图片转二进制/字符串二进制/字符串反转成图片代码,C#代码库,德仔网

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【C#】图片转二进制/字符串二进制/字符串反转成图片

作者:amandag / 发布于2018/1/26/ 761

protected void Button1_Click(object sender, EventArgs e)  
{  
    //图片转二进制  
    byte[] imageByte = GetPictureData(Server.MapPath("./uploadfile/111.png"));  
    //二进制转换成字符串  
    string picStr = Convert.ToBase64String(imageByte);  
    //输出字符串  
    Response.Write(picStr);  
    //字符串转二进制  
    byte[] imageBytes = Convert.FromBase64String(picStr);  
    //读入MemoryStream对象  
    MemoryStream memoryStream = new MemoryStream(imageBytes, 0, imageBytes.Length);  
    memoryStream.Write(imageBytes, 0, imageBytes.Length);  
    //二进制转成图片保存  
    System.Drawing.Image image = System.Drawing.Image.FromStream(memoryStream);  
    image.Save(Server.MapPath("./uploadfile/222.png"));  
}  
  
/// <summary>  
/// 二进制流转图片  
/// </summary>  
/// <param name="streamByte">二进制流</param>  
/// <returns>图片</returns>  
public System.Drawing.Image ReturnPhoto(byte[] streamByte)  
{  
    System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);  
    System.Drawing.Image img = System.Drawing.Image.FromStream(ms);  
    return img;  
}  
  
/// <summary>  
/// 图片转二进制  
/// </summary>  
/// <param name="imagepath">图片地址</param>  
/// <returns>二进制</returns>  
public byte[] GetPictureData(string imagepath)  
{  
    //根据图片文件的路径使用文件流打开，并保存为byte[]   
    FileStream fs = new FileStream(imagepath, FileMode.Open);//可以是其他重载方法   
    byte[] byData = new byte[fs.Length];  
    fs.Read(byData, 0, byData.Length);  
    fs.Close();  
    return byData;  
}  
  
/// <summary>  
/// 图片转二进制  
/// </summary>  
/// <param name="imgPhoto">图片对象</param>  
/// <returns>二进制</returns>  
public byte[] PhotoImageInsert(System.Drawing.Image imgPhoto)  
{  
    //将Image转换成流数据，并保存为byte[]   
    MemoryStream mstream = new MemoryStream();  
    imgPhoto.Save(mstream, System.Drawing.Imaging.ImageFormat.Bmp);  
    byte[] byData = new Byte[mstream.Length];  
    mstream.Position = 0;  
    mstream.Read(byData, 0, byData.Length);  
    mstream.Close();  
    return byData;  
}

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