Question

need to change this:

<select name="asdf">
    <option selected>a</option>
    <option>b</option>
    <option>c</option>
</select>

I got the HtmlElement but cant change it via htmlEle.SetAttribute("value", "c");

I want to change the selected option from a to c.

Answer 1

Once you have the element, you can loop through the children and update the selected attribute:

var ele = webBrowser1.Document.GetElementById("asdf");

if (ele != null)
{
    foreach (HtmlElement child in ele.Children)
    {
        child.SetAttribute("selected", "false");
        if (child.InnerText == "c")
            child.SetAttribute("selected", "true");
    }
}