标签:installer UI 分配 类库 void mat 语法 line 来源
原文地址
如果你是一个C#程序员,那么本文介绍的10个C#常用代码片段一定会给你带来帮助,从底层的资源操作,到上层的UI应用,这些代码也许能给你的开发节省不少时间。以下是原文:
1 OperatingSystem os = System.Environment.OSVersion; 2 Console.WriteLine(“Platform: {0}”, os.Platform); 3 Console.WriteLine(“Service Pack: {0}”, os.ServicePack); 4 Console.WriteLine(“Version: {0}”, os.Version); 5 Console.WriteLine(“VersionString: {0}”, os.VersionString); 6 Console.WriteLine(“CLR Version: {0}”, System.Environment.Version);
在我的Windows 7系统中,输出以下信息:
Platform: Win32NT Service Pack: Version: 6.1.7600.0 VersionString: Microsoft Windows NT 6.1.7600.0 CLR Version: 4.0.21006.1
可以通过Windows Management Instrumentation (WMI)提供的接口读取所需要的信息。
1 private static UInt32 CountPhysicalProcessors() 2 { 3 ManagementObjectSearcher objects = new ManagementObjectSearcher( 4 “SELECT * FROM Win32_ComputerSystem”); 5 ManagementObjectCollection coll = objects.Get(); 6 foreach(ManagementObject obj in coll) 7 { 8 return (UInt32)obj[“NumberOfProcessors”]; 9 } 10 return 0; 11 } 12 private static UInt64 CountPhysicalMemory() 13 { 14 ManagementObjectSearcher objects =new ManagementObjectSearcher( 15 “SELECT * FROM Win32_PhysicalMemory”); 16 ManagementObjectCollection coll = objects.Get(); 17 UInt64 total = 0; 18 foreach (ManagementObject obj in coll) 19 { 20 total += (UInt64)obj[“Capacity”]; 21 } 22 return total; 23 }
请添加对程序集System.Management的引用,确保代码可以正确编译。
1 Console.WriteLine(“Machine: {0}”, Environment.MachineName); 2 Console.WriteLine(“# of processors (logical): {0}”, Environment.ProcessorCount); 3 Console.WriteLine(“# of processors (physical): {0}” CountPhysicalProcessors()); 4 Console.WriteLine(“RAM installed: {0:N0} bytes”, CountPhysicalMemory()); 5 Console.WriteLine(“Is OS 64-bit? {0}”, Environment.Is64BitOperatingSystem); 6 Console.WriteLine(“Is process 64-bit? {0}”, Environment.Is64BitProcess); 7 Console.WriteLine(“Little-endian: {0}”, BitConverter.IsLittleEndian); 8 foreach (Screen screen in System.Windows.Forms.Screen.AllScreens) 9 { 10 Console.WriteLine(“Screen {0}”, screen.DeviceName); 11 Console.WriteLine(“\tPrimary {0}”, screen.Primary); 12 Console.WriteLine(“\tBounds: {0}”, screen.Bounds); 13 Console.WriteLine(“\tWorking Area: {0}”,screen.WorkingArea); 14 Console.WriteLine(“\tBitsPerPixel: {0}”,screen.BitsPerPixel); 15 }
// 请添加命名空间Microsoft.Win32,以确保上面的代码可以编译。
1 using (RegistryKey keyRun = Registry.LocalMachine.OpenSubKey(@”Software\Microsoft\Windows\CurrentVersion\Run”)) 2 { 3 foreach (string valueName in keyRun.GetValueNames()) 4 { 5 Console.WriteLine(“Name: {0}\tValue: {1}”, valueName, keyRun.GetValue(valueName)); 6 } 7 }
这项API提供的实用功能常常用来管理应用程序中的服务,而不必到控制面板的管理服务中进行操作。
1 ServiceController controller = new ServiceController(“e-M-POWER”); 2 controller.Start(); 3 if (controller.CanPauseAndContinue) 4 { 5 controller.Pause(); 6 controller.Continue(); 7 } 8 controller.Stop();
.net提供的API中,可以实现一句话安装与卸载服务
// 如代码所示,给应用程序传入i或u参数,以表示是卸载或是安装程序。
1 if (args[0] == "/i") 2 { 3 ManagedInstallerClass.InstallHelper(new string[] { Assembly.GetExecutingAssembly().Location }); 4 } 5 else if (args[0] == "/u") 6 { 7 ManagedInstallerClass.InstallHelper(new string[] { "/u", Assembly.GetExecutingAssembly().Location }); 8
比如在程序中,为了验证程序集是否有签名,可调用如下方法:
1 [DllImport("mscoree.dll", CharSet=CharSet.Unicode)] 2 static extern bool StrongNameSignatureVerificationEx(string wszFilePath, bool fForceVerification, ref bool pfWasVerified); 3 4 bool notForced = false; 5 bool verified = StrongNameSignatureVerificationEx(assembly, false, ref notForced); 6 Console.WriteLine("Verified: {0}\nForced: {1}", verified, !notForced);
这个功能常用在软件保护方法,可用来验证签名的组件。即使你的签名被人去掉,或是所有程序集的签名都被去除,只要程序中有这一项调用代码,则可以停止程序运行。
