OleHelper.cs

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using System;
using System.Data;
using System.Data.OleDb;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// ACCESS数据库操作类
/// </summary>
public sealed class OleHelper
{
    public static readonly string connString = System.Configuration.ConfigurationManager.ConnectionStrings["AccessFileName"].ToString();
    public OleHelper()
    {
    }

    #region ExecuteNonQuery
    /// <summary>
    /// 不带参数的ExcuteNonQuery
    /// </summary>
    public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText)
    {
        OleDbCommand cmd = new OleDbCommand();
        using (OleDbConnection conn = new OleDbConnection(connString))
        {
            PrepareCommand(cmd, conn, (OleDbTransaction)null, cmdType, cmdText, (OleDbParameter[])null);
            int val = cmd.ExecuteNonQuery();
            return val;
        }
    }

    /// <summary>
    /// 带参数的ExcuteNonQuery
    /// </summary>
    public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText, params OleDbParameter[] cmdParms)
    {
        OleDbCommand cmd = new OleDbCommand();
        using (OleDbConnection conn = new OleDbConnection(connString))
        {
            PrepareCommand(cmd, conn, (OleDbTransaction)null, cmdType, cmdText, cmdParms);
            int val = cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            return val;
        }
    }
    #endregion ExecuteNonQuery

    #region ExecuteScalar
    /// <summary>
    /// 不带参数的ExecuteScalar
    /// </summary>
    public static object ExecuteScalar(string connString, CommandType cmdType, string cmdText)
    {
        OleDbCommand cmd = new OleDbCommand();