Creating HTML from a DataTable using C#

Question

I need to be able to pass HTML data into Outlook like this:

MailMessage message = new MailMessage();
message.Body = myBody;

Initially, I th

Answer 1

This is my version of it, with added the possibility to "highlight" some rows based on a generic rule (rowHighlightRule parameter).

  public static string ToHTML(this DataTable dt, Func<DataRow, bool> rowHiglithRule)
    {

        if (dt == null) throw new ArgumentNullException("dt");

        string tab = "\t";

        StringBuilder sb = new StringBuilder();
        sb.AppendLine(tab + tab + "<table>");

        // headers.
        sb.Append(tab + tab + tab + "<thead><tr>");

        foreach (DataColumn dc in dt.Columns)
        {
            sb.AppendFormat("<td>{0}</td>", dc.ColumnName);
        }

        sb.AppendLine("</thead></tr>");

        // data rows
        foreach (DataRow dr in dt.Rows)
        {
            if (rowHiglithRule != null)
            {

                if (rowHiglithRule(dr))
                {
                    sb.Append(tab + tab + tab + "<tr class=\"highlightedRow\">");
                }
                else
                {
                    sb.Append(tab + tab + tab + "<tr>");
                }
            }
            else
            {
                //Non ho alcuna regola, quindi caso normale.
                sb.Append(tab + tab + tab + "<tr>");
            }

            foreach (DataColumn dc in dt.Columns)
            {
                string cellValue = dr[dc] != null ? dr[dc].ToString() : "";
                sb.AppendFormat("<td>{0}</td>", cellValue);
            }

            sb.AppendLine("</tr>");
        }

        sb.AppendLine(tab + tab + "</table>");


        return sb.ToString();
    }

Answer 2

 public string MakeJPGFromDataTable(DataTable dt)
    {
        Font fnt = new System.Drawing.Font("verdana", 10,FontStyle.Bold);
        string strPath = Path.GetTempPath();
        string strJPG = "";
        strPath += "Publisher";
        Directory.CreateDirectory(strPath);
        Graphics grfx = CreateGraphics();
        float nWdBMP = 0;
        float nHtBMP = 0;

        var TalleststringLength = dt.AsEnumerable().Max(row => row.ItemArray.Max(x => grfx.MeasureString(x.ToString(), fnt).Height));
        var longeststringLength = dt.AsEnumerable().Max(row => row.ItemArray.Max(x => grfx.MeasureString(x.ToString(), fnt).Width));
        //string ss =  dt.Columns[1].ToString();
        //int[] nColHeaderLengths = (from z in new int[7] { 0, 1, 2, 3, 4, 5, 6 } select dt.Columns.Cast<DataColumn>().Max(dc => (int)grfx.MeasureString(dt.Columns[z].ToString(), fnt).Width)).ToArray();
        //int[] nColWidths = (from z in new int[7] { 0, 1, 2, 3, 4, 5, 6 } select dt.AsEnumerable().Max(row => (int)grfx.MeasureString(row.ItemArray[z].ToString(), fnt).Width)).ToArray();
        var xx = (from x in dt.Columns.Cast<DataColumn>() select x.Ordinal).ToArray();
        var nColWidths = (from z in (xx)
                           select dt.AsEnumerable().Max(row =>
                               (grfx.MeasureString(row.ItemArray[z].ToString(), fnt).Width >
                               grfx.MeasureString(dt.Columns[z].ToString(), fnt).Width)
                               ? grfx.MeasureString(row.ItemArray[z].ToString(), fnt).Width
                               : grfx.MeasureString(dt.Columns[z].ToString(), fnt).Width)
            ).ToArray();

        nWdBMP = nColWidths.Sum();
        nHtBMP = TalleststringLength * (dt.Rows.Count + 1);
        int xPos = 0;
        int yPos = 0;
        int nMargin = 10;

