mr_avril
asked on
How i'm gonna extract data from text logfile into VB?
Hi experts,
i have this kind of text logfile..
12/12/2003 09.01am 50mV
12/12/2002 09.02am 65mV
12/12/2003 09.03am 72mV
it have 3 columns (date, time , temp). Between date and time, time and temp.. they are seperated with one tab.
How i goona take data in each column at every line? meaning that, at first line, i want to take date, time and temp.
For date and time, i can take the whole string (12/12/2003, 09.01am) because it is not a value. For temp, i need the value to substitute into my formula in VB. so i need to seperate mV from the integer so that it would become a valid value. If that is difficult, how about i want to seperate this .. 50 mV <-- it has one white space between integer and unit. Can it be done?
Please help me..
thanks
i have this kind of text logfile..
12/12/2003 09.01am 50mV
12/12/2002 09.02am 65mV
12/12/2003 09.03am 72mV
it have 3 columns (date, time , temp). Between date and time, time and temp.. they are seperated with one tab.
How i goona take data in each column at every line? meaning that, at first line, i want to take date, time and temp.
For date and time, i can take the whole string (12/12/2003, 09.01am) because it is not a value. For temp, i need the value to substitute into my formula in VB. so i need to seperate mV from the integer so that it would become a valid value. If that is difficult, how about i want to seperate this .. 50 mV <-- it has one white space between integer and unit. Can it be done?
Please help me..
thanks
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sorry anv.. i'm very new to VB.. i don't understand what u means..
and idle_mind.. great coding.. but i cannot run it.. it give error..
and idle_mind.. great coding.. but i cannot run it.. it give error..
What was the error?
Hi mr_avril,
This code will read in file into a buffer and read one line at a time.Then it will oarse the line to find
your mV value.
Private Sub Parsing_to_New()
Dim sRecord As String
Dim sParse As String
Dim sBuffer As String
Dim iReadfile As Integer
Dim iMyValue As Integer
'Open and read old file
iReadfile = FreeFile
Open "c:\YourFile.TXT" For Input As #iReadfile
Do Until EOF(iReadfile)
'******** read file into a buffer string ******************
Select Case LOF(iReadfile) - Seek(iReadfile)
Case 0
If sParse = "" Then
Exit Do
End If
If InStr(sParse, vbLf) = 0 Then
Exit Do
End If
'This size is for a 1.44 Disc
Case Is >= 142000
sBuffer = Input(LOF(iReadfile) - Seek(iReadfile) + 1, iReadfile)
sParse = sParse & sBuffer
Case Is < 142000
On Error Resume Next
sBuffer = Input(LOF(iReadfile) - Seek(iReadfile) + 1, iReadfile)
sParse = sParse & sBuffer
End Select
'*********** read string **************************
While InStr(sParse, vbLf) '<----- Read one line at a time
sRecord = Left(sParse, InStr(sParse, vbLf) - 1) '<--- This will show you each line
sParse = Mid(sParse, InStr(sParse, vbLf) + 1) '<--- This will show you the whole file
Debug.Print sRecord '<---- Add to VB Watch to see how it works
Debug.Print sParse '<---- Add to VB Watch to see how it works
If InStr(sRecord, "mV") Then
iMyValue = Mid(sRecord, InStr(sRecord, "mV") - 2, 2)
End If
Print #iOutfile, sRecord
Wend
Loop
Close #iReadfile
End Sub
This code will read in file into a buffer and read one line at a time.Then it will oarse the line to find
your mV value.
Private Sub Parsing_to_New()
Dim sRecord As String
Dim sParse As String
Dim sBuffer As String
Dim iReadfile As Integer
Dim iMyValue As Integer
'Open and read old file
iReadfile = FreeFile
Open "c:\YourFile.TXT" For Input As #iReadfile
Do Until EOF(iReadfile)
'******** read file into a buffer string ******************
Select Case LOF(iReadfile) - Seek(iReadfile)
Case 0
If sParse = "" Then
Exit Do
End If
If InStr(sParse, vbLf) = 0 Then
Exit Do
End If
'This size is for a 1.44 Disc
Case Is >= 142000
sBuffer = Input(LOF(iReadfile) - Seek(iReadfile) + 1, iReadfile)
sParse = sParse & sBuffer
Case Is < 142000
On Error Resume Next
sBuffer = Input(LOF(iReadfile) - Seek(iReadfile) + 1, iReadfile)
sParse = sParse & sBuffer
End Select
'*********** read string **************************
While InStr(sParse, vbLf) '<----- Read one line at a time
sRecord = Left(sParse, InStr(sParse, vbLf) - 1) '<--- This will show you each line
sParse = Mid(sParse, InStr(sParse, vbLf) + 1) '<--- This will show you the whole file
Debug.Print sRecord '<---- Add to VB Watch to see how it works
Debug.Print sParse '<---- Add to VB Watch to see how it works
If InStr(sRecord, "mV") Then
iMyValue = Mid(sRecord, InStr(sRecord, "mV") - 2, 2)
End If
Print #iOutfile, sRecord
Wend
Loop
Close #iReadfile
End Sub
I for got to remove line....
Print #iOutfile, sRecord
from the example code...
Please remove that line for the code to run without errors.
Print #iOutfile, sRecord
from the example code...
Please remove that line for the code to run without errors.
'wud be easy to use..
Set rsTxt = New ADODB.Recordset
'fpath is the full path of the text file you want to open
'cn a connection object
cn.Open "Provider=Microsoft.Jet" _
& ".OLEDB.4.0;Data Source=" & fpath _
& ";Extended Properties='text;HDR=NO;" _
& "FMT=Delimited'"
'fname is the Name of the text file to open
rsTxt.Open "select * from [" & fName & "#txt]", cn, adOpenStatic, _
adLockReadOnly, adCmdText
'now use the recordset to fetch data from the file
'as u use 4 DBMS..