C# 将数据保存为图片

今天因为业务需要，想做一个将查询出的数据保存为图片的方法，整理如下

 

示例效果

实现代码

        private void button2_Click(object sender, EventArgs e)
        {
            #region 自定义下拉列表
            DataTable dt = new DataTable();
            dt.Columns.Add("FItemID");
            dt.Columns.Add("FName");
            DataRow dr = dt.NewRow();
            dr["FItemID"] = 1;
            dr["FName"] = "孟海鹏";
            dt.Rows.Add(dr.ItemArray);
            dr["FItemID"] = 2;
            dr["FName"] = "扶庆峰";
            dt.Rows.Add(dr.ItemArray);
            dr["FItemID"] = 3;
            dr["FName"] = "老王";
            dt.Rows.Add(dr.ItemArray);
            #endregion


            #region 表头信息
            tableImage += @"<table style='border-collapse:collapse;width:500px;height:auto'>";
            tableImage += @"<tr>";
            tableImage += @"<td colspan = '4' style='text-align: center; border: 1px solid #000000;' >" + "改动信息对比 </td>";
            tableImage += @"</tr>";
            #endregion

            #region 表格信息
            tableImage += @"<td style='text-align: center; border: 1px solid #000000;'> 改动人 </td> 
<td style='text-align: center; border: 1px solid #000000;'>" + dt.Rows[2]["FName"].ToString() + "</td><td style='text-align: center; border: 1px solid #000000;'> 改动时间 </td><td style='text-align: center; border: 1px solid #000000;'>" + DateTime.Now.ToString("yyyy-MM-dd") + "</td>";

            tableImage += @"<tr>";
            tableImage += @"<td style='text-align: center; border: 1px solid #000000;'> 原值 </td>
                    <td style='text-align: center; border: 1px solid #000000;'>" + dt.Rows[0]["FName"].ToString() + "</td><td style='text-align: center; border: 1px solid #000000;'> 新值 </td><td style='text-align: center; border: 1px solid #000000;'>" + dt.Rows[1]["FName"].ToString() + "</td>";
            tableImage += @"</tr>";
            tableImage += @"<tr>";
            tableImage += @"<td colspan = '2' style='text-align: center; border: 1px solid #000000;'>" + dt.Rows[0]["FName"].ToString() + "</td><td colspan = '2' style='text-align: center; border: 1px solid #000000;'>" + dt.Rows[1]["FName"].ToString() + "</td>";
            tableImage += @"</tr>";

            tableImage += @"</table>";
            #endregion

            if (tableImage.Length > 0)
            {
                string path = @"D:\Desktop\项目练习\C#数据保存为图片\";
                string name = System.Guid.NewGuid().ToString() + ".JPG";
                Bitmap m_Bitmap = WebSiteThumbnail.GetWebSiteThumbnail(tableImage);
                if (m_Bitmap != null)
                {
                    MemoryStream ms = new MemoryStream();
                    m_Bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                    byte[] buff = ms.ToArray();

                    File.WriteAllBytes(path + name, buff);

                    ms.Dispose();
                    ms.Close();
                    m_Bitmap.Dispose();

                }
            }
        }

这里涉及到一个缩略图的类，类代码如下

    public class WebSiteThumbnail
    {
        Bitmap m_Bitmap;
        string m_Url;
        string m_html = string.Empty;

        public WebSiteThumbnail(string Url, string Html)
        {
            m_Url = Url;
            m_html = Html;
        }

        ///
        /// 生成缩略图
        ///
        /// 源码
        ///
        public static Bitmap GetWebSiteThumbnail(string Html)
        {
            WebSiteThumbnail thumbnailGenerator = new WebSiteThumbnail("", Html);
        ReTest:
            Bitmap m_Bitmap = thumbnailGenerator.GenerateWebSiteThumbnailImage();
            if (m_Bitmap == null)
            {
                goto ReTest;
            }
            return m_Bitmap;
        }

        public Bitmap GenerateWebSiteThumbnailImage()
        {
            Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
            m_thread.SetApartmentState(ApartmentState.STA);
            m_thread.Start();
            m_thread.Join();
            return m_Bitmap;
        }
        private void _GenerateWebSiteThumbnailImage()
        {
            System.Windows.Forms.WebBrowser m_WebBrowser = new WebBrowser();
            m_WebBrowser.ScrollBarsEnabled = false;
            m_WebBrowser.DocumentText = m_html;
            m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
            while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
                Application.DoEvents();
            m_WebBrowser.Dispose();
        }
        private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            WebBrowser m_WebBrowser = (WebBrowser)sender;
            m_WebBrowser.ScrollBarsEnabled = false;
            m_WebBrowser.Width = m_WebBrowser.Document.Body.ScrollRectangle.Width; ;
            m_WebBrowser.Height = m_WebBrowser.Document.Body.ScrollRectangle.Height;
            m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
            m_WebBrowser.BringToFront();
            m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
            m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height, null, IntPtr.Zero);
        }
    }

 

快去试试吧