复制DataTable

///<summary>
///复制DataTable
///</summary>
public static DataTable CopyTable(DataTable srcTable, string rowFilter, string sort)
{
    if (srcTable == null) return null;
    string oldRowFilter = srcTable.DefaultView.RowFilter;
    srcTable.DefaultView.RowFilter = rowFilter;
    srcTable.DefaultView.Sort = sort;
    DataTable dtDest = srcTable.DefaultView.ToTable();
    srcTable.DefaultView.RowFilter = oldRowFilter;
    return dtDest;
}