VS 2008 Read Csv File Into Dgv - Text Versus Numeric Values?
Oct 13, 2010
I read a csv file into my .net program using ado.net and display it in a datagridview.In the file I have two rows. The first column is a component id, and it is supposed to be numeric. But the user can edit the csv file before having my program load it, and accidentally put text there. That is something I want to edit when he presses a button to add the data to the database. So let's say he puts a value of A in the first record and a value of 1 in the second record. Or vice versa. What is displayed in the dgv is a blank in the first record and a 1 in the second, or 1 in first and blank in second. If both csv records are A, then what is displayed in the dgv is an A in both the first and second records. I don't understand what is happening. The fact that there sometimes is a numeric in the column makes it think it is a numeric field and therefore only display numerics and blank otherwise, and the fact that there's always text in the column makes the code know it is a text field?
View 2 Replies
ADVERTISEMENT
Sep 25, 2009
I am trying to read data with a test routine from a fairly simple 3rd party Excel file. The file has three sheets and was created by Open Office 3.x as an 'Excel 97/2000/XP .xls' file. The later, still to be programmed, application must later run on machines with Windows XP Professional using the 2.0 .net framework and no Office package installed. The content of the file does not need to be modified by the later application. For some reason, numeric values are not read correctly. They "convert" to DBNull. I've searched around a bit but not found a 'simple' solution for solving this problem. Adding 'IMEX=1' or 'HDR=Yes;IMEX=1' to the connection string results in an error 'Installierbares ISAM nicht gefunden' (installable ISAM not found).
Based on various examples I've found, I've written the following test code:
Option Strict On
Option Explicit On
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code] .....
View 2 Replies
Dec 4, 2010
I only want to place the numerical data in an array. At the moment I have the following code to do this. [Code]. This code places the numbers in the data array when there is not any text in the file, i.e. when there are no headers. I would like to place the headers in another array, and then have the numbers in the array as in the code above.
View 5 Replies
Dec 30, 2010
How would I go about reading a textfile, finding values and using the values in the program?Now I want the program to read the text file, find [1], use the first line after [1] as value for a variable, and the second line as value for another variable. After that I will run some code with the values and then do the same thing again for [2] etc.
View 2 Replies
Aug 22, 2009
Before I start great forums, from what i've seen browsing unregistered this place is a treasure trove of information; however, after searching for what I need I could only find threads that seemed way to complicated or irrelevant, so...Essentialy I have created a program in which values entered are saved to seperate text files depending on which tab of a Tab Control they originate (from text boxes). I'm pretty new to VB but i managed to save the values of each text box to a .txt as CSV, essentialy all values will only ever be decimals (as currency) or dates. Example code for one of the .txt's:
My.Computer.FileSystem.WriteAllText("C:UsersAndyDocuments
ResourcesTermInformation.txt", Me.tbTIAutTermWeeks.Text & ","
& Me.tbTISprTermWeeks.Text & "," & Me.tbTISumTermWeeks.Text &
[code].....
View 6 Replies
Jan 4, 2010
I have one combobox, two buttons (Add and View) and listbox. When I click button Add text from combobox is added to text file. This is code for Add button:
[Code]...
View 7 Replies
Sep 5, 2009
I'm having problem reading Binary file that has two types of data in it; Strings and numeric data in decimal format.[code]...
1. The loop doesn't stop, and it gives me "Unable to read beyond the end of the stream" Error..
2. The output isn't accurate, apart from a few random correct strings and numbers..
3. After the loop is fixed, how can i save the data to an Array or write it to a text file?. Can the be saved line by line so that the output file has the same number of lines?
4. As you can see in the code, I've tried writing data in a file, but it doesn't work.. Messagebox does show some data (even though it's not accurate), the file however doesn't contain any data..
View 14 Replies
Jan 27, 2012
I�m using VB.Net 2008 application program.I�m using DataGridView, where column types DataGridViewTextBoxColumn. I have 3 fields. 1 field values are numeric, 1 field values are string and 1 field values are decimal.
When I try to sort the string value column, it sorts correctly. But when i try to sort the numeric value column, it sorts as if its string value.
View 3 Replies
Jan 27, 2012
I�m using VB.Net 2008 application program.I�m using DataGridView, where column types DataGridViewTextBoxColumn. I have 3 fields. 1 field values are numeric, 1 field values are string and 1 field values are decimal.When I try to sort the string value column, it sorts correctly. But when i try to sort the numeric value column, it sorts as if its string value.I searched a lot to make it sort numerically. But I couldn�t find it.
