通过电子邮件发送表格答案

【问题标题】：Send a table in email通过电子邮件发送表格
【发布时间】：2012-02-07 08:11:48
【问题描述】：

我需要通过电子邮件发送查询结果。我使用了两种方法：

GetDataTable() : 执行查询并获取数据表（需要通过电子邮件发送）

SendAutomatedEmail()：发送自动电子邮件。

问题：我需要在电子邮件中发送数据表或 html 表，类似于下面的代码。这适用于代替 dataTable 的字符串

public static void Main(string[] args)
{
    DataTable datatable = GetDataTable();
    SendAutomatedEmail(datatable );
}

    public static DataTable GetDataTable(string CommandText)
    {
        string cnString = ConfigurationManager.ConnectionStrings["Connection2"].ConnectionString;
        SqlConnection sqlConnection = new SqlConnection(cnString);

        string CommandText = "select * from dbo.fs010100 (nolock)";
        SqlCommand sqlCommand =  new SqlCommand( CommandText, sqlConnection);

        SqlDataAdapter sqlDataAdapter = new System.Data.SqlClient.SqlDataAdapter();
        sqlDataAdapter.SelectCommand = sqlCommand;

        DataTable dataTable = new DataTable();
        dataTable.Locale = System.Globalization.CultureInfo.InvariantCulture;

        // Adds or refreshes rows in the DataSet to match those in the data source
        try
        {
            sqlDataAdapter.Fill(dataTable);
            sqlConnection.Close(dataTable );
        }
        catch (Exception _Exception)
        {
            sqlConnection.Close();
            //Console.WriteLine(_Exception.Message);
            return null;
        }

        return dataTable;
    }


    public static void SendAutomatedEmail(DataTable dt, string recipient = "user@domain.com")
    {
        try
        {
            string mailServer = "server.com";

            MailMessage message = new MailMessage(
                                                   "it@domain.com",
                                                   recipient,
                                                   "Test Email",
                                                   dt.ToString()
                                                   );
            SmtpClient client = new SmtpClient(mailServer);
            var AuthenticationDetails = new NetworkCredential("user@domain.com", "password");
            client.Credentials = AuthenticationDetails;
            client.Send(message);
        }
        catch (Exception e)
        {

        }

    }

【问题讨论】：

表格必须在邮件正文中吗？
是的，email的内容就是表格
你可以把建表的原始html写出来，放在邮件正文中，例如：

header

行数据
。但请注意，许多电子邮件客户端都关闭了支持 HTML 的邮件，因此请确保不要破坏用户体验。
记得设置message.IsBodyHTML=true。

header
行数据

标签： c# .net email data-binding html-email

【解决方案1】：

在正文消息中插入此代码：


public string GetHtmlTable(string title, DataTable table)
        {
            try
            {
                string messageBody = "<font> "+title+" </font><br><br>";

                if (table.Rows.Count == 0)
                    return messageBody;
                string htmlTableStart = "<table style=\"border-collapse:collapse; text-align:center;\" >";
                string htmlTableEnd = "</table>";
                string htmlHeaderRowStart = "<tr style =\"background-color:#6FA1D2; color:#ffffff;\">";
                string htmlHeaderRowEnd = "</tr>";
                string htmlTrStart = "<tr style =\"color:#555555;\">";
                string htmlTrEnd = "</tr>";
                string htmlTdStart = "<td style=\" border-color:#5c87b2; border-style:solid; border-width:thin; padding: 5px;\">";
                string htmlTdEnd = "</td>";

                messageBody += htmlTableStart;

                messageBody += htmlHeaderRowStart;
                
                foreach(DataColumn column in table.Columns)
                    messageBody += htmlTdStart + column + htmlTdEnd;

                messageBody += htmlHeaderRowEnd;

                foreach (DataRow row in table.Rows)
                {
                    messageBody +=  htmlTrStart;


                    foreach (string item in row.ItemArray)
                    {
                        messageBody += htmlTdStart;
                        messageBody += item;
                        messageBody += htmlTdEnd;
                    }
                    messageBody += htmlTrEnd;
                }
                messageBody += htmlTableEnd;


                return messageBody;
            }
            catch (Exception e)
            {
                return null;
            }
        }

