VB操作文本文件的方法很多,下面的例子是我自己作項(xiàng)目或者回答網(wǎng)友提問時(shí)做的,很有代表性,希望能夠給各位朋友一些啟發(fā).
'功能:刪除、替換文本中一行,或者插入內(nèi)容到文本中某一行
'作者: soho_andy (冰)
'參數(shù):
'strSourceFile 原始文件完整名
'strTargetFile 生成新文件的完整名
'intRow 操作的行數(shù)
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)
'取出源文件行數(shù),按照回車換行來分隔成數(shù)組
filenum = FreeFile
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile
End If
Dim Filestr() As String
'刪除一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i <> intRow - 1 Then
Print #filenum, fileInfo(i)
End If
Next
Close #filenum
'替換一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要替換進(jìn)去的內(nèi)容"
End If
Next
Close #filenum
'插入一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要插入到這行的內(nèi)容"
Print #filenum, fileInfo(i) '保留原來的行,位置后移一位
End If
Next
Close #filenum
MsgBox "完畢"
End Sub
'另外一個(gè)解決實(shí)際問題的例子
'
'網(wǎng)友的要求
'設(shè)有文件a.txt,其中存放了兩行數(shù)據(jù),數(shù)據(jù)用逗號分隔,現(xiàn)在要讀取第一行的奇數(shù)位置的數(shù)據(jù)寫 入到另一個(gè)文本文件(b.txt)的第一行,類似地,把第二行的奇數(shù)位置的數(shù)據(jù)寫入到第二行。
'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應(yīng)為
'1,3,5
'6,8,10
'作者: soho_andy (冰)
'參數(shù):
'strSourceFile 原始文件完整名
'strTargetFile 生成新文件的完整名
Sub 提取奇數(shù)位數(shù)據(jù)(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)
'取出源文件行數(shù),按照回車換行來分隔成數(shù)組
filenum = FreeFile
tmpDemData = ""
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile End If
Dim Filestr() As String
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
Filestr = Split(Trim(fileInfo(i)), ",") '按照逗號分隔每一行的數(shù)據(jù)
tmpDemData = ""
For j = 0 To UBound(Filestr)
'判斷是否為奇數(shù)位
If (j Mod 2) = 0 Then
tmpDemData = tmpDemData & Filestr(j)
ElseIf j <> 0 And j <> UBound(Filestr) Then
tmpDemData = tmpDemData & ","
End If
Next
'保存一行如目標(biāo)文件
Print #filenum, tmpDemData
Next
Close #filenum
MsgBox "完畢"
End Sub
Private Sub Command1_Click()
提取奇數(shù)位數(shù)據(jù) "d:\aa.txt", "d:\bb.txt"
End Sub
'功能:刪除、替換文本中一行,或者插入內(nèi)容到文本中某一行
'作者: soho_andy (冰)
'參數(shù):
'strSourceFile 原始文件完整名
'strTargetFile 生成新文件的完整名
'intRow 操作的行數(shù)
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)
'取出源文件行數(shù),按照回車換行來分隔成數(shù)組
filenum = FreeFile
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile
End If
Dim Filestr() As String
'刪除一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i <> intRow - 1 Then
Print #filenum, fileInfo(i)
End If
Next
Close #filenum
'替換一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要替換進(jìn)去的內(nèi)容"
End If
Next
Close #filenum
'插入一行代碼塊
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
If i = intRow - 1 Then
Print #filenum, "你要插入到這行的內(nèi)容"
Print #filenum, fileInfo(i) '保留原來的行,位置后移一位
End If
Next
Close #filenum
MsgBox "完畢"
End Sub
'另外一個(gè)解決實(shí)際問題的例子
'
'網(wǎng)友的要求
'設(shè)有文件a.txt,其中存放了兩行數(shù)據(jù),數(shù)據(jù)用逗號分隔,現(xiàn)在要讀取第一行的奇數(shù)位置的數(shù)據(jù)寫 入到另一個(gè)文本文件(b.txt)的第一行,類似地,把第二行的奇數(shù)位置的數(shù)據(jù)寫入到第二行。
'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應(yīng)為
'1,3,5
'6,8,10
'作者: soho_andy (冰)
'參數(shù):
'strSourceFile 原始文件完整名
'strTargetFile 生成新文件的完整名
Sub 提取奇數(shù)位數(shù)據(jù)(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)
'取出源文件行數(shù),按照回車換行來分隔成數(shù)組
filenum = FreeFile
tmpDemData = ""
If Dir(strTargetFile, vbNormal) <> "" Then
Kill strTargetFile End If
Dim Filestr() As String
Open strTargetFile For Append As #filenum
'循環(huán)每一行
For i = 0 To UBound(fileInfo) - 1
Filestr = Split(Trim(fileInfo(i)), ",") '按照逗號分隔每一行的數(shù)據(jù)
tmpDemData = ""
For j = 0 To UBound(Filestr)
'判斷是否為奇數(shù)位
If (j Mod 2) = 0 Then
tmpDemData = tmpDemData & Filestr(j)
ElseIf j <> 0 And j <> UBound(Filestr) Then
tmpDemData = tmpDemData & ","
End If
Next
'保存一行如目標(biāo)文件
Print #filenum, tmpDemData
Next
Close #filenum
MsgBox "完畢"
End Sub
Private Sub Command1_Click()
提取奇數(shù)位數(shù)據(jù) "d:\aa.txt", "d:\bb.txt"
End Sub