lserp_cs_6.0/其他程序/xNewMyFormDesigner/Util/extend/DataTableExtend.cs

/******************************
* 说明：DataTable相关扩展方法
* 创建人：龚宇超
* 创建日期：2017-11-15
* 修改人：
* 修改日期：
* 修改备注：
* 版本：1.0.0.0
******************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;

namespace Lskj.Util
{
    /// <summary>
    /// DataTable相关扩展方法
    /// </summary>
    public static class DataTableExtend
    {
        /// <summary>
        /// <para>说明：移除DataTable中DataRow空白行</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2017-11-15 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="rows">The rows.</param>
        public static DataTable TrimEmptyRows(this DataTable table)
        {
            //GridView.DeleteSelectedRows()只是改变了数据状态为delete,数据依然存在于table中需要更新
            table.AcceptChanges();
            if (table == null) return table;

            int rowCount = table.Rows.Count;
            for (int i = rowCount - 1; i > 0; i--)
            {
                bool isNull = true;
                DataRow item = table.Rows[i];
                for (int j = 0; j < table.Columns.Count; j++)
                {
                    DataColumn col = table.Columns[j];
                    if (!string.IsNullOrWhiteSpace(item[col.ColumnName] + ""))
                    {
                        isNull = false;
                        break;
                    }
                }
                if (isNull)
                {
                    table.Rows.Remove(item);
                }
            }
            return table;
        }
        /// <summary>
        /// <para>说明：移除DataTable中已删除的行</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2017-11-30 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="table">The table.</param>
        /// <returns>DataTable.</returns>
        public static DataTable TrimDeleteRows(this DataTable table)
        {
            if (table == null || table.Rows.Count == 0) return table;

            DataRow[] deleteRows = table.Rows.Cast<DataRow>().Where(x => x.RowState == DataRowState.Deleted).ToArray();

            for (int i = 0; i < deleteRows.Length; i++)
            {
                table.Rows.Remove(deleteRows[i]);
            }
            return table;
        }
        /// <summary>
        /// <para>说明：按field排序DataTable</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2017-11-30 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="table">The table.</param>
        /// <param name="field">The field.</param>
        /// <returns>DataTable.</returns>
        public static DataTable OrderBy(this DataTable table, string field)
        {
            if (table == null || table.Rows.Count == 0 || string.IsNullOrEmpty(field) || !table.Columns.Contains(field)) return table;

            table.AcceptChanges();
            table = table.TrimDeleteRows();

            for (int i = 0; i < table.Rows.Count; i++)
            {
                table.Rows[i][field] = (i + 1);
            }

            return table;
        }
        /// <summary>
        /// <para>说明：按配置条件排序DataTable</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期：2020-07-03 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="table">The table.</param>
        /// <param name="field">The field.</param>
        /// <returns>DataTable.</returns>
        public static DataTable OrderBy(this DataTable table, string field, string UpperFieldName, int RowHandle)
        {
            if (table == null || table.Rows.Count == 0 || string.IsNullOrEmpty(field) || !table.Columns.Contains(field)) return table;

            table.AcceptChanges();
            table = table.TrimDeleteRows();
            if (RowHandle == 0)
            {
                for (int i = RowHandle; i < table.Rows.Count; i++)
                {
                    if (string.IsNullOrEmpty(table.Rows[i][UpperFieldName] + "")) continue;
                    table.Rows[i+1][field] = table.Rows[i][UpperFieldName];
                }
            }
            else
            {
                for (int i = RowHandle; i < table.Rows.Count; i++)
                {
                    if (string.IsNullOrEmpty(table.Rows[i - 1][UpperFieldName] + "")) continue;
                    table.Rows[i][field] = table.Rows[i - 1][UpperFieldName];
                }
            }
            return table;
        }
    }
}