PCB 自动发送邮件---加入表格实现方法

先看一下手动发送邮件内容加入表格操作(下图所示),直接复制Excel内容,再粘贴到邮件内容中，就是这么便捷，如果我们想自动发送邮件,也实现同样的效果如果实现呢，在这里介绍2种方法:

一.读取Excel转为HTML

1.C#读取Excel转为HTML代码

/// <summary>
        /// 测试用拼接Html
        /// </summary>
        public void Test()
        {
            string Body = @"你好：
      附件为【{FileName}】资料,请注意查收.
      {Table}
                                   {Data}
============================
此为系统自动发送邮件,请勿回复
pcbren致力于PCB自动化研究
============================
";

            string FileName = "pcbren";
            Body = Body.Replace("{FileName}", FileName);
            Body = Body.Replace("{Data}", DateTime.Now.ToString("yyyy-MM-dd"));
            Body = Body.Replace("\r\n", "<br>");
            string table = ReadXLS(@"E:\AA\test.xls");
            Body = Body.Replace("{Table}", table);
            Body = @"
<html>
    <style>
        table,table tr th, table tr td { border:1px solid #0094ff; }
        table { min-height: 25px; line-height: 25px; text-align: center; border-collapse: collapse;}   
    </style>
<body>
{body}
</body>
</html>

  ".Replace("{body}", Body); ;
        }

        /// <summary>
        /// 读取Excel表格内容
        /// </summary>
        /// <param name="xlsPath"></param>
        /// <returns></returns>
        public string ReadXLS(string xlsPath)
        {
            object missing = System.Reflection.Missing.Value;
            Excel.Application app = new Excel.Application();
            app.Visible = false;
            app.UserControl = true;
            Excel.Workbook wb = app.Application.Workbooks.Open(xlsPath, missing, true, missing, missing, missing,
             missing, missing, missing, true, missing, missing, missing, missing, missing);
            Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets.get_Item(1);
            int rowsint = ws.UsedRange.Cells.Rows.Count; //自动发邮件 表格行数应该固定更好
            int columnsint = ws.UsedRange.Cells.Columns.Count;//自动发邮件 表格列数应该固定更好
            StringBuilder sbHtml = new StringBuilder(1000);
            sbHtml.AppendLine("<table>");
            for (int x = 1; x <= rowsint; x++)
            {
                string trLine = "   <tr>";
                int columnsSum = 0;
                for (int y = 1; y <= columnsint; y++)
                {
                    trLine += (x == 1) ? "\r\n      <th>" : "\r\n      <td>";
                    var tt = (Excel.Range)ws.Cells[x, y];
                    string CellValue = (tt.Value ?? "").ToString().Trim();
                    trLine += CellValue;
                    trLine += (x == 1) ? "</th>" : "</td>";
                    if (!string.IsNullOrEmpty(CellValue))
                        columnsSum++;
                }
                trLine += "\r\n   </tr>";
                if (columnsSum > 0)
                    sbHtml.AppendLine(trLine);
            }
            sbHtml.AppendLine("</table>");
            return sbHtml.ToString();
        }

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