asp.net(C#) Access 数据操作类

using system;
using system.configuration;
using system.data;
using system.data.oledb;
using system.xml;
using system.collections;
namespace website.command
{
/// <summary>
/// wsplus 的摘要说明。
/// </summary>
public class accessclass : system.web.ui.page
{
private static oledbconnection sconn = null;
public static string _returnvalue = "0";
public wsplus()
{
//
// todo: 在此处添加构造函数逻辑
//
sconn = new oledbconnection("provider="microsoft.jet.oledb.4.0;data" source=" + server.mappath("/..db.mdb") + ";");
}
/// <summary>
///开启数据
/// </summary>
private static void connopen()
{
if (sconn.state="=connectionstate.closed)"
try
{
sconn.open();
}
catch (exception ex)
{
throw new exception("数据库初始化错误!!!"+ex.message);
}
}
/// <summary>
/// 关闭数据库
/// </summary>
public void connclose()
{
if (sconn.state ="=" connectionstate.open)
try
{
sconn.close();
}
catch (exception ex)
{
throw new exception("oledb close error!"+ex.message);
}
}
/// <summary>
/// 存储过程型cmd初始化!
/// </summary>
/// <param name="ht"></param>
/// <param name="scmd"></param>
/// <param name="proc"></param>
private static void configcmd(hashtable ht,oledbcommand scmd,string sqls)
{
if (scmd ="=" null) throw new argumentexception("scmd未初始化");
if (ht != null && ht.count != 0)
{
idictionaryenumerator items = ht.getenumerator();
while (items.movenext())
scmd.parameters.add(makeparam(items.key.tostring(),items.value.tostring()));
}
scmd.connection = sconn;
scmd.commandtext = sqls;
}
private static void configcmd(arraylist alist,oledbcommand scmd,string sqls)
{
if (scmd ="=" null) throw new argumentexception("scmd未初始化");
if (alist != null && alist.count != 0)
{
foreach (object items in alist)
{
command.model.typefiles cmt = (command.model.typefiles)items;
scmd.parameters.add(makeparam(cmt.fkey.tostring(),cmt.fvalue1.tostring(),cmt.fvalue2.tostring()));
}
}
scmd.connection = sconn;
scmd.commandtext = sqls;
}
private static oledbparameter makeparam(string key,string value)
{
return new oledbparameter(key,value);
}
private static oledbparameter makeparam(string key,string f1,string f2)
{
oledbparameter par = null;
if (f2.toupper() ="=" "string")
{
par = new oledbparameter(key,oledbtype.varchar);
}
else if (f2.toupper() ="=" "integer")
{
par = new oledbparameter(key,oledbtype.integer);
}
else if (f2.toupper() ="=" "lstring")
{
par = new oledbparameter(key,oledbtype.longvarchar);
}

// try
// {
par.value = f1;
// }
// catch(exception e)
// {
// throw new exception(e.message + " " + key + " " + f1 + " " + f2);
// }
return par;
}
public void execconfig(hashtable ht,string sqls)
{
oledbcommand cmd="new oledbcommand();
connopen();
configcmd(ht,cmd,sqls);
executenonquery(cmd);
}
public void execconfig(arraylist alist,string sqls)
{
oledbcommand cmd="new oledbcommand();
connopen();
configcmd(alist,cmd,sqls);
executenonquery(cmd);
}
/// <summary>
/// 数据操作
/// </summary>
/// <param name="cmd"></param>
private static void executenonquery(oledbcommand cmd)
{
command.accessclass cw = new accessclass();

try
{
_returnvalue = cmd.executenonquery().tostring();
}
catch (exception e) {throw new exception("run exec error!"+e.message);}
finally
{
cmd.parameters.clear();

cw.connclose();
}
}
/// <summary>
/// sql语句型datatable
/// </summary>
/// <param name="sqls"></param>
/// <returns></returns>
public datatable returndatatablebysql(hashtable ht,string sqls)
{
datatable dt="new datatable();
oledbcommand cmd="new oledbcommand();
configcmd(ht,cmd,sqls);
oledbdataadapter sda="new oledbdataadapter(cmd);
sda.fill(dt);
cmd.parameters.clear();

return dt;
}
public oledbdatareader getreader(hashtable ht,string sqls)
{
connopen();
oledbcommand cmd="new oledbcommand();
configcmd(ht,cmd,sqls);
oledbdatareader reader = cmd.executereader();
return reader;

//reader.close();
//cmd.parameters.clear();
//connclose();
}
public oledbdatareader getreader(arraylist alist,string sqls)
{
connopen();
oledbcommand cmd="new oledbcommand();
configcmd(alist,cmd,sqls);
oledbdatareader reader = cmd.executereader();
return reader;

//reader.close();
//cmd.parameters.clear();
//connclose();
}

public string returnvalue
{
get
{
return _returnvalue;
}
set
{
_returnvalue = value;
}
}
}
}