根据高度和宽度裁剪图片并保存到指定文件目录的示例代码,C#代码库,德仔网

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【C#】根据高度和宽度裁剪图片并保存到指定文件目录的示例

作者:越泽 / 发布于2017/3/16/ 468

using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Drawing.Imaging;
using System;

namespace CropImageDemo
{
  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("Starting crop image...");
      SaveByteArrayToImageFile(CropImage(@"crop-image-demo-before.jpg", 0, 0, 240, 240));
      Console.WriteLine("Crop image completed.");
    }

    static byte[] CropImage(string imagePath, int x, int y, int width, int height)
    {
      try
      {
        using (var originalImg = Image.FromFile(imagePath))
        {
          using (var bmp = new Bitmap(width, height))
          {
            bmp.SetResolution(originalImg.HorizontalResolution, originalImg.VerticalResolution);
            using (var graphic = Graphics.FromImage(bmp))
            {
              graphic.SmoothingMode = SmoothingMode.AntiAlias;
              graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
              graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;
              graphic.DrawImage(originalImg, new Rectangle(0, 0, width, height), x, y, width, height, GraphicsUnit.Pixel);
              var ms = new MemoryStream();
              bmp.Save(ms, originalImg.RawFormat);
              return ms.GetBuffer();
            }
          }
        }
      }
      catch (Exception ex)
      {
        throw ex;
      }
    }

    static void SaveByteArrayToImageFile(byte[] imageByte)
    {
      try
      {
        using (var image = Image.FromStream(new MemoryStream(imageByte)))
        {
          image.Save(@"crop-image-demo-after.jpg", ImageFormat.Jpeg);
        }
      }
      catch(Exception ex)
      {
        throw ex;
      }
    }
  }
}

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