【讨论】：

【解决方案2】：

其他动态功能：

private string RenderDataTableToHtml(DataTable dtInfo)
    {
        StringBuilder tableStr = new StringBuilder();

        if(dtInfo.Rows != null && dtInfo.Rows.Count > 0)
        {
            int columnsQty = dtInfo.Columns.Count;
            int rowsQty = dtInfo.Rows.Count;

            tableStr.Append("<TABLE BORDER=\"1\">");
            tableStr.Append("<TR>");
            for (int j = 0; j < columnsQty; j++)
            {
                tableStr.Append("<TH>" + dtInfo.Columns[j].ColumnName + "</TH>");
            }
            tableStr.Append("</TR>");

            for (int i = 0; i < rowsQty; i++)
            {
                tableStr.Append("<TR>");
                for (int k = 0; k < columnsQty; k++)
                {
                    tableStr.Append("<TD>");
                    tableStr.Append(dtInfo.Rows[i][k].ToString());
                    tableStr.Append("</TD>");
                }
                tableStr.Append("</TR>");
            }

            tableStr.Append("</TABLE>");
        }            

        return tableStr.ToString();
    }
}

【讨论】：

【解决方案3】：

好的，现在试试这个：

public static void Main(string[] args)
{
    DataSet dataSet = getDataSet();
    string htmlString= getHtml(dataSet);
    SendAutomatedEmail(htmlString, "email@domain.com");
}

public static DataSet getDataSet(string CommandText)
{
    string cnString = ConfigurationManager.ConnectionStrings["Connection2"].ConnectionString;
    SqlConnection sqlConnection = new SqlConnection(cnString);

    string CommandText = "select * from dbo.fs010100 (nolock)";
    SqlCommand sqlCommand =  new SqlCommand( CommandText, sqlConnection);

    SqlDataAdapter sqlDataAdapter = new System.Data.SqlClient.SqlDataAdapter();
    sqlDataAdapter.SelectCommand = sqlCommand;

    DataSet dataSet = new DataSet();

    try
    {

        sqlDataAdapter.Fill(dataSet, "header");
        sqlConnection.Close();
    }
    catch (Exception _Exception)
    {
        sqlConnection.Close();

        return null;
    }

    return dataSet;

}


public static string getHtml(DataSet dataSet)
{
    try
    {
         string messageBody = "<font>The following are the records: </font><br><br>";

         if (dataSet.Tables[0].Rows.Count == 0)
             return messageBody;
         string htmlTableStart = "<table style=\"border-collapse:collapse; text-align:center;\" >";
         string htmlTableEnd = "</table>";
         string htmlHeaderRowStart = "<tr style =\"background-color:#6FA1D2; color:#ffffff;\">";
         string htmlHeaderRowEnd = "</tr>";
         string htmlTrStart = "<tr style =\"color:#555555;\">";
         string htmlTrEnd = "</tr>";
         string htmlTdStart = "<td style=\" border-color:#5c87b2; border-style:solid; border-width:thin; padding: 5px;\">";
         string htmlTdEnd = "</td>";

         messageBody+= htmlTableStart;
         messageBody += htmlHeaderRowStart;
         messageBody += htmlTdStart + "Column1 " + htmlTdEnd;
         messageBody += htmlHeaderRowEnd;

         foreach (DataRow Row in notShippedDataSet.Tables[0].Rows)
         {
             messageBody = messageBody + htmlTrStart;
             messageBody = messageBody + htmlTdStart + Row["fieldName"] + htmlTdEnd;
             messageBody = messageBody + htmlTrEnd;
         }
         messageBody = messageBody + htmlTableEnd;


         return messageBody;
     }
     catch (Exception ex)
     {
          return null;
     }
 }

public static void SendAutomatedEmail(string htmlString, string recipient = "user@domain.com")

{
 try
 {
     string mailServer = "server.com";

     MailMessage message = new MailMessage("it@domain.com", recipient);
     message .IsBodyHtml = true;
     message .Body = htmlString;
     message .Subject = "Test Email";

     SmtpClient client = new SmtpClient(mailServer);
     var AuthenticationDetails = new NetworkCredential("user@domain.com", "password");
     client.Credentials = AuthenticationDetails;
     client.Send(message);
 }
 catch (Exception e)
 {

 }

}

【讨论】：

这会在哪里循环列？这是一张只有一列的表格吗？

【解决方案4】：

如果您想做同样的事情，但通过 DataAdapter 循环遍历数据表，请查看此链接以获取快速示例 .. 因为您所做的几乎与此示例显示的相同，只是您尝试传递的异常整个数据表与将结果构建到电子邮件正文中.. How to use DataAdapter to DataTable via Email

【讨论】：

【解决方案5】：

过去，我创建了一个继承自 GridView 的对象 EmailGrid.cs。然后使用如下方法将 HTML 渲染成字符串。

  public string RenderControl()
        {
            StringBuilder stringBuilder = new StringBuilder();
            StringWriter stringWriter = new StringWriter(stringBuilder);
            HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);
            RenderControl(htmlTextWriter);

            return stringBuilder.ToString();
        }

【讨论】：

我在控制台应用程序中执行此操作，没有 system.web.dll dere
您是通过控制台应用程序还是 Web 应用程序发送电子邮件，您可以使用 System.Web.Mail 添加到代码顶部的 using；
但我无法找到对 system.web dll 的引用