計算處理時間

Question

我正在使用C＃/ .NET 1.1;我如何計算處理時間，例如將文件從1系統複製到另一個系統？

Answer 1

System.Diagnostics.Stopwatch

Stopwatch sw = new Stopwatch(); 
sw.Start(); 
CopyFile(); 
sw.Stop(); 
Console.WriteLine("Elapsed : {0}", sw.Elapsed) 

這可類不能在.NET 1.1，而是可以使用QueryPerformanceCounter和QueryPerformanceFrequency API

[DllImport("kernel32.dll", SetLastError=true)] 
public static extern bool QueryPerformanceCounter(out long lpPerformanceCount); 

[DllImport("kernel32.dll", SetLastError=true)] 
public static extern bool QueryPerformanceFrequency(out long lpFrequency); 

... 

long start; 
long end; 
long freq; 
QueryPerformanceCounter(out start); 
CopyFile(); 
QueryPerformanceCounter(out end); 
QueryPerformanceFrequency(out freq); 
double seconds = (double)(end - start)/freq; 
Console.WriteLine("Elapsed : {0} seconds", seconds)