Byte[]、Image、Bitmap 之间的相互转换

最新推荐文章于 2024-10-23 13:19:00 发布

原创最新推荐文章于 2024-10-23 13:19:00 发布 · 526 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#C# #byte[] #Image #Bitmap

C# 专栏收录该内容

17 篇文章

订阅专栏

本文详细介绍了如何在C#中实现图片与字节流的相互转换，包括Image到Byte[]、Byte[]到Image、Image到Bitmap及Bitmap到Image的转换方法，并提供了具体的代码实现。

        /// <summary>
        /// 将图片Image转换成Byte[]
        /// </summary>
        /// <param name="Image">image对象</param>
        /// <param name="imageFormat">后缀名</param>
        /// <returns></returns>
        public static byte[] ImageToBytes(Image Image, System.Drawing.Imaging.ImageFormat imageFormat)
        {

if (Image == null) { return null; }

byte[] data = http://www.cnblogs.com/peasana/archive/2012/02/13/null;

using (MemoryStream ms= new MemoryStream())
{

using (Bitmap Bitmap = new Bitmap(Image))
{

Bitmap.Save(ms, imageFormat);

ms.Position = 0;

data = http://www.cnblogs.com/peasana/archive/2012/02/13/new byte[ms.Length];

ms.Read(data, 0, Convert.ToInt32(ms.Length));

ms.Flush();

}

return data;

}

        /// <summary>
        /// byte[]转换成Image
        /// </summary>
        /// <param name="byteArrayIn">二进制图片流</param>
        /// <returns>Image</returns>
        public static System.Drawing.Image byteArrayToImage(byte[] byteArrayIn)
        {
            if (byteArrayIn == null)
                return null;
            using (System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArrayIn))
            {
                System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms);
                ms.Flush();
                return returnImage;
            }
        }

//Image转换Bitmap

1. Bitmap img = new Bitmap(imgSelect.Image);

2. Bitmap bmp = (Bitmap)pictureBox1.Image;

//Bitmap转换成Image

using System.IO;

        private static System.Windows.Controls.Image Bitmap2Image(System.Drawing.Bitmap Bi)
        {
            MemoryStream ms = new MemoryStream();
            Bi.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            BitmapImage bImage = new BitmapImage();
            bImage.BeginInit();
            bImage.StreamSource = new MemoryStream(ms.ToArray());
            bImage.EndInit();
            ms.Dispose();
            Bi.Dispose();
            System.Windows.Controls.Image i = new System.Windows.Controls.Image();
            i.Source = bImage;
            return i ;
        }

        //byte[] 转换 Bitmap
        public static Bitmap BytesToBitmap(byte[] Bytes)
        {
            MemoryStream stream = null;
            try
            {
                stream = new MemoryStream(Bytes);
                return new Bitmap((Image)new Bitmap(stream));
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
            catch (ArgumentException ex)
            {
                throw ex;
            }
            finally
            {
                stream.Close();
            }
        }

        //Bitmap转byte[]
        public static byte[] BitmapToBytes(Bitmap Bitmap)
        {
            MemoryStream ms = null;
            try
            {
                ms = new MemoryStream();
                Bitmap.Save(ms, Bitmap.RawFormat);
                byte[] byteImage = new Byte[ms.Length];
                byteImage = ms.ToArray();
                return byteImage;
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
            finally
            {
                ms.Close();
            }
        }