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Several things wrong with your post:
0: this is the VB.NET forum, your question is about webdevelopment so go to the ASP.NET forum : Correct forum[^] and ask there again
1: every question here is urgent, the people answering however don't get payed so you'll get an answer whenever you get it.
2: from what I can understand from your question, what you are trying to do isn't possible (as far as I know), but ask in the correct forum and people can make better suggestions
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Hello friends,
I want to copy a file from one folder to another.
I am using File object.copy to copy the file from one folder to another. How can i make sure that the copy is success or not?
Thanks and regards
Jishith
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If it succeeds, no exception will be thrown, and File.Exists(destination) will return true
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I have a text file that has similar lines..;
i want to count those similar lines and write it as 1 line with a new fieldname Quantity indicating the number of similar lines...
thanks in advance
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Import it in a database and do a SELECT DISTINCT 
I are troll
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When handling text files and doing actions on them I always find its best to read the whole text file line by line into a datatable or array or list. Do your actions you need to do on that datatable / array / list and then overwrite the file with a new one.
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i have not used datatable before...
i have no idea about it.
i searched google, but did not get anything useful to do...
any help to import text file into datatable will be mmore helpfull.
thanks for the previous reply and for the future replies...
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From memory :
dim dt as new datatable("a name")
dt.columns.add(new datacolumn("column1",getttype(string)))
dt.columns.add(new datacolumn("column2",getttype(string)))
dt.columns.add(new datacolumn("column3",getttype(string)))
dt.columns.add(new datacolumn("column4",getttype(string)))
...
'now that you have your datatable
'read your textfile line by line
do while not reader.eof
dim dr as datarow = dt.newrow
dr.item("column1")= "your value for that column here"
dr.item("column2")= "your value for that column here"
dr.item("column3")= "your value for that column here"
dr.item("column4")= "your value for that column here"
...
dt.rows.add(dr)
loop
'now you have your entire textfile in a datatable
'you can do all your actions on that datatable now and then overwrite your textfile with a new one
hope this helps
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what tool should i add from the toolbox to use this code???
is it a DataGridView or DataSet or something else.....
i feel like sitting in a dessert where there is nothing available...
my mind is completely blank.....
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If you don't want to display the file on a form you don't need a tool
This
dim dt as new datatable("tablename")
create's the datatable
This
dt.columns.add(new datacolumn("column1",gettype(string)))
Create's a column within that datatable with the name 'column1' and datatype 'string'
this
dim dr as datarow = dt.newrow
create's a new row in the datatable
this
dr.item("column1")= "value goes here"
puts 'value goes here' into this new row in the column 'column1'
so you do the code I send you urlier
while reading your textfile (you already have that code) you fill the datatable.
Every line in your textfile is a new row (dim dr as datarow = dt.newrow) in your datatable.
Every "column" in your textfile is a column in your datatable
Once you have done this you can easily go over the datatable and add / delete / alter rows
for each dr as datarow in dt.rows
if (some check)=true then
'do something here
...
else
'do something else here
...
end if
next
and as last action just run over your datatable again and for every row you write a line to your textfile
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vijay2482 wrote: Do While Not sa.ReadToEnd
That's where its going wrong. Readtoend returns a string. When doing a check with 'not' in it you need to have a boolean type.
For reading the text file you have to use the code you already had. (nothing changes there) but instead of trying to do your alterations (delete/new/alter) inside that loop you just put your data (from the textfile) in the correct column in the datatable.
Then after you'v read the text file, you can do all your alterations on the datatable.
(A datatable is basicly the same as a table in sql or access)
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You already wrote the code to read your text file and split every line in several parts (columns). You posted that a few post below.
Use that code but instead off altering your text you add the specific text to the correct column in the datatable.
After that you can start with doing your checks / alterations.
You have all the code you need to do this in front off you, you just need to put it together.
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First off all this:
vijay2482 wrote: Dim dt As New DataTable("TextFile")
dt.Columns.Add(New DataColumn("column1", GetType(String)))
dt.Columns.Add(New DataColumn("column2", GetType(String)))
dt.Columns.Add(New DataColumn("column3", GetType(String)))
dt.Columns.Add(New DataColumn("column4", GetType(String)))
dt.Columns.Add(New DataColumn("column5", GetType(String)))
dt.Columns.Add(New DataColumn("column6", GetType(String)))
dt.Columns.Add(New DataColumn("column7", GetType(String)))
dt.Columns.Add(New DataColumn("column8", GetType(String)))
dt.Columns.Add(New DataColumn("column9", GetType(String)))
dt.Columns.Add(New DataColumn("column10", GetType(String)))
Has to go outside off your loop so before:
vijay2482 wrote: While sa.Peek() >= 0
the way you do it now you'll end up with only 1 line, since you recreate the datatable every new line
Second you haven't changed what I told you in last reply
vijay2482 wrote: Do While Not sa.ReadToEnd
This is giving you the error, you can not do this.
