Currently I have to retrieve over 2000 records from DB and bind with combobox. and then follow with another 3 retrieving (less than 20 records)My problem is when I call this function, my GUI became freeze.I try to use Application.DoEvents() method but it still didn't work.I read some post and pages, they mention about BackGroundWorker and .Net 2.0.But what i use it MS 2003 with 1.1 so i think i can't access BackGroundWorker.
View 6 RepliesDoes anybody know how I can prevent others from referencing and using my VB.NET dlls?Because when I create a dll then I can easily reference it to my project and use the code in it. So my main concern is that when I distribute my application others can use these dlls.
View 8 Repliesi coded a simple webbrowser and started surfing with it but i realise it doesnt prevent pop up advertisements.. how i prevent it?
View 1 RepliesIm wondering, whats the code for looking up and preventing a number from being submited into, say a textbox?
View 2 RepliesHow can I prevent pop-ups while using WebBrowser1? If possible, I would like the url to open within the WebBrowser - not in a new internet explorer browser window.
View 3 RepliesI have an client.exe, through contextmenu in windows explorer i run this client.exe. is working fine. How to prevent , if user clicks same client.exe while its already runs.
View 5 RepliesI've been contracted to analyze an existing Data Provider and I know the following code is faulty; but in order to point out how bad it is, I need to prove that it's susceptible to SQL injection.
Question What "Key" parameter could break the PrepareString function and allow me to execute a DROP statement?
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I have a textbox to which text is continuously appended (every second new status data at the end).I would like to act it as follows:- When the cursor is positioned at the end: Stay at the end, scroll the textbox (text disappearing at the top).- When the cursor is positioned somewhere else (not at the end): Stay exactly there, don't move the cursor, don't scroll, don't change the top line of the textbox.This seems to be surprisingly difficult (tried quite several ways).This is how far i came:
Private Sub addToTextBox(ByVal daStrg As String)
Dim posAtEnd As Boolean, selPos As Long, selLng As Long
If myTextBoxForm.txBox.SelectionStart = myTextBoxForm.txBox.TextLength Then
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The '&' in the text gets escaped and gets converted to & when creating the xml file using XmlTextWriter but i dont want the conversion to take place how to prevent it?
Is there any other way besides using WriteRaw func of xmltextwriter?
You developing a application named "DemoSoft" which is going to be a shareware or Premium, you use different DLL's in this project and some DLL's are owned by you, they are very useful and valuable, you are selling this software and are charging the customer for what the software does but since this software uses one of your Valuable DLL, actually few functions from it you have to deploy it and cannot additionally charge for the whole dll. since that would be unwize.now i want to ask what can you do so that This DLL in "DemoSoft" cannot be exploited, meaning end user could use my software but if some thief tries to use my supplied DLL in one of his own app he is unable to do it, in simple terms DLL should work only and only with DemoSoft.
View 5 RepliesHow can you detect when the registry is changed? Furthermore, how can you prevent changes to the system registry? I want to create a security tool, but can't seem to find this anywhere.This is in vb.net.I know the registry is stored as files on your computer somewhere, but I have no clue where it is stored, though I could probably use a FileSystemWatcher component to check it.Then, for prevention, would simply duplicating the registry files and rolling back the changes work?
View 1 RepliesWe know a tolower function will turn all A to a How to turn all à to a.The purpose is I am creating ids for databases and id need to be unique. Sometimes the same stores are written as à in one place and as a on other places. This will create duplicate id problem.So I need a function that will turn all à and all of it's variation into a. The same way ě should become e.
Basically I would use utf8_unicode collation on my databases. Letters that count as the same letter under that collation should map to the same character under this function.I need to make sure that all other east asian characers are not affected in anyway.
I want to prevent from resize of form. I set false MaximizeBox and I set FormBorderStyle to FixedSingle. I couldn't change the MaximumSize of form at runtime. If the user double click on the Tiltebar of the form the form resized. I couldn't prevent that
Then I write the following code at size changed event
If FormLoaded Then
Me.MaximizeBox = True
Me.WindowState = FormWindowState.Maximized
Me.StartPosition = FormStartPosition.WindowsDefaultLocation
Me.Size = InitialSize
Me.MaximizeBox = False
End If
I have a small problem with my application. When the system starts up, the program starts with it, but runs hidden (registry key with paremeter). The program also has a GUI.I want it so that when the user clicks the desktop icon, it does not start a second instance of the executable, but instead reveals the currently running background process. Is that possible?i.e. when the application is started with the "-startup" paremeter, it loads a hidden form2, and closes form1. When the desktop icon is clicked, it loads form1, while form2 remains hidden.
