Question

我想从列表框中获取一堆项目，将它们添加到数组中，对其进行排序，然后将其放回到不同的列表框中。以下是我的想法：

ArrayList q = new ArrayList();
        foreach (object o in listBox4.Items)
            q.Add(o);
        q.Sort();
        listBox5.Items.Add(q.ToString());

但它不起作用。有什么想法吗？

Answer 1

您可以使用ListBox.Sorted内置功能

  foreach (object o in listBox4.Items)
  {
    listBox5.Items.Add(o);
  }
  listBox5.Sorted = true;

设置ListBox5.Sorted = true将确保列表框中的项目已排序，并且添加到列表框中的所有后续项目将按正确的顺序添加。

当然，这假设您的示例中提供了简单的排序要求。

Answer 2

ArrayList q = new ArrayList(); 
foreach (object o in listBox4.Items) 
        q.Add(o);
} 
q.Sort(); 
listBox5.Items.Clear();
foreach(object o in q){
    listBox5.Items.Add(o); 
}

Answer 3

试试这个：

var list = lstBox.Items.Cast<ListItem>().OrderBy(item => item.Text).ToList();
lstBox.Items.Clear();
foreach (ListItem listItem in list)
{
    lstBox.Items.Add(listItem);
}

如果您需要按值排序，只需使用item.Value切换item.Text。

享受！

Answer 4

将项添加到数组并关闭循环。然后对数组值进行排序并将其绑定到列表框

Answer 5

尝试AddRange

    ArrayList q = new ArrayList();

    foreach (object o in listBox4.Items)
        q.Add(o);
    q.Sort();

    listBox5.Items.AddRange(q.ToArray());

Answer 6

如果您正在使用.Net3.5使用linq来完成此任务。这里我使用列表进行转换和排序

        var list = ListBox1.Items.Cast<ListItem>().Select(item => item.Value).ToList();
        list.Sort();

        ListBox2.DataSource =list;
        ListBox2.DataBind();

Answer 7

    private void SortListBox(ListBox listBox)
    {
        SortedList<string, string> list = new SortedList<string, string>(); 
        foreach (ListItem i in listBox.Items) {
                list.Add(i.Text, i.Value);
        } 
        listBox.Items.Clear();
        foreach(KeyValuePair<string, string> i in list){
            listBox.Items.Add(new ListItem(i.Key, i.Value)); 
        }
    }

Answer 8

你也可以使用＆＃34;扩展方法＆＃34;我写道：

public static class ExtensionMethods
{
    public static void Sort(this ListControl lb, bool desc = false)
    {
        var list = lb.Items.Cast<ListItem>().ToArray();
        list = desc
                    ? list.OrderByDescending(x => x.Text).ToArray()
                    : list.OrderBy(x => x.Text).ToArray();
        lb.Items.Clear();
        lb.Items.AddRange(list);
    }
    public static void SortByValue(this ListControl lb, bool desc = false)
    {
        var list = lb.Items.Cast<ListItem>().ToArray();
        list = desc
                    ? list.OrderByDescending(x => x.Value).ToArray()
                    : list.OrderBy(x => x.Value).ToArray();
        lb.Items.Clear();
        lb.Items.AddRange(list);
    }
    public static void SortByText(this ListControl lb, bool desc = false)
    {
        lb.Sort(desc);
    }
    public static void SortRandom(this ListControl lb)
    {
        var list = lb.Items.Cast<ListItem>()
                            .OrderBy(x => Guid.NewGuid().ToString())
                            .ToArray();
        lb.Items.Clear();
        lb.Items.AddRange(list);
    }
}

Answer 9

排序列表框描述

void sort()
    {
        if (listBox1.Items.Count <= 1)
            return;
        for (int j = 0; j < listBox1.Items.Count - 1; j++)
        {
            for (int i = 0; i < listBox1.Items.Count - 1; i++)
            {
                listBox1.SetSelected(i, true);
                string a = listBox1.SelectedItem.ToString();
                listBox1.SetSelected(++i, true);
                i--;
                string b = listBox1.SelectedItem.ToString();
                if (b.CompareTo(a) == 1)
                {
                    listBox1.Items.RemoveAt(i);
                    listBox1.Items.Insert(i, b);
                    i++;
                    listBox1.Items.RemoveAt(i);
                    listBox1.Items.Insert(i, a);
                    i--;
                }
            }
        }
    }

Answer 10

protected void Sort(ListBox lbox)
    {
        try
        {
            List<KeyValuePair<string, string>> ListBoxList = new 
            List<KeyValuePair<string, string>>();
            foreach (ListItem li in lbox.Items)
            {
                ListBoxList.Add(new KeyValuePair<string, string>(li.Value, li.Text));
            }
            if (ListBoxList.Count > 0)
            {
                ListBoxList = ListBoxList.OrderBy(x => x.Value).ToList();
                lbox.DataTextField = "Value";
                lbox.DataValueField = "Key";
                lbox.DataSource = ListBoxList;
                lbox.DataBind();
            }
        }
        catch (Exception error)
        {
            error.WriteEvent();
            throw;
        }
    }

Answer 11

对于ASP.NET列表框：

    private void SortListBox(ListBox oListBox)
    {
        ListBox oSortedListBox = new ListBox();
        oSortedListBox.DataSource = oListBox.Items.Cast<ListItem>().ToDictionary(i => i.Value, i => i.Text).OrderBy(i => i.Value);
        oSortedListBox.DataValueField = "Key";
        oSortedListBox.DataTextField = "Value";
        oSortedListBox.DataBind();

        oListBox.Items.Clear();

        foreach (ListItem oListItem in oSortedListBox.Items)
        {
            oListBox.Items.Add(oListItem);
        }
    }

Answer 12

尝试以下操作，而不向任何数组添加元素

Listbox5.Items.AddRange(Listbox4.Items);
Listbox5.Sorted=true;

对列表框中的项目列表进行排序

12 个答案: