📄 xmldatareader-sql.aspx
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<%@Page Language="VB"%>
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.SqlClient" %>
<%@Import Namespace="System.Xml" %>
<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Reading XML Direct From SQL Server With An XmlReader</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">Reading XML Direct From SQL Server With An XmlReader</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><p />
<div id="outError" runat="server" />
<div id="outResult" 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.SQLConnectionString
outConnect.InnerText = strConnect 'and display it
'specify the SELECT statement to extract the data as an
'XML document using SQL Server 2000's "FOR XML" option
Dim strSelect As String
strSelect = "SELECT * FROM BookList WHERE ISBN LIKE '1861003%' FOR XML AUTO"
outSelect.InnerText = strSelect 'and display it
'create a new StringBuilder to hold the results
Dim objStrBuilder As New StringBuilder()
Try
'create a new Connection object using the connection string
Dim objConnect As New SqlConnection(strConnect)
'create a new Command using the connection object and select statement
Dim objCommand As New SqlCommand(strSelect, objConnect)
'declare a variable to hold an XmlTextReader object
Dim objXTReader As XmlTextReader
'open the connection to the database
objConnect.Open()
'execute the SQL statement against the command to fill the XmlReader
objXTReader = objCommand.ExecuteXmlReader()
'read the first result to initialize the reader
objXTReader.Read()
'and then read remainder into the StringBuilder as well
objStrBuilder.Append(objXTReader.GetRemainder().ReadToEnd())
'close the XmlReader and Connection
objXTReader.Close()
objConnect.Close()
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
'display the results as Text to show XML elements
outError.InnerText = objStrBuilder.ToString()
End Sub
</script>
<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>
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