📄 simple-dataset-jet.aspx
字号:
<%@Page Language="VB"%>
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.OleDb" %>
<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>The .NET DataSet and OleDbDataAdapter Objects</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">The .NET DataSet and OleDbDataAdapter Objects</span><hr />
<!--------------------------------------------------------------------------->
<%'-- insert connection string script --%>
<wrox:connect id="ctlConnectStrings" runat="server"/>
<div>Connection string: <b><span id="outConnect" runat="server"></span></b></div>
<div>SELECT command: <b><span id="outSelect" runat="server"></span></b></div>
<div id="outError" runat="server"> </div>
<asp:datagrid id="dgrResult" runat="server" />
<script language="vb" runat="server">
Sub Page_Load()
'get connection string from ..\global\connect-strings.ascx user control
Dim strConnect As String
strConnect = ctlConnectStrings.JetConnectionString
outConnect.innerText = strConnect 'and display it
'specify the SELECT statement to extract the data
Dim strSelect As String
strSelect = "SELECT * FROM BookList WHERE ISBN LIKE '1861003%'"
outSelect.innerText = strSelect 'and display it
'declare a variable to hold a DataSet object
'note that we have to create it outside the Try..Catch block
'as this is a separate block and so is a different scope
Dim objDataSet As New DataSet()
Try
'create a new Connection object using the connection string
Dim objConnect As New OleDbConnection(strConnect)
'create a new DataAdapter using the connection object and select statement
Dim objDataAdapter As New OleDbDataAdapter(strSelect, objConnect)
'fill the dataset with data from the DataAdapter object
objDataAdapter.Fill(objDataSet, "Books")
Catch objError As Exception
'display error details
outError.innerHTML = "<b>* Error while accessing data</b>.<br />" _
& objError.Message & "<br />" & objError.Source
Exit Sub ' and stop execution
End Try
'create a DataView object for the Books table in the DataSet
Dim objDataView As New DataView(objDataSet.Tables("Books"))
'assign the DataView object to the DataGrid control
dgrResult.DataSource = objDataView
dgrResult.DataBind() 'and bind (display) the data
End Sub
</script>
<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -