OleDbHelper.cs

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using System;
using System.Data;
using System.Web;
using System.Configuration;
using System.Data.OleDb;
/// <summary>
/// 
/// </summary>
public class OleDbHelper
{
    protected static string connectionString=ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
    public OleDbHelper()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }

    /// <summary> 
    /// 执行OleDb查询语句 
    /// </summary> 
    /// <param name="OleDbstr">传入的OleDb语句</param> 
    public static void ExecuteSql(string sqlstr)
    {
        using (OleDbConnection connection = new OleDbConnection(connectionString))
        {
            using (OleDbCommand cmd = new OleDbCommand())
            {
                try
                {
                    connection.Open();
                    cmd.Connection = connection;
                    cmd.CommandText = sqlstr;
                    cmd.ExecuteNonQuery();
                }
                catch (Exception E)
                {
                    if (connection.State == ConnectionState.Open)
                    {
                        connection.Close();
                    }
                    throw new Exception(E.Message);
                }
            }
        }
    }
    public static Boolean ExecuteNonQuery(string sqlstr, OleDbParameter[] parm)
    {
        Boolean b = false;
        using (OleDbConnection connection = new OleDbConnection(connectionString))
        {
            using (OleDbCommand cmd = new OleDbCommand())
            {
                try
                {
                    connection.Open();
                    cmd.Connection = connection;
                    cmd.CommandText = sqlstr;
                    foreach (OleDbParameter parmitem in parm)
                    {