C# ：实现水印与图片合成，并利用Graphics 压缩图像质量 , (委托实现listB...

using System;  

using System.Collections.Generic;  

using System.ComponentModel;  

using System.Data;  

using System.Drawing;  

using System.Text;  

using System.Windows.Forms;  

  

using System.IO;  

using System.Drawing.Text;  

using System.Drawing.Drawing2D;  

using System.Drawing.Imaging;  

using System.Threading;  

namespace FontDemo  

{  

    public partial class MarkImage : Form  

    {  

         int i = 0;  

        public MarkImage()  

        {  

            InitializeComponent();  

        }  

  

        private void MarkImage_Load(object sender, EventArgs e)  

        {  

  

        }  

  

        /// <summary>  

        /// 保存图片 " 图片水印 "   

        /// </summary>  

        /// <param name="InUploadImagePath">原服务器图片路径</param>  

        ///<param name="inLogoImagePath">生成的带图片水印的图片路径</param>  

        ///<param name="InSavePath">水印图片路径</param>  

        ///<param name="strType">原图片文件类型</param>  

        public void MarkToImage(string InUploadImagePath, string inLogoImagePath, string InSavePath, string strType)  

        {  

            //FileStream fs = new FileStream(System.Windows.Forms.Application.StartupPath + @"\Img\" + InUploadImagePath, FileMode.Open, FileAccess.ReadWrite);  

            //System.Drawing.Image img = System.Drawing.Image.FromStream(fs, false, false);  

            //Bitmap bmp = new Bitmap(img);  

            //img.Dispose();  

            //fs.Close();  

  

            //System.Drawing.Image Image = bmp;  

            //System.Drawing.Image newimage = System.Drawing.Image.FromFile(System.Windows.Forms.Application.StartupPath + @"\" + inLogoImagePath);  

            //Graphics g = Graphics.FromImage(Image);  

            //g.DrawImage(newimage, new Rectangle(Image.Width - newimage.Width, Image.Height - newimage.Height, newimage.Width, newimage.Height), 0, 0, newimage.Width, newimage.Height, GraphicsUnit.Pixel);  

  

            //System.Drawing.Image Image = System.Drawing.Image.FromFile(System.Windows.Forms.Application.StartupPath + @"\Img\" +InUploadImagePath);  

            //System.Drawing.Image newimage = System.Drawing.Image.FromFile(System.Windows.Forms.Application.StartupPath + @"\" +inLogoImagePath);  

            //Graphics g = Graphics.FromImage(Image);  

            //g.DrawImage(newimage, new Rectangle(Image.Width - newimage.Width, Image.Height - newimage.Height, newimage.Width, newimage.Height), 0, 0, newimage.Width, newimage.Height, GraphicsUnit.Pixel);  

            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  

            //g.InterpolationMode = InterpolationMode.HighQualityBicubic;  

            //g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;  

  

            //Image.Save(System.Windows.Forms.Application.StartupPath + @"\ImgBak\" + InSavePath);  

            //string pith = "C:\\Documents and Settings\\Administrator\\桌面\\临时目录\\IMg-09-07-21\\FontDemo\\FontDemo\\bin\\Debug\\ImgBak\\" + InSavePath;  

            //Image.Save(pith);  

            //System.Windows.Forms.Application.StartupPath = "C:\\Documents and Settings\\Administrator\\桌面\\临时目录\\IMg-09-07-21\\FontDemo\\FontDemo\\bin\\Debug"  

  

            Bitmap imgTemp = new Bitmap(System.Windows.Forms.Application.StartupPath + @"\Img\" + InUploadImagePath);//创建Image对象，大小为200 * 200  

            Graphics gType = Graphics.FromImage(imgTemp);//在Image对象上创建Graphics对象g2  

            GraphicsPath typePath = new GraphicsPath();  

            Bitmap img = new Bitmap(System.Windows.Forms.Application.StartupPath + @"\" + inLogoImagePath);//创建Image对象，大小为200 * 200  

  

            try  

            {  

                //gType.DrawImage(img, 590, 1100, img.Width, img.Height);  

                gType.DrawImage(img, new Rectangle(imgTemp.Width - img.Width, imgTemp.Height - img.Height, img.Width, img.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);  

  

                string ps = System.Windows.Forms.Application.StartupPath + @"\ImgBak\" + InUploadImagePath;  

                imgTemp.Save(ps, System.Drawing.Imaging.ImageFormat.Png);  

  

                 

                 

                

            }  

            catch (Exception de)  

            {  

                MessageBox.Show(de.Message);  

            }  

            finally  

            {  

                //MyItem item1 = new MyItem();  

                //item1.id = i.ToString();  

                //item1.name = InUploadImagePath + " - 已生成..";  

