Question

我从w3school收集了这段代码并稍微更改了代码。但是现在stristr（）并没有按照我的意愿工作。例如，当我键入＆＃34; E＆＃34;时，结果显示＆＃34; EVA＆＃34; 5次，当我输入＆＃34; Ev＆＃34;它正在展示＆＃34; Eva＆＃34;需要注意的是，数组有5个单词以＆＃34开头; E＆＃34;并且3个单词以＆＃34; Ev＆＃34;开头。另一个问题是，如何将用户名保存为JSON文件中的数组元素，并循环搜索提示的数据（用户名）。这意味着我不知道＃39;我想使用这样的硬编码数据而不想使用动态数据进行搜索预测。

<?php
// Array with names
$a[] = "Anna";
$a[] = "Brittany";
$a[] = "Cinderella";
$a[] = "Diana";
$a[] = "Eva";
$a[] = "Fiona";
$a[] = "Gunda";
$a[] = "Hege";
$a[] = "Inga";
$a[] = "Johanna";
$a[] = "Kitty";
$a[] = "Linda";
$a[] = "Nina";
$a[] = "Ophelia";
$a[] = "Petunia";
$a[] = "Amanda";
$a[] = "Raquel";
$a[] = "Cindy";
$a[] = "Doris";
$a[] = "Eve";
$a[] = "Evita";
$a[] = "Sunniva";
$a[] = "Tove";
$a[] = "Unni";
$a[] = "Violet";
$a[] = "Liza";
$a[] = "Elizabeth";
$a[] = "Ellen";
$a[] = "Wenche";
$a[] = "Vicky";

// get the q parameter from URL
$q = $_REQUEST["q"];

$hint = "";

// lookup all hints from array if $q is different from "" 
if ($q !== "") {
    $q = strtolower($q);
    $len=strlen($q);
    foreach($a as $name) {
        if (stristr( substr($name, 0, $len),$q)) {
            if ($hint === "") {
               $Name= stristr( substr($name,0),$q);
                $hint =$Name;
            } else {
                $hint .= ", $Name";
            }
        }
    }
}

// Output "no suggestion" if no hint was found or output correct values 
echo $hint === "" ? "no suggestion" : $hint;
?>

Answer 1

修改：应为using System.ComponentModel; namespace ListView2.Model { class Notification : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public void OnPropertyChanged(string propertyName) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } } }

您可以更改循环，以便将找到的结果放入数组中：

using System.Collections.ObjectModel;
using Windows.UI.Xaml.Controls;
using ListView2.Model;

namespace ListView2.ViewModel
{
    class NoteViewModel : Notification
    {
        #region Instance Fields
        private ObservableCollection<Note> _notes;
        private RelayCommand _addNoteCommand;
        private RelayCommand _deleteNoteCommand;
        //private string _noteText;
        #endregion

        #region Constructors
        public NoteViewModel()
        {
            //adds sample data to Notes property (ObservableCollection<Note>)
            Notes = new ObservableCollection<Note>() { new Note("Sample text 1"), new Note("Sample text 2") };

            //Used for testing the deletion of items from ObservableCollection-------------------------------------
            Notes.RemoveAt(1);
            Notes.Add(new Note("Sample text 3"));
            //foreach (var item in Notes)
            //{
            //    if (item.NoteText == "Sample text 3")
            //    {
            //        DoDeleteNote(item);
            //        break;
            //    }
            //}
            //------------------------------------------------------

            //Button command methods are added to delegates
            AddNoteCommand = new RelayCommand(DoAddNote);
            DeleteNoteCommand = new RelayCommand(DoDeleteNote);
        }
        #endregion

        #region Properties
        public ObservableCollection<Note> Notes { get { return _notes; } set { _notes = value; OnPropertyChanged("Notes"); } }

        //public string NoteText { get { return _noteText; } set { _noteText = value; OnPropertyChanged("NoteText"); } }

        public RelayCommand AddNoteCommand { get { return _addNoteCommand; } set { _addNoteCommand = value; } }

        public RelayCommand DeleteNoteCommand { get { return _deleteNoteCommand; } set { _deleteNoteCommand = value; } }

        #endregion

        #region methods

        private void DoAddNote(object obj)
        {
            var newItem = obj as string;
            if (!string.IsNullOrEmpty(newItem))
            {
                AddNote(newItem);
            }
        }

        //Work in progress
        private void DoDeleteNote(object obj)
        {
            //Used when the XAML Delete Button invokes this method
            TextBlock textBlockSender = obj as TextBlock;
            //string myString = textBlockSender.Text;
            Note itemToDelete = textBlockSender.DataContext as Note;

            //Used when the constuctor invokes this method, for testing purposes------------
            //Note itemToDelete = obj as Note;
            //--------------------------------------------------------

            foreach (Note note in this.Notes)
            {
                if (note.NoteText == itemToDelete.NoteText)
                {
                    //int noteIndex = Notes.IndexOf(note);
                    //Notes.RemoveAt(noteIndex);
                    DeleteNote(note);
                    break;
                }
            }
            //if (Notes.Contains(itemToDelete))
            //{
            //    Notes.Remove(itemToDelete);
            //}
        }

        public void AddNote(string noteText)
        {
            this.Notes.Add(new Note(noteText));
        }

        public void DeleteNote(Note itemToDelete)
        {
            this.Notes.Remove(itemToDelete);
        }
        #endregion
    }
}

php stristr（）无法正常工作

1 个答案: