C#高级编程 - 小鸟系列之常用方法

这里汇总下C#的常用方法，后续会不断更新

序列化

添加引用Newtonsoft.Json.dll

public static string JSONSerializeObject(object oObject){    return JsonConvert.SerializeObject(oObject);}

反序列化

添加引用Newtonsoft.Json.dll

public static object JSONDeserializeObject<T>(string value){    return JsonConvert.DeserializeObject<T>(value, new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore });}

获取时间戳

public static long getTimeStamp(this DateTime dt){    var start = new DateTime(1970, 1, 1, 0, 0, 0, dt.Kind);    return Convert.ToInt64((dt - start).TotalSeconds);}

将DataTable转换成对象(List<T>)

public static List<T> toList<T>(this DataTable dt) where T : class, new(){    List<T> oList = new List<T>();    Type type = typeof(T);    string tempName = string.Empty;    foreach (DataRow dr in dt.Rows)    {        T t = new T();        PropertyInfo[] propertys = t.GetType().GetProperties();        foreach (PropertyInfo pi in propertys)        {            tempName = pi.Name;            if (dt.Columns.Contains(tempName))            {                if (!pi.CanWrite) continue;                object value = dr[tempName];                if (value != DBNull.Value)                    pi.SetValue(t, value, null);            }        }        oList.Add(t);    }    return oList;}

调用: 

List<Persion> _persion = dtList.toList<Persion>();

SHA1加密

public static string EncryptToSHA1(string str){    SHA1 sha1 = new SHA1CryptoServiceProvider();    byte[] bytes_sha1_in = UTF8Encoding.Default.GetBytes(str);    byte[] bytes_sha1_out = sha1.ComputeHash(bytes_sha1_in);    string str_sha1_out = BitConverter.ToString(bytes_sha1_out);    str_sha1_out = str_sha1_out.Replace("-", "");    return str_sha1_out;}

SHA512加密

public static string EncryptToSHA512(string str){    var sha = new SHA512Managed();    var bytes = Encoding.UTF8.GetBytes(str);    var encryptedBytes = sha.ComputeHash(bytes);    var encryptedInput = BitConverter.ToString(encryptedBytes);    encryptedInput = encryptedInput.Replace("-", "");    return encryptedInput;}

模拟Http发送Post或Get请求

public static string SendRequest(string requestUrl, string data, string contentType = "application/json", string requestMethod = WebRequestMethods.Http.Post, int connectionLimit = 100){    HttpWebRequest httpWebRequest = null;    string returnData = "";    try    {        httpWebRequest = (HttpWebRequest)WebRequest.Create(requestUrl);        httpWebRequest.Method = requestMethod;        httpWebRequest.ContentType = "application/json; charset=utf-8";        httpWebRequest.Proxy = null;        httpWebRequest.KeepAlive = false;        httpWebRequest.Timeout = 1000 * 25;        httpWebRequest.Headers.Add("Origin", "SIS API");        httpWebRequest.ServicePoint.ConnectionLimit = connectionLimit;        httpWebRequest.ServicePoint.UseNagleAlgorithm = false;        httpWebRequest.ServicePoint.ConnectionLimit = 100;        httpWebRequest.AllowWriteStreamBuffering = false;        httpWebRequest.Accept = "application/json";        byte[] dataArray = Encoding.UTF8.GetBytes(data);        httpWebRequest.ContentLength = dataArray.Length;        using (Stream requestStream = httpWebRequest.GetRequestStream())        {            requestStream.Write(dataArray, 0, dataArray.Length);            HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();            StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());            returnData = streamReader.ReadToEnd();            streamReader.Close();            httpWebResponse.Close();        }        httpWebRequest.Abort();    }    catch (Exception ex)    {        throw ex;    }    finally    {        if (httpWebRequest != null)        {            httpWebRequest.Abort();            httpWebRequest = null;        }    }    return returnData;}