xmldatareader-sql.aspx

来自「Professional ASP.NET source code」· ASPX 代码 · 共 91 行

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91 行
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<%@Page Language="C#" debug="true"%>

<%@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="C#" runat="server">

	void Page_Load(Object sender, EventArgs e)
	{

		// get connection string from ..\global\connect-strings.ascx user control
		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
		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
		StringBuilder objStrBuilder = new StringBuilder();

		//try
		{

			// create a new Connection object using the connection string
			SqlConnection objConnect = new SqlConnection(strConnect);

			// create a new Command using the connection object and select statement
			SqlCommand objCommand = new SqlCommand(strSelect, objConnect);

			// declare a variable to hold an XmlTextReader object
			XmlTextReader objXTReader;

			// open the connection to the database
			objConnect.Open();

			// execute the SQL statement against the command to fill the XmlReader
			objXTReader = (XmlTextReader)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 (Exception objError)
		{
			// display error details
			outError.InnerHtml = "<b>* Error while accessing data</b>.<br />"
						+ objError.Message + "<br />" + objError.Source;
			return;  //  and stop execution
		}
		*/
		// display the results as Text to show XML elements
		outError.InnerText = objStrBuilder.ToString();

	}
</script>


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

xmldatareader-sql.aspx - 源码说明

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