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Private WithEvents fw As IO.FileSystemWatcher
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Private Shared Sub OnChanged(source As Object, e As IO.FileSystemEventArgs) Handles fw.Changed '更改指定路径中的目录和文件时引发该事件
MsgBox(e.Name)
End Sub
设计一个窗口,添加一个名为textBox1的System.Windows.Forms.TextBox,
添加一个名为button1的System.Windows.Forms.Button。
为button1的单击事件添加如下处理函数:
Sub Button1Click(sender As Object, e As EventArgs)
'f是你的文本文件的文件名
Const f As String="t.txt"
Dim sw As System.IO.StreamWriter=Nothing
Try
If Not System.IO.File.Exists(f) Then
sw=System.IO.File.CreateText(f)
Else
sw=New System.IO.StreamWriter(f,True)
End If
sw.WriteLine(textBox1.Text)
Finally
If sw IsNot Nothing Then
sw.close()
End If
End Try
End Sub
1.新建一张表格,在表格中导入学生的成绩表,如图所示,将建立一个按钮,通过它来实现查找。
2.单击菜单栏中的“开发工具”——插入——表单控件——按钮,在出现的十字箭头上拖住画出一个按钮,如图所示。
3.在弹出的查找红对话框中选择“录制”,在弹出的“录制新宏”对话框中,修改宏名称为“查找”,单击确定。
4. 单击“开发工具”——查看代码,打开VBA编辑器,如图所示。
5.现在输入代码:
Sub 查找()
Dim jieguo As String, p As String, q As String
Dim c As Range
jieguo = Application.InputBox(prompt:="请输入要查找的值:", Title:="查找", Type:=2)
If jieguo = "False" Or jieguo = "" Then Exit Sub
Application.ScreenUpdating = False
Application.DisplayAlerts = False
With ActiveSheet.Cells
Set c = .Find(jieguo, , , xlWhole, xlByColumns, xlNext, False)
If Not c Is Nothing Then
p = c.Address
Do
c.Interior.ColorIndex = 4
q = q c.Address vbCrLf
Set c = .FindNext(c)
Loop While Not c Is Nothing And c.Address p
End If
End With
MsgBox "查找数据在以下单元格中:" vbCrLf vbCrLf _
q, vbInformation + vbOKOnly, "查找结果"
Application.ScreenUpdating = True
Application.DisplayAlerts = True
End Sub
6.现在回到EXCEL表格,右击按钮,选择“编辑文字”,修改按钮名称为“查找按钮”。
7. 现在单击查找按钮,出现对话框“请输入要查找的值”,在方框中输入“男”,单击确定,出现对话框“查找数据在一下单元格中”,单击确定,对应单元格就变成了亮色。
获取方法,参考实例如下:
'获取路径名各部分: 如: c:\dir1001\aaa.txt
'获取路径路径 c:\dir1001\
Public Function GetFileName(FilePathFileName As String) As String '获取文件名 aaa.txt
On Error Resume Next
Dim i As Integer, J As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, "\")
GetFileName Mid(FilePathFileName, J + 1, i)
End Function
''获取路径路径 c:\dir1001\
Public Function GetFilePath(FilePathFileName As String) As String '获取路径路径 c:\dir1001\
On Error Resume Next
Dim J As Integer
J InStrRev(FilePathFileName, "\")
GetFilePath Mid(FilePathFileName, 1, J)
End Function
'获取文件名但不包括扩展名 aaa
Public Function GetFileNameNoExt(FilePathFileName As String) As String '获取文件名但不包括扩展名 aaa
On Error Resume Next
Dim i As Integer, J As Integer, k As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, "\")
k InStrRev(FilePathFileName, ".")
If k 0 Then
GetFileNameNoExt Mid(FilePathFileName, J + 1, i - J)
Else
GetFileNameNoExt Mid(FilePathFileName, J + 1, k - J - 1)
End If
End Function
'===== '获取扩展名 .txt
Public Function GetFileExtName(FilePathFileName As String) As String '获取扩展名 .txt
On Error Resume Next
Dim i As Integer, J As Integer
i Len(FilePathFileName)
J InStrRev(FilePathFileName, ".")
If J 0 Then
GetFileExtName ".txt"
Else
GetFileExtName Mid(FilePathFileName, J, i)
End If
End Function
说明:以下代码在Microsoft Visual Basic 2005 (简体中文版)中通过。
创建新项目:
在窗体上添加文本框2个:TextBox1,TextBox2
TextBox1 -- 用来编辑要写入的文本文件的内容,或显示打开的文本文件的内容
TextBox2 -- 用来输入要打开或要写入的文件名(包括盘符,路径)(例如:c:\123.txt)
在窗体上添加2个按钮:Button1,Button2
Button1 -- 写入文件
Button2 -- 打开文件
代码如下:
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim w As New StreamWriter(TextBox2.Text)
w.Write(TextBox1.Text)
w.Close()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim r As New StreamReader(TextBox2.Text)
Dim s As String
TextBox1.Text = ""
Do While r.Peek -1 '是否到文件尾
s = r.ReadLine
' MessageBox.Show(r.Peek)
TextBox1.Text = TextBox1.Text s vbCrLf
Loop
r.Close()
End Sub
End Class
补充:你要把读出的数据赋值给一个变量,只要:声明一个变量为数值类型,然后只要读取一行就可以了,把这行数据经过转换成数值后赋给这个变量.
Function ByteToBin(m As Byte) As String ' 将字节型数据转换成八位二进制字符串
Dim c$
c$ = ""
Do While m 0
r = m Mod 2
m = m \ 2
c$ = r c$
Loop
c$ = Right("00000000" c$, 8)
ByteToBin = c$
End Function
Function Reverse(m As String) As String ' 将八位二进制字符串颠倒顺序
Dim i%, x$
x = ""
For i = 1 To 8
x = Mid(m, i, 1) x
Next i
Reverse = x
End Function
Function BinToByte(m As String) As Byte ' 将八位二进制串转换成十进制
Dim x As String * 1, y%, z%
z = 0
For i = 1 To 8
x = Mid(m, i, 1)
y = x * 2 ^ (8 - i)
z = z + y
Next i
BinToByte = z
End Function
Private Sub Command1_Click()
Dim x As Byte, i%, fname$
fname = InputBox("请输入要加密的文件名!注意加上路径名:")
If Dir(fname) = "" Then
MsgBox "文件不存在!"
Exit Sub
End If
Open fname For Binary As #1 ' 以二进制访问模式打开待加密文件
For i = 1 To LOF(1) ' LOF函数是求文件长度的内部函数
Get #1, i, x ' 取出第i个字节
x = BinToByte(Reverse(ByteToBin(x))) ' 这里调用了三个自定义函数
Put #1, i, x ' 将加密后的这个字节写回到文件原位置
Next i
Close
MsgBox "完成!"
End Sub
退出:Unload Me
网上帮你找的,如果不符合你的要求,你可以再去网上在搜搜,有很多代码的。