asked on

IHTMLDOMNode appendChild return E_INVALIDARG

Hi,

I need some help please.
I tried to figure it out, but with no success so far.
Why do I get E_INVALIDARG when I try to use the appendChild Function.
This is my source code:

IHTMLElement* pHTMLElement;
IHTMLElement* pNewHTMLElement;
IHTMLDOMNode* pHTMLDOMNode;
IHTMLDOMNode* pNewHTMLDOMNode;
IHTMLDOMNode* pNew2HTMLDOMNode;
IDispatch* pDisp;

v.vt = VT_BSTR;
v.bstrVal = SysAllocString(L"HEAD");

hResult = pIHTMLElementCollection->tags(v,&pDisp );

if (hResult == S_OK)

{
hResult = pDisp->QueryInterface(IID_IHTMLElementCollection,(void**)&pIHTMLElementCollection);
if (hResult == S_OK)
{
pIHTMLElementCollection->get_length(&lCollectionSize);

v.vt = VT_I4;
v.lVal = 0;

hResult = pIHTMLElementCollection->item(v,v,&pDisp);

if (hResult == S_OK && pDisp != NULL)
{
hResult = pDisp->QueryInterface(IID_IHTMLElement,(void**)&pHTMLElement);
if (hResult == S_OK)
{
hResult=pHTMLElement->QueryInterface(IID_IHTMLDOMNode,(void**)&pHTMLDOMNode);

if (hResult == S_OK)
{
bstrTemp = SysAllocString(L"BASE");
hResult=pIHTMLDocument2->createElement(bstrTemp, &pNewHTMLElement);
SysFreeString(bstrTemp);

if (hResult == S_OK)
{
bstrTemp = SysAllocString(L"href");
v.vt = VT_BSTR;
v.bstrVal = strWebPageDomain.GetBuffer();

hResult=pNewHTMLElement->setAttribute(bstrTemp, v, 0);

SysFreeString(bstrTemp);

if (hResult == S_OK)
{
hResult=pNewHTMLElement->QueryInterface(IID_IHTMLDOMNode,(void**)&pNewHTMLDOMNode);
if (hResult == S_OK)
{
***********************************
************************************
hResult =pHTMLDOMNode->appendChild(pNewHTMLDOMNode, &pNew2HTMLDOMNode);

************************************
***********************************
}
}

}
}
}
}
}
}
}
}

DanRollins

I did not check your code.
If you can use that code to insert a different type of node (say, a <P>) then the problem is probably related to the the fact that the <BASE> tag gets special treatment. It must be included in the <HEAD> container before any other URLs are accessed.

You could try getElementByTagName to get the HEAD tag (it is a member of the all collection) and then add the node as a child. Or get its innerHTML and insert the <base>...</base> text.

But I'm not at all certain that that would work... Something would need to be done to make the browser completely refresh the screen since virtually everything on it could change.

=-=-=-=-=-=-=-=-=-=
If you are having trouble inserting other tags, then let me know and I'll check your code.

-- Dan

shy_amar

ASKER

I did try to insert a different tag but I still get the same error code.
Although I don't use the getElementByTagName , I use the pIHTMLElementCollection->tags(v,&pDisp ) -
the same principle (this is only partial code, but relevant to the problem).

to make is easy for you, I attached the entire function
I would appreciate your help.

