109 lines
3.6 KiB
C#
109 lines
3.6 KiB
C#
using System;
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using System.Data;
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using System.Xml;
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namespace WX.CRM.Common
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{
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public class DataTableHelper
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{
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private DataTable dataTable;
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public DataTable GetDataTable
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{
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get { return dataTable; }
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set { dataTable = value; }
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}
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public DataTableHelper()
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{
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dataTable = new DataTable();
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}
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/// <summary>
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/// 给DataTable添加列
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/// </summary>
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/// <param name="name"></param>
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/// <param name="type"></param>
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public void AddColumn(string name, Type type)
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{
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DataColumn column = new DataColumn();
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column.ColumnName = name;
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column.DataType = type;
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dataTable.Columns.Add(column);
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}
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/// <summary>
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/// 给DataTable添加列(默认string类型)
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/// </summary>
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/// <param name="name"></param>
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public void AddColumn(string name)
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{
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DataColumn column = new DataColumn();
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column.ColumnName = name;
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column.DataType = typeof(System.String);
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dataTable.Columns.Add(column);
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}
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public void LoadData(XmlDocument doc)
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{
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XmlElement root = doc.DocumentElement;
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foreach (XmlNode row in root.ChildNodes)
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{
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DataRow dataRow = dataTable.NewRow();
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foreach (XmlNode item in row.ChildNodes)
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{
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if (dataTable.Columns.Contains(item.Name))
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{
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dataRow[item.Name] = item.InnerText.Trim();
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}
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}
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dataTable.Rows.Add(dataRow);
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}
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}
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/// <summary>
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/// 两个DataTable合并（表结构不一样）
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/// </summary>
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/// <param name="tab1">表1</param>
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/// <param name="tab2">表2</param>
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/// <returns></returns>
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public static DataTable TwoDataTableMerge(DataTable tab1, DataTable tab2)
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{
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//克隆DataTable1的结构
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DataTable newDataTable = tab1.Copy();
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//-------把没有tab2的字段加上去
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foreach (DataColumn column in tab2.Columns)
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{
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if (!newDataTable.Columns.Contains(column.ColumnName))
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{
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//column.Caption = model.EXCEL_COLNAME;
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DataColumn col = new DataColumn(column.ColumnName, column.DataType);
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//if (column.DataType == typeof(System.Decimal))
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// col.DefaultValue = 0;
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col.Caption = column.Caption;
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newDataTable.Columns.Add(col);
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}
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}
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foreach (DataRow row in tab2.Rows)
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{
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DataRow newRow = newDataTable.NewRow();
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foreach (DataColumn column in tab2.Columns)
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{
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newRow[column.ColumnName] = row[column.ColumnName];
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}
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newDataTable.Rows.Add(newRow);
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}
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return newDataTable;
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}
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/// <summary>
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/// 两个DataTable合并（优化版,数据量多的作为基表）
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/// </summary>
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/// <param name="tab1">表1</param>
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/// <param name="tab2">表2</param>
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/// <returns></returns>
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public static DataTable TwoDataTableMergeEfficiency(DataTable tab1, DataTable tab2)
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{
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if (tab2.Rows.Count > tab1.Rows.Count)
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return TwoDataTableMerge(tab2, tab1);
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else
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return TwoDataTableMerge(tab1, tab2);
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}
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}
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}
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