合并两个结构完全相同的DataTable

两个结构一模一样的DataTable如何合并？

例子：使用Winform进行演示，表2的数据为固定的，表1的数据可以动态添加，通过合并按钮合并表1和表2的数据到表3

1.规定公共的DataTable结构

        /// <summary>
        /// 构造空的DataTable
        /// </summary>
        /// <returns></returns>
        private DataTable GetEmptyDataTable()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("Id");
            dt.Columns.Add("Name");
            return dt;
        }

2.窗体加载事件中构造表2的数据

  private void Form1_Load(object sender, EventArgs e)
        {
            //构造表2的数据
            DataTable dt2 = this.GetEmptyDataTable();
            DataRow dr = dt2.NewRow();
            dr["Id"] = Guid.NewGuid();
            dr["Name"] = "表二的数据";
            dt2.Rows.Add(dr);
            this.dgv2.DataSource = dt2;            
        }

3.动态添加表1的数据

        /// <summary>
        /// 新增表1数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAddTable1_Click(object sender, EventArgs e)
        {
            this.dgv3.DataSource = null;
            DataTable dtDataSouce = this.dgv1.DataSource as DataTable;
            if (dtDataSouce == null)
            {
                dtDataSouce = this.GetEmptyDataTable();
            }
            DataRow dr = dtDataSouce.NewRow();
            dr["Id"] = Guid.NewGuid();
            dr["Name"] = "第" + dtDataSouce.Rows.Count.ToString() + "条数据";
            dtDataSouce.Rows.Add(dr);
            this.dgv1.DataSource = dtDataSouce;
        }

4.开始合并

        /// <summary>
        /// 合并两2个DataTable
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStartMerge_Click(object sender, EventArgs e)
        {
            //得到表1的数据
            DataTable dt1 = this.dgv1.DataSource as DataTable;
            //得到表二的数据
            DataTable dt2 = this.dgv2.DataSource as DataTable;
            //开始合并（思路：构造空的表dt结构和表1、表2相同 将表1表2的数据添加到dt中）

            //1. 任意选择一个表进行复制
            DataTable dt = dt1.Clone();
            //2.循坏遍历表1
            foreach (DataRow dr in dt1.Rows)
            {
                dt.Rows.Add(dr.ItemArray);
            }
            //3.循环遍历表2
            foreach (DataRow dr in dt2.Rows)
            {
                dt.Rows.Add(dr.ItemArray);
            }
            //此时dt就是表1和表2的合并数据
            this.dgv3.DataSource = dt;
        }

5.演示

源代码下载