get-data-as-xml.aspx

来自「Code for VB.NET教程源码 很好的源码」· ASPX 代码 · 共 93 行

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93 行
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<%@Page Language="VB"%>

<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.OleDb" %>

<%@Import Namespace="System.Data.Common" %>

<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Returning XML from a DataSet</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">Returning XML from a DataSet</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">&nbsp;</div>

<form id="frmThis" runat="server">
<input type="checkbox" id="chkXML" onclick="frmThis.submit()" runat="server" /> Display XML Data &nbsp;
<input type="checkbox" id="chkSchema" onclick="frmThis.submit()" runat="server" /> Display XML Schema &nbsp;
</form>

<%'-- create XMP element to display the XML document --%>
<xmp id="xmpResults" runat="server" /></xmp>

<script language="VB" runat="server">

Sub Page_Load()
   ShowData()
End Sub

Sub ShowData

   'get connection string from ..\global\connect-strings.ascx user control
   Dim strConnect = ctlConnectStrings.OLEDBConnectionString
   outConnect.innerText = strConnect 'and display it

   'specify the SELECT statement to extract the data
   Dim strSelect As String
   strSelect = "SELECT BookList.*, BookAuthors.FirstName, BookAuthors.LastName " _
             & "FROM BookList INNER JOIN BookAuthors ON BookList.ISBN = BookAuthors.ISBN " _
             & "WHERE BookList.ISBN LIKE '18610033%'"
   outSelect.innerText = strSelect   'and display it

   'create a new DataSet object
   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 accesing data</b>.<br />" _
          & objError.Message & "<br />" & objError.Source
      Exit Sub  ' and stop execution

   End Try

   'display the data and/or schema in the DataSet as an XML document
   xmpResults.InnerHtml = ""
   If chkSchema.checked Then
      xmpResults.InnerHtml = objDataSet.GetXmlSchema() & vbCrlf & vbCrlf
   End If
   If chkXML.checked Then
      xmpResults.InnerHtml += objDataSet.GetXml()
   End If

End Sub
</script>


<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>

get-data-as-xml.aspx - 源码说明

本页面展示了「Code for VB.NET教程源码 很好的源码」中的 get-data-as-xml.aspx 源码文件，采用 ASPX 编程语言编写，共 93 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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