How to set "Selected" status of a radio in WebBrowser2 Ctrl?

Posted on 2001-08-10
Medium Priority
Last Modified: 2013-11-20
Hi experts:
    I want to set a HTML radio to the status of selected, the html code is here:
    <input type="radio" name="myradio" value="Value1">Radio Box Value1
    <input type="radio" name="myradio" value="value2">Radio Box Value1

You can see that the two radio is unselected. I want to press a button in my program and select the radio which value="value2".
Please note:
1 They have same name because they are in one group.
2 I can set the *value* of text input box, but the "selected" status is not the value of radio. When a radio is selected, the html code will be:
    <input type="radio" name="myradio" value="Value1" selected>
3 I also want to know how to check/uncheck a check box in WebBrowser2 ctrl.

The following can set value of text input box of CWebBrowser2 m_web;

    IHTMLElementCollection *objAllElement=NULL;
    IHTMLDocument2 *objDocument=NULL;
    IHTMLAnchorElement *objAnchor=NULL;
    CString strUrl;
    objDocument=(IHTMLDocument2 *)m_ctrlWeb.GetDocument();
    objAllElement->item(COleVariant("Name of Textbox"),COleVariant((long)0),&pDisp);
    CComQIPtr<IHTMLInputTextElement, &IID_IHTMLInputTextElement>pElement;
    //If it is a radio box , then use IHTMLOptionButtonEelment here
    pElement->put_value(CString("Value of Textbox").AllocSysString());
Question by:Feya
LVL 49

Accepted Solution

DanRollins earned 400 total points
ID: 6375205
I think that by 'select' you want to 'put a dot into' (that is make it the selected option).  One must use the set_checked() member of IHTMLOptionButtonElement in order to do this.

<Input type=radio value='1' name='MyRadioBtn' CHECKED>Opt1 description<br>
<Input type=radio value='2' name='MyRadioBtn'>Opt2 description<br>
<Input type=radio value='3' name='MyRadioBtn'>Opt3 description<br>

When you use objAllElement->item(...) you will get back a collection of all radio btns with that name UNLESS you specify an index as the second parameter.  To wit:

#include <Mshtml.h>
#include <atlbase.h>

void CMyDlg::OnButton1()
    IHTMLElementCollection *objAllElement=NULL;
    IHTMLDocument2 *objDocument=NULL;

    objDocument=(IHTMLDocument2 *)m_ctlBrowser.GetDocument();

    COleVariant vBtnIdx((long)2); // actually the third button (0 is first)
    objAllElement->item(COleVariant("MyRadioBtn"),vBtnIdx,&pDisp); // <<< the key

    CComQIPtr<IHTMLOptionButtonElement, &IID_IHTMLOptionButtonElement>pElement;
    pElement=pDisp; // need error checking here
Use the same logic with checkboxes, but use the IHTMLInputElement interface.

You could also use the id='Opt1' syntax to give each radio button a unique ID, then you can access each one individually without needing to specify an index.

-- Dan

Author Comment

ID: 6375251
Excellent Answer!

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