C# FileStream实现大文件拷贝_c# 分包拷贝大文件

private static void BigFileCopy(string source, string target)
{
    using (FileStream fsRead = File.OpenRead(source))
    {
        using (FileStream fsWrite = File.OpenWrite(target))
        {
            byte[] bytes = new byte[5 * 1024 * 1024];//定义5M空间
            int count = 0;
            while ((count = fsRead.Read(bytes, 0, bytes.Length)) > 0)
            {
                fsWrite.Write(bytes, 0, count);
                //fsRead.Position 表示已经读取的字节个数
                double per = (fsRead.Position / (double)fsRead.Length) * 100;
                Console.WriteLine($"{per:0.00}%");
            }
        }
    }
}
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