.NET(C#)连接各类数据库-集锦 - 数据库编程

pen(); OracleCommand cmd=conn.CreateCommand(); cmd.CommandText="select * from MyTable";//在这儿写sql语句 OracleDataReader odr=cmd.ExecuteReader();//创建一个OracleDateReader对象 while(odr.Read())//读取数据，如果odr.Read()返回为false的话，就说明到记录集的尾部了 { Response.Write(odr.GetOracleString(1).ToString());//输出字段1，这个数是字段索引，具体怎么使用字段名还有待研究 } odr.Close(); } catch(Exception ee) { Response.Write(ee.Message); //如果有错误，输出错误信息 } finally { conn.Close(); //关闭连接 } } -------------------------------------------------------------------------------

4.C#连接MySQL
程序代码:

--------------------------------------------------------------------------------

using MySQLDriverCS;

// 建立数据库连接
MySQLConnection DBConn;
DBConn = new MySQLConnection(new MySQLConnectionString("localhost","mysql","root","",3306).AsString);
DBConn.Open();

// 执行查询语句
MySQLCommand DBComm;
DBComm = new MySQLCommand("select Host,User from user",DBConn);

// 读取数据
MySQLDataReader DBReader = DBComm.ExecuteReaderEx();

// 显示数据
try
{
while (DBReader.Read())
{
Console.WriteLine("Host = {0} and User = {1}", DBReader.GetString(0),DBReader.GetString(1));
}
}
finally
{
DBReader.Close();
DBConn.Close();
}

//关闭数据库连接
DBConn.Close();

--------------------------------------------------------------------------------

5.C#连接IBM DB2
程序代码:

--------------------------------------------------------------------------------

OleDbConnection1.Open();
//打开数据库连接
OleDbDataAdapter1.Fill(dataSet1,"Address");
//将得来的数据填入dataSet
DataGrid1.DataBind();
//绑定数据
OleDbConnection1.Close();
//关闭连接

//增加数据库数据
在Web Form上新增对应字段数量个数的TextBox，及一个button，为该按键增加Click响应事件代码如下：

this.OleDbInsertCommand1.CommandText = "INSERTsintosADDRESS(NAME,
EMAIL, AGE, ADDRESS) VALUES
('"+TextBox1.Text+"','"+TextBox2.Text+"','"+TextBox3.Text+"','"+TextBox4.Text+"')";
OleDbInsertCommand1.Connection.Open();
//打开连接
OleDbInsertCommand1.ExecuteNonQuery();
//执行该SQL语句
OleDbInsertCommand1.Connection.Close();
//关闭连接

--------------------------------------------------------------------------------

6.C#连接SyBase
程序代码: (OleDb)

--------------------------------------------------------------------------------

Provider=Sybase.ASEOLEDBProvider.2;Initial Catalog=数据库名;User ID=用户名;Data Source=数据源;Extended Properties="";Server Name=ip地址;Network Protocol=Winsock;Server Port Address=5000;

.NET(C#)连接各类数据库-集锦(二)