get-data-as-xml.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#"%>

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

	void Page_Load(Object sender, EventArgs e)
	{
		ShowData();
	}

	void ShowData()
	{
		// get connection string from ..\global\connect-strings.ascx user control
		string strConnect = ctlConnectStrings.OLEDBConnectionString;
		outConnect.InnerText = strConnect; // and display it

		// specify the SELECT statement to extract the data
		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
		DataSet objDataSet = new DataSet();

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

			// create a new DataAdapter using the connection object and select statement
			OleDbDataAdapter objDataAdapter = new OleDbDataAdapter(strSelect, objConnect);

			// fill the dataset with data from the DataAdapter object
			objDataAdapter.Fill(objDataSet, "Books");
		}
		catch (Exception objError)
		{
			// display error details
			outError.InnerHtml = "<b>* Error while accesing data</b>.<br />"
					+ objError.Message + "<br />" + objError.Source;
			return;
		}
		

		// display the data and/or schema in the DataSet as an XML document
		xmpResults.InnerHtml = "";
		if (chkSchema.Checked)
			xmpResults.InnerHtml = objDataSet.GetXmlSchema() + "\n"+ "\r";

		if (chkXML.Checked)
			xmpResults.InnerHtml += objDataSet.GetXml();
	}
</script>


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

get-data-as-xml.aspx - 源码说明

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