  

                //i++;  

  

                //this.listBox1.Items.Add(item1);  

                //this.pictureBox1.Image = imgTemp;  

  

                typePath.Dispose();  

                imgTemp.Dispose();  

                img.Dispose();  

                //newimage.Dispose();  

            }  

        }  

  

        private void button1_Click(object sender, EventArgs e)  

        {  

            this.listBox1.Items.Clear();  

  

            MethodInvoker mi = new MethodInvoker(Add);  

            mi.BeginInvoke(null, null);     

  

              

                 

         }  

  

        public  class MyItem : object  

        {  

            public  string name;  

            public  string id;  

            public override string ToString()  

            {  

                // TODO:   添加 MyItem.ToString 实现  

                return name;  

            }  

        }  

  

        public delegate void delegateMethod(string fileName, Bitmap imgTem);  

  

        public void Add()  

        {  

            DelegateChangeButton bu = new DelegateChangeButton(ButtonEnable);  

            this.BeginInvoke(bu, new object[] { false });  

             

            string sd = AppDomain.CurrentDomain.BaseDirectory + "Img";  

            string[] files = Directory.GetFiles(sd);  

            foreach (string f in files)  

            {  

                if (f.LastIndexOf("\\") != -1)  

                {  

                    string strFile = f.Substring(f.LastIndexOf("\\") + 1);  

                    string strType = strFile.Substring(strFile.Length - 3, 3);  

                    if (strType.ToLower() == "bmp" || strType.ToLower() == "png" || strType.ToLower() == "jpg")  

                    {                

                        Bitmap imgTemp = new Bitmap(System.Windows.Forms.Application.StartupPath + @"\Img\" + strFile);//创建Image对象，大小为200 * 200  

                        Graphics gType = Graphics.FromImage(imgTemp);//在Image对象上创建Graphics对象g2  

                        GraphicsPath typePath = new GraphicsPath();  

                        Bitmap img = new Bitmap(System.Windows.Forms.Application.StartupPath + @"\" + "ddK.png");//创建Image对象，大小为200 * 200  

  

                        if (imgTemp.Width >= 400 && imgTemp.Height >= 150)  

                        {  

  

                            try  

                            {  

                                ////EncoderParameter p;  

                                ////EncoderParameters ps;  

                                ////ps = new EncoderParameters(1);  

                                ////p = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.CompressionLZW);  

                                ////ps.Param[0] = p;  

                                  

                                ////gType.DrawImage(img, new Rectangle(imgTemp.Width - img.Width, imgTemp.Height - img.Height, img.Width, img.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);  

                                ////gType.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  

                                ////gType.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  

                                ////gType.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;  

  

                                ////string pngB = System.Windows.Forms.Application.StartupPath + @"\ImgBak\" + strFile;  

                                ////imgTemp.Save(pngB, GetCodecInfo("image/bmp"), ps);  

  

                                //EncoderParameter p;  

                                //EncoderParameters ps;  

                                //ps = new EncoderParameters(1);  

                         

                                ////p = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionRle);  

                                //long sdd = (long)EncoderValue.CompressionRle;  

                                //p = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.TransformRotate270);  

                                //ps.Param[0] = p;  

  

                                gType.DrawImage(img, new Rectangle(imgTemp.Width - img.Width, imgTemp.Height - img.Height, img.Width, img.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);  

                                //gType.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  

                                //gType.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  

                                //gType.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;  

  

                                string pngB = System.Windows.Forms.Application.StartupPath + @"\ImgBak\" + strFile;  

                                //imgTemp.Save(pngB, GetCodecInfo("image/jpeg"), ps);  

  

  

                                //imgTemp.Save(pngB, System.Drawing.Imaging.ImageFormat.Png);  

                                EncoderParameters encoderParams = new EncoderParameters();  

                                long[] quality = new long[1];  

                                quality[0] = 92; //压缩比例，决定图片大小的重要因素。  

                                EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);  

                                encoderParams.Param[0] = encoderParam;  

                                 

                                imgTemp.Save(System.Windows.Forms.Application.StartupPath + @"\ImgBak\" + strFile, GetCodecInfo("image/jpeg"), encoderParams);  

  

                                if (listBox1.InvokeRequired)  

                                {  

                                    delegateMethod m = new delegateMethod(Referesh);  

                                    this.BeginInvoke(m, new object[] { strFile, imgTemp });  

                                }  

                                else  

                                {  

                                    Referesh(strFile, imgTemp);  

                                }  

                                Thread.Sleep(100);  

  

                                //EncoderParameters encoderParams = new EncoderParameters();  

                                //long[] quality = new long[1];  

                                //quality[0] = 90;  

                                //EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);  

                                //encoderParams.Param[0] = encoderParam;  

