C#中二进制和流之间的各种相互转换

一. 二进制转换成图片间的转换

1
2
3
4
5
MemoryStream ms = new MemoryStream(bytes);
ms.Position = 0;
Image img = Image.FromStream(ms);
ms.Close();
this.pictureBox1.Image

二. C#中byte[]与string的转换代码

1.

1
2
3
System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();
  byte[] inputBytes =converter.GetBytes(inputString);
  string inputString = converter.GetString(inputBytes);

2.

1
2
3
string inputString = System.Convert.ToBase64String(inputBytes);
  byte[] inputBytes = System.Convert.FromBase64String(inputString);
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);

三. C# Stream 和 byte[] 之间的转换

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
/// 将 Stream 转成 byte[]
  
public byte[] StreamToBytes(Stream stream)
{
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 设置当前流的位置为流的开始
    stream.Seek(0, SeekOrigin.Begin);
    return bytes;
}
  
/// 将 byte[] 转成 Stream
  
public Stream BytesToStream(byte[] bytes)
{
    Stream stream = new MemoryStream(bytes);
    return stream;
}

四. Stream 和 文件之间的转换

将 Stream 写入文件

1
2
3
4
5
6
7
8
9
10
11
12
13
14
public void StreamToFile(Stream stream,string fileName)
{
    // 把 Stream 转换成 byte[]
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 设置当前流的位置为流的开始
    stream.Seek(0, SeekOrigin.Begin);
    // 把 byte[] 写入文件
    FileStream fs = new FileStream(fileName, FileMode.Create);
    BinaryWriter bw = new BinaryWriter(fs);
    bw.Write(bytes);
    bw.Close();
    fs.Close();
}

五. 从文件读取 Stream

1
2
3
4
5
6
7
8
9
10
11
12
13
14
public Stream FileToStream(string fileName)
{            
    // 打开文件
    FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
    // 读取文件的 byte[]
    byte[] bytes = new byte[fileStream.Length];
    fileStream.Read(bytes, 0, bytes.Length);
    fileStream.Close();
    // 把 byte[] 转换成 Stream
    Stream stream = new MemoryStream(bytes);
    return stream;
  
  
}

六Bitmap 转化为 Byte[] 

1
2
3
4
5
6
//Bitmap 转化为 Byte[]
                Bitmap BitReturn = new Bitmap();
                byte[] bReturn = null;
                MemoryStream ms = new MemoryStream();
                BitReturn.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                bReturn = ms.GetBuffer();
posted @ 2017-01-14 14:30  iQingHan  阅读(1407)  评论(0编辑  收藏  举报