Dynamically generate and add rows to ASP.Net Table with TextBoxes on Button Click in ASP.Net

Here I have created sample, in this I have added Rows and Columns to existing Table.

HTML

<div>
    <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Add New Row" />
    <table id="Table1" runat="server" border="0" cellpadding="0" cellspacing="0">
    </table>
</div>

Code

private int numOfRows = 1;

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        GenerateTable(numOfRows);
    }
}

protected void Button1_Click(object sender, EventArgs e)
{
    if (ViewState["RowsCount"] != null)
    {
        numOfRows = Convert.ToInt32(ViewState["RowsCount"].ToString());
        GenerateTable(numOfRows);
    }
}

private void SetPreviousData(int rowsCount, int colsCount)
{
    HtmlTable table = (HtmlTable)Page.FindControl("Table1");
    if (table != null)
    {
        for (int i = 0; i < rowsCount; i++)
        {
            for (int j = 0; j < colsCount; j++)
            {
                TextBox tb = (TextBox)table.Rows[i].Cells[j].FindControl("TextBoxRow_" + i + "Col_" + j);
                tb.Text = Request.Form["TextBoxRow_" + i + "Col_" + j];
            }
        }
    }
}

private void GenerateTable(int rowsCount)
{
    HtmlTable table = (HtmlTable)Page.FindControl("Table1");
    const int colsCount = 3;
    for (int i = 0; i < rowsCount; i++)
    {
        HtmlTableRow row = new HtmlTableRow();
        for (int j = 0; j < colsCount; j++)
        {
            HtmlTableCell cell = new HtmlTableCell();
            TextBox tb = new TextBox();
            tb.ID = "TextBoxRow_" + i + "Col_" + j;
            cell.Controls.Add(tb);
            row.Cells.Add(cell);
        }
        table.Rows.Add(row);
    }
    SetPreviousData(rowsCount, colsCount);
    rowsCount++;
    ViewState["RowsCount"] = rowsCount;
}

Screenshot