Question

现在我有一个搜索字段，旁边有一个提交搜索按钮。但是要删除按钮，以便用户可以按Enter键。我需要更改什么？

 <%= form_tag search_path, method: :get do %>
  <div class="row">
    <div class="col-md-5">
      <%= text_field_tag :search, params[:search], placeholder: "z.B. New York", class: "suchfeld", id: "autolocation" %>
    </div>

    <div class="row">
      <div class="col-md-2">
        <%= submit_tag "Search", class: "btn btn-normal btn-block" %>
      </div>
    </div>

  </div>
  <br/><br/>


<% end %>

Answer 1

可以使用jquery或javascript

完成

1->为表单和输入字段提供唯一的ID，该ID将在按回车键时提交

List<PathInfo> pathInfos = new List<PathInfo>();
HttpHelper.GetAllFilePathAndSubDirectory("http://localhost:33333/", pathInfos);
HttpHelper.PrintAllPathInfo(pathInfos);

2->使用jQuery检查是否按下了输入按钮，然后提交此表单

public static class HttpHelper
{
    public static string ReadHtmlContentFromUrl(string url)
    {
        string html = string.Empty;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        using (Stream stream = response.GetResponseStream())
        using (StreamReader reader = new StreamReader(stream))
        {
            html = reader.ReadToEnd();
        }
        //Console.WriteLine(html);
        return html;
    }

    public static void GetAllFilePathAndSubDirectory(string baseUrl, List<PathInfo> pathInfos)
    {
        Uri baseUri = new Uri( baseUrl.TrimEnd('/') );
        string rootUrl = baseUri.GetLeftPart(UriPartial.Authority);

        Regex regexFile = new Regex("[0-9] <a href=\"(http:)?(?<file>.*?)\"", RegexOptions.IgnoreCase);
        Regex regexDir = new Regex("dir.*?<a href=\"(http:)?(?<dir>.*?)\"", RegexOptions.IgnoreCase);

        string html = ReadHtmlContentFromUrl(baseUrl);
        //Files
        MatchCollection matchesFile = regexFile.Matches(html);
        if (matchesFile.Count != 0)
            foreach (Match match in matchesFile)
                if (match.Success)
                    pathInfos.Add(
                        new PathInfo( rootUrl + match.Groups["file"], false));
        //Dir
        MatchCollection matchesDir = regexDir.Matches(html);
        if (matchesDir.Count != 0)
            foreach (Match match in matchesDir)
                if (match.Success)
                {
                    var dirInfo = new PathInfo(rootUrl + match.Groups["dir"], true);
                    GetAllFilePathAndSubDirectory(dirInfo.AbsoluteUrlStr, dirInfo.Childs);
                    pathInfos.Add(dirInfo);
                }                        

    }


    public static void PrintAllPathInfo(List<PathInfo> pathInfos)
    {
        pathInfos.ForEach(f =>
        {
            Console.WriteLine(f.AbsoluteUrlStr);
            PrintAllPathInfo(f.Childs);
        });
    }

}



public class PathInfo
{
    public PathInfo(string absoluteUri, bool isDir)
    {
        AbsoluteUrl = new Uri(absoluteUri);
        IsDir = isDir;
        Childs = new List<PathInfo>();
    }

    public Uri AbsoluteUrl { get; set; }

    public string AbsoluteUrlStr
    {
        get { return AbsoluteUrl.ToString(); }
    }

    public string RootUrl
    {
        get { return AbsoluteUrl.GetLeftPart(UriPartial.Authority); }
    }

    public string RelativeUrl
    {
        get { return AbsoluteUrl.PathAndQuery; }
    }

    public string Query
    {
        get { return AbsoluteUrl.Query; }
    }

    public bool IsDir { get; set; }
    public List<PathInfo> Childs { get; set; }


    public override string ToString()
    {
        return String.Format("{0} IsDir {1} ChildCount {2} AbsUrl {3}", RelativeUrl, IsDir, Childs.Count, AbsoluteUrlStr);
    }
}

Answer 2

您可以使用CSS简单地隐藏按钮。 {display: none}。但是不要删除按钮。（如果您使用的是boostrap，请尝试将d-none类添加到“提交”按钮。）这将使用Enter键提交表单。

按回车搜索

2 个答案: