C#中DataRow比较示例

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  /// <summary>         /// dataRow比较         /// </summary>         /// <param name="drA"></param>         /// <param name="drB"></param>         /// <param name="columnNames">需要比较的列名称</param>         /// <returns></returns>         public static bool DataRowCompare(DataRow drA, DataRow drB, string[] columnNames)         {             bool flag = false;             //DataRow 中需要比较的列排序             ColumnSort(drA, columnNames);             ColumnSort(drB, columnNames);             foreach (DataColumn dcA in drA.Table.Columns)             {                 if (columnNames.Contains(dcA.ColumnName))                 {                     foreach (DataColumn dcB in drB.Table.Columns)                     {                         if (columnNames.Contains(dcB.ColumnName))                         {                             if (dcB.ColumnName == dcA.ColumnName)//列名比较                             {                                 //类型比较                                 if (dcB.DataType != dcA.DataType)                                 {                                     flag = false;                                     break;                                 }                                 //值比较                                 else if (CompareObject(drA[dcB.ColumnName], drB[dcB.ColumnName]))                                 {                                     flag = true;                                     break;                                 }                             }                         }                     }                 }             }             return flag;         }	     /// <summary>         /// 按照数组中列名顺序排序         /// </summary>         /// <param name="drA"></param>         /// <param name="columnNames">按照数组中列名顺序排序</param>         public static void ColumnSort(DataRow drA, string[] columnNames)         {             //drA 排序             int i = 0;             foreach (string columnName in columnNames)             {                 if (drA.Table.Columns.Contains(columnName))                 {                     drA.Table.Columns[columnName].SetOrdinal(i);                     i++;                 }             }         }

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