validating-xml.aspx

来自「东软内部材料（四）asp等相关的教学案例　」· ASPX 代码 · 共 128 行

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Validating XML documents with an XmlValidatingReader object</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">Validating XML documents with an XmlValidatingReader object</span><hr />
<!--------------------------------------------------------------------------->

<form runat="server">
Select XML source document:
<ASP:DropDownList id="selXMLFile" runat="server">
  <ASP:ListItem Text="A valid and well-formed XML document" Value="good-booklist.xml" />
  <ASP:ListItem Text="A well-formed but invalid XML document" Value="bad-booklist.xml" />
  <ASP:ListItem Text="An XML document that is invaild and not well-formed" Value="broken-booklist.xml" />
  <ASP:ListItem Text="An XML document that doesn't even exist" Value="not-there.xml" />
</ASP:DropDownList>
<input type="submit" value="Go" /><p />
</form>

<div id="outXMLDoc" runat="server" /><p />

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

	// declare a variable to hold an XmlTextReader and one to hold the
	// number of errors found. They have to be global because we need
	// to access them within the event handler as well as Page_Load
	XmlTextReader objXTReader ;
	int intValidErrors = 0;

	void Page_Load(Object sender, EventArgs e)
	{
		// create physical path to booklist sample files (in same folder as ASPX page)
		string strCurrentPath = Request.PhysicalPath;
		string strXMLPath = strCurrentPath.Substring(0, strCurrentPath.LastIndexOf("\\")) + "\\" + selXMLFile.SelectedItem.Value;
		string strSchemaPath = strCurrentPath.Substring(0, strCurrentPath.LastIndexOf("\\")) + "\\booklist-schema.xsd";

		// create the new XmlTextReader object and load the XML document
		objXTReader = new XmlTextReader(strXMLPath);
		outXMLDoc.InnerHtml = "Loaded file: <b><a href='" + strXMLPath
					+ "'>" + strXMLPath + "</a></b><br />";

		// create an XMLValidatingReader for this XmlTextReader
		XmlValidatingReader objValidator = new XmlValidatingReader(objXTReader);

		// set the validation type to use an XSD schema
		objValidator.ValidationType = ValidationType.Schema;

		// create a new XmlSchemaCollection
		XmlSchemaCollection objSchemaCol = new XmlSchemaCollection();

		// add the booklist-schema.xsd schema to it
		objSchemaCol.Add("", strSchemaPath);

		// assign the schema collection to the XmlValidatingReader
		objValidator.Schemas.Add(objSchemaCol);

		outXMLDoc.InnerHtml += "Validating against: <b><a href='" + strSchemaPath
						+ "'>" + strSchemaPath + "</a></b><p />";

		// add the event handler for any validation errors found
		objValidator.ValidationEventHandler += new ValidationEventHandler(ValidationError);

		try
		{
			// iterate through the document using the contents as required
			// we simply read each element here without using it for anything
			while (objValidator.Read())
			{
				// use or display the XML content here as required
			}

			// display count of errors found
			outXMLDoc.InnerHtml += "<b>* Validation complete - "
							+ intValidErrors + "</b> error(s) found";
		}
		catch (Exception objError)
		{

			// will occur if there is a read error or the document cannot be parsed
			outXMLDoc.InnerHtml += "<b>* Read/Parser error:</b> " + objError.Message + "<br />";
		}
		finally
		{
			// must remember to always close the XmlTextReader after use
			objXTReader.Close();
		}
		

	}

	// ---------------------------------------------------------------------------

	public void ValidationError(Object objSender, ValidationEventArgs objArgs)
	{
		// event handler called when a validation error is found

		intValidErrors += 1;   // increment count of errors

		// check the severity of the error
		string strSeverity = String.Empty;
		switch (Convert.ToInt32(objArgs.Severity))
		{
		case 0:	strSeverity = "Error"; break;
		case 1:	strSeverity = "Warning"; break;
		}

		// display a message
		outXMLDoc.InnerHtml += "<b>* Validation error:</b> " + objArgs.Message
					+ "<br /> Severity level: '<b>" + strSeverity + "</b>'. ";
					
		if (objXTReader.LineNumber > 0)
			outXMLDoc.InnerHtml += "Line: " + objXTReader.LineNumber
							+ ", character: " + objXTReader.LinePosition + "<br />";

	}

</script>

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

validating-xml.aspx - 源码说明

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