C# 字符串string和内存流MemoryStream及比特数组byte[]之间相互转换

定义string变量为str,内存流变量为ms,比特数组为bt

1.字符串转比特数组

(1)byte[] bt=system.text.encoding.default.getbytes("字符串");
(2)byte[] bt=convert.frombase64string("字符串");

2.字符串转流

(1)memorystream ms=new memorystream(system.text.encoding.default.getbytes("字符串"));
(2)memorystream ms=new memorystream(convert.frombase64string("字符串"));

3.流转比特数组

(1)byte[] bt=ms.toarray();
(2)memorystream ms=new memorystream();ms.write(bt,0,ms.length);

4.流转字符串

(1)string str=convert.tobase64string(ms.toarray());
(2)string str=system.text.encoding.default.getstring(ms.toarray());

5.比特数组转字符串

(1)string str=system.text.encoding.default.getstring(bt);
(2)string str=convert.tobase64string(bt);

6.比特数组转流

(1)memorystream ms=new memorystream(bt);
(2)memorystream ms=new memorystream();ms.read(bt,0,bt.length);

总结：可以看出byte[]在字符串string和流memorystream之间转换起到过渡的作用，string和memorystream转换都要先转换成byte[]。