vb.net课程设计 vb程序设计教学设计

求VB.net程序源代码 绘图板、二十一点游戏、计算器、井字棋游戏、屏幕保护程序等

说明：1.共有4个文本框其，其中三个是填入或输出数据的（名称分别是：txta txtb txtc），剩下的那个是符号(txtd)2.共7个按钮，4个是符号按钮，一个计算，一个清零．这是我弄的程序”袖珍计算器”代码也是自己编写的，代码如下：通用声明Dim j As Integer '定义j为整型

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Private Sub Text1_Change()End SubPrivate Sub Command1_Click()

txtfuhao.Text = "+" '将”＋”显示到文本框txtfuhao.Text中

End SubPrivate Sub Command2_Click()

txtfuhao.Text = "-" ''将”-”显示到文本框txtfuhao.Text中

End SubPrivate Sub Command3_Click()

txtfuhao.Text = "×" '将”×”显示到文本框txtfuhao.Text中

End SubPrivate Sub Command4_Click()

txtfuhao.Text = "÷" 将”÷”'显示到文本框txtfuhao.Text中

End Sub

Private Sub Command5_Click()

Dim a, b, c As Integer

a = Val(txta.Text) '将txta.Text里的内容转化为数值型,然后再赋给a

b = Val(txtb.Text) '将txtb.Text里的内容转化为数值型,然后再赋给b

If txtfuhao.Text = "+" Then '运算过程

c = a + b '运算过程

ElseIf txtfuhao.Text = "-" Then '运算过程

c = a - b '运算过程

ElseIf txtfuhao.Text = "÷" Then '运算过程

c = a / b '运算过程

ElseIf txtfuhao.Text = "×" Then '运算过程

c = a * b '运算过程

Else

j = MsgBox("您输入的符号不正确", vbOKOnly, "错误信息")

End If

txtc.Text = c '将运算结果c输出到文本框txtc中

End SubPrivate Sub Command6_Click()

txta.Text = "" '将空字符输入到文本框内（刷新）

txtb.Text = "" '将空字符输入到文本框内（刷新）

txtc.Text = "" '将空字符输入到文本框内（刷新）

txtfuhao.Text = "" '将空字符输入到文本框内（刷新）

End SubPrivate Sub Command7_Click()

End '结束程序

End SubPrivate Sub Form_Load()End Sub

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用VB语言制作英汉小辞典

Public Class Form1

Inherits System.Windows.Forms.Form

Public filename As String = "英汉词典.txt"

Public myword(6500, 1) As String

Public words As Integer = 0

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim a As String

Dim b As Integer

Dim i As Integer = 0

Dim n As String

Dim m As String

Dim stringb As Integer

TextBox1.Text = ""

TextBox2.Text = ""

FileOpen(1, "英汉词典.txt", OpenMode.Input)

Do While Not EOF(1)

a = LineInput(1)

b = InStr(a, " ")

n = Microsoft.VisualBasic.Left(a, b - 1)

myword(i, 0) = n

ListBox1.Items.Add(n)

stringb = Len(a) - b

m = Trim(Microsoft.VisualBasic.Right(a, stringb))

myword(i, 1) = m

i += 1

Loop

words = i

FileClose(1)

End Sub

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

Dim i As Integer = -1

If TextBox1.Text = "" Then

MessageBox.Show("不能输入空格，请重新输入")

TextBox2.Text = ""

TextBox1.Focus()

Exit Sub

Else

For i = i + 1 To words

If LCase(TextBox1.Text) = LCase(myword(i, 0)) Then

TextBox2.Text = Trim(myword(i, 1))

Exit Sub

End If

Next

MessageBox.Show(" 您需要的单词不存在，请重新输入")

End If

End Sub

Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged

Try

TextBox1.Text = myword(ListBox1.SelectedIndex, 0)

TextBox2.Text = Trim(myword(ListBox1.SelectedIndex, 1))

Catch ex As Exception

End Try

Exit Sub

End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

Dim ch, enterwords As String

Dim j, m As Integer

If -1 = ListBox1.SelectedIndex Then

MsgBox("请选择单词", , "")

ListBox1.Focus()

Exit Sub

End If

enterwords = InputBox("请修改单词", "修改单词", Trim(myword(ListBox1.SelectedIndex, 0)))

Do While enterwords = ""

m = MsgBox("单词不能为空", MsgBoxStyle.RetryCancel, "修改单词")

If m = 4 Then

enterwords = InputBox("请修改单词", "修改单词", Trim(myword(ListBox1.SelectedIndex, 0)))

Else

Exit Sub

End If

Loop

ch = InputBox("请修改中文意思", "修改单词", Trim(myword(ListBox1.SelectedIndex, 1)))

