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Thread: Using getElementById() to get values from drop down list

  1. #1
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    Default Using getElementById() to get values from drop down list

    Hi, I am using Netbeans to write this program. I have this .java page that gets the url of the HtmlPage from the .properties page. And when this page is opened in the browser, there are drop down lists that have values I want to get from the user when he/she has selected, and save it to a database. I'm actually using mozilla firefox to open this page, and using firebug to inspect the drop down list element.

    I know getElementById is a javascript code, however, my friend told me to use it in the .java page. This is how part of my code looks like. What I'm not sure is how to implement getElementById() and where.

    HtmlPage pageMain =EBPage;
    WebRequest postRequestSettings = new WebRequest(
    new URL(getProperties("trustAdmin")), HttpMethod.POST);
    // Set the request parameters
    postRequestSettings.setRequestParameters(new ArrayList());
    postRequestSettings.getRequestParameters().add(new NameValuePair("component", "edit"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("formids", "unixTime,instance,time,description,message"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("page", "Status"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("service", "direct"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("session", "T"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("submitmode", "submit"));
    postRequestSettings.getRequestParameters().add(new NameValuePair("submitname", ""));
     
    // Insert instance of message here
    postRequestSettings.getRequestParameters().add(new NameValuePair("instance", instance));
    // Insert content of message here
    postRequestSettings.getRequestParameters().add(new NameValuePair("message", message));
    // Insert description of message here
    postRequestSettings.getRequestParameters().add(new NameValuePair("description", description));
    // Insert time of message here
    postRequestSettings.getRequestParameters().add(new NameValuePair("time", time));
    // Convert time to unix seconds
    postRequestSettings.getRequestParameters().add(new NameValuePair("unixTime", String.valueOf(System.currentTimeMillis() / 1000)));
    HtmlPage newPage1 = pageMain.getWebClient().getPage(postRequestSettings);
    WebRequest requestSettings = new WebRequest(
    new URL("http://www.google.com"), HttpMethod.GET);
    requestSettings.setRequestParameters(new ArrayList());
    requestSettings.getRequestParameters().add(new NameValuePair("page", "Preview"));
    requestSettings.getRequestParameters().add(new NameValuePair("service", "page"));
    newPage1 = newPage1.getWebClient().getPage(requestSettings);

    And I'm told to insert page.getElementById() in the place shown below:

    HtmlPage page = null;
    page.getElementById() 
    try {
    // Login proxy
    page = (HtmlPage) jsonBrowser.getPage(getProperties("jsonBrowser"));
    String proxyUrl = page.getForms().get(0).getAttribute("action");
    System.out.println("Proxy Url" + proxyUrl);
    WebRequest requestSettings = new WebRequest(
    new URL(proxyUrl), HttpMethod.POST);
    requestSettings.setRequestParameters(new ArrayList());
    requestSettings.getRequestParameters().add(new NameValuePair("PROXY_SG_PASSWORD", password));
    requestSettings.getRequestParameters().add(new NameValuePair("PROXY_SG_PRIVATE_CHALLENGE_STATE", ""));
    requestSettings.getRequestParameters().add(new NameValuePair("PROXY_SG_REQUEST_ID", ""));
    requestSettings.getRequestParameters().add(new NameValuePair("PROXY_SG_USERNAME", userID));
    // Get the page
    page = page.getWebClient().getPage(requestSettings);
    Logger.getLogger(postTrustMessage.class.getName()).log(Level.INFO, "===================================Login in Trust");
    Logger.getLogger(postTrustMessage.class.getName()).log(Level.INFO, page.getWebResponse().getContentAsString());
    } catch (IOException ex) {
    Logger.getLogger(postTrustMessage.class.getName()).log(Level.SEVERE, null, ex);
    } catch (FailingHttpStatusCodeException ex) {
    Logger.getLogger(postTrustMessage.class.getName()).log(Level.SEVERE, null, ex);
    }
    return page;

    Any help would be greatly appreciated. Thanks.
    Last edited by helloworld922; January 5th, 2011 at 04:00 AM.


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    Default Re: Using getElementById() to get values from drop down list

    postRequestSettings.setRequestParameters(new ArrayList());

    ArrayList has a generic parameter.

    What about

    postRequestSettings.setRequestParameters(new ArrayList<NameValuePair>());

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    Default Re: Using getElementById() to get values from drop down list

    Quote Originally Posted by javapenguin View Post
    postRequestSettings.setRequestParameters(new ArrayList());

    ArrayList has a generic parameter.

    What about

    postRequestSettings.setRequestParameters(new ArrayList<NameValuePair>());
    I'm sorry, but what do you mean by generic parameter? How can getElementById() be used here? Thanks
    Last edited by oric1; January 5th, 2011 at 10:54 PM.

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    Default Re: Using getElementById() to get values from drop down list

    Quote Originally Posted by oric1 View Post
    I'm sorry, but what do you mean by generic parameter? How can getElementById() be used here? Thanks
    It means to set the array list type using Generics, which has absolutely nothing to do with actually answering your question.

    If I understand your problem completely, what you wish to do is not trivial (dynamically save a user selected value on the fly in a webpage using javascript). I'd recommend the easier route, which is to have the user make all selections in an HTML form, then upon submission of the form go to another page with does all the model/database modification.

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