我正在尝试选择一个项目从下拉列表中，但是代码不起作用。不确定那里出了什么问题。
来源：
<ul class="squireToolbar-select-list squireToolbar-editor-mode"> <li class="squireToolbar-select-item" data-squire-actions="setTextDirectionLTR"> <i class="fa fa-check"></i> <span translate-context="Option" translate="">Left to Right</span> </li> <li class="squireToolbar-select-item" data-squire-actions="setTextDirectionRTL"> <i class="fa fa-check"></i> <span translate-context="Option" translate="">Right to Left</span> </li> <li class="squireToolbar-dropdown-divider"></li> <li class="squireToolbar-select-item" data-squire-actions="setEditorMode" data-value="text/html"> <i class="fa fa-check"></i> <span translate-context="Composer Mode" translate="">Normal</span> </li> <li class="squireToolbar-select-item" data-squire-actions="setEditorMode" data-value="text/plain"> <i class="fa fa-check"></i> <span translate-context="Composer Mode" translate="">Plain Text</span> </li> <li class="squireToolbar-dropdown-divider"></li> <li class="squireToolbar-select-item" data-squire-actions="sign"> <i class="fa fa-check"></i> <span translate-context="More Toggles" translate="">Sign message</span> </li> <li class="squireToolbar-dropdown-divider"></li> <li class="squireToolbar-select-item" data-squire-actions="addKey"> <i class="fa fa-check"></i> <span translate-context="More Toggles" translate="">Attach Public Key</span> </li> <li class="squireToolbar-dropdown-divider"></li> <li class="squireToolbar-select-item" data-squire-actions="requestReadReceipt"> <i class="fa fa-check"></i> <span translate-context="More Toggles" translate="">Request Read Receipt</span> </li> </ul>
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GeckoElementCollection ComposerTags = (geckoWebBrowser1.Document.GetElementsByTagName("button"));
foreach (GeckoElement currentTag in ComposerTags)
{
if (currentTag.GetAttribute("class").Equals("squireDropdown-item-label squireToolbar-action-modeEditor"))
{
((GeckoHtmlElement)currentTag).Click();
GeckoLIElement fvalue = (GeckoLIElement)currentTag;
}
}
GeckoElementCollection NormalTags = geckoWebBrowser1.Document.GetElementsByTagName("ul");
foreach (GeckoElement currentTag in NormalTags)
{
GeckoHtmlElement finalValue = (GeckoHtmlElement)currentTag;
if (finalValue.InnerHtml.Equals("Normal"))
{
finalValue.Click();
MessageBox.Show(finalValue.OuterHtml);
}
}