HRESULT                  hResult;
VARIANT                  v;
BSTR                  bstrWebPageDomain;
CString                  strWebPageDomain("");
IHTMLElementCollection*      pIHTMLElementCollection;
IHTMLElement*            pHTMLElement;
IHTMLElement*            pNewHTMLElement;
IHTMLDOMNode*            pHTMLDOMNode;
IHTMLDOMNode*            pNewHTMLDOMNode;
IHTMLDOMNode*            pNew2HTMLDOMNode;
IDispatch*                  pDisp;
long                  lCollectionSize;
BOOL                  bIsOK;
BSTR                  bstrTemp;

hResult             = S_OK;;
pIHTMLElementCollection = NULL;
pHTMLElement        = NULL;
pNewHTMLElement        = NULL;
pHTMLDOMNode        = NULL;
pNewHTMLDOMNode        = NULL;
pNew2HTMLDOMNode        = NULL;
pDisp             = NULL;
lCollectionSize        = 0;
bIsOK             = FALSE;


hResult = pIHTMLDocument2->get_domain(&bstrWebPageDomain);
      if (hResult == S_OK)
      {
            strWebPageDomain = bstrWebPageDomain;
            SysFreeString(bstrWebPageDomain);

            hResult = pHiddenIHTMLDocument2->get_all(&pIHTMLElementCollection);
            if (hResult == S_OK)
            {
                  v.vt = VT_BSTR;
                  v.bstrVal = SysAllocString(L"HEAD");

                  hResult = pIHTMLElementCollection->tags(v,&pDisp );
                  if (hResult == S_OK)
                  {
                        hResult = pDisp->QueryInterface(IID_IHTMLElementCollection, (void**)&pIHTMLElementCollection);
                        if (hResult == S_OK)
                        {
                              pIHTMLElementCollection->get_length(&lCollectionSize);

                              v.vt      = VT_I4;
                              v.lVal      = 0;

                              hResult = pIHTMLElementCollection->item(v,v,&pDisp);

                              if (hResult == S_OK && pDisp != NULL)
                              {
                                    hResult = pDisp->QueryInterface(IID_IHTMLElement, (void**)&pHTMLElement);
                                    if (hResult == S_OK)
                                    {
                                          hResult = pHTMLElement->QueryInterface(IID_IHTMLDOMNode,(void**)&pHTMLDOMNode);

                                          if (hResult == S_OK)
                                          {
                                                bstrTemp = SysAllocString(L"BASE");
                                                hResult = pIHTMLDocument2->createElement(bstrTemp, &pNewHTMLElement);
                                                SysFreeString(bstrTemp);

                                                if (hResult == S_OK)
                                                {

                                                      bstrTemp = SysAllocString(L"href");

                                                      v.vt = VT_BSTR;
                                                      v.bstrVal = strWebPageDomain.GetBuffer();

                                                      hResult = pNewHTMLElement->setAttribute(bstrTemp, v, 0);

                                                      SysFreeString(bstrTemp);

                                                      if (hResult == S_OK)
                                                      {
                                                            hResult = pNewHTMLElement->QueryInterface(IID_IHTMLDOMNode,(void**)&pNewHTMLDOMNode);
                                                            if (hResult == S_OK)
                                                            {
                                                                  long lType;
                                                                  pNewHTMLDOMNode->get_nodeType(&lType);

                                                                  if (hResult == S_OK)
                                                                  {
                                                                        pNew2HTMLDOMNode = NULL;
                                                                        hResult = pHTMLDOMNode->appendChild(pNewHTMLDOMNode,&pNew2HTMLDOMNode);
                                                                        if (hResult != S_OK)
                                                                        {
                                                                              int a=0;
                                                                        }
                                                                  }
      else
      {
                                                                  }
                                                            }
                                                            else
                                                            {
                                                                                                                        }
                                                      }
                                                      else
                                                      {
                                                      }

                                                }
                                                else
                                                {
                                                }


                                          }
                                          else
                                          {
                                          }
                                    }
                                    else
                                    {
                                    }

                              }
                              else
                              {
                              }


                        }
                        else
                        {
                        }
                  }
                  else
                  {

                  }

            }
            else
            {
            }
      }
      else
      {
      }

ASKER CERTIFIED SOLUTION

DanRollins

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DanRollins

hi shy_amar,
Do you need more help? Please communicate. Thanks!
-- Dan

tinchos

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Accept: DanRollins {http:#9718817}

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