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asp.net qr code reader <!ELEMENT DOCUMENT (CUSTOMER)*> in Visual Studio .NET
<!ELEMENT DOCUMENT (CUSTOMER)*> Recognize QR Code JIS X 0510 In .NET Framework Using Barcode scanner for VS .NET Control to read, scan QR Code ISO/IEC18004 image in .NET applications. www.OnBarcode.comQR-Code Scanner In .NET Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications. www.OnBarcode.com<!ELEMENT CUSTOMER (NAME,DATE,ORDERS)>
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<DOCUMENT>
<CUSTOMER>
<NAME>
<LASTNAME>Edwards</LASTNAME>
<FIRSTNAME>Britta</FIRSTNAME>
</NAMES>
<DATE>April 17, 1998</DATE>
<ORDERS>
<ITEM>
<PRODUCT>Cucumber</PRODUCT>
Here's what you see when you run showtext now (Note that the parser pinpoints the error, indicating that an error was found at line 20, character 12, in showtextxml and that the error was Close tag mismatch: NAMES instead of NAME) C:\xml\showtext>c:\jdk1-0\java\bin\java showtext Error: file://c://xml//showtext//showtextxml(20,12) Context: - <null> - <DOCUMENT> - <CUSTOMER> - <NAME>
commsxmlParseException: Close tag mismatch: NAMES instead of NAME
commsxmlParsererror(Parserjava:110) commsxmlParserparseElement(Parserjava:1100) at commsxmlParserparseDocument(Parserjava:643) at commsxmlParserparse(Parserjava:47) at commsxmlDocumentload(Documentjava:171) at showtextmain(showtextjava:27) That's it, then, for this example: now we've seen how to load in an XML document and display its text The code for this program, showtextjava, appears in Listing 21, and the XML document it reads in, showtextxml, appears in Listing 22 Listing 21 showtextjava import commsxmlParseException; import commsxmlDocument; import javanet*; class showtext
static String filename; public static void main(String args[]) filename = "file:////c://xml//showtext//showtextxml"; URL url = null; try { url = new URL(filename); catch (MalformedURLException ex) { Systemoutprintln("Cannot create URL for file: " + filename); Systemexit(0); Document d = new Document(); try { dload(url); catch (ParseException e) { dreportError(e, Systemout); if (d != null) { Systemoutprintln(dgetText()); Listing 22 showtextxml < XML version = "10" >
<!DOCTYPE DOCUMENT [ <!ELEMENT DOCUMENT (CUSTOMER)*>
<!ELEMENT CUSTOMER (NAME,DATE,ORDERS)>
<!ELEMENT NAME (LASTNAME,FIRSTNAME)>
<!ELEMENT LASTNAME (#PCDATA)>
<!ELEMENT FIRSTNAME (#PCDATA)>
<!ELEMENT DATE (#PCDATA)>
<!ELEMENT ORDERS (ITEM)*>
<!ELEMENT ITEM (PRODUCT,NUMBER,PRICE)>
<!ELEMENT PRODUCT (#PCDATA)>
<!ELEMENT NUMBER (#PCDATA)>
<!ELEMENT PRICE (#PCDATA)>
<DOCUMENT>
<CUSTOMER>
<NAME>
<LASTNAME>Edwards</LASTNAME>
<FIRSTNAME>Britta</FIRSTNAME>
</NAME>
<DATE>April 17, 1998</DATE>
<ORDERS>
<ITEM>
<PRODUCT>Cucumber</PRODUCT>
<NUMBER>5</NUMBER>
<PRICE>$125</PRICE>
</ITEM>
<ITEM>
<PRODUCT>Lettuce</PRODUCT>
<NUMBER>2</NUMBER>
<PRICE>$98</PRICE>
</ITEM>
</ORDERS>
</CUSTOMER>
<CUSTOMER>
<NAME>
<LASTNAME>Thompson</LASTNAME>
<FIRSTNAME>Phoebe</FIRSTNAME>
</NAME>
<DATE>May 27, 1998</DATE>
<ORDERS>
<ITEM>
<PRODUCT>Banana</PRODUCT>
<NUMBER>12</NUMBER>
<PRICE>$295</PRICE>
</ITEM>
<ITEM>
<PRODUCT>Apple</PRODUCT>
<NUMBER>6</NUMBER>
<PRICE>$150</PRICE>
</ITEM>
</ORDERS>
</CUSTOMER>
</DOCUMENT>
Now we've gotten started with parsing XML documents These days, however, its rare to have
console-oriented programs, so let's take a look at the same document-reading process as above but this time with the idea of displaying the XML document's text in a window The showtextwin Example
