using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;
using Office = Microsoft.Office.Core;

namespace VSTO
{
    public partial class ThisAddIn
    {
        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            //Create empty presentation
            PowerPoint.Presentation ppt = this.Application.Presentations.Add();

            //Add a blank slide
            PowerPoint.Slide slide = ppt.Slides.Add(1, PowerPoint.PpSlideLayout.ppLayoutBlank);

            //Add table to slide
            PowerPoint.Shape shape = slide.Shapes.AddTable(6, 6, 0, 0, 800, 400);
            PowerPoint.Table table = shape.Table;

            //Loop the table to fill text
            for (int i = 1; i <= table.Rows.Count; i++)
            {
                for (int j = 1; j <= table.Columns.Count; j++)
                {                    
                    PowerPoint.TextFrame tf = table.Cell(i, j).Shape.TextFrame;
                    tf.TextRange.Text = "Row" + i.ToString() + "Col" + j.ToString();
                    tf.TextRange.ParagraphFormat.Alignment = PowerPoint.PpParagraphAlignment.ppAlignCenter;
                }
            }

            //Save the file
            ppt.SaveAs("Table.pptx");
        }

        private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
        {
        }

        #region VSTO generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InternalStartup()
        {
            this.Startup += new System.EventHandler(ThisAddIn_Startup);
            this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
        }
        
        #endregion
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Spire.Presentation;

namespace Spire.Presentation
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create PPT document
            Presentation ppt = new Presentation();
            
            //Add new table to PPT
            Double[] widths = new double[] {100,100,100,100,100,100};
            Double[] heights = new double[] { 50,50,50,50,50,50 };
            ITable table = ppt.Slides[0].Shapes.AppendTable(0,0, widths, heights);

            //Set the style of table
            table.StylePreset = TableStylePreset.LightStyle1Accent2;

            //Loop the table to fill data
            for (int i = 0; i < heights.Length; i++)
                for (int j = 0; j < widths.Length; j++)
                {                   
                    table[i, j].TextFrame.Text = "Row"+i.ToString()+"Col"+j.ToString();                   
                    table[j, i].TextFrame.Paragraphs[0].TextRanges[0].LatinFont = new TextFont("Arial Narrow");
                    table[i, j].TextFrame.Paragraphs[0].Alignment = TextAlignmentType.Center;
                }

            //Save and Launch
            ppt.SaveToFile("Table.pptx", FileFormat.Pptx2010);
            System.Diagnostics.Process.Start("Table.pptx");

        }
    }
}