                                //Bitmap imgLast = new Bitmap(pngB);//创建Image对象  

                                //imgLast.Save(System.Windows.Forms.Application.StartupPath + @"\images\" + strFile, GetCodecInfo("image/jpeg"), encoderParams);  

  

                               // SmallPic(pngB, System.Windows.Forms.Application.StartupPath + @"\images\" + strFile, imgTemp.Width, imgTemp.Height);  

                            }  

                            catch (Exception de)  

                            {  

                                MessageBox.Show(de.Message);  

                            }  

                            finally  

                            {  

  

                                typePath.Dispose();  

                                //imgTemp.Dispose();  

                                //img.Dispose();  

                            }  

                        }  

                    }  

                }  

            }  

  

            delegateMethodEND en = new delegateMethodEND(EndList);  

            this.BeginInvoke(en);  

  

            this.BeginInvoke(bu, new object[] { true });  

  

        }  

  

         /**//// <summary>  

        /// 保存JPG时用  

        /// </summary>  

        /// <param name="mimeType"></param>  

        /// <returns>得到指定mimeType的ImageCodecInfo</returns>  

        private  ImageCodecInfo GetCodecInfo(string mimeType)  

        {  

             ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();  

            foreach (ImageCodecInfo ici in CodecInfo)  

            {  

                if (ici.MimeType == mimeType) return ici;  

             }  

            return null;  

         }  

  

        public void ButtonEnable(bool flag)  

        {  

            this.button1.Enabled = flag;  

        }  

        public void Referesh(string fileName, Bitmap imgTem)  

        {  

            listBox1.Items.Add(DateTime.Now.ToShortTimeString() + @"分 - ImgBak\" + fileName + "  已生成");  

            listBox1.SelectedIndex = listBox1.Items.Count - 1;  

            this.pictureBox1.Image = imgTem;  

  

            Application.DoEvents();  

        }  

  

        public void EndList()  

        {  

            listBox1.Items.Add(DateTime.Now.ToShortTimeString() + @"分  -网站所有水印图生成结束！");  

            listBox1.SelectedIndex = listBox1.Items.Count - 1;       

             

        }  

        public delegate void delegateMethodEND();  

        public delegate void DelegateChangeButton(bool flag);  

  

        //public delegate void DelegateChangeIMG(Bitmap imgTem);   

  

        public  bool SmallPic(string strOldPic, string strNewPic, int widthEx, int heightEx)  

        {//提供原始图片，目标路径，以及想要生成的缩略图尺寸  

            System.Drawing.Bitmap objPic, objNewPic;  

            objPic = new System.Drawing.Bitmap(strOldPic);  

            int width, height;  

            width = objPic.Width;  

            height = objPic.Height;  

  

            if ((int)(height / heightEx) >= (int)(width / widthEx))  

            {//高度压缩比例大于宽度  

                SmallPicW(strOldPic, strNewPic, heightEx, widthEx);  

                objPic.Dispose();  

                return true;  

            }  

            else  

            {//高度压缩比例小于宽度  

                SmallPicH(strOldPic, strNewPic, widthEx, heightEx);  

                objPic.Dispose();  

                return true;  

            }  

        }  

  

        ///下面这个函数处理高度压缩比例小于宽度的情况  

        private  void SmallPicH(string strOldPic, string strNewPic, int intWidth, int descHeight)  

        {  

            System.Drawing.Bitmap objPic, smallObjPic, objNewPic;  

            objPic = null;  

            objNewPic = null;  

            smallObjPic = null;  

            try  

            {  

                objPic = new System.Drawing.Bitmap(strOldPic);  

  

                //将原始图片放入到内存里   

                int intHeight = (intWidth * objPic.Height) / objPic.Width;  

                smallObjPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);  

                objNewPic = new System.Drawing.Bitmap(intWidth, descHeight, PixelFormat.Format64bppPArgb);  

                //在内存里生成一张跟缩略图尺寸一样的空图片。  

                objNewPic.SetResolution(objPic.HorizontalResolution, objPic.VerticalResolution);  

                Graphics grPhoto = Graphics.FromImage(objNewPic);  

                if (objPic.Width < intWidth)  

                {  

                    grPhoto.FillRectangle(System.Drawing.Brushes.White, 0, 0, intWidth, descHeight);  

                    grPhoto.DrawImage(smallObjPic, new Rectangle((intWidth - objPic.Width) / 2,  

                    (descHeight - objPic.Height) / 2, objPic.Width, objPic.Height));  

                }  

                else  

                {  

                    grPhoto.FillRectangle(System.Drawing.Brushes.White, 0, 0, intWidth, descHeight);  

                    grPhoto.DrawImage(smallObjPic, new Rectangle(0, (descHeight - intHeight) / 2, intWidth, intHeight)  

