Extract Table Data from PDF Documents into table in C#

Spire.PDF library can be used to detect and extract table data from PDF, then you can save the extracted data to database.

https://www.e-iceblue.com/Download/download-pdf-for-net-now.html

Sample code:

using System.IO;
using System.Text;
using Spire.Pdf;
using Spire.Pdf.Utilities;

namespace ExtractPdfTable
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a PdfDocument object
            PdfDocument doc = new PdfDocument();

            //Load the sample PDF file
            doc.LoadFromFile(@"C:\Users\Administrator\Desktop\table.pdf");

            //Create a StringBuilder object
            StringBuilder builder = new StringBuilder();

            //Initialize an instance of PdfTableExtractor class
            PdfTableExtractor extractor = new PdfTableExtractor(doc);

            //Declare a PdfTable array 
            PdfTable[] tableList = null;

            //Loop through the pages 
            for (int pageIndex = 0; pageIndex < doc.Pages.Count; pageIndex++)
            {
                //Extract tables from a specific page
                tableList = extractor.ExtractTable(pageIndex);

                //Determine if the table list is null
                if (tableList != null && tableList.Length > 0)
                {
                    //Loop through the table in the list
                    foreach (PdfTable table in tableList)
                    {
                        //Get row number and column number of a certain table
                        int row = table.GetRowCount();
                        int column = table.GetColumnCount();

                        //Loop though the row and colunm 
                        for (int i = 0; i < row; i++)
                        {
                            for (int j = 0; j < column; j++)
                            {
                                //Get text from the specific cell
                                string text = table.GetText(i, j);

                                //Add text to the string builder
                                builder.Append(text + " ");
                            }
                            builder.Append("\r\n");
                        }
                    }
                }
            }

            //Write to a .txt file
            File.WriteAllText("Table.txt", builder.ToString());
        }
    }
}

For more information, you can visit this documentation:

https://www.e-iceblue.com/Tutorials/NET/Spire.PDF/Program-Guide/Table/C-/VB.NET-Extract-Tables-from-PDF.html 

you can check this link - 

https://social.msdn.microsoft.com/Forums/windows/en-US/4f35879e-16bf-4648-ae41-7b10accfdc27/extract-a-pdf-from-sqldatabase-and-display-it-using-c