C-C++ Code (errorXPath.cpp)

 

C++

#include <stdio.h>
#import <msxml6.dll>
using namespace MSXML2;

int main(int argc, char* argv[])
{
  HRESULT hr;

  CoInitialize(NULL);

  IXMLDOMDocument3Ptr pXMLDoc;
  hr = pXMLDoc.CreateInstance(__uuidof(DOMDocument60));
  if (FAILED(hr)) 
  {
    printf("Failed to CreateInstance on an XML DOM");
    return -1;
  }
  pXMLDoc->async = VARIANT_FALSE; 
  pXMLDoc->validateOnParse = VARIANT_FALSE;  
  hr = pXMLDoc->setProperty("MultipleErrorMessages", VARIANT_TRUE);
  if (FAILED(hr))
  {
    printf("Failed to enable mulitple validation errors\n");
    return -1;
  }
  if(pXMLDoc->load("books.xml")!=VARIANT_TRUE)
  {
    printf("Failed to load DOM from books.xml. %s\n",
      (LPCSTR)pXMLDoc->parseError->reason);
    return -1;
  }

  IXMLDOMDocument3Ptr pXSDDoc;
  hr = pXSDDoc.CreateInstance(__uuidof(DOMDocument60));
  if (FAILED(hr)) 
  {
    printf("Failed to CreateInstance on an XSD Doc");
    return -1;
  }
  pXSDDoc->async = VARIANT_FALSE; 
  pXSDDoc->validateOnParse = VARIANT_FALSE;  
  if(pXSDDoc->load("books.xsd")!=VARIANT_TRUE)
  {
    printf("Failed to load XSD from books.xsd. %s\n",
      (LPCSTR)pXSDDoc->parseError->reason);
    return -1;
  }

  
    IXMLDOMSchemaCollectionPtr pSCache;
  hr = pSCache.CreateInstance(__uuidof(XMLSchemaCache60));
    if (FAILED(hr)) {
    printf("Cannot instantiate XMLSchemaCache60\n");
    return -1;
  }
    pXMLDoc->schemas = pSCache.GetInterfacePtr();
    
  hr = pSCache->add("urn:books", pXSDDoc.GetInterfacePtr());
    if (FAILED(hr)) {
    printf("Cannot add 'urn:books' to schema cache.\n");
    return -1;
  }

  // Validate the entire DOM.
  printf("Validating DOM...\n");
    IXMLDOMParseError2Ptr pError =pXMLDoc->validate();
    if (pError->errorCode != 0) {
    printf("invalid dom:\n%s",(LPCSTR)pError->reason);
    printf("errorXPath:\n%s\n",(LPCSTR)pError->errorXPath);
   }
    else
        printf("DOM is valid:\n%s\n",(LPCSTR)pXMLDoc->xml);

  // Validate DOM fragments.
  printf("\n\nvalidating nodes...\n");
  IXMLDOMNodeListPtr pNList;
  pNList = pXMLDoc->selectNodes("//book");
  IXMLDOMNodePtr pNode;
  for (int i=0; i<pNList->length; i++)
  {
    pNode = pNList->item[i];
    pError = pXMLDoc->validateNode(pNode);
    if (pError->errorCode !=0)
    {
      printf("\nNode is invalid:\n%s",
        (LPCSTR)pError->reason);
      printf("errorXPath:\n%s\n", 
        (LPCSTR)pError->errorXPath);
    }
    else 
    {
      printf("\nNode is valid:\n%s\n",
        (LPCSTR)pNode->xml);
    }

  }
  pError.Release();
  pXMLDoc.Release();
  pXSDDoc.Release();
  pSCache.Release();
  pNList.Release();
  pNode.Release();
    CoUninitialize();

  return 0;
}

Try It!

1. Start Visual C++.

2. From the File menu, select New. On the Projects tab of the New dialog box that appears, select Win32 Console Application in the left pane. Then type "errorXPathProj" in the Project name field. For the project Location field, either accept the default setting or choose another location. Click OK.

3. TheWin32 Console Application property page will appear. For the type of Console Application, select An empty project and click Finish. When the New Project Information box displays, click OK.

4. Select FileView on the project browser, and highlight ErrorXPathProj files. From the File menu, select New.

5. On the Files tab of the New dialog box, highlight C++ Source File. Then type "books.xml" in the File name text box. Be sure to put quotes around the name of the text file. Otherwise, Visual C++ will generate an unwanted .txt suffix to the XML file.

6. Click OK.

7. Copy the XML data file (books.xml), and paste it into the text file you just created.

8. Repeat steps 4-7 for the XSD listing (Resource Files (books.xml and books.xsd)).

   Note

   You can also copy these files into the project's main directory using Windows Explorer (or a command prompt).

9. Repeat steps 4-7 for the C++ source code above (errorXPath.cpp).

10. Build the sample by selecting Build errorXPathProj.exe from the Build menu.

11. Execute the sample application by selecting !Execute errorXPathProj.exefrom the Build menu.

12. Verify that your output is the same as that listed in Output for the errorXPath Example.