将两个列不同的DataTable合并成一个新的DataTable

 #region 两个结构不同的DataTable合并
        /// <summary>    
        /// 将两个列不同的DataTable合并成一个新的DataTable    
        /// </summary>    
        /// <param name="dt1">Table表1</param>    
        /// <param name="dt2">Table表2</param>    
        /// <param name="DTName">合并后新的表名</param>    
        /// <returns></returns>   
        public static DataTable UniteDataTable(DataTable dt1, DataTable dt2, string DTName)
        {
            DataTable dt3 = dt1.Clone();
            for (int i = 0; i < dt2.Columns.Count; i++)
            {
                dt3.Columns.Add(dt2.Columns[i].ColumnName);
            }
            object[] obj = new object[dt3.Columns.Count];

            for (int i = 0; i < dt1.Rows.Count; i++)
            {
                dt1.Rows[i].ItemArray.CopyTo(obj, 0);
                dt3.Rows.Add(obj);
            }

            if (dt1.Rows.Count >= dt2.Rows.Count)
            {
                for (int i = 0; i < dt2.Rows.Count; i++)
                {
                    for (int j = 0; j < dt2.Columns.Count; j++)
                    {
                        dt3.Rows[i][j + dt1.Columns.Count] = dt2.Rows[i][j].ToString();
                    }
                }
            }
            else
            {
                DataRow dr3;
                for (int i = 0; i < dt2.Rows.Count - dt1.Rows.Count; i++)
                {
                    dr3 = dt3.NewRow();
                    dt3.Rows.Add(dr3);
                }
                for (int i = 0; i < dt2.Rows.Count; i++)
                {
                    for (int j = 0; j < dt2.Columns.Count; j++)
                    {
                        dt3.Rows[i][j + dt1.Columns.Count] = dt2.Rows[i][j].ToString();
                    }
                }
            }
            dt3.TableName = DTName;
            return dt3;
        }
        #endregion