一段欣赏的代码共享
一段代码共享 包括
1类的定义，典型的面向对象思想的实例
2从xml文件中读取数据
3从excel中读取数据
using
System;
using
System.Collections;
using
System.Data;
using
System.Xml;
using
System.Data.OleDb;
namespace
ImportHelper
{
internal class ImportTableInfo
{ private string _name = string.Empty; private string _desc = string.Empty; private ImportColumnInfoCollection _columnInfos = new ImportColumnInfoCollection(); public ImportTableInfo() {
} public string Name { get{ return _name;} set{ _name = value;} } public string Description { get{ return _desc;} set{_desc = value;} } public ImportColumnInfoCollection ColumnInfos { get{ return _columnInfos;} set{_columnInfos = value;} } } internal class ImportColumnInfo { private string _name = string.Empty; private string _desc = string.Empty; private bool _optional = true; public ImportColumnInfo(string Name, string Description, string Optional) { _name = Name; _desc = Description; try { _optional = bool.Parse(Optional); } catch { _optional = false; } } public string Name { get{ return _name;} set{ _name = value;} } public string Description { get{ return _desc;} set{_desc = value;} } public bool Optional { get{ return _optional;} set{_optional = value;} } } internal class ImportColumnInfoCollection:System.Collections.CollectionBase { public ImportColumnInfoCollection() { } public void Add(ImportColumnInfo columnInfo) { this.List.Add(columnInfo); } public ImportColumnInfo this[int i] { get { return (ImportColumnInfo)List[i]; } set { List[i] = value; } } public void Remove(ImportColumnInfo columnInfo) { int i= this.IndexOf(columnInfo); if(i>0 && i<this.Count) { this.RemoveAt(i); } } public int IndexOf(ImportColumnInfo columnInfo) { for(int i=0;i<this.Count;i++) { ImportColumnInfo columnInf = this[i]; if(columnInf == columnInfo || (columnInfo != null && columnInf != null && columnInf.Name == columnInfo.Name)) { return i; } } return -1; } } /**//// <summary> /// 模板的辅助类 /// </summary> internal class TemplateHelper { public TemplateHelper() { } //获得填充数据的ImportTableInfo public static ImportTableInfo GetImportTableInfo(string tblName) { if(tblName==null||tblName.Trim()=="") { throw new ApplicationException("please transfer param!"); } //获取列集合 读取xml文件 string strDicPath=System.Configuration.ConfigurationSettings.AppSettings["ImportDataTemplate"].Trim(); //从web.config文件中获取xml文件所在的目录 string strXmlPath=System.IO.Path.Combine(strDicPath,tblName+".xml"); //模板均以导入目标表 表名来命名 ImportColumnInfoCollection columnColl=new ImportColumnInfoCollection(); XmlDocument xmlDoc=new XmlDocument(); xmlDoc.Load(strXmlPath); XmlNode baseNode=xmlDoc.DocumentElement.SelectSingleNode("/Table[@Name='"+tblName.Trim()+"']"); XmlNodeList nodeList=baseNode.SelectNodes("./Column"); foreach(XmlNode node in nodeList) { if(node!=null) { columnColl.Add(new ImportColumnInfo(node.Attributes["Name"].InnerText.Trim(),node.Attributes["Description"].InnerText.Trim(),node.Attributes["Optional"].InnerText.Trim())); } } ImportTableInfo tblInfo=new ImportTableInfo(); tblInfo.Name=tblName.Trim(); tblInfo.ColumnInfos=columnColl; //tblInfo.Description=desc; return tblInfo; } } /**//// <summary> /// 从Excel中获取数据,并以DataSet的方式返回给调用者 /// Date:2005.01.22 /// </summary> public class ExcelGateway { private System.Data.OleDb.OleDbConnection excelConnection; //excelConnection连接 private string excelConnectionString;//连接字符串 private System.Data.OleDb.OleDbDataAdapter excelAdapter; //执行SQL private System.Data.OleDb.OleDbCommand excelCommand; //执行SQL private DataSet dataSet;//数据集 /**//// <summary> /// 构造函数,实例化的时候创建一个excelConnection对象 /// </summary> /// <param name="strFilePath">Excel的存放路径</param> /// <param name="isQuery">是否对Excel做只读操作</param> public ExcelGateway(string strFilePath,bool isQuery) { //连接字符串 //查询时 if(isQuery) { excelConnectionString="Provider=Microsoft.Jet.OLEDB.4.0; Data Source= "+strFilePath+"; Extended Properties='Excel 8.0;HDR=YES;IMEX=1'"; } //插入更新时 else { excelConnectionString="Provider=Microsoft.Jet.OLEDB.4.0; Data Source= "+strFilePath+"; Extended Properties=Excel 8.0"; } //打开连接 excelConnection=new OleDbConnection(excelConnectionString); } /**//// <summary> /// 打开Excel数据库连接 /// </summary> public void Open() { //如果当前对象存在 if(excelConnection!