以users表為例，有三個字段，自增長的編號id，int類型；名稱name，nvarchar類型，密碼pwd，nvarchar類型
首先在vs2005中引入System.Data.OracleClient;命名空間
publicint Insert(stringname, string pwd)
{
OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");
conn.Open();
stringsql = "insert into users(name,pwd)values(:name,:pwd)";
OracleCommandcmd = new OracleCommand(sql,conn);
OracleParameter parn = new OracleParameter(":name", name);
cmd.Parameters.Add(parn);
OracleParameter parp = new OracleParameter(":pwd", name);
cmd.Parameters.Add(parp);
int result = cmd.ExecuteNonQuery(); //result接收受影響行數(shù)，也就是說result大于0的話表示添加成功
conn.Close();
cmd.Dispose();
return result;
}
publicint Update(int id)
{
OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");
conn.Open();
stringsql = "delete from users where id=:id";
OracleCommandcmd = new OracleCommand(sql,conn);
OracleParameterpari = new OracleParameter(":id", id);
cmd.Parameters.Add(pari);
int result = cmd.ExecuteNonQuery(); //result接收受影響行數(shù)，也就是說result大于0的話表示添加成功
conn.Close();
cmd.Dispose();
return result;
}
publicint Insert(stringname, string pwd, intid)
{
OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");
conn.Open();
stringsql = "update users set name=:name,pwd=:pwdwhere id=:id";
OracleCommandcmd = new OracleCommand(sql,conn);
OracleParameterparn = new OracleParameter(":name", name);
cmd.Parameters.Add(parn);
OracleParameterparp = new OracleParameter(":pwd", name);
cmd.Parameters.Add(parp);
OracleParameterpari = new OracleParameter(":id", id);
cmd.Parameters.Add(pari);
intresult = cmd.ExecuteNonQuery();
conn.Close();
cmd.Dispose();
returnresult;
}
publicDataTable Select()
{
OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");
conn.Open();
stringsql = "select * from users";
OracleCommandcmd = new OracleCommand(sql,conn);
OracleDataAdapteroda = new OracleDataAdapter(cmd);
DataTable dt = new DataTable();
oda.Fill(dt);
conn.Close();
cmd.Dispose();
return dt;
}
方法寫好后，下面舉一個查詢的例子，在form窗體中拖一個DataGridView,然后在Load方法中
private void Form1_Load(object sender, EventArgs e)
{dataGridView1.DataSource = Select();
}
這樣一運行，DataGridView中就會顯示數(shù)據(jù)了
