利用C#轉換圖片格式及轉換為ico

注意:轉換為ICO後效果不好.

源代碼:

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace paomiangege
{
    public class ImageConvert
    {
        private int ICON_W = 64;
        private int ICON_H = 64;

        public ImageConvert()
        {
        }

        //fileinpath,origaly picture file path,fileoutpath save filepath,index the ImageFormat you want to convert to
        public string Convert(string fileinpath, string fileoutpath, string index)
        {
            try
            {
                Bitmap bitmap = new Bitmap(fileinpath);
                index = index.ToLower();
                switch (index)
                {
                    case "jpg":  bitmap.Save(fileoutpath, ImageFormat.Jpeg); break;
                    case "jpeg": bitmap.Save(fileoutpath, ImageFormat.Jpeg); break;
                    case "bmp":  bitmap.Save(fileoutpath, ImageFormat.Bmp); break;
                    case "png": bitmap.Save(fileoutpath, ImageFormat.Png); break;
                    case "emf": bitmap.Save(fileoutpath, ImageFormat.Emf); break;
                    case "gif": bitmap.Save(fileoutpath, ImageFormat.Gif); break;
                    case "wmf": bitmap.Save(fileoutpath, ImageFormat.Wmf); break;
                    case "exif": bitmap.Save(fileoutpath, ImageFormat.Exif); break;
                    case "tiff":
                        {
                            Stream stream = File.Create(fileoutpath);
                            bitmap.Save(stream, ImageFormat.Tiff);
                            stream.Close();
                        } break;
                    case "ico":
                        {
                            Icon ico;
                            Stream stream = File.Create(fileoutpath);
                            ico = BitmapToIcon(bitmap, false);
                            ico.Save(stream);       //   save the icon
                            stream.Close();
                        }; break;
                    default: return "Error!";
                }
                return "Success!";
            }
            catch(Exception ex)
            {
                return ex.Message;
            }
        }

        public string Convert(string fileinpath, string fileoutpath, string index,int width,int height)
        {
            if (width <= 0 || height <= 0)
                return "error!size illegal!";
            try
            {
                Bitmap mybitmap = new Bitmap(fileinpath);
                Bitmap bitmap = new Bitmap(mybitmap, width, height);
                index = index.ToLower();
                switch (index)
                {
                    case "jp