两个datatable的比较

/// <summary>
    /// 两个datatable的比较
    /// </summary>
    /// <param name="objA"></param>
    /// <param name="objB"></param>
    /// <returns></returns>
    private bool  ValueEquals(DataTable objA,DataTable objB)
    {
        if(objA != null && objB != null)
        {
              if(objA.Rows.Count != objB.Rows.Count)
              {
                  return false;
              }

              if(objA.Columns.Count != objB.Columns.Count)
              {
                  return false;
              }
        }
      
   
        DataView dv = new DataView(objB);

        string keys = "";

        foreach(DataColumn col in  objA.Columns)
        {
               keys += ","+col.ColumnName;
        }

     
        dv.Sort = keys.Substring(1);

       
        foreach(DataRow row in  objA.Rows)
        {
               if(row.RowState != DataRowState.Deleted)
               {
                   if(dv.Find(row.ItemArray)<0)
                   {
                          return false;
                   }
               }
               else
               {
                   return false;
               }
        }

        return true;

    }