SetInitialRowToGrid();
        int rowIndex = 0;

        if (ViewState["TempTable"] != null)
        {
            // Get TempTable from viewstate
            var tempTable = (DataTable)ViewState["TempTable"];
            DataRow tempRow = null;

            if (tempTable.Rows.Count > 0)
            {
                for (int i = 1; i <= tempTable.Rows.Count; i++)
                {
                    // Get Grid's Label values
                    var EmpID =
                        (Label)grdEmp.SelectedRow.FindControl("lblEmpID");
                    var firstName =
                        (Label)grdEmp.SelectedRow.FindControl("lblFirstName");

                    var date = DateTime.Now.ToString();

                    //var planID =
                    //    (Label)grdPlanID.Rows[rowIndex].Cells[1].FindControl("lblPlanID");

                    // Create new row and update Row Number
                    tempRow = tempTable.NewRow();

                    tempTable.Rows[0]["Emp_ID"] = EmpID.Text;
                    tempTable.Rows[i - 1]["First_Name"] = firstName.Text;
                    tempTable.Rows[i - 1]["Created_Time"] = date;
                    //tempTable.Rows[i - 1]["Plan_ID"] = planID.Text;

                    rowIndex++;
                }

                // Add data to datatable and viewstate
                tempTable.Rows.Add(tempRow);
                ViewState["TempTable"] = tempTable;

                // Attach Gridview Datasource to datatable
                grdList.DataSource = tempTable;
                grdList.DataBind();
            }
        }

        //Set Previous Data on Postbacks
        SetPreviousData();

private void SetInitialRowToGrid()
    {
        // Initialize and Set initial row of Datatable
        var tempDataTable = new DataTable();
        tempDataTable.Columns.Add("Emp_ID");
        tempDataTable.Columns.Add("First_Name");
        tempDataTable.Columns.Add("Created_Time");
        tempDataTable.Columns.Add("Plan_ID");
        tempDataTable.Rows.Add("1", "", "", "");

        // Store that datatable into viewstate
        ViewState["TempTable"] = tempDataTable;

        // Attach Gridview Datasource to datatable
        grdList.DataSource = tempDataTable;
        grdList.DataBind();
    }

private void SetPreviousData()
    {
        int rowIndex = 0;

        if (ViewState["TempTable"] != null)
        {
            var tempTable = (DataTable)ViewState["TempTable"];

            if (tempTable.Rows.Count > 0)
            {
                for (int i = 0; i < tempTable.Rows.Count; i++)
                {
                    var EmpID =
                        (Label)grdEmp.SelectedRow.FindControl("lblEmpID");
                    var firstName =
                        (Label)grdEmp.SelectedRow.FindControl("lblFirstName");

                    var date = DateTime.Now.ToString();

                    var planID =
                        (Label)grdList.Rows[rowIndex].Cells[1].FindControl("lblPlanID");

                    EmpID.Text = tempTable.Rows[i]["Emp_ID"].ToString();
                    firstName.Text = tempTable.Rows[i]["First_Name"].ToString();
                    date = tempTable.Rows[i]["Created_Time"].ToString();
                    planID.Text = tempTable.Rows[i]["Plan_ID"].ToString();

                    rowIndex++;
                }
            }
        }
    }