csharp25
发表于
2016-09-17 11:52:53

[原]C# 计算MD5哈希字符串

public static string CalculateMD5Hash(string input) { // step 1, calculate MD5 hash from input var md5 = MD5.Create(); byte[] inputBytes = Encoding.ASCII.GetBytes(input); byte[] hash = md5.ComputeHash(inputBytes); // step 2, convert byte array to hex string var sb = new StringBuilder(); for (int i = 0; i < hash.Length; i++) { sb.Append(hash[i].ToString("X2")); } return sb.ToString(); } ...继续阅读 (15)

csharp25
发表于
2016-09-17 11:52:03

[原]C# 已知经纬度计算两点距离函数

public Task<double> GetDistance(double lat1, double lon1, double lat2, double lon2) { int R = 6371; double rLat1 = ToRadian(lat1); double rLat2 = ToRadian(lat2); double dLat = rLat2 - rLat1; double dLon = ToRadian(lon2 - lon1); double a = Math.Pow(Math.Sin(dLat / 2), 2) + Math.Pow(Math.Sin(dLon / 2), 2) * Math.Cos(rLat1) * Math.Cos(rLat2); double b = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a)); return Task.FromResult((R * b)); } ...继续阅读 (22)

csharp25
发表于
2016-09-17 11:47:52

[原]C# 国际手机号类封装 - 使用nuget Global Phone 解析国际手机号

1. package-install GlobalPhone2. Phone.cs public class Phone { public string CountryCode { get; set; } public string InternationalNumber { get; set; } public string NationalNumber { get; set; } public string Territory { get; set; } public bool IsValid { get; set; } public Phone() { } private Phone(global::GlobalPhone.Number number) : this() { CountryCode = number.CountryCode; InternationalNumber = number.InternationalString; NationalNumber ...继续阅读 (11)

csharp25
发表于
2016-09-16 11:20:17

[原]C# 解耦EntityFramework进行单元测试

1. 首先EF的Repository需要抽象的行为提到接口中。例如：public interface IXXXContext : IDisposable { IXXXContext NewInstance(); // db sets DbSet<AAABBB> aaa { get; set; } ... // common Database Database { get; } DbContextConfiguration Configuration { get; } int SaveChanges(); Task<int> SaveChangesAsync(); // store pros ... IStorePro1 StorePro1 { get; } ... }然后就可以使用DataContext和TestDataContext实现这个接口。其中TestDataContext是在UT中使用的，DataContext是自动生成的。TestDataContext还需要以下几个类进行模拟。 public class TestDbSet<TEntity> : DbSet<TEntity>, IQ ...继续阅读 (31)

csharp25
发表于
2016-09-16 11:08:01

[原]C# 使用AD(Active Directory)验证内网用户名密码

1. 连到内网，找到AD的domain地址nslookup set types=all_ldap._tcp2. 验证AD的函数public bool ADLogin(string userName, string password) { // sample : // LDAP://xxx.com string domain = System.Configuration.ConfigurationManager.AppSettings["AD_Domain"]; try { DirectoryEntry entry = new DirectoryEntry(domain, userName, password); object obj = entry.NativeObject; DirectorySearcher search = new DirectorySearcher(entry); search.Filter = string.Format("(SAM ...继续阅读 (19)

csharp25
发表于
2016-09-16 11:06:32

[原]C# 一些获取硬件参数的方法

private static string GetIdentifier(string wmiClass, string wmiProperty, string wmiMustBeTrue) { string result = ""; System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass); System.Management.ManagementObjectCollection moc = mc.GetInstances(); foreach (System.Management.ManagementObject mo in moc) { if (mo[wmiMustBeTrue].ToString() == "True") { //Only get the first one if (result == "") ...继续阅读 (18)

csharp25
发表于
2016-09-16 11:05:02

[原]C# SHA256 hash helper

public class SHAHelper { public static string HashStringSHA2(params string[] inputString) { string val = inputString.Aggregate("", (current, s) => current + s); return HashString(val, "SHA256"); } public static string HashString(string inputString, string hashName) { HashAlgorithm algorithm = HashAlgorithm.Create(hashName); if (algorithm == null) { throw new ArgumentException("Unrecognized hash name", "hashName"); ...继续阅读 (26)

csharp25
发表于
2016-09-16 11:02:53

[原]ASP.NET MVC中使用邮件模板的两种方式

I 使用Formatwith nuget解析出object的属性值1. install package FormatWith2. Add a View to check the result@model string @{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>Home</title> </head> <body> <div> @Model </div> </body> </html>3. Controllerpublic ActionResult FormatWithTest() { string emailContent = "{CurrentTime} - {Name}".FormatWith( new { Current ...继续阅读 (19)

