98 lines
3.1 KiB
C#
98 lines
3.1 KiB
C#
using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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namespace NetWorkHelper
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{
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public static class ImageHelper
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{
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/// <summary>
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/// Convert Image to Byte[]
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/// </summary>
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/// <param name="image"></param>
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/// <returns></returns>
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public static byte[] ImageToBytes(Image image)
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{
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ImageFormat format = image.RawFormat;
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using (MemoryStream ms = new MemoryStream())
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{
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if (format.Equals(ImageFormat.Jpeg))
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{
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image.Save(ms, ImageFormat.Jpeg);
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}
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else if (format.Equals(ImageFormat.Png))
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{
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image.Save(ms, ImageFormat.Png);
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}
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else if (format.Equals(ImageFormat.Bmp))
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{
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image.Save(ms, ImageFormat.Bmp);
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}
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else if (format.Equals(ImageFormat.Gif))
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{
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image.Save(ms, ImageFormat.Gif);
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}
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else if (format.Equals(ImageFormat.Icon))
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{
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image.Save(ms, ImageFormat.Icon);
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}
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byte[] buffer = new byte[ms.Length];
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//Image.Save()会改变MemoryStream的Position，需要重新Seek到Begin
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ms.Seek(0, SeekOrigin.Begin);
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ms.Read(buffer, 0, buffer.Length);
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return buffer;
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}
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}
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/// <summary>
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/// Convert Byte[] to Image
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/// </summary>
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/// <param name="buffer"></param>
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/// <returns></returns>
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public static Image BytesToImage(byte[] buffer)
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{
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MemoryStream ms = new MemoryStream(buffer);
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Image image = System.Drawing.Image.FromStream(ms);
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return image;
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}
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/// <summary>
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/// Convert Byte[] to a picture and Store it in file
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/// </summary>
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/// <param name="fileName"></param>
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/// <param name="buffer"></param>
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/// <returns></returns>
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public static string CreateImageFromBytes(string fileName, byte[] buffer)
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{
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string file = fileName;
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Image image = BytesToImage(buffer);
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ImageFormat format = image.RawFormat;
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if (format.Equals(ImageFormat.Jpeg))
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{
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file += ".jpeg";
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}
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else if (format.Equals(ImageFormat.Png))
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{
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file += ".png";
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}
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else if (format.Equals(ImageFormat.Bmp))
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{
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file += ".bmp";
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}
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else if (format.Equals(ImageFormat.Gif))
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{
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file += ".gif";
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}
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else if (format.Equals(ImageFormat.Icon))
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{
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file += ".icon";
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}
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System.IO.FileInfo info = new System.IO.FileInfo(file);
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System.IO.Directory.CreateDirectory(info.Directory.FullName);
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File.WriteAllBytes(file, buffer);
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return file;
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}
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}
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}
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