                    , 0, 0, intWidth, intHeight, System.Drawing.GraphicsUnit.Pixel);  

                }  

 

 

                #region  保存图片  

                EncoderParameters encoderParams = new EncoderParameters();  

                long[] quality = new long[1];  

                quality[0] = 90;  

                EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);  

                encoderParams.Param[0] = encoderParam;  

                //获得包含对应的图片编解码程序   

                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();  

                ImageCodecInfo jpegICI = null;  

                for (int x = 0; x < arrayICI.Length; x++)  

                {  

                    if (arrayICI[x].FormatDescription.Equals("JPEG"))  

                    {  

                        jpegICI = arrayICI[x];//  

                        break;  

                    }  

                }  

                if (jpegICI != null)  

                {  

                    objNewPic.Save(strNewPic, jpegICI, encoderParams);  

                }  

                else  

                {  

                    objNewPic.Save(strNewPic, System.Drawing.Imaging.ImageFormat.Jpeg);  

                }  

                objPic.Dispose();  

                objPic = null;  

                objNewPic.Dispose();  

                objNewPic = null;  

                smallObjPic.Dispose();  

                smallObjPic = null;  

                #endregion  

  

            }  

            catch (Exception exp)  

            {  

            }  

            finally  

            {  

                if (objPic != null)  

                    objPic.Dispose();  

                if (objNewPic != null)  

                    objNewPic.Dispose();  

                if (smallObjPic != null)  

                    smallObjPic.Dispose();  

                objPic = null;  

                objNewPic = null;  

                smallObjPic = null;  

            }  

        }  

  

        ///以下函数是处理高度压缩比例大于宽度的情况  

        private  void SmallPicW(string strOldPic, string strNewPic, int intHeight, int descWidth)  

        {  

            System.Drawing.Bitmap objPic, smallObjPic, objNewPic;  

            objPic = null;  

            objNewPic = null;  

            smallObjPic = null;  

            try  

            {  

                objPic = new System.Drawing.Bitmap(strOldPic);  

                int intWidth = (intHeight * objPic.Width) / objPic.Height;  

  

                smallObjPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);  

                objNewPic = new System.Drawing.Bitmap(descWidth, intHeight, PixelFormat.Format64bppPArgb);  

                objNewPic.SetResolution(objPic.HorizontalResolution, objPic.VerticalResolution);  

                Graphics grPhoto = Graphics.FromImage(objNewPic);  

  

                if (objPic.Height < intHeight)  

                {//  

                    grPhoto.FillRectangle(System.Drawing.Brushes.White, 0, 0, descWidth, intHeight);  

                    Rectangle r = new Rectangle((descWidth - objPic.Width) / 2, (intHeight - objPic.Height) / 2,  

                    intWidth, objPic.Height);  

                    grPhoto.DrawImage(smallObjPic, r);  

                }  

                else  

                {  

                    grPhoto.FillRectangle(System.Drawing.Brushes.White, 0, 0, descWidth, intHeight);  

                    grPhoto.DrawImage(smallObjPic, new Rectangle((descWidth - intWidth) / 2, 0, intWidth, intHeight),  

, 0, intWidth, intHeight, System.Drawing.GraphicsUnit.Pixel);  

                }  

                #region  

                EncoderParameters encoderParams = new EncoderParameters();  

                long[] quality = new long[1];  

                quality[0] = 90;  

                EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);  

                encoderParams.Param[0] = encoderParam;  

                //   

                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();  

                ImageCodecInfo jpegICI = null;  

                for (int x = 0; x < arrayICI.Length; x++)  

                {  

                    if (arrayICI[x].FormatDescription.Equals("JPEG"))  

                    {  

                        jpegICI = arrayICI[x];//  

                        break;  

                    }  

                }  

                if (jpegICI != null)  

                {  

                    objNewPic.Save(strNewPic, jpegICI, encoderParams);  

                }  

                else  

                {  

                    objNewPic.Save(strNewPic, System.Drawing.Imaging.ImageFormat.Jpeg);  

                }  

                objPic.Dispose();  

                objPic = null;  

                objNewPic.Dispose();  

                objNewPic = null;  

                smallObjPic.Dispose();  

                smallObjPic = null;  

                #endregion  

  

            }  

            catch (Exception exp)  

            {  

                throw exp;  

            }  

            finally  

            {  

                if (objPic != null)  

                    objPic.Dispose();  

                if (objNewPic != null)  

                    objNewPic.Dispose();  

                if (smallObjPic != null)  

                    smallObjPic.Dispose();  

                objPic = null;  

                smallObjPic = null;  

                objNewPic = null;  

            }  

        }  

  

    }  

}