csharp25
发表于
2016-09-10 19:44:12

[原]Android - 使用Timer+Handler定时跨线程访问UI控件

示例：final Runnable updateTitleRunnable = new Runnable() { public void run() { // udpate UI controls updateActionbarText(); } }; public Handler updateTitleHandler = new Handler() ; private void updateOnlineStatus() { Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { String url = getString(R.string.baseurl2)+"Ping.ashx"; String rst = UtilHttp.doHttpGet(m_context, url); if(rst == null){ m_onlineStatu ...继续阅读 (22)

csharp25
发表于
2016-09-10 19:43:18

[原]Android - 比较日期的时间部分

1. get current time // current time Calendar now = Calendar.getInstance(); int hour = now.get(Calendar.HOUR); int minute = now.get(Calendar.MINUTE); SimpleDateFormat sdf = new SimpleDateFormat("HH:mm"); Date nowTime = sdf.parse(hour + ":" + minute); 2.get time to compare // time to compare private Date toTime(String name){ try{ String timeStr = name.split("-")[1]; SimpleDateFormat sdf = new SimpleDateFormat("HH:mm" ...继续阅读 (17)

csharp25
发表于
2016-08-21 23:08:09

[原]Android - usage of TextWatcher

Android - usage of TextWatcherfinalTextView textMsg = (TextView) findViewById(R.id.textviewTicketNo); TextWatcher textWatcher =newTextWatcher() {@OverridepublicvoidbeforeTextChanged(CharSequence charSequence,inti,inti1,inti2) { textMsg.setText("Processing..."); }@OverridepublicvoidonTextChanged(CharSequence charSequence,inti,inti1,inti2) { }@OverridepublicvoidafterTextChanged(Editable editable) {// get text value from textbox (txtScanningInfo)// start processing when detect certain char ('\n')} }; txtScanningInfo.addTextChangedListener(textWatcher); ...继续阅读 (23)

csharp25
发表于
2016-08-21 23:07:28

[原]Android - Start new Activity & Pass value

Android - Start new Activity & Pass valueIntent i =newIntent(MyActivity.this, HomeActivity.class); i.putExtra("username", NAME); startActivity(i); ...继续阅读 (13)

csharp25
发表于
2016-08-21 23:06:28

[原]Android - some basic control & resource operations

Android - some basic control & resource operationsget control by resource id(Button)findViewById(R.id.btnMtFaberLine);download populationdropdownDirection = (Spinner)findViewById(R.id.spinnerWelcome);String[] items =newString[]{"Entry","Exit"}; ArrayAdapter<String> adapter =newArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, items); dropdownDirection.setAdapter(adapter);set textview text and boldTextView textViewUserName = (TextView)findViewById(R.id.usernameTV);textViewUserName.setTypeface(null, Typeface.BOLD);textViewUserName.setText("User: "+ usernam ...继续阅读 (13)

csharp25
发表于
2016-08-21 23:04:35

[原]Android - processing & processed message

Android - processing & processed messageprocessing dialogProgressDialog pd; // do something async //...pd = ProgressDialog.show(m_context, null,"Processing, please wait ...”); // processing done pd.dismiss();processed messageToast.makeText(getApplicationContext(),"Processed", Toast.LENGTH_SHORT).show(); ...继续阅读 (5)

csharp25
发表于
2016-08-21 23:01:59

[原]Android - Pass value through SharedPreferences

Android - Pass value through SharedPreferences//setSharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref",0);SharedPreferences.Editoreditor = pref.edit();editor.putString("user_name",NAME);editor.commit();//get SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref",0);String username = pref.getString("user_name", null); ...继续阅读 (5)

csharp25
发表于
2016-08-21 23:01:23

[原]Android - local storage & UserTable sample

Android - local storage & UserTable samplepublicclassUserTableDataAccessextendsSQLiteOpenHelper{publicstaticfinalintDATABASE_VERSION =1;publicString CREATE_QUERY ="CREATE TABLE "+ DataTables.UserTable.TABLE_NAME+"("+ DataTables.UserTable.COLUMN_USER_NAME +" TEXT, "+ DataTables.UserTable.COLUMN_PASSWORD +" TEXT);";publicUserTableDataAccess(Context context) {super(context, DataTables.UserTable.DATABASE_NAME,null, DATABASE_VERSION); Log.d("Database Operations","User table Created"); }@OverridepublicvoidonCreate(SQLiteDatabase sdb) { sdb.execSQL(CREATE_QUERY); Log.d ...继续阅读 (6)

