C# DataRow 比较

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jiankunking 2022-07-25 22:20:52 博主文章分类：C# ©著作权

文章标签 C# DataRow 比较 taro c# 文章分类 Spark 大数据

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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++;
                }
            }
        }