copying

问题 I am designing an image decoder and as a first step I tried to just copy the using c. i.e open the file, and write its contents to a new file. Below is the code that I used. while((c=getc(fp))!=EOF) fprintf(fp1,"%c",c); where fp is the source file and fp1 is the destination file. The program executes without any error, but the image file(".bmp") is not properly copied. I have observed that the size of the copied file is less and only 20% of the image is visible, all else is black. When I

问题 Is there any way to copy a really large file (from one server to another) in PowerShell AND display its progress? There are solutions out there to use Write-Progress in conjunction with looping to copy many files and display progress. However I can\'t seem to find anything that would show progress of a single file. Any thoughts? 回答1: I haven't heard about progress with Copy-Item . If you don't want to use any external tool, you can experiment with streams. The size of buffer varies, you may

问题 What is the best way to copy the contents of one stream to another? Is there a standard utility method for this? 回答1: From .NET 4.5 on, there is the Stream.CopyToAsync method input.CopyToAsync(output); This will return a Task that can be continued on when completed, like so: await input.CopyToAsync(output) // Code from here on will be run in a continuation. Note that depending on where the call to CopyToAsync is made, the code that follows may or may not continue on the same thread that