用OracleConnection连接Oracle

在Web.config中配置

public System.Data.OracleClient.OracleConnection cnn;

///

/// 打开数据库连接

///

public void Open()

{

cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);

cnn.Open();

}

///

/// 打开数据库连接，返回cnn

///

public OracleConnection OpenCnn()

{

cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);

cnn.Open();

return(cnn);

}

///

/// 关闭数据库连接

///

public void Close()

{

cnn.Close();

}

///

/// 返回DataSet

///

///

///

///

public DataSet GetDataSet(string CmdString,string TableName)

{

Open();

OracleDataAdapter myDa =new OracleDataAdapter();

myDa.SelectCommand = new OracleCommand(CmdString,cnn);

DataSet myDs =new DataSet();

myDa.Fill(myDs,TableName);

Close();

return myDs;

}

///

/// 返回OleDbDataReader

///

///

///

public OracleDataReader GetDataReader(string CmdString)

{

Open();

OracleCommand myCmd =new OracleCommand(CmdString,cnn);

OracleDataReader myDr =myCmd.ExecuteReader();

return myDr;

}

///

/// 返回影响数据库的行数

///

///

///

public int ExecuteSQL(string CmdString)

{

Open();

OracleCommand myCmd =new OracleCommand(CmdString,cnn);

int Cmd =myCmd.ExecuteNonQuery();

Close();

return Cmd;

}

///

/// 邦定DroDownList

///

/// 控件名

/// 连接字符串

/// 表名

/// 提供文本内容的数据源字段

/// 为列表项提供值的数据源字段

public void DroList(DropDownList DroDList,string sql,string TableName,string DataTextFd,string DataValueFd)

{

Open();

OracleDataAdapter myDa =new OracleDataAdapter(sql,cnn);

myDa.SelectCommand.CommandType = CommandType.Text;

DataSet myDs =new DataSet();

try

{

myDa.Fill(myDs,TableName);

DroDList.DataSource = myDs.Tables[TableName];

DroDList.DataTextField = DataTextFd;

DroDList.DataValueField = DataValueFd;

DroDList.DataBind();

}

catch(Exception e)

{

Response.Write(e.Message);

}

finally

{

Close();

}

}

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