(MFC) JSON Iterate Members

Demonstrates how to loop over the immediate members of a JSON object.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkJsonObject json;

    const char *jsonStr = "{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", \"green\"], \"price\": 125 }";

    bool success = json.Load(jsonStr);
    if (success != true) {
        strOut.append(json.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    int numMembers = json.get_Size();
    int i;
    for (i = 0; i <= numMembers - 1; i++) {

        const char *name = json.nameAt(i);
        const char *value = json.stringAt(i);

        strOut.append(name);
        strOut.append(": ");
        strOut.append(value);
        strOut.append("\r\n");

        int iValue = json.IntAt(i);
        strOut.append(name);
        strOut.append(" as integer: ");
        strOut.appendInt(iValue);
        strOut.append("\r\n");

    }

    // Note: The StringAt method returns the value as a string regardless of the type.
    // If the value is a JSON array (such as for ["home", "green"]), then the JSON encoding
    // of the entire array is returned.

    // The IntAt method returns the value as an integer.  If the value does not convert to 
    // an integer, then 0 is returned


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }