xml-via-dom.aspx

来自「东软内部材料（四）asp等相关的教学案例　」· ASPX 代码 · 共 148 行

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148 行
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<%@Page Language="C#" %>
<%@Import Namespace="System.Xml" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Accessing Xml documents using the DOM</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">Accessing Xml documents using the DOM</span><hr />
<!--------------------------------------------------------------------------->

<div id="outDocURL" runat="server"></div>
<div id="outError" runat="server">&nbsp;</div>
<div id="outResults" runat="server"></div>

<script language="C#" runat="server">

	void Page_Load(Object sender, EventArgs e)
	{
		// create physical path to booklist.xml sample file (in same folder as ASPX page)
		string strCurrentPath = Request.PhysicalPath;
		string strXmlPath = strCurrentPath.Substring(0, strCurrentPath.LastIndexOf("\\")) + "\\booklist.xml";

		// create a new XmlDocument object
		XmlDocument objXmlDoc = new XmlDocument();

		try
		{
			// load the Xml file into the XmlDocument object
			objXmlDoc.Load(strXmlPath);
			outDocURL.InnerHtml = "Loaded file: <b>" + strXmlPath + "</b>";
		}
		catch (Exception objError)
		{
			// display error details
			outError.InnerHtml = "<b>* Error while accessing document</b>.<br />"
						+ objError.Message + "<br />" + objError.Source
						+ "<br />Path=" + strXmlPath;
			return; //  and stop execution
		}

		// now ready to parse the Xml document
		// it must be well-formed to have loaded without error
		// call a recursive function to iterate through all the nodes
		// in the document creating a string that is placed in the <div> above
		outResults.InnerHtml = GetChildNodes(objXmlDoc.ChildNodes, 0);

	}


	string GetChildNodes(XmlNodeList objNodeList, int intLevel)
	{
		string strNodes = "";

		// iterate through all the child nodes for the current node
		foreach (XmlNode objNode in objNodeList)
		{
			// display information about this node
			strNodes = strNodes + GetIndent(intLevel)
							+ GetNodeType(objNode.NodeType) + ": <b>" + objNode.Name;

			// if it is an Xml Declaration node, display the // special' properties
			if (objNode.NodeType == XmlNodeType.XmlDeclaration)
			{
				// cast the XmlNode object to an XmlDeclaration object
				XmlDeclaration objXmlDec = (XmlDeclaration)objNode;
				strNodes = strNodes + "</b>&nbsp; version=<b>" + objXmlDec.Version
							+ "</b>&nbsp; standalone=<b>" + objXmlDec.Standalone + "</b><br />";
			}
			else
			{
				// just display the generic // value' property
				strNodes = strNodes + "</b>&nbsp; value=<b>" + objNode.Value + "</b><br />";
			}

			// if it is an Element node, iterate through the Attributes
			// collection displaying information about each attribute
			if (objNode.NodeType == XmlNodeType.Element)
			{
				// display the attribute information for each attribute
				foreach (XmlAttribute objAttr in objNode.Attributes)
				{
					strNodes = strNodes + GetIndent(intLevel + 1)
								+ GetNodeType(objAttr.NodeType) + ": <b>" + objAttr.Name
								+ "</b>&nbsp; value=<b>" + objAttr.Value + "</b><br />";
				}
			}

			// if this node has child nodes, call the same function recursively
			// to display the information for it and each of its child node
			if (objNode.HasChildNodes)
				strNodes = strNodes + GetChildNodes(objNode.ChildNodes, intLevel + 1);
		
		}// go to next node

		return strNodes;   // pass the result back to the caller

	}


	string GetIndent(int intLevel)
	{
		// returns a string of non-breaking spaces used to indent each line
		string strIndent = "";
		for (int intIndent = 0; intIndent <= intLevel; intIndent++)
			strIndent = strIndent + "&nbsp; &nbsp; &nbsp; ";

		return strIndent;
	}


	string GetNodeType(XmlNodeType intType)
	{
		// returns the node type as a string
		switch (Convert.ToInt32(intType))
		{
		case 0: return "NONE";
		case 1: return "ELEMENT"; break;
		case 2: return "ATTRIBUTE"; break;
		case 3: return "TEXT"; break;
		case 4: return "CDATA SECTION"; break;
		case 5: return "ENTITY REFERENCE"; break;
		case 6: return "ENTITY"; break;
		case 7: return "PROCESSING INSTRUCTION"; break;
		case 8: return "COMMENT"; break;
		case 9: return "DOCUMENT"; break;
		case 10: return "DOCUMENT TYPE"; break;
		case 11: return "DOCUMENT FRAGMENT"; break;
		case 12: return "NOTATION"; break;
		case 13: return "WHITESPACE"; break;
		case 14: return "SIGNIFICANT WHITESPACE"; break;
		case 15: return "END ELEMENT"; break;
		case 16: return "END ENTITY"; break;
		case 17: return "Xml DECLARATION"; break;
		case 18: return "NODE (ALL)"; break;
		default: return "UNKNOWN"; break;
		}
		
	}

</script>

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

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