4C/GummingCommon/Services/GDIService.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GummingCommon
{
    public class GDIService
    {
        public static bool IsPicture(string fileName)
        {
            string strFilter = ".jpeg|.gif|.jpg|.png|.bmp|.pic|.tiff|.ico|.iff|.lbm|.mag|.mac|.mpt|.opt|";
            char[] separtor = { '|' };
            string[] tempFileds = strFilter.Trim().Split(separtor);
            foreach (string str in tempFileds)
            {
                if (str.ToUpper() == fileName.Substring(fileName.LastIndexOf("."), fileName.Length - fileName.LastIndexOf(".")).ToUpper())
                {
                    return true;
                }
            }
            return false;
        }

        public static string GetImageType(string contentType)
        {
            switch (contentType)
            {
                case "image/jpeg":
                    return "jpg";


            }

            return "jpg";
        }
        private static void SetGraphics(Graphics g, Color c)
        {
            g.CompositingMode = CompositingMode.SourceCopy;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;
            g.CompositingQuality = CompositingQuality.HighQuality;
            g.Clear(c);
            ///////////////////////////////////////////////////////////////////////////   
        }

        public static void SetGraphics(Graphics g)
        {
            SetGraphics(g, Color.FromArgb(235, 235, 235));
        }

        public static MemoryStream DrawString(int left, int top, string content, Font font)
        {
            Bitmap bitmap = new Bitmap(100, 20);
            Graphics g = Graphics.FromImage(bitmap);
            g.Clear(Color.FromArgb(235, 235, 235));
            //Font font = new Font("Airal", 9);
            g.DrawString(content, font, Brushes.Black, new Point(left, top));
            EncoderParameters encoderParameters = new EncoderParameters(1);
            encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, 100);
            MemoryStream ms = new MemoryStream();
            bitmap.Save(ms, ImageCodecInfo.GetImageEncoders()[1], encoderParameters);
            return ms;
        }
    }
}