通过一个button将一个gridview中的数据导入到另一个gridview中

protected void Page_Load(object sender, EventArgs e)
    {
        GridView1.DataSource = GetDataTable();
        GridView1.DataBind();
    }
    DataTable GetDataTable()
    {
        DataTable dt = new DataTable("cart");
        DataColumn dc1 = new DataColumn("prizename", Type.GetType("System.String"));
        DataColumn dc2 = new DataColumn("point", Type.GetType("System.Int16"));
        DataColumn dc3 = new DataColumn("number", Type.GetType("System.Int16"));
        DataColumn dc4 = new DataColumn("totalpoint", Type.GetType("System.Int64"));
        DataColumn dc5 = new DataColumn("prizeid", Type.GetType("System.String"));
        dt.Columns.Add(dc1);
        dt.Columns.Add(dc2);
        dt.Columns.Add(dc3);
        dt.Columns.Add(dc4);
        dt.Columns.Add(dc5);
        //以上代码完成了DataTable的构架，但是里面是没有任何数据的
        for (int i = 0; i < 10; i++)
        {
            DataRow dr = dt.NewRow();
            dr["prizename"] = "娃娃" + i.ToString();
            dr["point"] = 10 + i;
            dr["number"] = i;
            dr["totalpoint"] = 10 + i;
            dr["prizeid"] = "00" + i.ToString();
            dt.Rows.Add(dr);
        }
        return dt;
    }