怎么样在VB中删除、替换或者插入内容到文本中某一行及行列?
怎么样在VB中删除、替换或者插入内容到文本中某一行及行列?
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