根据配置文件 将EXCEL中数据读入目标结构的DATASET，并对合并单元格作处理
1、类设计，EXCEL要据配置读入DATASET
using System;
using System.Data;
using System.Collections;
using System.Data.OleDb;
namespace HKH.Common
{
/// <summary>
/// 从Excel导入数据到DataSet，带有虚函数的基类
/// </summary>
/// <remarks>Create By Liwt on 2006 - 09 - 15
/// </remarks>
public class clsImportExcel
{
#region 变量
protected String m_MappingFile; //映射配置文件路径
protected String m_ExcelSheetName; //Excel中要导入数据的表名
protected String m_SqlTableName; //要导入的Sql表名，也可为其它类型的，如Oracle
protected ArrayList[] m_ColumnMapping; //列映射配置列表，包括3部分 0--Sql列名，1--Excel列索引
//2-- 如当前Excel行为空，是否赋值为上一行的值
private bool isLoadMapping;
#endregion
#region 构造函数
/// <summary>
/// 无参构造
/// </summary>
public clsImportExcel()
{
m_MappingFile = "";
m_ExcelSheetName = "";
isLoadMapping = false;
m_ColumnMapping = new ArrayList[3];
m_ColumnMapping[0] = new ArrayList();
m_ColumnMapping[1] = new ArrayList();
m_ColumnMapping[2] = new ArrayList();
}
/// <summary>
/// 构造函数重载
/// </summary>
/// <param name="mappingFilePath">映射配置文件路径</param>
/// <param name="excelSheetName">Excel中要导入数据的表名</param>
public clsImportExcel(String mappingFilePath, String excelSheetName)
{
m_MappingFile = mappingFilePath;
m_ExcelSheetName = excelSheetName;
isLoadMapping = false;
m_ColumnMapping = new ArrayList[3];
m_ColumnMapping[0] = new ArrayList();
m_ColumnMapping[1] = new ArrayList();
m_ColumnMapping[2] = new ArrayList();
}
#endregion
#region 属性
/// <summary>
/// 读取或设置 映射配置文件路径
/// </summary>
public String MappingFilePath
{
get
{
return m_MappingFile;
}
set
{
m_MappingFile = value;
isLoadMapping = false;
}
}
/// <summary>
/// 读取或设置 Excel中要导入数据的表名
/// </summary>
public String ExcelSheetName
{
get
{
return m_ExcelSheetName;
}
set
{
m_ExcelSheetName = value;
isLoadMapping = false;
}
}
#endregion
#region 公共方法
/// <summary>
/// 导入数据
/// </summary>
/// <param name="excelFilePath">要导入的Excel文件路径</param>
/// <param name="dsTarget">目标DataSet</param>
/// <returns>ture -- 成功, false -- 失败
/// </returns>
public bool Import(String excelFilePath,ref DataSet dsTarget)
{
try
{
if (!isLoadMapping)
{
if (!LoadMapping())
{
return false;
}
}
//利用Ole读取Excel数据
OleDbConnection oleConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + excelFilePath + ";");
OleDbDataAdapter oleDA = new OleDbDataAdapter("SELECT * FROM [" + m_ExcelSheetName + "$]",oleConn);
DataSet dsExcel = new DataSet();
oleDA.Fill(dsExcel,m_ExcelSheetName);
oleDA.Dispose();
oleConn.Dispose();
//对建立数据行缓存，以备填充对空单元格进行处理
DataRow tempRow = dsExcel.Tables[m_ExcelSheetName].Rows[0];
for ( int i = 0 ;i<dsExcel.Tables[m_ExcelSheetName].Rows.Count; i ++ )
{
DataRow excelRow = dsExcel.Tables[m_ExcelSheetName].Rows[i];
//调用导入前数据处理函数，并根据返回值确定下一步处理
if (!ImportingBefore(ref excelRow))
{
continue;
}
DataRow sqlNewRow = dsTarget.Tables[0].NewRow();
for ( int j = 0 ;j<m_ColumnMapping[0].Count; j ++ )
{
String sqlColName = m_ColumnMapping[0][j].ToString();
int excelColindex = (int)m_ColumnMapping[1][j];
bool inherit = Convert.ToBoolean(m_ColumnMapping[2][j]);
//如果当前行当前列为空
