Image 與 byte[] 互轉
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/// <summary> |
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/// 將 Byte 陣列轉換為 Image。 |
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/// </summary> |
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/// <param name="Buffer">Byte 陣列。</param> |
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public static Image BufferToImage(byte[] Buffer) { |
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if (Buffer == null || Buffer.Length == 0) { return null; } |
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byte[] data = null; |
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Image oImage = null; |
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Bitmap oBitmap = null; |
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//建立副本 |
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data = (byte[])Buffer.Clone(); |
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try { |
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MemoryStream oMemoryStream = new MemoryStream(Buffer); |
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//設定資料流位置 |
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oMemoryStream.Position = 0; |
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oImage = System.Drawing.Image.FromStream(oMemoryStream); |
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//建立副本 |
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oBitmap = new Bitmap(oImage); |
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} |
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catch { |
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throw; |
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} |
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//return oImage; |
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return oBitmap; |
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} |
sample2 將 Image 轉換為 Byte 陣列。
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/// <summary> |
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/// 將 Image 轉換為 Byte 陣列。 |
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/// </summary> |
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/// <param name="Image">Image 。</param> |
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/// <param name="imageFormat">指定影像格式。</param> |
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public static byte[] ImageToBuffer(Image Image, System.Drawing.Imaging.ImageFormat imageFormat) { |
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if (Image == null) { return null; } |
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byte[] data = null; |
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using (MemoryStream oMemoryStream = new MemoryStream()) { |
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//建立副本 |
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using (Bitmap oBitmap = new Bitmap(Image)) { |
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//儲存圖片到 MemoryStream 物件，並且指定儲存影像之格式 |
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oBitmap.Save(oMemoryStream, imageFormat); |
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//設定資料流位置 |
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oMemoryStream.Position = 0; |
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//設定 buffer 長度 |
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data = new byte[oMemoryStream.Length]; |
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//將資料寫入 buffer |
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oMemoryStream.Read(data, 0, Convert.ToInt32(oMemoryStream.Length)); |
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//將所有緩衝區的資料寫入資料流 |
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oMemoryStream.Flush(); |
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} |
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} |
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return data; |
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} |
