I found something very strange, in the data base explorer I modify the conection to the location of the data base(F:My DocumentsMy ResepteResepte.sdf) , but after raning the app. the path is back to what it was in the project folder and so the same in the selution window. It is set to Do Not Copy. How can I change this so that the IDE looks at the propper data all the time.
Hendri Bissolati noviceprogrammer@vodamail.co.za
I have a program that must copy a file to 3 locations, the local hard disk, a USB drive, and a network location. I have the file (about 70mb) loaded into a byte array. My quesion is, since I'm not actively modifying the byte array, can I impliment a form of multithreading where all 3 threads read the same byte array at the same time?
View 1 RepliesMy Dad made an application which had a feature that i want, basically his programme reads the users hard drive serial number and then multiplies it by say 12 and then divides it by 7 for example. This number is then shown as a 'Authorisation Code' which the user has to email to him and then his breaks it back down to the original hard drive serial number which he sends back which is the application serial number to activate it. I want to know how to read the actual hard drive serial number or a number that every computer has so i can do the same but i have searched everywhere and cannot find any examples for VB 2008 apart from one which didn't work
View 8 RepliesThe drive is connected via USB and the problem I'm having is that, periodically, while my code is executing, the usb drive seems to disconnect and reconnect. (Nothing to do with the program, but the drive itself).I want to find a way to prevent these temporary drive reconnects from interrupting my code. IE, i want to insure that whatever read or write that is requested is actually executed even in the case of a temporary drive interruption.
View 1 RepliesI am trying to write an application that accesses the SMART data from a hard disk, so I can show all the values and whether anything is over the threshold or failing etc Have spent many hours trawling the web without any success.
View 15 RepliesI use visual studio 2008 with an access database.I can read the data just fine, but when I try to update the database, I get an error:"Update requires a valid UpdateCommand when passed DataRow collection with modified rows."[code]The spaces indicate different parts of the code, but I just left out the non relevant parts.
View 1 RepliesI would like to know the best, or standard, way to accomplish real-time client updates in a small multi-user application using an access data table as a data source.Specifically, this application will be used by 3-4 people. It uses a datatable which is filled on form load and bound to a datagrid at design time. The datatable is stored on a shared drive. The data table on the shared drive is updated in two ways:
1) Users can update the datagrid which then updates the datatable on the shared drive via the data adapter's Update method.
2) A server application does some work on some text files, periodically updating the data table.
I need the clients to reflect the changes to the data table on the shared drive as closely to real-time as possible. I know that the data table stored in memory on the client is disconnected from the data table on the shared drive, so I must query again to get the updates.
1) Is there an alternvative model I can use which is connected, and which will automatically reflect the updates in the data table on the shared drive?
2) If not, what is the best way to check for changes in the data table (so I can know when to call the data adapter fill method)? I am planning to poll the drive for a change to the .mdb file, raise an event and then fill the data adapter when the event is triggered. I am using this method successfully now to check for changes to a text file in another application, and I know how to implement it?
I would like to know the best, or standard, way to accomplish real-time client updates in a small multi-user application using an access data table as a data source.
Specifically, this application will be used by 3-4 people. It uses a datatable which is filled on form load and bound to a datagrid at design time. The datatable is stored on a shared drive. The data table on the shared drive is updated in two ways:
1) Users can update the datagrid which then updates the datatable on the shared drive via the data adapter's Update method.
2) A server application does some work on some text files, periodically updating the data table.
I need the clients to reflect the changes to the data table on the shared drive as closely to real-time as possible. I know that the data table stored in memory on the client is disconnected from the data table on the shared drive, so I must query again to get the updates.
I have two questions:
1) Is there an alternvative model I can use which is connected, and which will automatically reflect the updates in the data table on the shared drive?
2) If not, what is the best way to check for changes in the data table (so I can know when to call the data adapter fill method)? I am planning to poll the drive for a change to the .mdb file, raise an event and then fill the data adapter when the event is triggered. I am using this method successfully now to check for changes to a text file in another application, and I know how to implement it
I am an old VB2 programmer and in the process of moving up. In VB2 I could obtain a data row via and index on an access table. I can not find an example on how to do this. I can retrieve a single row using a query, but an index would be faster. I know in Oracle use can use a hirt to direct the query to use the index.Here is what I was during in VB2 (Sample) with no hint.
Set Stock_Tbl = "DataBaseName".openTable(Stock_Tbl_Name)
Stock_Tbl.Index="Symbol_Idx"
Stock.Tbl.Seek="MSFT"
[code]....
I am sorry to keep bothering you about this damn DataGridView control ... As you might have noticed I am having a hard time with the DataGridView control ... My latest problem has to do with updating the data base file (Access) through a DataGridView control .
Up to now I have managed to successfully edit an entry in the DataGridView control and moreover to successfully update the data base file itself .
The above form and its code work fine . The problem starts when I am trying to run the code of the Update button from another form .