Do While ch = ""

m = MsgBox("中文意思不能为空", MsgBoxStyle.RetryCancel, "修改单词")

If m = 4 Then

ch = InputBox("请修改中文意思", "修改单词", Trim(myword(ListBox1.SelectedIndex, 1)))

Else

Exit Sub

End If

Loop

myword(ListBox1.SelectedIndex, 1) = ch

myword(ListBox1.SelectedIndex, 0) = enterwords

FileOpen(1, filename, OpenMode.Output)

For j = 0 To words - 1

PrintLine(1, myword(j, 0) " " myword(j, 1))

Next

FileClose(1)

MsgBox("修改成功")

ListBox1.Items.Clear()

Form1_Load(sender, e)

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Dim i As Integer = 0

Dim k, m As Integer

Dim enterwords, ch As String

enterwords = InputBox("请输入要添加的单词", "添加单词")

Do While enterwords = ""

m = MsgBox("单词不能为空，请输入单词！", MessageBoxButtons.RetryCancel, "添加单词")

If m = 4 Then

enterwords = InputBox("请输入要添加的单词", "添加单词")

Else

Exit Sub

End If

Loop

ch = InputBox("请输入中文意思", "添加中文")

Do While ch = ""

m = MsgBox("中文不能为空，请输入中文意思！", MessageBoxButtons.RetryCancel, "添加中文")

If m = 4 Then

ch = InputBox("请输入中文意思", "添加中文")

Else

Exit Sub

End If

Loop

Do While LCase(myword(i, 0)) LCase(enterwords)

i = i + 1

If words = i Then

myword(i, 0) = enterwords

myword(i, 1) = ch

words = words + 1

FileOpen(1, filename, OpenMode.Output)

For i = 0 To words - 1

PrintLine(1, myword(i, 0) " " myword(i, 1))

Next

ListBox1.Items.Clear()

FileClose(1)

ListBox1.Items.Clear()

Form1_Load(sender, e)

MessageBox.Show("添加成功")

Exit Sub

End If

Loop

If LCase(myword(i, 0)) = LCase(enterwords) Then

MessageBox.Show("该单词已存在！")

ListBox1.SelectedIndex = i

Exit Sub

ElseIf LCase(myword(0, 0)) LCase(enterwords) Then

For k = words To 0 Step -1

myword(k + 1, 0) = myword(k, 0)

myword(k + 1, 1) = myword(k, 1)

Next

myword(0, 0) = enterwords

myword(0, 1) = ch

words = words + 1

FileOpen(1, filename, OpenMode.Output)

For i = 0 To words - 1

PrintLine(1, myword(i, 0) " " myword(i, 1))

Next

ListBox1.Items.Clear()

FileClose(1)

Form1_Load(sender, e)

MessageBox.Show("添加成功")

Exit Sub

End If

For k = words To i + 1 Step -1

myword(k + 1, 0) = myword(k, 0)

myword(k + 1, 1) = myword(k, 1)

Next k

myword(i, 0) = enterwords

myword(i, 1) = ch

words = words + 1

FileOpen(1, filename, OpenMode.Output)

For i = 0 To words - 1

PrintLine(1, myword(i, 0) " " myword(i, 1))

Next

FileClose(1)

ListBox1.Items.Clear()

Form1_Load(sender, e)

MessageBox.Show("添加成功")

Exit Sub

End Sub

Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click

Dim i, j, k As Integer

If -1 = ListBox1.SelectedIndex Then

MsgBox("请选择单词", , "")

ListBox1.Focus()

Exit Sub

End If

k = MsgBox("确定是否删除", MsgBoxStyle.YesNo, "提示")

If k = 6 Then

For i = ListBox1.SelectedIndex To words

myword(i, 0) = myword(i + 1, 0)

myword(i, 1) = myword(i + 1, 1)

Next

words = words - 1

FileOpen(1, filename, OpenMode.Output)

For j = 0 To words - 1

PrintLine(1, myword(j, 0) " " myword(j, 1))

Next

FileClose(1)

MsgBox("单词已删除")

ListBox1.Items.RemoveAt(ListBox1.SelectedIndex)

ListBox1.Refresh()

TextBox1.Text = ""

TextBox2.Text = ""

Exit Sub

Else

Exit Sub

End If

End Sub

Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click

TextBox1.Text = ""

TextBox2.Text = ""

End Sub

End Class

这是代码，文字性的内容自己去做。

VB.net和SQL做的课程设计 图书预订系统 请高手指教

可以依靠Baiduhi提醒我们

有机会能够处理你所遇到的工作

具体的要求也能够提醒我们

ES:\\FF8FB115C12C422937C837B3A7220F94

交易提醒:预付定金有风险