wmf文件转化

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

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

namespace CS_WMF2JPG
{
    /*
     sample wmf file : https://example-files.online-convert.com/vector%20image/wmf/example.wmf
     convert wmf to jpg c# : https://social.msdn.microsoft.com/Forums/vstudio/en-US/6341c2b2-ca60-45f0-9253-fdd35469d155/convert-wmf-to-jpg?forum=csharpgeneral
     */
    class Program
    {
        static void Pause()
        {
            Console.Write("Press any key to continue . . . ");
            Console.ReadKey(true);
        }

        /// <summary>
        /// 等比例缩放图片
        /// </summary>
        /// <param name="bitmap">图片</param>
        /// <param name="destHeight">高度</param>
        /// <param name="destWidth">宽度</param>
        /// <returns></returns>
        static Bitmap ZoomImage(Bitmap bitmap, int destHeight, int destWidth)
        {
            try
            {
                System.Drawing.Image sourImage = bitmap;
                int width = 0, height = 0;
                //按比例缩放
                int sourWidth = sourImage.Width;
                int sourHeight = sourImage.Height;
                if (sourHeight > destHeight || sourWidth > destWidth)
                {
                    if ((sourWidth * destHeight) > (sourHeight * destWidth))
                    {
                        width = destWidth;
                        height = (destWidth * sourHeight) / sourWidth;
                    }
                    else
                    {
                        height = destHeight;
                        width = (sourWidth * destHeight) / sourHeight;
                    }
                }
                else
                {
                    width = sourWidth;
                    height = sourHeight;
                }
                //width = sourWidth;
                //height = sourHeight;
                Bitmap destBitmap = new Bitmap(destWidth, destHeight);
                Graphics g = Graphics.FromImage(destBitmap);
                g.Clear(Color.Transparent);
                //设置画布的描绘质量
                g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                g.DrawImage(sourImage, new Rectangle((destWidth - width) / 2, (destHeight - height) / 2, width, height), 0, 0, sourImage.Width, sourImage.Height, GraphicsUnit.Pixel);
                g.Dispose();
                //设置压缩质量
                System.Drawing.Imaging.EncoderParameters encoderParams = new System.Drawing.Imaging.EncoderParameters();
                long[] quality = new long[1];
                quality[0] = 100;
                System.Drawing.Imaging.EncoderParameter encoderParam = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
                encoderParams.Param[0] = encoderParam;
                sourImage.Dispose();
                return destBitmap;
            }
            catch
            {
                return bitmap;
            }
        }
        static void WMF2JPG(String StrInputFile)
        {
            if(!File.Exists(StrInputFile))
            {
                Console.Write("file not exist:" + StrInputFile+"\n");
                return;
            }
            String StrOutputFile = StrInputFile.Split('.')[0] + "_1.jpg";

            Image i = Image.FromFile(StrInputFile, true);
            Bitmap b = new Bitmap(i);
            
            int SCALE_RATO = 25;
            b = ZoomImage(b, b.Height / SCALE_RATO, b.Width / SCALE_RATO);
            b.SetResolution(250, 250);
            Graphics g = Graphics.FromImage(b);
            /*
                If I recall correctly, WMF files do not store a background color which causes them to be transparent and when you convert it as we did previously, the color ends up being no color at all (ie black).

                In order to fix that we need to do a little more, namely create a new image, set it's background color and then paint the WMF file on top of it.
            */
            g.Clear(Color.White);

            g.DrawImage(i, 0, 0, i.Width / SCALE_RATO, i.Height / SCALE_RATO);
            b.Save(StrOutputFile, ImageFormat.Jpeg);

        }
        static void Main(string[] args)
        {
            string basePath = @"D:\typora\f\media\";
            int i;
            for(i = 1; i <= 155; i++)
            {
                WMF2JPG(basePath + "image" + i.ToString() + ".wmf");
            }
            
            //Pause();
        }
    }
}