C# 能连接4种数据库(外加文件操作)DatabaseHelp 类-优快云博客

首先在工程中引用各种数据库组件.
包括:SqlServer,OleDb,Oracle,ODBC.
调用方法很简单,在创建该类的实例对象时初始化connectionstring数据库连接字符串即可.
该类提供了几种初始化重载方法,可以直接将连接字符串传入,或者通过web.config配置文件ConnectionStrings["connectionstring"].可以直接指明数据库类型,也可以不指明(该类有自动分析功能).

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Configuration;
using System.Data.Common;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data.Odbc;
using System.Data.OracleClient;
using System.IO;

/// <summary>
/// DatebaseHelper 的摘要说明
/// </summary>
public class DatebaseHelper
{
    public class DatabaseHelper : IDisposable
    {
        private string strConnectionString;
        private DbConnection objConnection;
        private DbCommand objCommand;
        private DbProviderFactory objFactory = null;
        private bool boolHandleErrors;
        private string strLastError;
        private bool boolLogError;
        private string strLogFile;

        public DatabaseHelper(string connectionstring, Providers provider)
        {
            strConnectionString = connectionstring;
            switch (provider)
            {
                case Providers.SqlServer:
                    objFactory = SqlClientFactory.Instance;
                    break;
                case Providers.OleDb:
                    objFactory = OleDbFactory.Instance;
                    break;
                case Providers.Oracle:
                    objFactory = OracleClientFactory.Instance;
                    break;
                case Providers.ODBC:

转载于:https://www.cnblogs.com/Hdsome/archive/2011/04/02/2003210.html