csharp25
发表于
2016-08-21 23:00:25

[原]Android - HTTP util class SyncGET & SyncPOST

Android - HTTP util class SyncGET & SyncPOSTpublicclass UtilHttp {privatestatic finalStringTAG="UtilHttp";publicstaticStringerr;publicstaticStringdoHttpGet(Context ctx,StringserverUrl) {Log.v(TAG,"HTTPGET:"+serverUrl);Stringresult=null; err=null; HttpURLConnection conn=null; InputStreamin=null; try { int TIMEOUT_MILLISEC=15000; conn=(HttpURLConnection)newURL(serverUrl).openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(TIMEOUT_MILLISEC); conn.setReadTimeout(TIMEOUT_MILLISEC); ...继续阅读 (10)

csharp25
发表于
2016-08-21 22:58:10

[原]Android - dialog sample

Android - dialog samplebtnLogout.setOnClickListener(newView.OnClickListener() {@OverridepublicvoidonClick(View v) { AlertDialog.Builder alertDialog =newAlertDialog.Builder(HomeActivity.this); alertDialog.setTitle("Logout"); alertDialog.setMessage("Are you sure you want to Logout ?");/* When positive (yes/ok) is clicked */alertDialog.setPositiveButton("Yes",newDialogInterface.OnClickListener() {publicvoidonClick(DialogInterface dialog,intwhich) { Intent i =newIntent(HomeActivity.this, MyActivity.class); i.setFlags(Intent.FLAG_ACTIVITY_C ...继续阅读 (21)

csharp25
发表于
2016-08-21 22:57:10

[原]Android - async task sample

Android - async task sampleinherit from AsyncTask to create background job easilyprivateclassTicketValidation extends AsyncTask<String, Void, Boolean> {privateProgressDialog pd;privateString err;privateInteger status; @OverrideprotectedvoidonPreExecute() { pd = ProgressDialog.show(m_context,null,"Processing, please wait ..."); } @OverrideprotectedBooleandoInBackground(String...params) { boolean success =false;// HTTP process} @OverrideprotectedvoidonPostExecute(Boolean isOk) { pd.dismiss();// show result} } ...继续阅读 (14)

csharp25
发表于
2016-07-29 10:08:36

[原]Powershell获取并导出指定日期EventLog

1.以管理员身份运行power shell2.$date = Get-Date 28/07/16 Get-Log -After $date -Log "Application" | Export-CSV C:\application-log.csv ...继续阅读 (29)

csharp25
发表于
2016-07-23 10:32:19

[原]C# Winform跨线程设置button的visibility

privateboolIsShow =true;delegatevoidSetVisibilityCallback(boolshow);privatevoidSetVisibilityThreadSafe(boolshow){if(btnCancelUsage.InvokeRequired) { SetVisibilityCallback d = SetVisibilityThreadSafe; btnCancelUsage.Invoke(d, show); }else{ btnCancelUsage.Visible = IsShow; } } ...继续阅读 (27)

csharp25
发表于
2016-07-22 12:30:29

[原]C# 读COM PORT

C# 读COM PORT参照了MSDN的示例：https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx还是不工作，需要加这一行代码：mySerialPort.DtrEnable =true;DtrEnable属性的描述：Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication.demo代码：publicclassCOMPortListener{privatestaticILog logger = LogManager.GetLogger(typeof(COMPortListener));#regionsingle instanceprivateCOMPortListener(){ }staticCOMPortListener(){ }privatestaticCOMPortListener _instance =newCOMPortListener();publicstaticCOMPortListener Instance {get{return_instance; } }#endregionpublicAct ...继续阅读 (53)

csharp25
发表于
2016-07-14 18:09:23

[原]Sql server Group by 统计数量 order by时间

1. 创建临时表tmpcreate table #Tmp ( Field1 nvarchar(60), Field2 nvarchar(60), Field3 nvarchar(60), FieldCount int, CreatedAt int )Field1,2,3表示用于分组的列；FieldCount记录每组个数，CreatedAt对应记录时间，一条记录对应一个时间2. 将记录分组，插入到临时表insert #Tmp select t.Field1, t.Field2, t.Field3, count(*) FieldCount, min(CreatedAt) from Table_X t (nolock) where ... group by t.Field1, t.Field2, t.Field33. 查询，以CreatedAt排序select * from #Tmp order by CreatedAt ...继续阅读 (34)

