Modifying Database Permissions - This File Is In Use
Sep 9, 2010
I'm trying to access a database (SQL Server 2008 express) using Visual Basic 2010 Express. First I got a permission error that was solved modifying the Database permissions. Now I get a new error message "This file is in use. Enter a new name .." I already have changed the Autoclose propertie to true, and also tried detaching the Database.
I'm using Windows Vista Home Premium, my string:
Data Source=.SQLEXPRESS;AttachDbFilename="C:Program FilesMicrosoft SQL ServerMSSQL10_50.MSSQL10MSSQLDATAemplo1.mdf";
Integrated Security=True;
Connect Timeout=30;
User Instance=True
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Mar 16, 2011
Locality Not repeating code..Modifying program means modifying one aspects.
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Jan 25, 2012
reading and modifying data from database
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Mar 24, 2011
I'm building a money management type application for just overall practice with Visual Basic, and I'm having issues modifying a number.It's a checkbook ledger, which stores the information in the text boxes into an access database. When you first load the screen, it asks you for your account balance (still a work in progress) which puts that data into a label on the form. When you add a record to the database, that new amount will get added/subtracted to what you typed in for your account balance.The problem I'm running into is the save function will first check if a radio button is clicked or not and negate the amount depending if you click Credit or Debit. Then after that's done, it performs the Sum aggregate function on the Amount Column in my database which puts the number into a variable. That variable is then added to the account balance that you typed in.I'll supply two of the functions that this is regarding. The Balance() function runs when you first start the form, and the Save() function is where the math happens.The accountAmount variable is declared under Public Class so that way the save function can use the variable to do the math required.
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May 12, 2012
I've been trying for a long time to create a sorted table of values in a particularly specific way, and I seem to be running into a wall in .NET's file operations. The premise is this - I'm creating a table of values which are being stored as [1 Byte][2 Bytes][3 Bytes]. The location within the file is a value that relates to these three stored values, and so I'm attempting to seek to a specific position in the file, write the 6 bytes into that position, and repeat. There are literally billions of these values, and the total file size is over 100 GB.
Now, I've tried multiple methods to do this, but every single time, it decides it needs to rewrite the ENTIRE FILE every time any change is made. This results in every one of these billions of iterations taking a good 15 minutes, making the task literally impossible. I'm using .NET 4, and I've attempted to use Text, Binary, and Random Access to get it not to rewrite the entire file every edit, but it simply will not obey.
So my question boils down to this: How do I edit specific bytes in a file without writing more than just those bytes? The entire file has been pre-created to the precise size required, and no bytes will be added or deleted in the process. I simply need to overwrite the bytes that already exist.
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Aug 21, 2009
I have a simple .NET 3.5 app for changing some database fields using an ODBCDataSet. Now the Feature Creep is asking if I can hide or show tabs and other controls based on the user's database permissions. Ideally, I would like to control the permissions only on the SQL Server using Windows user groups, and the app would not have any built-in authentication or permission system--it simply uses the logged-in user's Windows account for the database connection. So thus it would have to "test" the permissions to determine whether or not to show the tabs for the user. For example, if they have "write" permissions to a certain table, then the tab for editing it would be visible; if not, the tab never loads for them. How can I list or test the user's permissions to the ODBCDataSet?
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Aug 23, 2011
I found a CSS file while I was searching for how to create tabs without using images. I came across CSS Tabs 2.0. which serves my purpose.However, now I need to customize it to fit my asp.net page, and I can't seem to be able to get anywhere.The CSS file uses a
<ul and an <li
I am using a Table with <tr> and <td>
This is the sample code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">[code]......
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Jan 11, 2010
I have to convert this as stated. I am trying to retrive the next position line in an .txt file based upon a user's integer.Basically retrive the next .txt line from user input to an lbldisplay.
Option Explicit On
Option Strict On
Option Infer Off
Public Class frmMain
[code]....
