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C#²Ù×÷AccessÀà Re

using System;
using System.Data;
using System.Data.OleDb;
namespace AccessDb
{
/**//// <summary>
/// AccessDb µÄժҪ˵Ã÷£¬ÒÔÏÂÐÅÏ¢ÇëÍêÕû±£Áô
/// ÇëÔÚÊý¾Ý´«µÝÍê±Ïºóµ÷ÓÃClose()·½·¨£¬¹Ø±ÕÊý¾ÝÁ´½Ó¡£
/// </summary>
public class AccessDbClass
{
±äÁ¿ÉùÃ÷´¦#region ±äÁ¿ÉùÃ÷´¦
public OleDbConnection Conn;
public string ConnString;//Á¬½Ó×Ö·û´®
#endregion
¹¹Ô캯ÊýÓëÁ¬½Ó¹Ø±ÕÊý¾Ý¿â#region ¹¹Ô캯ÊýÓëÁ¬½Ó¹Ø±ÕÊý¾Ý¿â
/**//// <summary>
/// ¹¹Ô캯Êý
/// </summary>
/// <param name="Dbpath">ACCESSÊý¾Ý¿â·¾¶</param>
public AccessDbClass(string Dbpath)
{
ConnString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
ConnString += Dbpath;
Conn = new OleDbConnection(ConnString);
Conn.Open();
}
/**//// <summary>
/// ´ò¿ªÊý¾ÝÔ´Á´½Ó
/// </summary>
/// <returns></returns>
public OleDbConnection DbConn()
{
Conn.Open();
return Conn;
}
/**//// <summary>
/// ÇëÔÚÊý¾Ý´«µÝÍê±Ïºóµ÷Óøú¯Êý£¬¹Ø±ÕÊý¾ÝÁ´½Ó¡£
/// </summary>
public void Close()
{
Conn.Close();
}
#endregion
Êý¾Ý¿â»ù±¾²Ù×÷#region Êý¾Ý¿â»ù±¾²Ù×÷
/**//// <summary>
/// ¸ù¾ÝSQLÃüÁî·µ»ØÊý¾ÝDataTableÊý¾Ý±í,
/// ¿ÉÖ±½Ó×÷ΪdataGridViewµÄÊý¾ÝÔ´
/// </summary>
/// <param name="SQL"></param>
/// <returns></returns>
public DataTable SelectToDataTable(string SQL)
{
OleDbDataAdapter adapter = new OleDbDataAdapter();
OleDbCommand command = new OleDbCommand(SQL, Conn);
adapter.SelectCommand = command;
DataTable Dt = new DataTable();
adapter.Fill(Dt);


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//====================================================================
using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlTypes;
using System.Data.SqlClient;
using Microsoft.Sq ......
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