Cannot Read Database File
Jun 21, 2010
I have an old VB.NET project that can read my database files perfectly.I have a second project (which is the exact same code as the first, just an updated GUI) that cannot read ANY access database files. Even if I create a new one from scratch. How can one project open database files without error, but the new one I made can't?This is the code I have for both of them.
Imports System.IO
Imports System.Data.OleDb
Private con As OleDbConnection
Private cmd As OleDbCommand
[code]....
I get the following error:Yes, I blurred out my file paths because you don't need to see the names of my folders due to privacy concerns.
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Jun 18, 2011
I want to read pdf file in the database sql server
but i want to read from my application or open adobe reader
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Oct 26, 2009
I have a series of .DAT files I need to read into vb.net and then parse the data into a format that can be easily read into an SQL database that already exists. Would I be using a StreamReader object? Or is there a different way to go about this?
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Sep 19, 2009
in my project I need to red a .txt file I do this with :
---------------------------------------------
Try
sr = New System.IO.StreamReader(TcheminFichier.Text, System.Text.Encoding.Default)
Dim ligne As String
Dim LineCount As Integer = 0
[code]....
That is work well but in this txt file I need to know if the line begin by O or by L I dont say how to do this How can i read the first carater off all line ?
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May 2, 2012
300,CA,San Francisco,twenty five,$50,PTL
300,WI,Queens,two fifty,$250,RTS
400,CA,Los Angeles,three twenty five,$100,LTL
[code]....
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Dec 16, 2010
I have problem with my application I have a table with 3 columns: column1(numeric(18,0), allow null), column2(nvarchar(255), allow null), column3(datetime, allow null). I want to read data from a .csv file and insert it into database. I use 'bulk' to insert data from file .csv into database instead of inserting query. But the problem is: the .csv file have to be formatted as:
[Code]....
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Mar 31, 2009
what I am trying to do is i have a table with four records and I want to write it to a txt file. I am running sql server 2000.I am able to connect to my database and I am able to right data to a txt file my only problem is it always returns the 1st row of data.
Dim FILE_NAME As String = "C: emp est2.txt"
Dim conn As New SqlClient.SqlConnection
Dim da As New SqlClient.SqlDataAdapter
[code]....
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Dec 29, 2009
I need to read rows from a database file (.wdb) to a datagrid. It's a cache file for world of warcraft or a database file for MS Works.
[URL]
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May 6, 2009
I'm using a background worker to read a XML file and do stuff in a database i get nothing in debugger but when i run it i get this error... how can i find out where and what is wrong? Exception has been thrown by the target of an invocation.
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Dec 29, 2010
I am looking at Visual Basic 2008 Step By Step. I need to read a flat file and insert the records into my SQL database. My code so far:
[Code]...
The INPUT line needs to be fixed. From what I can see, I need to move it all to a single field and use a split to parse it, correct? As I look at the entries on this site, all the code seems to use stream readers. Why would the book not do that? Am I missing something?
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Aug 10, 2011
I am trying to create a console application that does the following:
1) read a text file
2) Save the content over to a SQL Server database
3) Use command line arguments to allow user to specify any delimited file
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Jan 8, 2011
I am having a problem with my program that is desinged to read a 3rd party text file database. I posted previosuly about a problem inserting an item in a new row and the column was expectig a different data type. It appears that sometimes the column is being determined to be of decimal value, I dont understand why. the fields contain information such as
Col1
F123456
CLW-12321 etc....
So my column fills with
123456
12321 the letters just get chopped off
So I added MaxScanRows = 0 to my schema file and that took care of the problem
Except now several of my columns that contain Date Values are coming back
9/24/2010 00:00:00
without the setting MaxScanRows = 0
The date returned 9/24/2010
Here is the code for my schema ini file I am creating:
HTML
Dim fs As New FileStream("Schema.ini", FileMode.Create, FileAccess.Write)
Dim writer As New StreamWriter(fs)
[CODE]............
I have been trying different settings hence the dimmed out lines
Here is the code to fill the datatable:
HTML
[CODE].............
I am thinking that without the MaxScanRows = 0 setting the datatype for Col1 is being incorrectly determined
I am not sure what is happening with other columns that contain date values. Apparently If i use MaxScan Rows=0 all columns are being pulled over as string value which creates numerous problems. If I dont use maxscanrows then all columns appear to be correct except Col21 MLSNUM which is being pulled in as a decimal. Can I change that in the schema file?
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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]...
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Feb 24, 2010
I'm only getting started with VB.Net, using VB Express 2008.Using the System.Data.SQLite wrapper, I need to read data off a SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy.