csharp25
发表于
2016-07-13 15:59:25

[原]C# Sqlite 本地存储

1. download sqlite dll from:http://www.sqlite.org/download.htmlwindows 版本:http://www.sqlite.org/2016/sqlite-dll-win32-x86-3130000.zip2. 拷贝 sqlite3.dll 到 bin 目录3. 安装nuget： Install-Package sqlite-net安装后会在项目中找到SQLite.CS和SQLiteAsync.cs4. demo 代码：4.1 创建一个抽象的base model ：public abstract class BaseModel { [PrimaryKey] public Guid Id { get; set; } protected BaseModel() { Id = Guid.NewGuid(); } }4.2 测试modelpublic class Book : BaseModel { public Book() { } public Book(string title, string author ...继续阅读 (40)

csharp25
发表于
2016-07-02 15:14:27

[原]机器学习 -- 决策树C45算法使用实例

测试数据：//############################### data table ########################## // Outlook Temp Humidity Windy Play Golf // Rainy Hot High False No // Overoast Hot High True No // Sunny Mild High False Yes // Sunny Cool Normal False Yes // Sunny Cool Normal True No // Overoast Cool Normal True Yes // Rainy Mild High False No // Rainy Cool Normal False Yes // Sunny Mild Normal False Yes // Rainy Mild Normal True Yes // Overoast Mild High True Yes // Overoast Hot Normal False Yes // Sunny Mild High True No //###################### ...继续阅读 (30)

csharp25
发表于
2016-07-02 15:13:00

[原]机器学习 -- 决策树根节点的选择过程

csharp25
发表于
2016-06-16 17:42:30

[原]C# UDP收发请求工具类

初始化：ListeningPort = int.Parse(ConfigurationManager.AppSettings["ListeningPort"]); SendingPort = int.Parse(ConfigurationManager.AppSettings["SendingPort"]); SendingIp = ConfigurationManager.AppSettings["SendingIp"];监听：public static void Listen() { Task.Run(() => { var done = false; var listener = new UdpClient(ListeningPort); var groupEP = new IPEndPoint(IPAddress.Any, ListeningPort); string received_data; byte[] receive_byte_array; try ...继续阅读 (41)

csharp25
发表于
2016-06-08 15:22:13

[原]机器学习--SVM分类器

SVM分类器的介绍：https://en.wikipedia.org/wiki/Support_vector_machine在本例中，调用的accrod-net来实现，使用的SMO算法，主要基于公式（拉格朗日的对偶形式）：Max(alpha[i], i∈[1,n]) - 1/2 * y[i]*y[j]*Kernal(x[i],x[j])*alpha[i]*alpha[j]其中,alpha[i]为拉格朗日乘子，对上式进行迭代，在符合KKT条件(https://en.wikipedia.org/wiki/Karush–Kuhn–Tucker_conditions)下，进行迭代。调整alpha[i]和alpha[j]，直到收敛。核函数Kernal(x[i],x[j])的作用是将数据提升维度，达到线性可分。实例代码： public static class SVMDEmo { public static void Execute() { double[][] inputs = { new double[] { 1, 3 }, //-1 new double[] { -1, 3 },//1 ...继续阅读 (53)

csharp25
发表于
2016-06-03 12:39:50

[原]机器学习--朴素贝叶斯的分析与实现

贝叶斯定理：p(a|b) = p(b|a)*p(a)/p(b)假设：时间a，b相互独立。由于朴素贝叶斯基于贝叶斯定理，因此，在应用贝叶斯分类器时，所选的特征也应当是不相关的。例：训练数据：四维向量数组，共15个元素。inputs ={ new int[] { 0, 1, 1, 0 }, // c=0 new int[] { 0, 1, 0, 0 }, // c=0 new int[] { 0, 0, 1, 0 }, // c=0 new int[] { 0, 1, 1, 0 }, // c=0 new int[] { 0, 1, 0, 0 }, // c=0 new int[] { 1, 0, 0, 0 }, // c=1 new int[] { 1, 0, 0, 0 }, // c=1 new int[] { 1, 0, 0, 1 }, // c=1 new int[] { 0, 0, 0, 1 }, // c=1 new int[] { 0, 0, 0, 1 }, // c=1 new int[] { 1, 1, 1, 1 }, // c=2 new int[] { 1, 0, 1, 1 }, // c=2 new int[] { 1, 1, 0, ...继续阅读 (23)

csharp25
发表于
2016-06-03 10:50:01

[原]Win-Form - Customization Checkbox的大小

有时需要把checkbox的大小变大一些。可参照以下sample code自行调整为项目需要。实现代码：class MyCheckBox : CheckBox { public MyCheckBox() { this.TextAlign = ContentAlignment.MiddleRight; } public override bool AutoSize { get { return base.AutoSize; } set { base.AutoSize = false; } } protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); int h = this.ClientSize.Height - 2; Rectangle rc = new Rectangle(new Point(0, 1), new Size(h, h)); ControlPaint.DrawCheckBox(e.Grap ...继续阅读 (48)