如何按列表框项中间的值对列表框项进行排序 [英] How to sort listbox items by the value in the middle of the listbox item

问题描述

大家好，

我不知道如何在文本中间用一些数字对列表框项目进行排序。

例如，我的列表框有填充列表，其中的项目格式如下：

Hello to all,
I don't have idea how to sort listbox items by some number in the middle of the text.
For example, my listbox has populated list with items in the format like:

ListBox1.Items.Add("Plate: " & oPlateName & "; Angle: - " & strAngle & "; Diameter: " & strDiameter)

并且列表必须按以下值排序：

And list has to be sorted by the value:

strAngle

，它位于列表框项目的中间位置。



非常感谢任何帮助。

TK



我的尝试：



我试过的是：

which is somewhere in the middle of the listbox item.

Any help is very appreciated.
TK

What I have tried:

What I have tried is:

Dim orderedList As List(Of String) = (From item In myList Order By Integer.Parse(item.Substring(item.IndexOf("; Angle: - ") + 1)) Descending Select item).ToList

推荐答案

这是WinForms吗？如果有，你可以这样做：

Is this WinForms? If so, you can do this:

Public Class PlateItem
    Public Plate As String
    Public Angle As Decimal
    Public Diameter As Decimal
    Public Overrides Function ToString() As String
        Return "Plate: " & Plate & "; Angle: - " & Angle & "; Diameter: " & Diameter
    End Function
End Class

'In your function
Dim plateItems As New List(Of PlateItem)
'Loop through items to add
plateItems.Add(New PlateItem with {.Plate = oPlateName, .Angle = strAngle, .Diameter = strDiameter})
'Finish Adding
lstPlateList.Items.AddRange(plateItems.OrderBy(Function(p) p.Angle).ToArray) 'This line had an error. Fixed.

这也可以让你从lstPlate.SelectedItem中提取一个PlateItem对象，你可以拉出角度和diamter from，不需要字符串操作

That will also let you pull out a PlateItem object from lstPlate.SelectedItem which you can pull the angle and diamter from, without needing the string manipulation

我是通过拆分字符串来完成的。这是一个解决方案。

I have done it by splitting a string. Here is a solution.

'Sorting by Angle
  Dim items = (From item In lstPlateList.Items
               Let parts = item.ToString.Split(New String() {"; Angle: - ", "; Diameter: "}, StringSplitOptions.None)
               Order By CInt(parts(1))
               Select item).ToArray
  lstPlateList.Items.Clear()
  lstPlateList.Items.AddRange(items)

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