问题描述
就像在主题中一样:我想将文件(从流)中的数据读取到内存(内存流)中以提高我的应用程序速度.怎么做?
Like in the topic: I want to read data from a file (from stream) into memory (memorystream) to improve my app speed. How to do it?
推荐答案
几个选项:
先将其全部读入一个字节数组...
byte[] data = File.ReadAllBytes(file); MemoryStream stream = new MemoryStream(data);
或者使用 .NET 4 的 CopyTo 方法
MemoryStream memoryStream = new MemoryStream(); using (Stream input = File.OpenRead(file)) { input.CopyTo(memoryStream); } memoryStream.Position = 0;
或者手动操作
MemoryStream memoryStream = new MemoryStream(); using (Stream input = File.OpenRead(file)) { byte[] buffer = new byte[32 * 1024]; // 32K buffer for example int bytesRead; while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0) { memoryStream.Write(buffer, 0, bytesRead); } } memoryStream.Position = 0;