VB中删除、替换或者插入内容到文本中某一行
及解析文本行列的处理实例
VB操作文本文件的方法很多,下面的例子是我自己作项目或者回答网友提问时做的,很有代表性,希望能够给各位朋友一些启发.
´功能:删除、替换文本中一行,或者插入内容到文本中某一行
´作者: soho_andy (冰)
´参数:
´strSourceFile 原始文件完整名
´strTargetFile 生成新文件的完整名
´intRow 操作的行数
Sub 操作文件中一行(strSourceFile As String, strTargetFile As String, intRow As Long)
Dim filenum As Integer
Dim fileContents As String
Dim fileInfo() As String
Dim i As Integer
Dim j As Integer
filenum = FreeFile
Open strSourceFile For Binary As #filenum
fileContents = Space(LOF(filenum))
Get #filenum, , fileContents
Close filenum
fileInfo = Split(fileContents, vbCrLf)
´取出源文件行数,按照回车换行来分隔成数组
filenum = FreeFile
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile
End If
Dim Filestr() As String
´删除一行代码块
Open strTargetFile For Append As #filenum
´循环每一行
For i = 0 To UBound(fileInfo) - 1
If i <> intRow - 1 Then
Print #filenum, fileInfo(i)
End If
Next
Close #filenum
´替换一行代码块
Open strTargetFile For Append As #filenum
´循环每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要替换进去的内容"
End If
Next
Close #filenum
´插入一行代码块
Open strTargetFile For Append As #filenum
´循环每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要插入到这行的内容"
Print #filenum, fileInfo(i) ´保留原来的行,位置后移一位
End If
Next
Close #filenum
MsgBox "完毕"
End Sub
´另外一个解决实际问题的例子
´
´网友的要求
´设有文件a.txt,其中存放了两行数据,数据用逗号分隔,现在要读取第一行的奇数位置的数据写入到另一个文本文件(b.txt)的第一行,类似地,把第二行的奇数位置的数据写入到第二行。
´比如:
´文件a.txt如下:
´1,2,3,4,5
´6,7,8,9,10
´操作完成后,文件b.txt应为
´1,3,5
´6,8,10
´作者: soho_andy (冰)
´参数:
´strSourceFile 原始文件完整名
´strTargetFile 生成新文件的完整名
Sub 提取奇数位数据(strSourceFile As String, strTargetFile As String)
Dim filenum As Integer
Dim fileContents As String
Dim fileInfo() As String
Dim i As Integer
Dim j As Integer
Dim tmpDemData As String
filenum = FreeFile
Open strSourceFile For Binary As #filenum
fileContents = Space(LOF(filenum))
Get #filenum, , fileContents
Close filenum
fileInfo = Split(fileContents, vbCrLf)
´取出源文件行数,按照回车换行来分隔成数组
filenum = FreeFile
tmpDemData = ""
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile
End If
Dim Filestr() As String
Open strTargetFile For Append As #filenum
´循环每一行
For i = 0 To UBound(fileInfo) - 1
Filestr = Split(Trim(fileInfo(i)), ",") ´按照逗号分隔每一行的数据
tmpDemData = ""
For j = 0 To UBound(Filestr)
´判断是否为奇数位
If (j Mod 2) = 0 Then
tmpDemData = tmpDemData & Filestr(j)
ElseIf j <> 0 And j <> UBound(Filestr) Then
tmpDemData = tmpDemData & ","
End If
Next
´保存一行如目标文件
Print #filenum, tmpDemData
Next
Close #filenum
MsgBox "完毕"
End Sub
Private Sub Command1_Click()
提取奇数位数据 "d:\aa.txt", "d:\bb.txt"
End Sub
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