(MFC) XML SearchForAttribute Method

Demonstrates the SearchForAttribute method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSearch.xml, is this:

<root>
    <searchRoot>
        <fruit color="red">apple</fruit>
        <fruit color="green">pear</fruit>
        <veg color="orange">carrot</veg>
        <meat animal="cow">beef</meat>
        <xyz>
            <fruit color="blue">blueberry</fruit>
            <veg color="green">broccoli</veg>
        </xyz>
        <fruit color="purple">grape</fruit>
        <cheese color="yellow">cheddar</cheese>
    </searchRoot>
    <fruit color="red">strawberry</fruit>
    <fruit color="orange">peach</fruit>
    <root></root>
</root>

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

FreeBSD C++ Libraries

HP-UX C++ Libraries

BlackBerry QNX C++ Libraries

// Needs #include <CkXml.h>

    CkString strOut;

    CkXml xml;
    CkXml *xSearchRoot = 0;
    CkXml *xBeginAfter = 0;
    CkXml *xFound = 0;

    bool success;
    //  The sample input XML is available at http://www.chilkatsoft.com/data/fruitSearch.xml
    success = xml.LoadXmlFile("fruitSearch.xml");
    if (success != true) {
        strOut.append(xml.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Search the sub-tree rooted at "searchRoot"
    xSearchRoot = xml.FindChild("searchRoot");

    //  Search for all "fruit" nodes having a color attribute
    //  where the name of the color ends in "e"
    xBeginAfter = 0;
    xFound = xSearchRoot->SearchForAttribute(*xBeginAfter,"fruit","color","*e");
    while (!(xFound == 0 )) {

        strOut.append(xFound->content());
        strOut.append(": ");
        strOut.append(xFound->GetAttrValue("color"));
        strOut.append("\r\n");

        delete xBeginAfter;
        xBeginAfter = xFound;
        xFound = xSearchRoot->SearchForAttribute(*xBeginAfter,"fruit","color","*e");
    }

    //  The correct output is:
    //  grape: purple
    //  blueberry: blue

    delete xBeginAfter;

    strOut.append("--------------------------");
    strOut.append("\r\n");

    //  ---------------------------------------------------------------------------------
    //  Now do the same, but instead use SearchForAttribute2
    //  which updates the internal reference of the caller instead
    //  of returning the found node.
    CkXml *xSearch = 0;

    xBeginAfter = xSearchRoot->GetSelf();
    xSearch = xSearchRoot->GetSelf();

    success = xSearch->SearchForAttribute2(*xBeginAfter,"fruit","color","*e");
    while (success == true) {

        strOut.append(xSearch->content());
        strOut.append(": ");
        strOut.append(xSearch->GetAttrValue("color"));
        strOut.append("\r\n");

        //  Copy the internal references so that the next search
        //  begins after the found node.
        xBeginAfter->CopyRef(*xSearch);
        xSearch->CopyRef(*xSearchRoot);

        success = xSearch->SearchForAttribute2(*xBeginAfter,"fruit","color","*e");
    }

    delete xSearch;
    delete xBeginAfter;

    delete xSearchRoot;

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());