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Jun 13, 2010
i am working on an application called logonscreenchangerxp i made my program and when i run it on xp virtualmachine i get errors the program is made using vb 2008 and using .net framework 2.0 i am not able to get full permissions to modify boot.ini file and a regisrty value and to delete a file
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Mar 23, 2011
1. The application's text box controls are entered manually in my.settings (e.g., tb1, tb2, tb3)
2. The application user "adds" a row of text boxes, which are iteratively assigned a name to match the above my.settings names
3. Upon "save" by user, the text in each text box is associated with its control (e.g., If cntl.Name = "tb1" then My.Settings.tb1 = cntl.Text)
4. The User needs to delete one or more rows previously added
Question:Under #4 of above, what is the best way to delete the rows and how can I use the app.config file to update the above data so I can reuse the named text boxes and keep everything sequential?
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Apr 17, 2012
I am using net 2010 net framework 2 & w7 In windows explorer I want to move or rename a file but I get a windows message with a heading "File Access Denied" you need administrator permission to do this In my vb code I want to move the same file but get an error, the security on the file is "Read & execute" and "Read" How do I detect this before the code for moving & also set the permissions so I can move it with vb code.
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Oct 14, 2008
On an xp system using VB 2008 exprees, I'm trying to write code which will change a file's permisions when run from a non admin account. To do this I need to now how to run the code as an administrator. I've got the code to change permissions working, I just don't know how to run it with an administrator's credentials. The code is:
Imports System.IO
Imports System.Security.AccessControl
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
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Jun 14, 2009
I modified some code to suit one of my other programs, but have come across a difficulty: For some reason, the output file is not outputting. I can tell all the calculations are being made (my computer is loud), but it's just not outputting.What should I look out for when modifying stanav's code that would cause the output file not to be outputted ?
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Nov 23, 2009
I have written a VB.NET 2008 application, incorporating Microsoft.Office.Interop.Excel, that modifies an existing Excel 2007 spreadsheet. It works perfectly on my WinXP development computer.When I upload the app to a Microsoft Web Server 2008, it opens the file and reads from the file, but when the app tries to save the file, it throws this exception:"System.Runtime.InteropServices.COMException (0x800A03EC): 'july2009.xlsx' is read-only. To save a copy, click OK, then give the workbook a new name in the Save As dialog box."The file is NOT read-only, nor is it opened by any other user or app.The app and the Excel file both reside on the D: (data-only) drive.My first instinct was to look at file permissions. When nothing else worked, I literally created a temporary Group, added EVERY user and security entity to it and granted the group full control of the entire D: drive. No luck.
Then I tried manually elevating the permission by running my app as administrator. No luck.Finally, I copied the file to my XP development computer and ran the app there. Of course it worked perfectly.Can anyone please tell me how to give my program permission to edit a file on Server 2008?
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Oct 8, 2010
Does VB 2010 offer native support for reading and modifying ID3 metadata in MP3 files? A brief search through MSDN shows me nothing, and I see someone says he had to write his own library of code for it. But that was some years ago, when you had to write code to access JPEG Exif metadata, and I know that's changed with the Image class and the GetPropertyItem method; so I'm hoping MP3 files have their own methods and properties now for this.
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Jan 15, 2009
I'm trying to put together a simple "file search" app that lets the user specify where to look, what type of files to look for, what the minimum file size is, etc. (I know...sounds kinda like capabilities that already exist in Windows!). I'm running into "access" issues, even with directories that I wouldn't think I should have any trouble accessing.I'm doing something like this:
Dim f As New FileIOPermission(PermissionState.Unrestricted)
f.AllLocalFiles = FileIOPermissionAccess.Read
Try
[code].....
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Mar 11, 2010
I have an application that is writing a comma separated values file. How would I go about altering the permissions of that file from .NET - for example to give read-only permissions to a particular active directory group?
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Nov 23, 2010
My software uses a Microsoft Access .mdb file and text files for data storage. The program works great when debugging but when I install the program with Windows installer, the program gives as exception message that access is denied to read the mdb and the text files. What should I do?
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Jul 6, 2010
I'm am developing a program for my computer and as I am using Windows 7 i have to execute it as admin every time I open my program. My IT teacher said I could set my program's permissions to 1, doing this the program would have admin privileges. But the thing is I don't know how to do it.