比如我们锁定系统后,如果QQ没有退出,则它会显示了忙碌状态。
请添加命名空间Microsoft.Win32,然后对注册下面的事件。
. DisplaySettingsChanged (包含Changing) 显示设置
. InstalledFontsChanged 字体变化
. PaletteChanged
. PowerModeChanged 电源状态
. SessionEnded (用户正在登出或是会话结束)
. SessionSwitch (变更当前用户)
. TimeChanged 时间改变
. UserPreferenceChanged (用户偏号 包含Changing)
我们的ERP系统,会监测系统时间是否改变,如果将时间调整后ERP许可文件之外的范围,会导致ERP软件不可用。
Windows7系统引入一些新特性,比如打开文件对话框,状态栏可显示当前任务的进度。
1 Microsoft.WindowsAPICodePack.Dialogs.CommonOpenFileDialog ofd =new Microsoft.WindowsAPICodePack.Dialogs.CommonOpenFileDialog(); 2 ofd.AddToMostRecentlyUsedList = true; 3 ofd.IsFolderPicker = true; 4 ofd.AllowNonFileSystemItems = true; 5 ofd.ShowDialog();
用这样的方法打开对话框,与BCL自带类库中的OpenFileDialog功能更多一些。不过只限于Windows 7系统中,所以要调用这段代码,还要检查操作系统的版本要大于6,并且添加对程序集Windows API Code Pack for Microsoft?.NET Framework的引用,请到这个地址下载 http://code.msdn.microsoft.com/WindowsAPICodePack
用下面的方法,可以检查.NET给程序分配的内存数量:
1 long available = GC.GetTotalMemory(false); 2 Console.WriteLine(“Before allocations: {0:N0}”, available); 3 int allocSize = 40000000; 4 byte[] bigArray = new byte[allocSize]; 5 available = GC.GetTotalMemory(false); 6 Console.WriteLine(“After allocations: {0:N0}”, available);
在我的系统中,它运行的结果如下所示:
Before allocations: 651,064 After allocations: 40,690,080
使用下面的方法,可以检查当前应用程序占用的内存:
1 Process proc = Process.GetCurrentProcess(); 2 Console.WriteLine(“Process Info: “+Environment.NewLine+ 3 “Private Memory Size: {0:N0}”+Environment.NewLine + 4 “Virtual Memory Size: {1:N0}” + Environment.NewLine + 5 “Working Set Size: {2:N0}” + Environment.NewLine + 6 “Paged Memory Size: {3:N0}” + Environment.NewLine + 7 “Paged System Memory Size: {4:N0}” + Environment.NewLine + 8 “Non-paged System Memory Size: {5:N0}” + Environment.NewLine, 9 proc.PrivateMemorySize64, proc.VirtualMemorySize64, proc.WorkingSet64, proc.PagedMemorySize64, proc.PagedSystemMemorySize64, proc.NonpagedSystemMemorySize64 );
如果你担忧某些代码非常耗费时间,可以用StopWatch来检查这段代码消耗的时间,如下面的代码所示:
1 System.Diagnostics.Stopwatch timer = new System.Diagnostics.Stopwatch(); 2 timer.Start(); 3 Decimal total = 0; 4 int limit = 1000000; 5 for (int i = 0; i < limit; ++i) 6 { 7 total = total + (Decimal)Math.Sqrt(i); 8 } 9 timer.Stop(); 10 Console.WriteLine(“Sum of sqrts: {0}”,total); 11 Console.WriteLine(“Elapsed milliseconds: {0}”, 12 timer.ElapsedMilliseconds); 13 Console.WriteLine(“Elapsed time: {0}”, timer.Elapsed);
现在已经有专门的工具来检测程序的运行时间,可以细化到每个方法,比如dotNetPerformance软件。
以上面的代码为例子,您需要直接修改源代码,如果是用来测试程序,则有些不方便。请参考下面的例子。
1 class AutoStopwatch : System.Diagnostics.Stopwatch, IDisposable 2 { 3 public AutoStopwatch() 4 { 5 Start(); 6 } 7 public void Dispose() 8 { 9 Stop(); 10 Console.WriteLine(“Elapsed: {0}”, this.Elapsed); 11 } 12 }
借助于using语法,像下面的代码所示,可以检查一段代码的运行时间,并打印在控制台上。
1 using (new AutoStopwatch()) 2 { 3 Decimal total2 = 0; 4 int limit2 = 1000000; 5 for (int i = 0; i < limit2; ++i) 6 { 7 total2 = total2 + (Decimal)Math.Sqrt(i); 8 } 9 }
当程序正在后台运行保存或是册除操作时,应当将光标状态修改为忙碌。可使用下面的技巧。
1 class AutoWaitCursor : IDisposable 2 { 3 private Control _target; 4 private Cursor _prevCursor = Cursors.Default; 5 public AutoWaitCursor(Control control) 6 { 7 if (control == null) 8 { 9 throw new ArgumentNullException(“control”); 10 } 11 _target = control; 12 _prevCursor = _target.Cursor; 13 _target.Cursor = Cursors.WaitCursor; 14 } 15 public void Dispose() 16 { 17 _target.Cursor = _prevCursor; 18 } 19 }
用法如下所示,这个写法,是为了预料到程序可能会抛出异常:
1 using (new AutoWaitCursor(this)) 2 { 3 ... 4 throw new Exception(); 5 }
如代码所示,即使抛出异常,光标也可以恢复到之间的状态。
转载来源
http://blog.csdn.net/honantic/article/details/49337857
标签:installer UI 分配 类库 void mat 语法 line 来源
原文地址:http://www.cnblogs.com/swfpt/p/6846993.html