如果文本文件已经存在,则将文本附加到文本文件 [英] Append text to text file if it already exists
本文介绍了如果文本文件已经存在,则将文本附加到文本文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个正在运行的脚本,用于替换固定宽度文件中的某些字符(从第 2 行开始).
I have a script which is working, to replace some characters in a fixed width file (starting from row 2 onward).
如果目标文件已经存在,希望避免覆盖它.相反,如果它存在,则将行(从源文件的第 2 行开始)附加到目标文件的末尾.我正在努力寻找一个带有适当建议的线程.这是当前代码:
What want to avoid overwriting the target file if it already exists. Instead, if it exists, to append the rows (from row 2 onwards of the source file) to the end of the target file. I am struggling to find a thread with a proper suggestion. This is the current code:
Dim objFSO
dim objFile
dim thisLine
Set objFSO = CreateObject("Scripting.FileSystemObject")
If (objFSO.FileExists("C:\Users\Dimitar\Desktop\BPSDRC\PAYBOTH.dat")) Then
Set objFile = objFSO.GetFile("C:\Users\Dimitar\Desktop\BPSDRC\PAYBOTH.dat")
Else
WScript.Quit()
End If
If objFile.Size > 0 Then 'make sure the input file is not empty
Set inputFile = objFSO.OpenTextFile("C:\Users\Dimitar\Desktop\BPSDRC\PAYBOTH.dat", 1) 'Replace the filename here
set outputFile = objFSO.CreateTextFile("C:\Users\Dimitar\Desktop\BPSDRC\PAYIMP.dat", TRUE) 'replace it with output filename
' first line - leave it as it is
thisLine = inputFile.ReadLine
newLine = thisLine
outputFile.WriteLine newLine
'all remaining lines - read them and replace the middle part with 18 zeroes
do while not inputFile.AtEndOfStream
thisLine = inputFile.ReadLine ' Read an entire line into a string.
'the zeroes are to fix issue N1 (payment in other amt)
'the CDF are to fix issue N2 (payment in local amt)
newLine = mid(thisLine,1,47) & "000000000000000000" & mid(thisLine,66,121) & "CDF" & mid(thisLine,190)
outputFile.WriteLine newLine
loop
inputFile.Close
outputFile.Close
objFSO.DeleteFile "C:\Users\Dimitar\Desktop\BPSDRC\PAYBOTH.dat"
end if
推荐答案
打开文件进行追加
Option Explicit
Const ForReading = 1, ForAppending = 8
Dim inputFileName, outputFileName
inputFileName = "C:\Users\Dimitar\Desktop\BPSDRC\PAYBOTH.dat"
outputFileName = "C:\Users\Dimitar\Desktop\BPSDRC\PAYIMP.dat"
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
If Not fso.FileExists( inputFileName ) Then
WScript.Quit
End If
If fso.GetFile( inputFileName ).Size < 1 Then
WScript.Quit
End If
Dim newFile, inputFile, outputFile
newFile = Not fso.FileExists( outputFileName )
Set inputFile = fso.OpenTextFile( inputFileName, ForReading )
Set outputFile = fso.OpenTextFile( outputFileName, ForAppending, True )
Dim lineBuffer
lineBuffer = inputFile.ReadLine()
If newFile Then
outputFile.WriteLine lineBuffer
End If
Do While Not inputFile.AtEndOfStream
lineBuffer = inputFile.ReadLine
lineBuffer = mid(lineBuffer,1,47) & "000000000000000000" & mid(lineBuffer,66,121) & "CDF" & mid(lineBuffer,190)
outputFile.WriteLine lineBuffer
Loop
inputFile.Close
outputFile.Close
fso.DeleteFile inputFileName
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