我再次檢查DataReader對象是否有數據有問題嗎?如何檢查DataReader是否有數據?
Dim cmd as SqlCommand
Dim drd as SqlDataReader
cmd = New SqlCommand ("SELECT * FROM Stock", conx)
drd = cmd.ExecuteReader()
''HERE I WOULD LIKE TO CHECK WHETHER drd has Data or not
While (drd.Read())
{
txtName.Text = drd.Item("StockName")
}
我該如何檢查?請幫幫我!感謝所有在advcance!
非常感謝!有用! – RedsDevils 2009-11-28 12:04:41