You see , I have another form , through which I change the contents of some of the cells in the DataGridView control (back in Form1) . What I want next is to simply update the data base file itself , just like I was doing with the button in the first form , after I manually changed the cell in the DataGridView control .Thus , on the second form I have a button with this code :
Form1.Button1_Click(Nothing, Nothing) (of course the Click event is declared public)I have also tried :
Form1.Button1.PerformClick()
but still nothing ...Although Form2 successfully changes the cells back in Form1 , the data base file itself does not get updated ...If I manually press the Update button in Form1 I once again successfully update the data base file , but I want to do the whole thing by calling the Update button from Form2 .
Does anyone know if there is a way to determine if a drive is local or a network drive?
View 1 RepliesI need to get my application to be installed on to the C: location in Visual Basic after ive published it.
View 7 RepliesI'm trying to get hard drive temperature data.I can get the temperature via MSStoragedriver_ATAPISmartData.And, I can get all sorts of drive info (model, serial #, etc. via the Win32PhysicalMediaClass.The trouble is trying to link the two together.I get this temperature info, but I don't know which drive it is.The only identifier I can get from MSStoragedriver_ATAPISmartData is InstanceName.That looks like it has the model number embedded in it, but I can't get model number in Win32 my question is how can I get the temperature data and realte it to a specific drive?
View 2 Repliesis there any way to find out the hard drive that windows is installed in? (local drive?)
View 4 RepliesAnyone know how i can get the harddrive id?
View 1 RepliesI would like to use the Windows Vista/7 defragmentation feature from my program. I can use a shell command to call defrag.exe, but there's no way to get the status that I know of. I would like to show a percentage and maybe what part of the process it's doing. Then when it's done get the results.
View 6 RepliesI have a VB.Net 2010 app and need to delete a file from the hard drive when the app opens up (cache file). What command will perform this action? I know the name in advance, so I can format the command right in the app.
View 1 RepliesI have made this program in which the user selects a number of directories and copies them all to an external drive. is there a way to detect when the user does something that involves writing data to the hard drive. When they do, I want my application to detect this and back up that file on the external drive as well so that the back up is always up to date.
[Code]...
How would I disable a device during runtime? I can do it by going to Device Manager and disable it from there, is there anyway I can do it from a program?
View 2 RepliesHow can I get VB.NET to find the folder that begins with "17014 -"? The actual Folder is called "17014 - Mr John Smith", but I want it to search only upto the "-" (hyphen) point.
I will then use this to check if the folder exists or not.
I would like to get the hard drive serial number.... to make a security feature for some software so it will only run on that hard drive... [URL]
View 13 RepliesI am looking for a way to retrieve the temperature of hard drives in VB Express 2008. I have found posts at a few different places that accomplish this with the following:
[Code]...
[code] i need to find a way to loop through ALL the directory's on the "c" drive and not just the main folder.
View 4 Repliesi have this piece of code:
[Code]....
and it works just fine. However, saying that, i need to find a way to loop through ALL the directory's on the "c" drive and not just the main folder. Does anyone have any code that can do that?
have this piece of code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim strFileSize As String = ""
[code].....
I want my code to open cmd and then change to an other hard drive. But instead bends lots of cmd come up.
I don't know what the problem is, but here is the code.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
I am looking for a way to retrieve the temperature of hard drives in VB Express 2008. I have found posts at a few different places that accomplish this with the following: Public Function GetDriveTemp() As Integer
Try
Dim searcher As New ManagementObjectSearcher("rootWMI", "SELECT * FROM MSStorageDriver_ATAPISmartData")
For Each queryObj As ManagementObject In searcher.Get()
Dim arrVendorSpecific As Byte() = queryObj("VendorSpecific")
GetDriveTemp = arrVendorSpecific(115
Next
[Code]...
This function retrieves the temperature for all the hard drives in my system (excluding USB), two internal and one external esata drive. There are two problems, tough: 1. I want to know the drive letter and maybe the drive label that the retrieved temperature corresponds to. I'm assuming that the * in the query, "SELECT * FROM MSStorageDriver_ATAPISmartData", can be changed to specify a particular drive rather than all drives, but I don't know how retrieve a list of all the drives in my system or how to write the query based on those results.
2. If I call the funciton from a some click event like for a label or button, there are no problems and the return value seems valid. But when I call the function from a Timer_Tick event, the mouse cursor is the busy cursor as long as the mouse is within the form, the form doesn't receive any click events, and it cannot be closed.
I know what I'm trying to do can be done because there are a few utilities that provide this information.
how to retrieve the temperature of a hard drive in Visual Basic 2005? The temperature can be retrieved from the S.M.A.R.T information, but I don't know how to do that in Visual Basic 2005. There probably is a way, but unfortunately, I don't know.
[URL]
I am using this code to get files, but I can not get it to search for all files on C: drive.how can I get it to show all files Like *.pdf of the drive in the list box
Imports System.IO
Imports System
Imports System.Drawing
[code]....
I've been checking endlessly on MSDN and the net in general trying to find out how to get the computer's "C:" drive serial number and also the GUID.Everything I've found seems to pointing to the System.Management library using the ManagementObject, but "ManagementObject" doesn't appear to be recognized by the IDE?!I've imported: System.Management, System.Management.Instrumentation, Microsoft.Win32 and System.IO, but ManagementObject is still coming up as an error.I'm aware I can simply access the registry to get the GUID, but can anyone simply give me the code to access these 2 elements please.
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