Stream 和 byte[] 之间的转换

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一. 二进制转换成图片

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.

System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();

byte[] inputBytes =converter.GetBytes(inputString);

string inputString = converter.GetString(inputBytes);

2.

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

/// 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

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

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[]

                Bitmap BitReturn = new Bitmap();

                byte[] bReturn = null;

                MemoryStream ms = new MemoryStream();

                BitReturn.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

                bReturn = ms.GetBuffer();