com.joybase.DB.dll源代码（4)

/// <summary>
/// 内部保护的数据库连接类
/// </summary>
protected abstract class Provider
{
 //一个静态的连接接口;
 private static System.Data.IDbConnection conn;
 /// <summary>
 /// 构造方法，设为私有类型，是防止外部无效的引用;
 /// </summary>
 protected Provider()
 {
System.Data.IDbCommand x=new System.Data.OleDb.OleDbCommand();
 }
 /// <summary>
 /// 返回数据库边接类型
 /// </summary>
 public static DBType Type
 {
get
{
 
 return Provider.m_DBType;
}
set
{
 Provider.m_DBType=value;
}
 }
 private static string m_ConnectionString;
 private static string m_ConnectionStringSetName;
 /// <summary>
 /// 数据库连接字符串设置名称
 /// </summary>
 public static string ConnectionSetName
 {
set
{
 Provider.m_ConnectionStringSetName=value;
}
 }
 /// <summary>
 /// 数据库连接字符串
 /// </summary>
 public static string ConnectionString
 {
set
{
 Provider.m_ConnectionString=value;
}
 }
 private static DBType m_DBType;
 
 /// <summary>
 /// 获得数据库连接接口
 /// </summary>
 /// <returns>返回一个连接</returns>
 public static System.Data.IDbConnection getConn()
 {
string ConnStr="";
try{
//System.Threading.Thread.GetDomain().UnhandledException+=new UnhandledExceptionEventHandler(ThrowDBException);
 if(Provider.m_ConnectionString==""

关键词：com.joybase.DB.dll源代码（4)