DataView 转成DataTable

        public DataTable CreateTable(DataView obDataView)
        {
            if (null == obDataView)
            {
                throw new ArgumentNullException
                    ("DataView", "Invalid DataView object specified");
            }

            DataTable obNewDt = obDataView.Table.Clone();
            int idx = 0;
            string [] strColNames = new string[obNewDt.Columns.Count];
            foreach (DataColumn col in obNewDt.Columns)
            {
                strColNames[idx++] = col.ColumnName;
            }

            IEnumerator viewEnumerator = obDataView.GetEnumerator();
            while (viewEnumerator.MoveNext())
            {
                DataRowView drv = (DataRowView)viewEnumerator.Current;
                DataRow dr = obNewDt.NewRow();
                try
                {
                    foreach (string strName in strColNames)
                    {
                        dr[strName] = drv[strName];
                    }
                }
                catch (Exception ex)
                {
                    throw new Exception("DataView create table error!");
                }
                obNewDt.Rows.Add(dr);
            }

            return obNewDt;
        }