View 1 Replies
Sep 28, 2011
I am using Visual Studio 2008 on Windows XP SP3. User has Windows 7 Pro (32 bit). The IO code below works for me. The read code works for user, but the write code only works for new files. If the user tries to overwrite a current data file, then no data is written to disk. I have done all the usual IO checking (valid file name, etc.) and have excluded it from my same code. In my app, FileSave and FileSaveAs both call WriteDataFile(FullFileName). Any reasons why FIleSave would work on Windows XP, but not on Windows 7 Pro (32 bit)?
Code:
Public Function ReadDataFile(ByVal FullFileName As String) As Integer
' reads a Data file from disk
'
' Format is a text file, with [TAB] seperators and [CR][LF] as line terminators
[code]...
View 8 Replies
Aug 5, 2010
i am working on read line by line . At each line that my app read , i added a event . How do i read a text file till the end and Stop it? there is how it work :
[Code]...
View 5 Replies
Mar 23, 2009
I have a DEM file(Digital Elevattion Model File) and I am trying to open the file,where we have Latitude and Longitude values inside the DEM file.And, Now I have opened the file using Filestream and Read the file using BinaryReader.But, I am having a trobule in getting the values of Latitude and Longitude.I am getting Byte values randomly as 1,202,31,271 etc.But, we dont have latitude and longitude values more than 180,and also I am not getting 16 bit UInt values.For example, the values should be like Latitude 20.00416666666667 and Longitude 39.99583333333333.So,read the correct Byte values of the DEM file.The code I have used till now is:
Dim fs As FileStream = New FileStream("C:UsersadminDesktopHeader and DEM fileE020N40.DEM", FileMode.Open, FileAccess.Read)
Dim rd As New BinaryReader(fs)
Dim convertDB As UInt16
For i = 0 To rd.BaseStream.Length
[code]....
View 14 Replies
Apr 6, 2012
Is there a numeric text box, not an up-down box, a SIMPLE numeric box into which the user can place a number, 5 boxes actually, then on command have the five boxes added and the sum displayed?
View 8 Replies
May 26, 2008
how to do this for vb6 however i am using vb 2008 and the code for vb6 does not seem to work.
I have designed a form with a text box on it, and a command button underneath. The idea is to run this as a sort of stiky notes section.
I want the text box to read rich text into the textbox (C:\\stickynotes.rtf")
Then i have a command button underneath which i want to save the content of the rich text box to the rtf file (C:\\stickynotes.rtf). This is so that the user can edit and ammend information.
here is some code i have so far
Dim fileReader As System.IO.StreamReader
fileReader = My.Computer.FileSystem.OpenTextFileReader("C:\\stickynotes.rtf")
View 5 Replies
Jun 24, 2010
im trying to have the user press a button and a window pops up to select a file. then it reads the file and puts it in a text box. how could i do this?
View 1 Replies
Jul 2, 2009
I am learning Visual Basic and I have learned alot of it from the learning section included in Visual Basic Express Edition 2008 but I don't think I have learned alot. I am actually trying to make an extractor and importer for a game. I have the file called Frontened.MNG and I want to make a program that can open the file. Someone else had made the rxtractor but he doesn't have it now. The Frontened.MNG file contains bunch of .DDS files and I want to view them in the program and then be able to replace the .DDS files in the >MNG file and be able to Extract the files out of the .MNG file. I don't just want anyone to do it for me but teach me how to do it step by step. First I want to know is how to view the .MNG file in VB? It should be viewed in a listbox but I don't know how to read this file in VB. I know how to read a text file but I think this is a binary file and it is viewed differently.
View 6 Replies
Dec 13, 2009
I want my program to read certain text in a text file. For example if I have a text file that contains the following info..
acc=blah
pass=hello
I want my vb.net application to get that the account variable is equal to blah, and the password variable is equal to hello.
View 7 Replies
Jul 16, 2009
I had a .chm file I used in VB2008 and I'm having trouble getting it to work for VB2010. I use the code below to reference the file.
vb
Module HTMPHelpAPI Public Const HH_DISPLAY_TOPIC As Short = &H0 Public Const HH_DISPLAY_TOC As Short = &H1 Public Const HH_DISPLAY_INDEX As Short = &H2 Public Const HH_DISPLAY_SEARCH As Short = &H3 Public Const HH_HELP_CONTEXT As Short = &HF Declare Function HTMLHelp Lib "hhctrl.ocx" Alias "HtmlHelpA" (ByVal hwnd As IntPtr, ByVal lpHelpFile As String, ByVal uCommand As Int32, ByVal dwData As Int32) As Int32End Module
I then call it from my menu using this:
vb
Private Sub HelpToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles HelpToolStripMenuItem1.Click HTMLHelp(IntPtr.Zero, "PE Files Help.chm", HH_DISPLAY_TOC, 0) 'Dim sHelpFile As String 'Dim sStartupPath As String 'sStartupPath = Application.StartupPath.ToString 'sHelpFile = Replace(sStartupPath, "in", "hlp") & "PE Files Help.chm" 'Me.hlpHtmlLocal.HelpNamespace = sHelpFile End Sub
I had found the commented out portion online and tried to get it to work, but nothing will bring up the file. Do I need to have it loaded into VB.Net somehow or point to it or does it need to be in a certain location?
