The code below reads each line from a file and if the conditions become true it adds the contents of the file from the particular line and after into a string collection (i.e. the All contents). This is what at least what the code should do as the current one only adds the line that it encounters into the string collection.
View 5 RepliesI have a "Form" with:
1- List Box
1- TextBox
3- Button
1- OpenFileDialog
1- SaveFileDialog
I want that clicking the btn1 it shows the OpenFileDialog and read file that it has got this structure: SKI10 1 71 0 0 18 101 19 0 29 101 30 0 40 101 41 0 50 101 51 0 62 101 63 0 81 101 82 0 95 101 2 0 0 95 165 3 0 1072 01 4 2 1 93 15
I want that it reads all Line of the File and it add an Item in ListBox for line.For example the first Item of the ListBox in this case is
SKI1
And the 2th Item is in this case.
0 1 7
I want using the StreamReader classes.And i want that when i click an Item of the ListBox it shows the Text in the TextBox and I can edit the Line and that clicking antoher button the Item will come updated with new Text of the TextBox.I have also another button for saving the Mod.I can use the AppendText and it create a new file writing ListBox1.Items line for line.
If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then Dim file_esistenteD As StreamWriter[code].....
I'm having trouble with reading a .txt file line by line, converting it into a string, then putting it into a listbox. When I execute I get an error saying "IndexOutOfRangeException was unhandled" Here is my
[Code]...
I like search a file TXT with this contains:
Name "Paul"
Age "11"
City "Chicago"
my question is: Its possible get a string "Name" and give me the value "Paul"? I have this function for get strings:
[code]...
I need to read a xls/xlsx/ods/txt file line by line,to get a column name of file .how to read a file line by line in vb.net?
View 1 RepliesI have a hardware which sends out packets containing 17 bytes to the comport in bursts of 3. the little test VB that I have written receives and displays the bytes in a line of 17 bytes long and works fine until it gets to around 170th packet, then it starts to mix up (looks like shifting the data left) the bytes shift mostly by one digit sometimes by two. then it will continue to give almost a packet correct and a packet shifted for about 50 packets. Then it will correct itself for a long while, but then the speed at which it receives drops. All the packets are sent 3 times, and before things go wrong (within the first 170 packets) the packet counter shows that it receives 3 packet each time but after the problem it goes to 2 packet per burst and then to one.
If i close my VB monitoring program say at packet 165 and immediately open it again, it wont go wrong for another 170 packets, this points the finger at VB. I have check my hardware, there is no problem with that.The program reads port - waits for 17 bytes - once 17 has been received it will go and buffer the packet in an array. In fact they are 2 arrays but printing fro either results in the same problem.I have tried whatever i could think of but to no avail, i am wondering if some kind of house keeping needs to be done to clear something... I am sorry the program is a bit messy but I have been making many changes to find out what the problem is - my code below:[code]
Notice that some files use vbnewline, some use unicode encoding, and so on and so on.
View 1 RepliesI would like to query a string that only reads a last character.
sqlstmt = "select * from table where Area like'%A'"
Dim cmd4 As New SqlCommand(sqlstmt, con2)
da = New SqlDataAdapter(cmd4)
ds = New DataSet
[code].....
I have the above codes but i've got '-1' if nothing to read..
I am working on a project that involes reading an Excel file, picking through it, then creating a flat CSV file. One of the the data elements I am picking up is a 9 character string that may be numeric, or contain one or more alpha chatacters. Excel has a nasty habit of converting long numerics to scientific notaion. I can overcome this by converting the "general" string to "TEXT".
However, there is one instance where I can not get the function to work...the string is "90333E108" ( the CUSIP for USU). Regardless, the text string is saved properly into the CSV file. When opened in a text editor, it reads correctly.
When opened with Excel, it is in scientific notation. Changing the field to "text" from "scientific" still displays "9.03E+112".
how to create an csv file that Excel will open and read correctly?
You can test this by creating an Excel workbook, format all cells as TEXT and add the following data:
90333E108
123
2
[Code]....
I am trying to update someonelse code, the attached code reads from a unicode txt files and compares a string of "Department_Name |Division_Name|Position_Name|Job_Name" with a db field called "ident_org" in org tbl. Since it is a bad design, I need the code to check a combination of ""Department_Code|Division_Name|Job_Code" against db and get the value of uid_org (unique key). Then if key exists then update that specific row(s) else insert the combination of "Department_Name|Division_Name|Position_Name|Job_Name" into db.[code]....
View 3 RepliesI have a function to check if a file is open:
Public Shared Function IsFileOpen(ByVal fileItem As String, ByRef bFileStatus As Boolean) As Boolean
Try
[Code]....
I need to check whether a file is open so that an alert can be put on screen for the user to close it before continuing to the next stage of the application.
But when I test the function with a file open, the error is not being caught.
If i have a line in a txt document "text.txt".Now what i want to do is open the file and read the contents.
When it find this "search.selectedEngine" term then it should delete that particular line and replace it with another string ("REPLACED STRING").
im using an array to retreive a string from a line in a txt file this is great the first time round but when i try to use the process again to update the textbox is doesnt work do i have to purge the array or some thing? im using the same script just mapping back to it so nothings changed ive tried using a second array with the same commands but different declared names and that doesnt work either Dim lines As String() = IO.File.ReadAllLines("C:myfile.txt")
Dim line2 As String = lines(2) textbox1.Text = line2
I thought you could use a structure as a container. I have line_1 with a line of data read in from a file. I only want to Look in position 1 of the line and position 8 for 9 and position 31 for 11. If I create a line_2 with the parts broken out for pieces that I want to look at then I could use a with statement right?
