vb.net数组排序 vb中数组排序的方法

VB.NET 如何将ListBox列表框的所有项复制到一个数组中，便于排序？谢谢解答

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim ListboxTotalItem As Integer = ListBox1.Items.Count - 1

Dim a(ListboxTotalItem) As String

For i As Integer = 0 To ListboxTotalItem

a(i) = i

Next

Label1.Text = a(5)

End Sub

End Class

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一个Form1

一个Label1

一个Listbox1

一个Button1

在Listbox1中加入10个值

-------------

只是一个演示vb.net数组排序，其vb.net数组排序他vb.net数组排序的要靠自己。

相关问答

Q1: vb.net的随机3个数字，然后排序一下

给你一个最简单的冒泡排序代码：

将三个数放到一个数组中。

a(0)=val(text1.text):a(1)=val(text2.text):a(2)=val(text3.text)

dim flag as Boolean,temp as Integer

for i = 0 to 2

flag = true

for j = 2 to 1

if a(j)a(j-1) then

temp = a(j-1)

a(j-1) = a(j)

a(j) = temp

flag = false

end if

next j

if flag then Exit For

next i

text4.text=a(0):text5.text=a(1):text6.text=a(2)

Q2: 二维数组排序 vb.net

Dim i As Integer, j As Integer, X As Single, Y As Single, M As Single

i = L

j = R

'找出数组的中点

M = MyArray((L + R) / 2, 0)

While (i = j)

'找出比中点大的数

While (MyArray(i, 0) M And i R)

i = i + 1

Wend

'找出比中点小的数

While (M MyArray(j, 0) And j L)

j = j - 1

Wend

'互换这两个数

If (i = j) Then

X = MyArray(i, 0)

Y = MyArray(i, 1)

MyArray(i, 0) = MyArray(j, 0)

MyArray(i, 1) = MyArray(j, 1)

MyArray(j, 0) = X

MyArray(j, 1) = Y

i = i + 1

j = j - 1

End If

Wend

'未完成时递归调用

If (L j) Then Call QuickSort(MyArray(), L, j)

If (i R) Then Call QuickSort(MyArray(), i, R)

End Sub

Q3: VB.NET数组的排序法？

如果你是从vb6刚过渡上vb。net，建议还是用冒泡排序法，容易理解。

如果你正努力学习vb。net的方法，推荐一个例子如下：

Imports System

Imports System.Collections

Public Class SamplesArray

Public Class myReverserClass

Implements IComparer

' Calls CaseInsensitiveComparer.Compare with the parameters reversed.

Function Compare(x As Object, y As Object) As Integer _

Implements IComparer.Compare

Return New CaseInsensitiveComparer().Compare(y, x)

End Function 'IComparer.Compare

End Class 'myReverserClass

Public Shared Sub Main()

' Creates and initializes a new Array and a new custom comparer.

Dim myArr As [String]() = {"The", "QUICK", "BROWN", "FOX", "jumps", "over", "the", "lazy", "dog"}

Dim myComparer = New myReverserClass()

' Displays the values of the Array.

Console.WriteLine("The Array initially contains the following values:")

PrintIndexAndValues(myArr)

' Sorts a section of the Array using the default comparer.

Array.Sort(myArr, 1, 3)

Console.WriteLine("After sorting a section of the Array using the default comparer:")

PrintIndexAndValues(myArr)

' Sorts a section of the Array using the reverse case-insensitive comparer.

Array.Sort(myArr, 1, 3, myComparer)

Console.WriteLine("After sorting a section of the Array using the reverse case-insensitive comparer:")

PrintIndexAndValues(myArr)

' Sorts the entire Array using the default comparer.

Array.Sort(myArr)

Console.WriteLine("After sorting the entire Array using the default comparer:")

PrintIndexAndValues(myArr)

' Sorts the entire Array using the reverse case-insensitive comparer.

Array.Sort(myArr, myComparer)

Console.WriteLine("After sorting the entire Array using the reverse case-insensitive comparer:")

PrintIndexAndValues(myArr)

End Sub 'Main

Public Shared Sub PrintIndexAndValues(myArr() As [String])

Dim i As Integer

For i = 0 To myArr.Length - 1

Console.WriteLine(" [{0}] : {1}", i, myArr(i))

Next i

Console.WriteLine()

End Sub 'PrintIndexAndValues

End Class 'SamplesArray

'This code produces the following output.

'

'The Array initially contains the following values:

' [0] : The

' [1] : QUICK

' [2] : BROWN

' [3] : FOX

' [4] : jumps

' [5] : over

' [6] : the

' [7] : lazy

' [8] : dog

'

'After sorting a section of the Array using the default comparer:

' [0] : The

' [1] : BROWN

' [2] : FOX

' [3] : QUICK

' [4] : jumps

' [5] : over

' [6] : the

' [7] : lazy

' [8] : dog

'

'After sorting a section of the Array using the reverse case-insensitive comparer:

' [0] : The

' [1] : QUICK

' [2] : FOX

' [3] : BROWN

' [4] : jumps

' [5] : over

' [6] : the

' [7] : lazy

' [8] : dog

'

'After sorting the entire Array using the default comparer:

' [0] : BROWN

' [1] : dog

' [2] : FOX

' [3] : jumps

' [4] : lazy

' [5] : over

' [6] : QUICK

' [7] : the

' [8] : The

'

'After sorting the entire Array using the reverse case-insensitive comparer:

' [0] : the

' [1] : The

' [2] : QUICK

' [3] : over

' [4] : lazy

' [5] : jumps

' [6] : FOX

' [7] : dog

' [8] : BROWN

Q4: VB.net 数组怎么按任意元素的顺序排序输出

你直接传一个数组进去，而且是一个结构体数组，array.sort怎么知道根据结构中的哪一个属性进行排序？放一个c#的代码你看看，VB和C#很相似的

class Program

{

static void Main(string[] args)

{

People[] p = new People[3]

{

new People{name="张三"},

new People{name="李四"},

new People{name="张二名"}

};

//重点传一个实现了IComparer接口的类进去，告诉Array.Sort怎么排序

Array.Sort(p, new PeopleCompare());

foreach (var item in p)

{

Console.WriteLine(item.name);

}

Console.ReadKey();

}

}

//People结构体，换成类一样的

public struct People

{

public string name { get; set; }

}

//实现了IComparer接口的类

public class PeopleCompare : IComparer

{

public int Compare(object x, object y)

{

People p1 = (People)x ;

People p2 = (People)y;

return p1.name.CompareTo(p2.name);

}

}

Q5: 编写一个 VB.NET 程序,产生 100 个 100 以内的随机数，将他们从大到小排序后输出

Private Sub Command1_Click()

Dim a(1 To 100) As Integer

Dim i As Integer, j As Integer, k As Integer

For i = 1 To 100 '给数组a一百个元素赋值vb.net数组排序，并换每行十个数字输出来窗体上

a(i) = Int(Rnd * 101)

k = k + 1

Print Tab((k - 1) * 5); a(i);

If k = 10 Then k = 0: Print

Next i

Print

Print

For i = 100 To 2 Step -1 '用冒泡排序法对数组进行排序

For j = 1 To i - 1

If a(j) a(j + 1) Then

t = a(j): a(j) = a(j + 1): a(j + 1) = t

End If

Next j

Next i

For i = 1 To 100 '输出排好序vb.net数组排序的数组

k = k + 1

Print Tab((k - 1) * 5); a(i);

If k = 10 Then k = 0: Print

Next i

End Sub

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