dataset中删除重复数据

代码

   
     

    
      
    
      ///
    
       
    
      <summary>
    
      
 
    
      ///
    
       获取对固定列不重复的新DataTable
 
    
      ///
    
       
    
      </summary>
    
      
 
    
      ///
    
       
    
      <param name="dt">
    
      含有重复数据的DataTable
    
      </param>
    
      
 
    
      ///
    
       
    
      <param name="colName">
    
      需要验证重复的列名
    
      </param>
    
      
 
    
      ///
    
       
    
      <returns>
    
      新的DataTable，colName列不重复，表格式保持不变
    
      </returns>
    
      

    
       
    
      private
    
       DataTable GetDistinctTable(DataTable dt,
    
      string
    
       colName)
 {
 DataView dv 
    
      =
    
       dt.DefaultView;
 DataTable dtCardNo 
    
      =
    
       dv.ToTable(
    
      true
    
      , colName);
 DataTable Pointdt 
    
      =
    
       
    
      new
    
       DataTable();
 Pointdt 
    
      =
    
       dv.ToTable();
 Pointdt.Clear();
 
    
      for
    
       (
    
      int
    
       i 
    
      =
    
       
    
      0
    
      ; i 
    
      <
    
       dtCardNo.Rows.Count; i
    
      ++
    
      )
 {
 DataRow dr 
    
      =
    
       dt.Select(colName 
    
      +
    
       
    
      "
    
      ='
    
      "
    
       
    
      +
    
       dtCardNo.Rows[i][
    
      0
    
      ].ToString() 
    
      +
    
       
    
      "
    
      '
    
      "
    
      )[
    
      0
    
      ];
 Pointdt.Rows.Add(dr.ItemArray);
 }
 
    
      return
    
       Pointdt;
 }
转自：http:
    
      //
    
      www.cnblogs.com/axcozy/archive/2009/12/29/1635496.html