[C#]对列表框中的项目进行排序

Question

I'm using Regex to parse HTML:

  private void button2_Click(object sender, EventArgs e)

    {
         string html = textBox1.Text;
        foreach (Match matcha in Regex.Matches(html, @"<(.*?)>(.*?)</(.*?)>"))
        {
            listBox1.Items.Add(matcha.Index.ToString() + matcha);
        }
        foreach (Match matchb in Regex.Matches(html, @"<input type=(.*?)>"))
        {
            listBox1.Items.Add(matchb.Index.ToString() + matchb);
        }}

When button2 pressed, listbox1 has the following items:

1. 25...

2. 29.. .

3. 27.. .

I want to expected Output

1. 25. ..

2. 27...

3. 29...

What should I do?

Answer 1

Add your items to a list, sort it and then make the sorted list source of your ListBox:

private void button2_Click(object sender, EventArgs e)
{
    string html = textBox1.Text;
    List<String> tmp = new List<String>();//Add this
    foreach (Match matcha in Regex.Matches(html, @"<(.*?)>(.*?)</(.*?)>"))
    {
        tmp.Add(matcha.Index.ToString() + matcha);//Change this line
    }
    foreach (Match matchb in Regex.Matches(html, @"<input type=(.*?)>"))
    {
        tmp.Add(matchb.Index.ToString() + matchb);//Change this one too
    }

    var sorted = list.OrderBy(x => PadNumbers(x));//Add this line 
    listBox1.Datasource = sorted;//and this
}

when PadNumbers are defined as:

public static string PadNumbers(string input)
{
    return Regex.Replace(input, "[0-9]+", match => match.Value.PadLeft(10, '0'));
}

This should sort all nubmers as "natural sort" would. So if your numbers will be 8, 90, 10 , this script will sort it as 8, 10, 90 , while normal sort would return 10, 8, 90 .
Is all clear?

Answer 2

在添加项目之前将 sorted 属性设置为 true：

listBox1.sorted = true;

Answer 3

 private void button1_Click(object sender, EventArgs e)
    {

        int num_items = listBox1.Items.Count;
        object[] items = new object[num_items];
        listBox1.Items.CopyTo(items, 0);

        // Sort them by their contained numeric values.
        items = SortNumericItems(items);

        // Display the results.
        listBox1.Sorted = false;
        listBox1.DataSource = items;
    }

 private object[] SortNumericItems(object[] items)
    {
        // Get the numeric values of the items.
        int num_items = items.Length;
        const string float_pattern = @"-?\d+\.?\d*";
        double[] values = new double[num_items];
        for (int i = 0; i < num_items; i++)
        {
            string match = Regex.Match(
                items[i].ToString(), float_pattern).Value;
            double value;
            if (!double.TryParse(match, out value))
                value = double.MinValue;
            values[i] = value;
        }

        // Sort the items array using the keys to determine order.
        Array.Sort(values, items);
        return items;
    }

When button1 pressed, listbox1 has the following items:

1. 25
2. 28
3. 20

output display below