have to delete current row and add dynamically created table

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 GenerateTable(int rowsCount)
{
Table table = new Table();
table.ID = "Table1";
Page.Form.Controls.Add(table);
const int colsCount = 4;
//TableFooterRow footer = new TableFooterRow();
//Button btn = new Button();
//btn.Width = 120;
//btn.Text = "Submit Records";
//btn.Click += new EventHandler(this.OnTestButtonClick);
//cell.Controls.Add(btn);
TableHeaderRow header = new TableHeaderRow();
TableHeaderCell headerTableCell1 = new TableHeaderCell();
headerTableCell1.Text = "Item Name";
header.Cells.Add(headerTableCell1);
TableHeaderCell headerTableCell2 = new TableHeaderCell();
headerTableCell2.Text = "Unit";
header.Cells.Add(headerTableCell2);
TableHeaderCell headerTableCell3 = new TableHeaderCell();
headerTableCell3.Text = "Quantity";
header.Cells.Add(headerTableCell3);
TableHeaderCell headerTableCell4 = new TableHeaderCell();
headerTableCell4.Text = "Rate";
header.Cells.Add(headerTableCell4);
TableHeaderCell headerTableCell5 = new TableHeaderCell();
headerTableCell5.Text = "Total";
header.Cells.Add(headerTableCell5);
table.Rows.Add(header);
connection.Open();
command = new SqlCommand();
command.CommandText = "dbo.sp_Get_Emp";
command.CommandType = CommandType.StoredProcedure;
command.Connection = connection;
command.Parameters.AddWithValue("@registrationId","1014");
da = new SqlDataAdapter(command);
ds = new DataSet();
DataSet dsSecond = new DataSet();
da.Fill(ds, "FirstTab");
da.Fill(ds, "SecondTab");
for (int i = 0; i < rowsCount; i++)
{
TableRow row = new TableRow();
for (int k = colsCount-1;k < colsCount; k++)
{
TableCell cell = new TableCell();                  
DropDownList dr = new DropDownList();
dr.ID = "DropDownList_" + i + "Col_" +k;
dr.DataSource = ds.Tables[0];
dr.DataTextField = "EmpName";
dr.DataValueField = "EmpId";
dr.DataBind();
cell.Controls.Add(dr);
row.Cells.Add(cell);
}
for (int j = 0; j <= colsCount-1; j++)
{
TableCell cell = new TableCell();
TextBox tb = new TextBox();
tb.ID = "TextBoxRow_" + i + "Col_" + j;
cell.Controls.Add(tb);                                      
row.Cells.Add(cell);
}
for (int l = colsCount+1; l < colsCount+2; l++)
{
UpdatePanel uptab = new UpdatePanel();
TableCell cell = new TableCell();
//cell.Controls.Add(this.BuildTestButton()); 
Button button = new Button();
button.Width = 120;
button.Text = "Delete Row";
button.ID = "button" + i+"col"+l;
button.Click += new EventHandler(this.OnTestButtonClick);
uptab.ContentTemplateContainer.Controls.Add(button);
cell.Controls.Add(button);
row.Cells.Add(cell);
}
table.Rows.Add(row);
//footer.Cells.Add(cell);
}
SetPreviousData(rowsCount, colsCount);
rowsCount++;
ViewState["RowsCount"] = rowsCount;
}