保存位图到MemoryStream [英] Saving a bitmap into a MemoryStream

问题描述

我应该分配内存或存储流的只是对象：
这是OK？

Should I allocate the memory or just the object of the memory stream: Is this OK?

MemoryStream memoryStream = new MemoryStream();
bitmap.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Jpeg);

如果我需要定义MemoryStream的大小，如何从位图得到它？

If I need to define the MemoryStream size, how can I get it from Bitmap?

推荐答案

.NET是一个管理环境：具体而言，内存分配代表您的.NET运行时通常是管理。你通常不需要自己分配内存。

.NET is a managed environment: specifically, memory allocation is usually managed on your behalf by the .NET runtime. You don't typically need to allocate the memory yourself.

不过，有时你需要使用通知运行时，当你有记忆完成关闭（）或的Dispose（）。在使用语句可用于包装资源，如的MemoryStream 来告诉大家，内存可以被回收的运行时间。

Sometimes, however, you do need to inform the runtime when you've finished with memory by using Close() or Dispose(). The using statement can be used to wrap a resource such as MemoryStream to tell the runtime that the memory can be reclaimed.

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