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Feb 11, 2011
I would like to read the NT Security (Read, Write, List, Inherited, blah blah blah) permissions from a file. I already have some code, and can get the names and SIDs, but cant seem to figure out the actual access bits.
[code]...
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Feb 13, 2011
I would like to read the NT Security (Read, Write, List, Inherited, blah blah blah) permissions from a file. I already have some code, and can get the names and SIDs, but can�t seem to figure out the actual access bits. I have found how to SET them, but not read.
Here is what I have so far:
Code:
Imports System
Imports System.IO
Imports System.Security
[Code].....
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Apr 19, 2012
I want to grant read access to a file in a server folder for the group servernameusers. This code works fine to set it for a specific user account, [URL], but I want everyone (all users) to get the right to read the file.
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Mar 22, 2011
I've added an FTP client to a batch publishing program that I wrote about a year ago. The batch program "publishes" CAD files from "Pro/E" to "eDrawings". Upon publishing, some of "eDrawings" files are automatically uploaded to an external server via the newly written FTP client.The publisher and FTP client are working great.I'd like to add functionality that automatically changes the permissions on the files I'm uploading to our unix server (RHEL5). When I do this via SSH, I simply utilize a chmod command (i.e. chmod 0755 file.htm).I'm using VB.Net's DirectCast in my FTP Client.Is it possible to change the permissions on the files I'm uploading via FTP once they're on the server as part of the file uploading process?
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Sep 25, 2009
I am using VB 2008 Express and have created an application that connects to a SQL database to populate a datagrid.The application is working properly on my computer but will not on others 'remote connection permissions' error.After some googleing I found that the express version is crippled to only work on local machines that use a database.If I purchase Visual Studio 2008 Standard Edition, import and rebuild my application, will my application be able to run properly on other PC's?
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Jun 9, 2011
Below is the part code I currently use to write to a file,
Try
Using sWriter As New IO.StreamWriter("C:Tmp.txt", False)
sWriter.Write(m_Buffer.ToString) : sWriter.Flush()
End Using
Return True
Catch ex As IOException
End Try
But some time this results in error
Access to the path 'C:Tmp.txt' is denied
My question is, Is there a safe way of detecting File access permissions, without handling exceptions, I mean if I can some how check before opening a file for any filehandle opened for it.
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May 21, 2012
Ever since I upgraded to Windows 7 Professional I've had constant build problems with VS 2008. I can't use the Hosting Process (not that I normally do) because at build I'll be notified VS could not copy a support file (the hosting exe). In addition, every time I build I'm told my previous exe is in use by another process and cannot be accessed. My only recourse is to manually delete the file. That works a few dozen times but eventually Windows stops letting me delete it and tells me that I require permission from an Administrator to make changes to the file (I'm the administrator,
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Jun 13, 2011
I'm writing and application that creates a home folder for a given user. I can set the permissions fine, but on some of the folders I need to remove a specific group/user, "Everyone" would be an example for one of the folders. I can make it so that they are denied from all the permissions on the folder, but I can't actually get the group/user remove.
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Aug 25, 2010
I've got two programs, one is the main and the other is the updater. So far iv'e got it so that the main program checks for an update by comparing its version number with the latest one that's stored as a text file on the server. If there's a newer one, the update program is started and the main one closed. The update program will then use a web browser component to navigate to the download link and download the new version. The only problem I'm having at the moment is, How can I get the new downloaded version to replace the current one in Program Files? and will this cause permission problems?
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Dec 14, 2010
Just tried to create a new Data Source in VB 2010, apparently I don't have permission to connect to the 'Login.mdf' file I recently created in SQL 2008. Does anyone here have any knowledge of how to surpass this problem? I'm the Administrator of my PC and have full permissions and UAC is turned off so that shouldn't be the problem either
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Nov 11, 2010
how do i change the file permissions dynamically by creating a interface for it..?i am using vb.net..so pls tell me how to go abt with the coding..
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