c#中listview显示数据（连接oracle数据库）

我晕,这条添加真简洁啊

private void displayButton_Click(object sender, System.EventArgs e)
{
//清空listview中的数据
listView1.Items.Clear();
//建立数据连接
OracleConnection conn = new OracleConnection("Data Source = qinwu; Uid = Qinwu; Pwd = Qinwu");
conn.Open();

//打开数据集
string strCom = "select * from SYSTEMUSER";
OracleCommand ocd = new OracleCommand(strCom,conn);
OracleDataReader r = ocd.ExecuteReader();
//对数据集中的数据记录进行遍历，在遍历中添加记录到列表中
while ( r.Read ( ) )
{
ListViewItem li = new ListViewItem( new string[] {r["USERID"].ToString ( ), r["USERNAME"].ToString ( ),r["PASSWORD"].ToString ( ),r["POLICESTATIONID"].ToString ( ), r["ROLEID"].ToString ( ) , r["IP"].ToString ( ), r["DESCRIPTION"].ToString ( ), r["ISDELETE"].ToString ( ), r["CHINESENAME"].ToString ( ) } );

listView1.Items.Add ( li ) ;
}
//关闭数据集、关闭数据连接
r.Close();
conn.Close();

}