/*******************************************************************************
 * Copyright(c) 2012 dongke All rights reserved. / Confidential
 * 类的信息：
 *      1.程序名称：OperateXmlUtility.cs
 *      2.功能描述：操作XML的共通类
 *      3.函数/方法列表：
 * 编辑履历：
 *      作者            日期                版本            修改内容
 *      欧阳涛          2013/01/08          1.00            k新建
 *******************************************************************************/

using System;
using System.Data;
using System.IO;

namespace Dongke.IBOSS.PRD.Basics.Library
{
    /// <summary>
    /// 作XML的共通类
    /// </summary>
    public class OperateXmlUtility
    {
        public OperateXmlUtility()
        {
            // 
            // 在此处添加构造函数逻辑 
            // 
        }

        /// <summary>
        /// 读取xml直接返回DataSet
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <returns>DataSet</returns>
        public static DataSet GetDataSetByXml(string xmlPath)
        {
            try
            {
                if (!File.Exists(xmlPath))
                {
                    return null;
                }
                DataSet dataSet = new DataSet();
                dataSet.ReadXml(xmlPath);
                if (dataSet.Tables.Count > 0)
                {
                    return dataSet;
                }
                return null;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 读取Xml返回一个经排序或筛选后的DataView
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <param name="filterConditions">筛选条件,如："name = ＇kgdiwss＇" </param>
        /// <param name="sort">排序条件,如："Id desc" </param>
        /// <returns></returns>
        public static DataView GetDataViewByXml(string xmlPath, string filterConditions, string sort)
        {
            try
            {
                if (!File.Exists(xmlPath))
                {
                    return null;
                }

                DataSet dataSet = new DataSet();
                dataSet.ReadXml(xmlPath);
                DataView dataView = new DataView(dataSet.Tables["MessageDetail"]);
                if (!string.IsNullOrEmpty(sort))
                {
                    dataView.Sort = sort;
                }
                if (!string.IsNullOrEmpty(filterConditions))
                {
                    dataView.RowFilter = filterConditions;
                }
                return dataView;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 向Xml文件插入一行数据
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <param name="columns">要插入行的列名数组,如：string[] Columns = {"name","IsMarried"};</param>
        /// <param name="columnValue">要插入行每列的值数组,如：string[] ColumnValue={"明天去要饭","false"}; </param>
        /// <returns>成功返回true,否则返回false </returns>
        public static bool InsertIntoXml(string xmlPath, string[] columns, string[] columnValue)
        {
            try
            {
                if (string.IsNullOrEmpty(xmlPath))
                {
                    return false;
                }
                DataSet dataSet;
                // 没有文件，则新建文件
                if (!File.Exists(xmlPath))
                {
                    // 文件夹不存在，则创建文件夹
                    if (!Directory.Exists(LocalPath.MessagePath))
                    {
                        Directory.CreateDirectory(LocalPath.MessagePath);
                    }
                    File.Create(xmlPath).Close();
                    dataSet = new DataSet("Message");
                    DataTable newDataTable = new DataTable("MessageDetail");
                    newDataTable.Columns.Add("SenderID", typeof(int));
                    newDataTable.Columns.Add("Sender", typeof(string));
                    newDataTable.Columns.Add("ReceiverID", typeof(int));
                    newDataTable.Columns.Add("Receiver", typeof(string));
                    newDataTable.Columns.Add("Content", typeof(string));
                    newDataTable.Columns.Add("Font", typeof(string));
                    newDataTable.Columns.Add("Color", typeof(string));
                    newDataTable.Columns.Add("SendTime", typeof(DateTime));
                    dataSet.Tables.Add(newDataTable);
                }
                else
                {
                    dataSet = new DataSet();
                    dataSet.ReadXml(xmlPath);

                }
                DataTable dataTable = dataSet.Tables["MessageDetail"];
                // 在原来的表格基础上创建新行 
                DataRow newRow = dataTable.NewRow();

                // 循环给一行中的各个列赋值 
                for (int i = 0; i < columns.Length; i++)
                {
                    newRow[columns[i]] = columnValue[i];
                }
                dataTable.Rows.Add(newRow);
                dataTable.AcceptChanges();
                dataSet.AcceptChanges();
                dataSet.WriteXml(xmlPath, XmlWriteMode.WriteSchema);
                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 通过删除DataSet中iDeleteRow这一行,然后重写Xml以实现删除指定行 
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <param name="deleteRowIndex">要删除的行在DataSet中的Index值 </param>
        /// <returns>成功返回true,否则返回false</returns>
        public static bool DeleteXmlRowByIndex(string xmlPath, int deleteRowIndex)
        {
            try
            {
                if (!File.Exists(xmlPath))
                {
                    return false;
                }
                DataSet dataSet = new DataSet();
                dataSet.ReadXml(xmlPath);
                if (dataSet.Tables["MessageDetail"].Rows.Count > 0)
                {
                    //删除符号条件的行 
                    dataSet.Tables["MessageDetail"].Rows[deleteRowIndex].Delete();
                }
                dataSet.WriteXml(xmlPath);
                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 删除column列中值为columnValue的行
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <param name="column">列名</param>
        /// <param name="columnValue">column列中值为columnValue的行均会被删除</param>
        /// <returns>成功返回true,否则返回false</returns>
        public static bool DeleteXmlRows(string xmlPath, string column, string[] columnValue)
        {
            try
            {
                if (!File.Exists(xmlPath))
                {
                    return false;
                }
                DataSet dataSet = new DataSet();
                dataSet.ReadXml(xmlPath);

                //先判断行数 
                if (dataSet.Tables["MessageDetail"].Rows.Count > 0)
                {
                    //判断行多还是删除的值多,多的for循环放在里面 
                    if (columnValue.Length > dataSet.Tables["MessageDetail"].Rows.Count)
                    {
                        for (int i = 0; i < dataSet.Tables["MessageDetail"].Rows.Count; i++)
                        {
                            for (int j = 0; j < columnValue.Length; j++)
                            {
                                if (dataSet.Tables["MessageDetail"].Rows[i][column].ToString().Trim().Equals(columnValue[j]))
                                {
                                    dataSet.Tables["MessageDetail"].Rows[i].Delete();
                                }
                            }
                        }
                    }
                    else
                    {
                        for (int j = 0; j < columnValue.Length; j++)
                        {
                            for (int i = 0; i < dataSet.Tables["MessageDetail"].Rows.Count; i++)
                            {
                                if (dataSet.Tables["MessageDetail"].Rows[i][column].ToString().Trim().Equals(columnValue[j]))
                                {
                                    dataSet.Tables["MessageDetail"].Rows[i].Delete();
                                }
                            }
                        }
                    }
                    dataSet.WriteXml(xmlPath);
                }
                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 删除所有行
        /// </summary>
        /// <param name="xmlPath">xml文件绝对路径</param>
        /// <returns>成功返回true,否则返回false</returns>
        public static bool DeleteXmlAllRows(string xmlPath)
        {
            try
            {
                if (!File.Exists(xmlPath))
                {
                    return false;
                }

                DataSet dataSet = new DataSet();
                dataSet.ReadXml(xmlPath);
                // 如果记录条数大于0 
                if (dataSet.Tables["MessageDetail"].Rows.Count > 0)
                {
                    // 移除所有记录 
                    dataSet.Tables["MessageDetail"].Rows.Clear();
                }
                // 重新写入，这时XML文件中就只剩根节点了 
                dataSet.WriteXml(xmlPath);
                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }
}