        Bitmap mapMem = new Bitmap((int)nWdBMP + (nMargin * (dt.Columns.Count + 1)), (int)nHtBMP);
        Graphics grfxMem = Graphics.FromImage(mapMem);
        grfxMem.SmoothingMode = SmoothingMode.HighQuality;
        grfxMem.InterpolationMode = InterpolationMode.HighQualityBicubic;
        grfxMem.PixelOffsetMode = PixelOffsetMode.HighQuality;
        grfxMem.CompositingQuality = CompositingQuality.GammaCorrected;

        grfxMem.FillRectangle(lgBackgroundBrush,0,0,mapMem.Width,mapMem.Height);

        for (int j = 0; j < dt.Columns.Count; j++)
        {
            grfxMem.DrawString(dt.Columns[j].ToString(), fnt, lgFontBrush, xPos, yPos);
            //xPos += (int)grfx.MeasureString(dt.Columns[j].ToString(), fnt).Width;
            xPos += (int)nColWidths[j] + nMargin;
        }
        xPos = 0;
        yPos += (int)TalleststringLength;
        grfxMem.DrawLine(pen, new Point(0, yPos), new Point((int)mapMem.Width, yPos));
        //foreach (DataRow dr in dt.Rows)
        //{
        //    for (int j = 0; j < dt.Columns.Count; j++)
        //    {
        //        grfxMem.DrawString(dr[j].ToString(), fnt, Brushes.Blue, xPos, yPos);
        //        xPos += (int)nColWidths[j] + nMargin;
        //    }
        //    xPos = 0;
        //    yPos += (int)TalleststringLength;
        //}
        int s = 0;
        Func<object, bool> too_much_where = delegate(object itemCurrent)
        {
            grfxMem.DrawString(itemCurrent.ToString(), fnt, lgFontBrush, xPos, yPos);
            xPos += (int)nColWidths[s++] + nMargin;
            if (s >= dt.Columns.Count)
            {
                //Know what this determines the end of every row
                s = 0;
                xPos = 0;
                yPos += (int)TalleststringLength;
                grfxMem.DrawLine(pen, new Point(0, yPos), new Point((int)mapMem.Width, yPos));
            }
            return false;
        };
        //var sizzeler = (from dr in dt.AsEnumerable()
        //                let drItems = (from itemCurrent in dr.ItemArray select itemCurrent)
        //                               from item in drItems
        //                                where too_much_where(item)
        //                    select new
        //                    {
        //                        z = true,
        //                    }
        //                ).ToArray();
        var sizzeler = (from dr in dt.AsEnumerable()
                        where (dr.ItemArray.Where(itemCurrent => too_much_where(itemCurrent)).Count() == 0)
                        select new
                        {
                            z = true,
                        }
                        ).ToArray();
        s = 0;
        for (int j = 0; j < nColWidths.Length; j ++)
        {
            grfxMem.DrawLine(pen, new Point(s, 0), new Point(s, (int)mapMem.Height));
            s += (int)(nColWidths[j] + nMargin );
        }
        s = mapMem.Width-1;
        grfxMem.DrawRectangle(pen, new Rectangle(0, 0, mapMem.Width - 1, mapMem.Height - 1));
        s = 0;
        grfx.DrawImage(mapMem, (float)10.0, (float)10.0);
        grfx.Dispose();
        return strJPG;
    }

Answer 3

public string ConvertDataTableToHTMLTableInOneLine(DataTable dt)
    {
        //Convert DataTable To HTML Table in one line
        return "<table>\n<tr>" + string.Join("", dt.Columns.Cast<DataColumn>().Select(dc => "<td>" + dc.ColumnName + "</td>")) + "</tr>\n" +
        "<tr>" + string.Join("</tr>\n<tr>", dt.AsEnumerable().Select(row => "<td>" + string.Join("</td><td>", row.ItemArray) + "</td>").ToArray()) + "</tr>\n<\table>";

    }