选中复选框时，将选定的行从一个显示到另一个网格视图

Question

当选中复选框时，gridview值来自Excel工作表我希望在单击按钮时将这些行显示到另一个gridview中

protected void Button1_Click(object sender, EventArgs e)
{

    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[5] { new DataColumn("Name of the Chemical "), new DataColumn("Grade"), new DataColumn("Quantity"), new DataColumn("Price in"), new DataColumn("Total") });
    foreach (GridViewRow row in GridView1.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
        {
            CheckBox chkSelect = (row.Cells[0].FindControl("chkSelect") as CheckBox);
            if (chkSelect.Checked)
            {
                string name = row.Cells[1].Text;
                string grade = row.Cells[2].Text;


               // int quantity = Convert.ToInt32((row.Cells[3].FindControl("Quantity") as TextBox));
                //Decimal price = Convert.ToInt32(row.Cells[4].Text);
                //Decimal price = Convert.ToDecimal(row.Cells[4]);
                //Decimal total = Convert.ToDecimal(row.Cells[5]);
               // Convert.ToInt32(GridView1.Rows[rowIndex].Cells[0].Text)
                //string country = (row.Cells[2].FindControl("lblCountry") as Label).Text;
                dt.Rows.Add(name, grade);
            }
        }
    }
    GridView2.DataSource = dt;
    GridView2.DataBind();
    //gvSelected.DataSource = dt;
    //gvSelected.DataBind();
}