直接代碼吧：

///

/// Oracle數(shù)據(jù)庫(kù)連接

///

/// 數(shù)據(jù)庫(kù)連接串，例如：(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = IP)(PORT = *)))(CONNECT_DATA =(SERVICE_NAME = *)))

/// 用戶名

/// 用戶密碼

/// Oracle數(shù)據(jù)庫(kù)連接對(duì)象

private static OracleConnection ConnectOracle(string path, string user, string psw)

{

OracleConnection oracleConn = new OracleConnection();

string connectionStr = string.Format("Data Source={0};User Id={1};Password={2};", path, user, psw);

oracleConn.ConnectionString = connectionStr;

return oracleConn;

}

///

/// Access數(shù)據(jù)庫(kù)連接

///

/// 數(shù)據(jù)庫(kù)連接串，例如：@"D:\qingdan.accdb;"

/// Access版本，true為高于2007版

/// Access數(shù)據(jù)庫(kù)連接對(duì)象

private static OleDbConnection ConnectOracle(string path,bool flag)

{

OleDbConnection accessConn = null;

if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))

{

MessageBox.Show("Acess數(shù)據(jù)庫(kù)文件不存在", "錯(cuò)誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);

return accessConn;

}

string conStr = null;

if (flag)

{

conStr = "Provider=Microsoft.Ace.OleDb.12.0;";

conStr += "Data Source=" + path;

conStr += ";Persist Security Info=False;";

}

else

{

conStr = "Provider=Microsoft.Jet.OLEDB.4.0;";

conStr += "Data Source=" + path;

}

accessConn = new OleDbConnection(conStr);

return accessConn;

}

以上是建立數(shù)據(jù)庫(kù)連接的方法。

對(duì)Oracle數(shù)據(jù)庫(kù)的查詢操作方法如下：

string sqlTest = "";//此處為查詢SQL

m_dsSet = new DataSet();//查詢結(jié)果集合

OracleDataAdapter command = new OracleDataAdapter(sqlTest, m_oracleConn);

command.Fill(m_dsSet, "ds");

對(duì)Access數(shù)據(jù)庫(kù)操作：

OleDbCommand dbCommand = new OleDbCommand();

dbCommand.Connection = m_accessConn;//連接串

dbCommand.Transaction = m_accessConn.BeginTransaction();

dbCommand.CommandText ="";//操作命令SQL

dbCommand.ExecuteNonQuery();

dbCommand.Transaction.Commit();

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