This should be close to what you need, you might have to some changes but search a little bit.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim temp As String
Dim name As String
Dim comp As String
Dim desF As String
Dim desAF As String
Dim desA As String
Dim desAA As String
Dim ecn As String
Dim dnf As String
Dim repDNF As String
Dim repASM As String
Dim dt As New DataTable("TextFile")
dt.Columns.Add(New DataColumn("column1", GetType(String)))
dt.Columns.Add(New DataColumn("column2", GetType(String)))
dt.Columns.Add(New DataColumn("column3", GetType(String)))
dt.Columns.Add(New DataColumn("column4", GetType(String)))
dt.Columns.Add(New DataColumn("column5", GetType(String)))
dt.Columns.Add(New DataColumn("column6", GetType(String)))
dt.Columns.Add(New DataColumn("column7", GetType(String)))
dt.Columns.Add(New DataColumn("column8", GetType(String)))
dt.Columns.Add(New DataColumn("column9", GetType(String)))
dt.Columns.Add(New DataColumn("column10", GetType(String)))
'now that you have your datatable
'read your textfile line by line
Try
Using sw As StreamWriter = New StreamWriter("c:\DB\output222.txt")
Using sa As StreamReader = New StreamReader("c:\DB\01530501.txt")
temp = sa.ReadLine()
name = temp.Substring(0, 29)
comp = temp.Substring(30, 18)
desF = temp.Substring(49, 32)
desAF = temp.Substring(82, 38)
desA = temp.Substring(120, 35)
desAA = temp.Substring(156, 33)
ecn = temp.Substring(190, 10)
dnf = temp.Substring(201, 7)
repDNF = temp.Substring(208, 9)
repASM = temp.Substring(217, 8)
sw.WriteLine(name & comp & desF & desAF & desA & desAA & ecn & dnf & repDNF & repASM)
sw.WriteLine(sa.ReadLine())
While sa.Peek() >= 0
temp = sa.ReadLine()
dim dr as datarow = dt.newrow
dr.Item("column1") = temp.Substring(0, 29)
dr.Item("column2") = temp.Substring(30, 18)
dr.Item("column3") = temp.Substring(49, 32)
dr.Item("column4") = temp.Substring(82, 38)
dr.Item("column5") = temp.Substring(120, 35)
dr.Item("column6") = temp.Substring(156, 33)
dr.Item("column7") = temp.Substring(190, 10)
dr.Item("column8") = temp.Substring(201, 7)
dr.Item("column9") = temp.Substring(208, 9)
dr.Item("column10") = temp.Substring(217, 8)
'DO NOT DO THIS HERE
'sw.WriteLine()
End While
End Using
End Using
'go over your datatable
For Each dr As DataRow In dt.Rows
'do your alterations here
'warning you cannot do a delete row inside this loop so if you
'need to delete the row store it in a list (dim bla as new list(of datarow))
'and after this loop go over that list to delete the rows you don't need
Next
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
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vijay2482 wrote: what does this part of the code do?
that goes over every line in your datatable (so every line in your textfile)
You'll have to do some research into datatables
Here are a few methods from a datatable that you'll need:
0: datatable.select
1: datatable.Rows.remove
2: datatable.Rows.removeat
3: datatable.Rows.InsertAt
4: datatable.Rows.IndexOf
5: datatable.Rows(index).item("columnname")
These are just a few but should get you close to your desired end result.
Research them (use google), test them, and use them.
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thanks for that..
will comeback soon after going through datatable...
thanks for all ur help...
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You have more patience than I do, Tom!
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Well it was a slow day at work yesterday, and I was in a good mood (unfortunately that has changed to a bad mood today)so...
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i have similar problem of yours, reading txt file.
what i did is i import first the text file to database using Microsoft Text Driver
then thats the time u can have a query string. u use StreamWriter and its a very long process.
try this:
Dim constring as string = "Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=" & c:\DB\output222.txt & "\;Extensions=asc,csv,tab,txt;"
ssql = "SELECT yourField FROM yourTexFile
txtcon= New ADODB.Connection
txtcon.ConnectionString = constring
txtcon.CursorLocation = ADODB.CursorLocationEnum.adUseClient
txtcon.Open()
C# コードMicrosoft End User
2000-2008
「「「「「「「「「「「「「「「「「「「「「「「「「「「「
The best things in life are free
」」」」」」」」」」」」」」」」」」」」」」」」」」」」
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i have similar problem of yours, reading txt file.
what i did is i import first the text file to database using Microsoft Text Driver
then thats the time u can have a query string. u use StreamWriter and its a very long process.
try this:
Dim constring as string = "Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=" &c:\DB\output222.txt & "\;Extensions=asc,csv,tab,txt;"
ssql = "SELECT yourField FROM yourTexFile
txtcon= New ADODB.Connection
txtcon.ConnectionString = constring
txtcon.CursorLocation = ADODB.CursorLocationEnum.adUseClient
txtcon.Open()
C# コードMicrosoft End User
2000-2008
「「「「「「「「「「「「「「「「「「「「「「「「「「「「
The best things in life are free
」」」」」」」」」」」」」」」」」」」」」」」」」」」」
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thanks for that code...
but i cannot use Ms Access for my development...
anyways will definitly give it a try..
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