📄 ch14-05-02.aspx
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<%@ Page Language="VB" Debug="true" %>
<%@ Import NameSpace="System.Data" %>
<%@ Import NameSpace="System.Data.OleDb" %>
<% Response.Expires = 0 %>
<Html>
<Head>
<Script Language="VB" Runat="Server">
Sub Page_Load(Obj As Object, e As EventArgs)
Dim TableName As String
TableName = "UserDatas"
Dim DSN As String, tSQL As String
Dim OBJConn As New OleDBConnection()
Dim OBJCmd As New OleDBCommand()
Dim strA As String
Dim FieldCounts As Integer, I As Integer
DSN = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & _
Server.MapPath("ASP.NET网页数据库.mdb") & ";"
' 设置SQL语言的内容
tSQL = "Select * From " & TableName
OBJConn = New OleDbConnection(DSN) ' 设置使用联机字符串
OBJConn.Open()
' 通过OleDbCommand对象并通过Connection对象，
' 执行SQL语言
OBJCmd = New OleDbCommand(tSQL, OBJConn)
' 声明OleDbDataReader对象
Dim OBJReader As OleDbDataReader
' 设置OleDbDataReader对象的数据源
OBJReader = OBJCmd.ExecuteReader()
' 输出结果
Response.Write("<H2>表名称：" & TableName & "</H2>")
' 获取数据录的字段总数
FieldCounts = OBJReader.FieldCount()
' 使用For...Next循环输出所有的字段名称
For I = 0 To FieldCounts -1
Response.Write("字段名称 " & (I+1) & "：" & OBJReader.GetName(I))
Response.Write(" 数据类型：" & OBJReader.GetDataTypeName(I))
Response.Write("<BR>")
Next
OBJReader.Close()
OBJConn.Close()
End Sub
</Script>
</Head>
<Body>
</Body>
</Html>
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