View 1 Replies
Mar 11, 2010
I'm not sure this is really the right place for this question but I couldn't find a general programming forum.Why are the numeric values -1 and 0 used to represent the logical values TRUE and FALSE?
View 6 Replies
Apr 27, 2012
I'm working on a program for a side business I run with a friend, who is a non-programmer.I've done a program before, using IO.StreamReader and IO.StreamWriter to read and write lines to a text file.
But now, I'm working on reading text data (it's output from an old legacy program) that reads a first and last name, and the customer number (6 digits) from one file.
Then, it uses the data (customer number) read the first time to cross reference the zip code and status from a second file, and display it.
The Data in the Text Files are as follows:[code...]
How would I begin parsing for the first and last name, and the customer number to assign to different variables?In the line that references names.txt I meant to put customers.txt.
That's a snippet of code I took from a previous program, so I know how to read the data, just don't know how to extract it.
View 4 Replies
May 8, 2009
is there a way to make VB 2008 read a text file of digits eg:
56154131313313
31231212121211
12534645456464
44564545454787
and import it into vb, splitting it into four digits and putting each set of four digits into a different text box.
View 5 Replies
May 9, 2010
I am trying to read/write a simple text file in net 2008 but can't, as yet, get it to work. This is how I use to do it in VB6
Code:
MyStr = App.Path & "DataData.txt"
Open MtyStr For Input As #1
[code]....
View 11 Replies
Jun 3, 2011
I ran across my first unicode data, and I am not sure what to do with it. I read the unicode text from a binary file using the ReadBytes method, because ReadChars threw an exception when it tried it. Well, long story short, I have found a way to work with the data, I can convert it using a small Function I wrote, which goes something like this: [Code] And this works wonderfully. It just throws away anything not in the ASCII range, including the BOM at the start of the unicode data.
But I would guess that this method is not very universal and probably not the best way. Are there any VB functions available to do this sort of thing? I was able to find something called Text.Encoding, but there didn't seem to be a reverse of that not that I found anyhow. Any ideas?
View 6 Replies
Mar 9, 2010
how can I do the followingRead line 1 from text.txt file (C: xt.txt) Wich Is URLthan Webbrowser1.navigate( Line1 )Do something and continue loop for line 2, 3, 4, 5, etc..
View 6 Replies
Oct 20, 2010
I need to read one specific line of a .txt file.. How do I do it?I don't know what item will be there so I can't search for a specific letter... It will be a textbox text.But I know that it will be the 3 line.Originally Posted by ExampleLorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla rutrum risus et ante tempus pharetra. Integer lacus felis, interdum non elementum in, egestas et ante. Aliquam eget nulla sed lectus accumsan congue at dapibus massa. Etiam nisi arcu, vulputate nec venenatis sed, fringilla nec ipsum. Duis quam lectus, venenatis sit amet faucibus ut, eleifend at tortor. Proin dignissim he
View 5 Replies
Oct 18, 2009
Im trying to use File.ReadAllLines to read a DLL that has plain text. (the DLL is basically a text file) [code] The process cannot access the file '****DebugNewFile.DLL' because it is being used by another process.How do I use readalllines to find text? How do I use readalllines to only search a part of the text file?
View 4 Replies
Mar 11, 2010
I have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
6400,3200,2,95.5,84,76.6,0
1,2,-20,15,0,0,0,"NO",0,0
TOTAL GPM= 6400 HWT= 95.5 CWT= 84.0 IWBT= 76.6 ALTITUDE= 0
CODE]...
View 1 Replies
May 14, 2012
I have a textbox which has a numeric value that changes - would it be possible to check if that value matches two numeric values in a text file? and if the value matches then to display some text in a label? The textfile only has fields displayed like so
Horizontal 55
Vertical 16
So I would only need to check if the numeric field in textbox matches the two numbers in the second column. In the past I have use System.IO.File to create/delete/append to files but I havent come across anything like contains.
View 6 Replies
May 6, 2010
How can I write and read a string array to a text file?
View 2 Replies
Dec 8, 2009
I am trying to read in demographics from a text file. What I am trying to do is use the commas in the text file as a stop and starting point for each field. Instead of explaining all will be clear once you look at the code.
Dim filecontents As String
Dim newlineindex As Integer
Dim numindex As Integer
Dim credents As String
[CODE]...
View 16 Replies