=null) { excelConnection.Open(); } } /**//// <summary> /// 关闭Excel数据库连接 /// </summary> public void Close() { //如果当前对象存在 if(excelConnection!=null) { excelConnection.Close(); } } /**//// <summary> /// 以DataSet的方式返回Excel中的数据 /// </summary> /// <param name="sql">查询的SQL</param> /// <returns>返回结果集</returns> public DataSet ExcuteSqlForDst(string sql) { //实例化Adapter类 excelAdapter=new OleDbDataAdapter(sql,excelConnection); //数据集 dataSet=new DataSet(); //填充dataSet excelAdapter.Fill(dataSet); //返回dataSet return(dataSet); } /**//// <summary> /// 通过传递参数的方式,执行Sql语句 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="SqlParameter">参数</param> /// <param name="SqlParameterValue">参数值</param> /// <returns></returns> public DataSet ExcuteParameterSqlForDst(string sql,string[] SqlParameter,object[] SqlParameterValue) { DataSet ds=new DataSet(); excelAdapter=new OleDbDataAdapter(); if(SqlParameter.Length==SqlParameterValue.Length) { excelCommand=new OleDbCommand(); //对于每一个参数,直接匹配 for(int i=0;i<SqlParameter.Length;i++) { OleDbParameter para=new OleDbParameter(); excelCommand.Connection=excelConnection;//数据库连接 para.ParameterName=SqlParameter[i]; //参数名 para.Value=SqlParameterValue[i]; //参数值 excelCommand.Parameters.Add(para); //增加参数 } try { excelAdapter.SelectCommand=excelCommand; excelAdapter.Fill(ds); return(ds); } catch { throw new Exception("获取数据出错!"); } } else { throw new Exception("给定的参数和参数值不匹配！"); } } /**//// <summary> /// 执行不需要返回值的SQL语句,比如插入,删除操作 /// 如不能正确执行,回滚操作,并抛出失败异常 /// 如果回滚失败,抛出回滚失败异常 /// </summary> /// <param name="sql">待执行的SQL</param> public void ExecuteNoquery(string sql) { try { //实例化Adapter类 excelCommand=new OleDbCommand(sql,excelConnection); excelCommand.Transaction=excelConnection.BeginTransaction(); excelCommand.ExecuteNonQuery(); try { excelCommand.Transaction.Commit(); } catch { try { excelCommand.Transaction.Rollback(); } catch { throw new Exception("数据库事务回滚失败！"); } } } catch(Exception ex) { throw new Exception(ex.Message); } } }
}
附：
1读取的xml文件
<?
xml version
=
"
1.0
"
encoding
=
"
utf-8
"
?>
<!--
配置注意事项
1
,
<
Table Name
=
"
TblName
"
>
中Name的值为导入数据的目标表的表名
2
,
<Column Name="Account" Description="帐号" Optional="False" />
为导入数据的列，Name 是字段名，Description是描述,Optional为True该列数据是可为空
-->
<
Table Name
=
"
TblName
"
>
<
Column Name
=
"
Account
"
Description
=
"帐号
"
Optional
=
"
False
"
/>
<
Column Name
=
"
UserName
"
Description
=
"用户名
"
Optional
=
"
False
"
/>
<
Column Name
=
"
Password
"
Description
=
"
密码
"
Optional
=
"
False
"
/> <Column Name="Department" Description="部门" Optional="False" />
</
Table
>
2使用ExcelGateway类的代码
private
void
lbtnImport_Click(
object
sender, System.EventArgs e)
{ string suffix = System.IO.Path.GetExtension(this.UpLoadFile.PostedFile.FileName); //UpLoadFile是file类型html控件，取得读取文件的扩展名，以判断是否是excel文件 if(suffix.Trim().ToUpper() != ".XLS" && suffix.Trim().ToUpper() != ".XLT") { Function.PageAlert("文件类型不正确"); //公用方法弹出提示信息 return; } string onlyFileName = System.IO.Path.GetFileName(this.UpLoadFile.PostedFile.FileName); string uploadFilePath = System.Configuration.ConfigurationSettings.AppSettings["UploadFilePath"];//文件上传到服务器的目录 if(!System.IO.Directory.Exists(uploadFilePath)) { System.IO.Directory.CreateDirectory(uploadFilePath); } string savedFilePath = System.IO.Path.Combine(uploadFilePath,onlyFileName); this.UpLoadFile.PostedFile.SaveAs(savedFilePath); //把excel文件上传到服务器 string[] sheetNames = this.txtSheetName.Text.Trim().Split(new char[',']);//excel的sheet try { string sql=""; ExcelGateway excelG = new ExcelGateway(savedFilePath,true); excelG.Open(); try { for(int i=0;i<sheetNames.Length;i++) { sql=string.Format("SELECT * FROM [{0}$]",sheetNames[i]); DataSet ds = excelG.ExcuteSqlForDst(sql);//获取到数据填充到DataSet } // InvbitWrapper bitWrapper = new InvbitWrapper(); // bitWrapper.ImportInvBitData(ds); } finally { excelG.Close(); } } catch(Exception ex) { Function.PageAlert(ex.ToString()); } }