DTCMS，添加文章时，内容中第一张图片作缩略图，并且等比例缩放图片

DTCMS，添加文章时，内容中第一张图片作缩略图

admin/article/article_edit.aspx.cs

导入：

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

private bool DoAdd()方法

  //是否将编辑器远程图片保存到本地
            if (siteConfig.fileremote == )
            {

model.content = AutoRemoteImageSave(txtContent.Value);

后面加入：

//设置内容中第一张图片为缩略图

                Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?<1>[^\"]*)\"|'(?<1>[^\']*)')", RegexOptions.IgnoreCase);
                MatchCollection m = reg.Matches(model.content);
                foreach (Match math in m)
                {
                    if (math.Index >)
                    {

                        string imgUri = math.Groups[].Value;
                        if (imgUri != string.Empty)
                        {
                            string mini = imgUri.ToLower().Substring(imgUri.LastIndexOf("."));
                            string path = imgUri.Substring(0, imgUri.Length - mini.Length);
                            BLL.siteconfig bll_config = new BLL.siteconfig();
                            Model.siteconfig m_config = bll_config.loadConfig();
                            int h = m_config.thumbnailheight;
                            int w = m_config.thumbnailwidth;
                            Bitmap bmp = new Bitmap(Server.MapPath(imgUri));
                            Bitmap bmp_new = ZoomImage(bmp, h, w);
                            switch (mini)
                            {
                                case ".jpg": bmp_new.Save(Server.MapPath(path + "_thum" + mini), ImageFormat.Jpeg); break;
                                case ".gif": bmp_new.Save(Server.MapPath(path + "_thum" + mini), ImageFormat.Gif); break;
                                    
                            }

                            hidFocusPhoto.Value = path + "_thum" + mini;
　　　　　　　　　　　　　　　　break;
                        }
                    }

                }

添加方法：

       #region  等比例缩放图片
        private Bitmap ZoomImage(Bitmap bitmap, int destHeight, int destWidth)
        {
            try
            {

                System.Drawing.Image sourImage = bitmap;
                int width = , height = ;
                //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;
                }
                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) / , (destHeight - height) / , width, height), , , 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[];
                quality[] = ;
                System.Drawing.Imaging.EncoderParameter encoderParam = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
                encoderParams.Param[] = encoderParam;
                sourImage.Dispose();
                return destBitmap;
            }
            catch
            {
                return bitmap;
            }
        }
        #endregion