求C#.NET 对ACCSEE数据库操作（添加/删除/连接数据库)代码

连接数据库
public OleDbConnection GreatConn()
{
string strConnection="provider=Microsoft.jet.OLEDB.4.0;data Source="+Server.MapPath("mdb/wxy.Mdb")+";";

OleDbConnection objConnection=new OleDbConnection (strConnection);
return objConnection;
}
添加
private void add()
{
string tjwords=this.tjwords.Text;
string tjcomm="insert into 表名(name) values ('"+tjwords+"')";
OleDbConnection conn=GreatConn();
conn.Open();
OleDbCommand comm=new OleDbCommand(tjcomm,conn);
comm.ExecuteNonQuery();
comm.Dispose();
conn.Close();

}

删除
private void del()
{
string tjwords=this.tjwords.Text;
string tjcomm="delete from 表名 where name=('"+tjwords+"')";
OleDbConnection conn=GreatConn();
conn.Open();
OleDbCommand comm=new OleDbCommand(tjcomm,conn);
comm.ExecuteNonQuery();