View 4 Repliesi got 2 program here...exe and B.exe.. B.exe is external program.. how can i run my program just once at same time? all start from .exe.. if .exe running twice, a messagebox appear ".exe already running".. if .exe detect B.exe was running, a messeagebox appear "B.exe already running".. i'm using Visual Basic.NET..
View 2 RepliesWorking with winforms I wonder if there is some way to prevent vertically resize of the form. I would like to allow user to resize form in all directions except vertically.Moreover I would like to allow vertically resize in upward direction, but not downward.
I have tried to use maximumsize by setting it to: Me.maximumsize = new size(0,me.height)
I set width to 0 because I want to allow user to change form width.
Is there a simple way to do this without having to programme a complete application level firewall or using Windows firewall?I found this very interesting: Winsock Injector It disables the use of Windows Sockets (winsock) for selected processes.Can such an injector be done in VB.NET and does it work for everything?I tried the injector but it doesnt seem to work for certain applications?
View 1 RepliesI've got this little 'Sticky Notes' type of application and the form I have is a borderless, taskbarless form and for Windows 2000 compatability I'm using VS 2008 and targeting the 2.0 framework. One of the hurdles I have is that in XP, Vista & 7 when you click the Show Desktop button all of my note's windows get minimized and without a taskbar icon, it's not easy to get them back (at least not for a normal user) & I'm looking for a way to either right after the windows minimize I just have them all show again or if I can skip the minimizing message in the wndproc altogether
I've put together a test app that'll show the messages in a listbox for the form, but I'm not sure how to go about skipping sending the message to the form's base class. Here's a snippet, listMessages is the listbox on the form[code]...
We have 2 apps that we display at once for data entry. 1 taking up the left side of the screen, and 1 taking up the right side.
1 of those apps is the data entry application. The other app is for viewing scanned info. But they can't talk to each other directly.
So I'm creating a tool that runs in the background to intercept certain keys.
I want to be able to capture keys such of Ctrl + Home, Ctrl + Page Up, etc from the data entry application, and send it to the scanned image to rotate it or zoom, etc.
I believe I can do most of it, except 1 part.
Right now if I did Ctrl + PageUp, it will send the key press to both apps. How do I prevent a keypress from the originating application?
Is there a way to prevent an OpenFileDialogue box from using so much memory other than using a background worker control with it?
I tried to use it with the bg worker control but it worked a bit quirky...
i want to be able to prevent an application from downloading. For example Utorrent. I have seen applications that can do this but never been able to integrate it in my own application. Also i have tried blocking the application's allowed ports in my windows firewall
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How to prevent the text in checkbox from wraping?
I am making a class that will behave like a collection class. I want to prevent the end-user from creating a new class of this. For example, the following should give error:
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How do I prevent a duplicate entry from a text field by using SQL Query?
View 3 RepliesI have a form with 4 textboxes. How would I prevent the user from entering a duplicate value upon keypress?
View 8 Repliesi have a datagrid which i add values with this code
Me.dgAppraisal.Rows.Add(Me.cmbAssementArea.Text, Me.NumericUpDownArea.Text, Me.txtremark.Text, Me.txtcoment.Text)
What i want to do is to prevent duplicate entries of values in a column.I am using this code but it is not working.
If Me.dgAppraisal.Rows.Count > 0 AndAlso Me.dgAppraisal.Rows.Contains(Me.cmbAssementArea.Text) Then
ErrorProvider.SetError(Me.dgAppraisal, "Employee has already been assessed on
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I have this code and it is not working correctly. Note: The code must check the if the data is valid every time the user enters a new datai have 2 columns in my table
Code:
Private Sub Table_CellValidated(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.CellValidatedEventArgs) Handles Table.CellValidated
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I have a textbox1.textchanged event in my application.. so when I start typing into the textbox, it looks up the value of what I'm typing against a dataset. There is a datagrid in my application as well, and if i click a cell in the datagrid, it pastes a value into that textbox... when this happens, I don't want the textbox to do look up the value against the db.. I just want it to paste into the textbox without any further action..
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small project .i have the exe inside bill which i will install in another system the bin files is ok it work finei need to make it secure . can u suggest me how to make it suceure so that if someone copy and use in another machine it cannot run and display message. it can be by registry or by dll files
View 3 RepliesI am using the printform object from the powerpack, I have a form that I want to print and take up the whole page when it is printed. To do this i have to resize the form and then print it.. then take it back to the orginal size.
View 5 Replies