Stream reqStream = req.GetRequestStream())
		{
			reqStream.Write(data, 0, data.Length);
			reqStream.Close();
		}
 
		HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
		Stream stream = resp.GetResponseStream();
 
		//获取响应内容
		string result = "";
		using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
		{
			result = reader.ReadToEnd();
		}
		return result;
	}
	catch (Exception ex)
	{
		MessageBox.Show("WebApi接口调用失败：" + ex.Message);
		return "";
	}
}