In this next example, we'll display a window with a text field and a button marked Click Me: When the user clicks the Click Me button, we can read in the XML document showtextwinxml This document is the same as the document in Listing 22, showtextxml and displays the text of that document in the text field: We start this new example, showtextwinjava, with a main() method that creates and displays a new window of class showtextwin (we'll write the code for this class next): import javaappletApplet; public class showtextwin extends Applet{ public static void main(String args[]) showtextwinFrame frame = new showtextwinFrame("The showtextwin application"); frameresize(450, 300); showtextwin applet = new showtextwin(); frameadd("Center", applet); appletinit(); appletstart(); frameshow(); We also add the window class showtextwinFrame to the end of the showtextwinjava file: class showtextwinFrame extends Frame public showtextwinFrame(String str) super (str); public boolean handleEvent(Event evt) switch (evtid) case EventWINDOW_DESTROY: dispose(); Systemexit(0); return true; default: return superhandleEvent(evt); Now our window is created and we're ready to add the controls we need We do that in the init() method: import javaawt*; import javaappletApplet; public class showtextwin extends Applet{ Label label1; TextField text1; Button button1; public static void main(String args[]) showtextwinFrame frame = new showtextwinFrame("The showtextwin application"); frameresize(450, 300); showtextwin applet = new showtextwin(); frameadd("Center", applet); appletinit(); appletstart(); frameshow(); public void init(){ label1 = new Label("The XML file:"); add(label1); text1 = new TextField(35); add(text1); button1 = new Button("Click Me"); add(button1); The controls we need are installed at this point We can create a new URL object for the XML document we want read in when the user clicks the Click Me button: import javaawt*; import javanet*; import javaappletApplet; public class showtextwin extends Applet{ Label label1; TextField text1; Button button1; static String filename; public static void main(String args[]) public void init() public boolean action (Event e, Object o){ if(etargetequals(button1)){ URL url = null; try { url = new URL("file:////c://xml//showtextwin// showtextwinxml"); } catch (MalformedURLException e1) { Systemoutprintln("Cannot create URL for: " + filename); Systemexit(0); return true; Next, we will create a new Document object and load the XML document into that document: import commsxmlParseException; import commsxmlDocument; import javaawt*; import javanet*; import javaappletApplet; public class showtextwin extends Applet{ Label label1; TextField text1; Button button1; static String filename; public static void main(String args[]) public void init() public boolean action (Event e, Object o){ if(etargetequals(button1)){ URL url = null; try { url = new URL("file:////c://xml//showtextwin// showtextwinxml"); } catch (MalformedURLException e1) { Systemoutprintln("Cannot create URL for: " + filename); Systemexit(0); Document d = new Document(); try { dload(url); catch (ParseException e2) { dreportError(e2, Systemout); return true; Finally, we display the document's text in the text field: import commsxmlParseException; import commsxmlDocument; import javaawt*; import javanet*; import javaappletApplet; public class showtextwin extends Applet{ Label label1; TextField text1; Button button1; static String filename; public static void main(String args[]) public void init() public boolean action (Event e, Object o){ if(etargetequals(button1)){ URL url = null; try { url = new URL("file:////c://xml//showtextwin// showtextwinxml"); } catch (MalformedURLException e1) { Systemoutprintln("Cannot create URL for: " + filename); Systemexit(0); Document d = new Document(); try { dload(url); catch (ParseException e2) { dreportError(e2, Systemout); if(d != null){ text1setText(dgetText()); return true;
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