There are many ways we can export HTML Table to PDF document. Here I’ll explain the easiest way to export HTML Table to PDF.
WebClient class provide the feature to download the HTML string from current URL. First we need to make sure that how we can extract HTML Table from entire source code and how we can get content from that HTML table. <table> tag contains <tr> and <td> tags but it may have style properties. So first we have to avoid these style properties and after we can get required content from table.
Here we have to format HTML tags for avoid style properties
Sample code:
const string msgFormat = "table[{0}], tr[{1}], td[{2}], a: {3}, b: {4}";
const string table_pattern = "<table.*?>(.*?)</table>";
const string tr_pattern = "<tr.*?>(.*?)</tr>";
const string td_pattern = "<td.*?>(.*?)</td>";
const string a_pattern = "<a href=\"(.*?)\"></a>";
const string b_pattern = "<b>(.*?)</b>";
After through looping we can find <tr> and <td> elements. Then we can get content within <td></td> tags by using this method.
private static List<string> GetContents(string input, string pattern)
{
MatchCollection matches = Regex.Matches(input, pattern, RegexOptions.Singleline);
List<string> contents = new List<string>();
foreach (Match match in matches)
contents.Add(match.Value);
return contents;
}
Designer source code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default"
EnableEventValidation="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>HTML to PDF</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table style="width:500px; height:200px">
<tr>
<td> Name </td>
<td> Age </td>
<td> Sex </td>
</tr>
<tr>
<td> Sachin </td>
<td> 25 </td>
<td> Male </td>
</tr>
<tr>
<td> Saran </td>
<td> 24 </td>
<td> Male </td>
</tr>
<tr>
<td> Priya </td>
<td> 24 </td>
<td> Female </td>
</tr>
</table>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
</div>
</form>
</body>
</html>
C# code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.Adapters;
using System.Collections;
using System.Text.RegularExpressions;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;
using System.Net;
using iTextSharp.text.html.simpleparser;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
const string msgFormat = "table[{0}], tr[{1}], td[{2}], a: {3}, b: {4}";
const string table_pattern = "<table.*?>(.*?)</table>";
const string tr_pattern = "<tr.*?>(.*?)</tr>";
const string td_pattern = "<td.*?>(.*?)</td>";
const string a_pattern = "<a href=\"(.*?)\"></a>";
const string b_pattern = "<b>(.*?)</b>";
private static List<string> GetContents(string input, string pattern)
{
MatchCollection matches = Regex.Matches(input, pattern, RegexOptions.Singleline);
List<string> contents = new List<string>();
foreach (Match match in matches)
contents.Add(match.Value);
return contents;
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
WebClient wc = new WebClient();
string url = Request.Url.AbsoluteUri;
string fileContent = wc.DownloadString(url);
List<string> tableContents = GetContents(fileContent, table_pattern);
string HTMLString = String.Join(" ", tableContents.ToArray());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
pdfDoc.Add(new Paragraph("Welcome to dotnetfox"));
List<IElement> htmlarraylist = HTMLWorker.ParseToList(new StringReader(HTMLString), null);
for (int k = 0; k < htmlarraylist.Count; k++)
{
pdfDoc.Add((IElement)htmlarraylist[k]);
}
pdfDoc.Close();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;" +
"filename=sample.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Write(pdfDoc);
Response.End();
}
}
