SqlDataReader 範本

Dim dr as SqlDataReader
Dim Conn as SqlConnection
Dim cmd as SqlCommand

Conn= new SqlConnection("資料庫的連線字串，請自己修改")
cmd = new SqlCommand("SELECT * from 資料表", mySqlConnection)

try
Conn.Open()
dr = cmd.ExecuteReader()

do while (dr.Read())
'--把資料展現到畫面上。請自由發揮
loop

catch e as Exception
Response.Write(e.ToString())

finally
if Not (dr is Nothing) ' --關閉 DataReader
dr.Close()
end if

if (Conn.State = ConnectionState.Open) ' --關閉 DB的連線
Conn.Close()
end if
end try


//-----------------方法二-----------

Dim queryString As String = "SELECT * From 資料表;"

Using Conn As New SqlConnection("資料庫的連線字串")
Dim my_command As New SqlCommand(queryString, Conn)
Conn.Open()
'-- 資料庫連線！但後面「不」需要寫關閉的動作（Conn.Close()），因為Using....End Using 會自己處理

Dim reader As SqlDataReader = my_command.ExecuteReader()

While reader.Read()
'-- 自己寫程式，展現欄位的值。
End While

'-- 關閉DataReader
reader.Close()
End Using