[Code]...
I use the following command to save my textbox strings to the file:
Sub SaveToolStripMenuItemClick(sender As Object, e As EventArgs)
FileOpen(1,"test.TXT", OpenMode.Output) ' Open file for output.
WriteLine(1, textBox_name.Text) ' Print text to file.
WriteLine(1, textBox_middlename.Text)
[Code].....
I've been trying to fix this problem for days, but I haven't been able to successfully apply any of the code that I've found to my project the way it is right now. Maybe I'll need to change the way it reads the file altogether.
Anyway, I'm trying to read through a text file line by line, reading each line into its own string.
I'm writing a small tool that requires me to take a string as input, search it in a txt file & return the whole line on which the string occurs,..for eg. let's say my text file has line # 5 as : "TEMP-This is a test line" now if i give "TEMP" or "test" as input is want my code to chk evry line in the text file & return the entire line where the string is found...
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim FileName, FindStr As String
Dim objReader As New StreamReader("c:MyFile.txt")
[code]....
I've got an application that reads a XML file via a stream reader. The problem is I can't edit my XML file and save it when others are using the application that is using the XML file at the time. how can i get around this?
View 1 RepliesI need to create an application that reads numbers from a file. it then should display the total of the numbers, display the average of the numbers, display the highest number in the file and display the lowest number in the file. We are using visual basic 2008. I am new to this and stuck . How do I begin. I included the number set that we are supposed to read from.
Attached File(s) NumberSet.txt (990bytes)Number of downloads: 80
I am trying to write a basic .net program that reads from one file with streamreader, scans each line for specific errors in formating and if the errors exist correct them in an output to another file that I've just renamed as same file name.cache.
View 2 RepliesDeleting a line from a text file. This is for an ASP.net Webpage. I will have a file called Sources.txt. Example data of this file looks like this[cde]...
View 8 Repliesi want to get the line number of a text file that contains a particular string data.
1. using the string data like str="book"
2. find if the string is part of the file
3. get the line numbers of where it occurs.
eg
filename=sample.txt
sample.txt contains
dance
book
[Code]...
I am trying to convert each line in a file into a byte array. The line in the file is similar to this:
:100000000247A1E59620E7FBE4F596900780E0FF24
I have code and have tried several things but they don't seem to be working out.
Dim fileline As String = ""
Dim linebytes() As Byte = Nothing
Dim idx As Integer
' Make sure the file is open for transferring the data to the board.
If Not (SoftwareUpdateFilestream Is Nothing) Then
[Code] .....
I would like to know how to read from text file that have a line with string A and ignore lines with string B.
View 7 RepliesI'm trying to create a program which reads a text file into an array.
[Code]...
But that's just silly so how can I fix this? Lines isn't being assigned a null value it's being assigned the first line of text in the file which has text in it so I'm confused.
Im trying to use a Settings file that the program opens and reads the info from when it loads BUT when the user chooses a custom color (ex: ff5f67d6) How can i assign the form background color to that color code?
Dim BgColor As Color = ColorTranslator.FromHtml(Settings(0))
Me.BackColor = BgColor
Settings(0) = the color code
that is the code i tried to use that doesn't work
I have to make a program that reads a txt file after reading it, show it in a richtext box and in another tab make the average of the grades the input received sort it by the student id and then in the same rtb sort it by the average of their grades, and finally save it on a new text file.
The text file input is something like this
12 3 10.0 6.9 7.3
19 2 6.7 9.3
10 3 4.5 9.3 4.5
[Code]...
As you noticed in the input the first number is the student ID, the second number is the number of tests made by the student, and the other 3 numbers are grades, in the output the first number is the student ID, the second number is the average of the tests, and the other 3 numbers are grades, I don't have a problem opening and saving a text file and neither creating a tab with 2 RTB , my problem is how do I tokenize or read the input line by line, i guess that i need to use the split function but I don't know how to implement it into the program.
My mailbox regularly gets emails from people wanting to promote their events. Usually the subject line looks like this:
fwd: come to *TMC* meeting this weekend, <5/19/2012 @ 1300 >
I need a script to read the date, then make an appointment on my outlook calendar, using that date, time and term (TMC) as the meeting title. So it should make an appointment on 5/19/2012 at 1pm, called "TMC meeting"All appointments are 2 hours by default.I used The identifiers "*" and "<>" as an example, and can be changed to be whatever, what is important is that the meeting gets on my calendar with the correct title.
We're converting a Classic ASP site to an ASP.NET site. One function was to upload a 'template' of data in CSV format for importing into the database. There were several different record types in there (the first field always indentifies the type of data).The task was to get the CSV into a DataTable so it could be validated (new project is to have MUCH better validation rules)
The code seemed pretty straightforward - watered down (taking out comments, Try/Catch, etc) it is as follows:
Dim da As New System.Data.OleDb.OleDbDataAdapter
Dim cn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strDirectory & ";" & "Extended Properties=""Text;HDR=No;FMT=Delimited;""")
[code]....
The DataTable (dtData) is populated, but only starting with the second line of the CSV file DESPITE the fact that "HDR=No" is in the connection string.
I have a text file (CSV) approx 100k lines (8Mb). I want to search the entire file for a particular string eg, "apple" and for all lines containing the string to be printed in a text box. have successfully done this using streamReader to parse the CSV and check each element against the search word eg. apple. This has proven to be very very slow and I have read that the "ReadAllLines" method is much faster.
View 8 Replies