if (Convert.IsDBNull(excelRow[excelColindex]))
{
//如果允许以临时值填充
if (inherit)
{
sqlNewRow[sqlColName] = tempRow[excelColindex];
}
}
else
{
//填充数据，更新缓存行数据
sqlNewRow[sqlColName] = excelRow[excelColindex];
tempRow[excelColindex] = excelRow[excelColindex];
}
}
//调用导入后数据处理，并根据返回值决定下一步处理
if (ImportingAfter(ref sqlNewRow))
{
dsTarget.Tables[0].Rows.Add(sqlNewRow);
}
}
return true;
}
catch(Exception ex)
{
throw ex;
}
}
#endregion
#region 受保护的虚函数，子类须重写
/// <summary>
/// 在导入前对Excel行数据进行处理
/// </summary>
/// <param name="drExcelRow">正在读取的当前Excel行</param>
/// <returns>true -- 继续处理，false -- 跳过当前行
/// </returns>
protected virtual bool ImportingBefore(ref DataRow drExcelRow)
{
return true;
}
/// <summary>
/// 在数据转存后对当前行进行处理
/// </summary>
/// <param name="drSqlRow">已经转存数据的当前Sql行</param>
/// <returns>true -- 继续处理，false -- 跳过当前行
/// </returns>
protected virtual bool ImportingAfter(ref DataRow drSqlRow)
{
return true;
}
#endregion
#region 私有方法
/// <summary>
/// 加载配置文件，取得表和列的映射
/// </summary>
/// <returns></returns>
private bool LoadMapping()
{
try
{
//清除已过时的配置
m_ColumnMapping[0].Clear();
m_ColumnMapping[1].Clear();
m_ColumnMapping[2].Clear();
if ( null == m_MappingFile || "" == m_MappingFile )
{
throw new Exception("找不到配置文件");
}
//读入配置文件
DataSet dsMaping = new DataSet();
dsMaping.ReadXml(m_MappingFile);
if (dsMaping.Tables.Count == 0)
{
throw new Exception("读取配置文件失败");
}
//读取表映射
DataRow[] tableMap = dsMaping.Tables["TableMapping"].Select("excelSheet='" + m_ExcelSheetName + "'");
if (tableMap.Length != 1)
{
throw new Exception("该Sheet不存在或多次配置");
}
//读取列映射
DataRow[] colMap = dsMaping.Tables["ColumnMapping"].Select("TableMapping_id="+tableMap[0]["TableMapping_id"].ToString());
if ( colMap.Length <= 0)
{
throw new Exception("没有为该表配置列映射");
}
for (int i = 0; i < colMap.Length; i ++)
{
m_ColumnMapping[0].Add(colMap[i]["sqlCol"]);
m_ColumnMapping[1].Add(ExecColumnIndex(colMap[i]["excelCol"].ToString()));
m_ColumnMapping[2].Add(colMap[i]["inherit"]);
}
//设置为已加载配置
isLoadMapping = true;
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 计算EXCEL中列标题对应的索引 （A = 0 ）
/// </summary>
/// <param name="strColumnTitle"></param>
/// <returns></returns>
private int ExecColumnIndex( string strColumnTitle )
{
if ( null == strColumnTitle || "" == strColumnTitle.Trim() )
return -1;
string temp = strColumnTitle.Trim().ToUpper();
if( 2 == temp.Length )
{
// return temp[0] - 65 + 26 + temp[1] - 65;
return temp[0] - 104 + temp[1];
}
else
{
return temp[0] - 65;
}
}
#endregion
}
}
2、配置文件XSD
3、 配置文件样例
excelSheet ----要导入数据库的EXCEL文件中的工作薄名
SQLTABLE---要导入的数据库表名
EXCELCOL--EXCEL表中列标头
SQLCOL--SQL数据库中列名
inherit---当EXCEL中有表格合并时，是否继续上面的单元格值，此处用于拆解单元格，本处指合并行，TRUE为拆解，即所有单元格都以合并值填充，为FALSE则第一行为填充值，其它各行以空填充
<ImportConfiguration>
<TableMapping excelSheet="Sheet1" sqlTable="CNKI_illegalIPInfo">
<ColumnMapping excelCol="A" sqlCol="UnitName" inherit="false"/>
<ColumnMapping excelCol="B" sqlCol="StartIP" inherit="false"/>
<ColumnMapping excelCol="C" sqlCol="EndIP" inherit="false"/>
</TableMapping>
</ImportConfiguration>