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vbnet动态二维数据 vbnet二维数组

VB动态二维数组的声明与调用

改成下面这样就OK了:

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关键的代码如下

Option Explicit

Public nstep As Integer

public pe()

Public Sub Form_Load()

'省略其它代码

End Sub

Function Inputss()

Input #1, nstep, dt 'nstep表示时间阶步的数量,dt表示时间步长

redim pe(nstep) As Single

For i = 1 To nstep

Input #1, r(i), pe(i), qpbs(i)

Next i

Close #1

For it = 1 To nstep

q(it) = 0

Next it

End Function

Function topmod()

For it = 1 To nstep

Dim qof As Single, quz As Single

ep = pe(it)

p = r(it)

'省略其它代码

next it

End Function

VB.NET 用二维数组的方式动态加控制 例如在窗体上动态添加GroupBox,然后再在GroupBox里动态添加控件

下面这段代码完成,在窗体上用语句添加2个 GroupBox控件,且在每个GroupBox控件中添加4个 RadioButton 控件。

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

Dim i As Integer

'添加2个GroupBox

Dim MyGroupBox(2) As GroupBox

For i = 1 To 2

'将一个GroupBox控件加入到Form上

MyGroupBox(i) = New GroupBox

Me.Controls.Add(MyGroupBox(i))

'设置该GroupBox控件的属性

MyGroupBox(i).Height = 240

MyGroupBox(i).Width = 600

MyGroupBox(i).Top = (i - 1) * (240 + 20) + 20

MyGroupBox(i).Left = 20

'修改新加入控件的Text值

MyGroupBox(i).Text = "GroupBox" CStr(i)

Next

'每个GroupBox中添加4个单选按钮

Dim MyRadioButton1(4) As RadioButton

Dim MyRadioButton2(4) As RadioButton

For i = 1 To 4

MyRadioButton1(i) = New RadioButton

Me.Controls.Add(MyRadioButton1(i))

MyRadioButton1(i).Parent = MyGroupBox(1)

'设置该GroupBox控件的属性

MyRadioButton1(i).Height = 20

MyRadioButton1(i).Width = 120

MyRadioButton1(i).Top = (i - 1) * (20 + 20) + 40

MyRadioButton1(i).Left = 20

'修改新加入控件的Text值

MyRadioButton1(i).Text = "RadioButton1_" CStr(i)

Next

For i = 1 To 4

MyRadioButton2(i) = New RadioButton

Me.Controls.Add(MyRadioButton2(i))

MyRadioButton2(i).Parent = MyGroupBox(2)

'设置该GroupBox控件的属性

MyRadioButton2(i).Height = 20

MyRadioButton2(i).Width = 120

MyRadioButton2(i).Top = (i - 1) * (20 + 20) + 40

MyRadioButton2(i).Left = 20

'修改新加入控件的Text值

MyRadioButton2(i).Text = "RadioButton2_" CStr(i)

Next

End Sub

VB 中定义二维动态数组的方法

ReDim 语句支持这样的语法,它与固定数组中使用的语法相同。对于每一维数,每个 ReDim 语句都能改变元素数目以及上下界。但是,数组的维数不能改变。

ReDim DynArray (4 to 12)

例如,用第一次声明在模块级所建立的动态数组 Matrix1:

Dim Matrix1 () As Integer

然后,在过程中给数组分配空间:

Sub CalcValuesNow ()

.

.

.

ReDim Matrix1 (19, 29)

End Sub

这里的 ReDim 语句给 Matrix 分配一个 20 × 30 的整数矩阵(元素总大小为 600)。

VB.NET 动态二维数组如何循环赋值和取值

for i =0 to ...

for j =0 to ...

keyarray(i,j)=

next

next

双重循环,赋值和读取一样


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