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Nov 11, 2009
I want to read a text file(.txt) character by character into a database.There are 28 characters on each line and I want to read the first 16 into a column in a database and the rest in another column in the database.
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Oct 24, 2009
I have created a program that saves the co-ordinates of the users mouse and saves it to a text file to be used as an auto clicker.
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Dec 15, 2009
I'm using vb.net 1.1 to develop the program. I got text files that contain test result from a machine, like below.
T1 1.24535 2.56335 2.43253 1.24538 2.55619 4.35243
T2 1.42542 1.63728 3.57295 4.59275 1.57320 2.72057
T3 5.12857 2.45375 6.38593 2.58375 3.57259 3.57204
I need to check the test result with the data from database, to find out which test result is failed. If there is a fail test result, I will show an alert to the operator and stop the checking process. Until the operator close the alert, then the checking process will continue from the last read point.
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Jul 20, 2011
When I install my application, some forms are unable to connect to the database.
I say some because, when my login form works totally fine. Authentication happens.
But once I go into the main application, and open other windows, I start to get these error mesages:
[URL]
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Sep 21, 2011
I have a number of word documents I am converting. Everything is going great until I get a file that is read only. In this case I get a Save As prompt.
Is there any way to open the file in read/write format? I should have admin privileges so access isn't an issue.
I'm using VB.net to open the files. More specifically
doc = word.Documents.Open(path, Type.Missing, False, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)
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Feb 27, 2012
Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
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Oct 3, 2009
I'm trying to make a program that can read .mp3 data (Such as Artist, Album, Year, Track number, etc), but I need to be able to do two things that I have no clue how to do:
1. Read starting from a specified string (E.G, On one line it states: [code]
2. Read until a specified string (E.G, On the previously stated line,I need to read starting from what I said, up until.
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Jun 18, 2011
O/S WIndows 7
SQL Server : SQL Express 2008 R2
VB 2010 Express
SQL Server is located on the workstation so the code and the DB are on the same PC
Created a DB connection using the wizard. Tried this with Windows authentication and SQL authentication using sa
Created a Dataset and dragged the grid onto the form1.vb.
In SQL Sertver Management Studio I can update update tables using the same credentials as in the VB connection string
WHen I try to update a record in the VB Dataset it returns the error cannot update database because it is read-only
I have checked the files and folder attributes in SQL Data folder. Nothing is set to read only
I have checked SQL Server Database > Properties > Option > State > Databse Read only = false
I don't what I'm doing wrong here but I cannot get VB to update data via the dataset.
Inotice in SQL Server that the DBname now includes the full path "C:PROGRAM FILESMICROSOFT SQL SERVERMSSQL10_50.SQLEXPRESSMSSQLDATAPAYABLES.MDF" and not just the DB name. Is this becuase VB Express requires you to point to the physical DB file?
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Oct 14, 2010
[URL] to create my sqlite db file. I created it as a sqlite db version 3 file. When I go to open the connection
[Code]...
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Jan 11, 2011
i need to read binary file and in this file found the string and replace it with other one and save the file afterwords. I found many example to read binary, but to find and replace is for me mistery.
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May 4, 2009
I need to write data to a file, preferably in binary format, but I am unaccustomed with the concept. Where's the easiest place to get the basics? I could come here with a specific need, but I'm at the point right now where I am more willing to work within the confines of keeping it simple.
Here's what I know:
1. how to open a new file
2. how to specify the record length
3. how to close the file
Some specific questions:
Does the record length have to be constant throughout the file?
Can I read the nth record without reading the whole file?
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Feb 13, 2010
I have a fairly simple XML file that I just want to read the data from.
It has 3 levels, root, main section and items. There are no attributes. I want to go to the first main section by name, then read in all the items. The items all are named the same. I've seen this done before, so it should be ok. No writing will be done. Basically this is a static data file
File looks similar to the following:
CODE:
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May 21, 2009
in my text file i have two part. Called bottom and top. So i need to read the Top part first then and match the line with bottom part. Its like this
[Code]...
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Jan 13, 2011
I figure why this happens, and is because of Windows 7 and its permissions. Now I'm trying to fix this. but the code for this is a bit complicated for me. I found on this website an example on how to set the permissions on files. ([URL])
[Code]...
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Oct 31, 2009
I want to read XP sam database using VB.NET.. How can i achieve this
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May 2, 2011
What is the best way to read XML that is stored in a database as a varchar or other data type? I need to be able to work with the XML as XML and save it as a xml file outside of the database.
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