I have an ActiveX DLL that uses ECDSACom from Dragongate Technologies to create a signature for a product license. The product, when starting, uses the signature generated, the public key and the license to check if the license is good.But now I'm changing to .NET and 64bit applications and the ECDSACom can't be used since is a COM DLL. Is there any library so I can check the signature (given the signature, data that was
View 3 RepliesAny example code to encrypt a string using the new ECDSA algorithm?
View 1 RepliesI have this:
Private m_PerformanceCounter As New _
System.Diagnostics.PerformanceCounter( _
"Processor", "% Processor Time", "_Total")
[code]......
I'm seriously considering moving from VB.Net to C#. If you made the jump to C# from vb.net, then what were the best resources you used to learn the language going from novice to pro?
View 9 RepliesI am in the process of moving my Visual Studio development from a 32-bit to a 64-bit system I have set up VS 2008, and copied my build files from the 32-bit system over to the 64-bit system. The program builds OK, but whenever I try to openone of the child forms from the Main form, I get a COM error message (component not registered)
View 8 RepliesSo as a direct result of this global financial hoohar I'm going to start a new job as a VB.net developer tomorrow. Up to this point I've been developing in C# (bit of java, vb6, sql, tibco, etc. here and there)
So the question is this, what are the gotchas to look out for and does anyone have any good advice on writing good vb.net code?(Any other advice on coping with a salary / prospects drop welcome but not essential Just a quick update, company seems really good, current code base appears to be of a very high quality.Am starting to adjust to the VB way of doing things (can't stop myself adding semicolons everywhere though!).
I am finally making the move to vb.net after having supported VB6 apps all this time. I have been learning vb.net 2010 but am finding it difficult to find relevant information on the COM aspect. In VB6 COM was the dominating feature of the language, however, I can't seem to find relevant information on what has happened to COM in vb.net, does it still exist in vb.net, does it work in the same way or are apps designed in a different way in .net to do away with COM dll's?
View 3 RepliesI need to determine which tab the user is coming from, and going to, when they switch tabs, and possibly cancel the switch. I have tried the Deselecting, Deselected, Selecting, Selected events, and all of them show the e.TabPageIndex to be the same as the sender.SelectedIndex.
Is there an event, or property, that I can use so that I can determine both sides of this, or do I have to hack something together with caching it from one event and using that value in the new event.
I am trying to avoid handling the Deselecting/Deselected events and caching the value to use in the Selecting event. I already know I can do this, so I am asking if there is a cleaner way, without doing this.
I have tried in both C# and VB, with the same results (no surprise).
Am making a game for a college project, its just a mario like game except its a frog.
I want the frog to be able to jump on top of a moving platform in order to get to the other side. However the timer doesn't stop and the frog keeps on moving down. The moving platform has a separate timer called timer2 and the gravity timer is called timer1.
Here is a picture just to show you the game and the frog falling through the platform.
For some reason the moving platform leaves a trail of itself, be cool if you could also fix that for me hehe.
Here is the code for the 'collision '
If Player.Right >= platform.Left And Player.Bottom = platform.Top And Player.Left <= platform.Right Then
Timer1.Stop()
End If
im making a game (board game) so i need to restrict the picture (character) from moving more than picture on a turn (alfter move is complete they have to press the end turn button, what would the code be for this? (the board is spread into box picturesI like
View 13 Replies2008 Is there a way to keep a progress bar moving in a VB .Net windows application during long database calls (SQL Server - 10 seconds or so)? I tried a status strip progress bar running in matrix mode and a System.ComponentModel.BackgroundWorker running a progress bar but when the SQL call to a stored procedure is made they both freeze.
View 4 RepliesImage1 is a picture box in child window and vImage is a picture box in parent window. When I open the child window for the first time, I see a complete blank picture in Image1 while at the same time vImage is having a picture on it. When I Hide and reopen it again It has the picture on it. What is the problem and how can I fix it in my Code?
View 1 RepliesI'm a recent convert to vb.net (as in I'm doing my very first project) and would like confirmation I'm on the right track from someone more experienced. I've been given the task of generating a Purchasing program for work. I'm taking an object oriented approach, but I'm still new enough to object oriented programming that I am second guessing myself. Here is what I'm doing.
[Code]...
I'm replacing a text box with a combo box. I'm doing this since there are a set amount of inputs for this value. I added the combo box and entered in the values.The problem is that I can't seem to get the value that was selected..I tried setting a text box to the contents of the combo box and nothing happened.TextBox1.Text = cbbct.Text..That is what I tried and it didn't work. This really confuses me since I use a combo box to open save files and that works nicely.Also I'd like to use multiple tabs for my program. I made two tabs then cut and paste my text boxes,buttons, etc. onto them. After I did that I could not open a save file and have it populate the text boxes and set the check boxes. Is there anything I should be careful of when moving stuff to a tab or cutting and pasting?
View 18 Repliessimple code to move the picture in formsimply animation of the picture.
View 2 RepliesIt is my understanding and experience that VB.NET does not perform well with moving graphics from point A to point B in a form. How do I draw a rectangle or a line and move it from point A to point B? Is there a reliable way to do this without seeing a black rectangle around the moving object on every frame? I've tried this with bitmaps before but it doesn't work. I see the frame rendering and it's way to slow. Perhaps there is an animation Control or library?
View 3 RepliesI am just wondering how you can move a control toward the another control in VB.net. I have searched everywhere and cannot find a solution.
View 18 RepliesI have an application in VB6 that joins 3 tables together to create 1 record set and I am able to use the move next and move previous methods to navigate through the record set.
I am having trouble creating this same scenario in vb.net with a data set. Do I have to create each table individually and then link them together somehow or can I join them all together in a query before I fill the data set?
I am using VB 2008 Stanard. (Windows 7, 64 bit) I wrote a program using the 'Any Cpu' setting. I now want to rebuild the same application to word on x86 machine, but the program does not word, keeps on givin me an internal exepcetion.
I changed the Platform to x86, but it does not work. It compiles, but does not run on the Windows XP sistem, I does however work on Vista and Windows 7 How can 'n rebuild this to work on Windows XP?
I have a sql stored procedure that returns a certain group of columns in my datatable. How can I move (let's say) the column in the first position, to the last position before I export the datatable to excel ?
Dim myConn As New SqlConnection(strConnection)
Dim myCmd As New SqlCommand(strSQL, myConn)
Dim dt As DataTable = New DataTable()
Dim da As SqlDataAdapter = New SqlDataAdapter(strSQL, myConn)
[code]....
When the user selects a name in the listbox and clicks a button I save the name in a var called "parent".What I want to do is programmatically move the selected name to the top of the list and take that whole list and drop it in a dropdown. I started the code below but don't know how to move the selected list item (parent) to the top of the list??
Private Sub GoLower(ByVal parent As String,
ByVal lst As ListBox,
ByVal ddl As DropDownList)
[code]....
I want to find out the X and Y position of a point which is halfway between a point and another point, in VB.net. Since there is no "direction" property (which would make this much easier...), I have no idea how to do this.
C# code is acceptable as well, though I would prefer vb as it wouldn't require a port.
How could I move my VB.NET application to a folder using VB.NET in the same file? Essentially, I want to be able to move my VB.NET application to the Start folder when it is executed (within the same application). Also, I want to be able to move it to the same folder on any computer, for there is no set path to the Start folder on different computers. Or I would like to just create a shortcut for my application in the start folder?
View 2 Replieshow can I move the cursor using code in vb.net? I can't seem to find the proper method....
View 1 RepliesI have the mission to make a small game for a school project. Pictures boxes, moved by a timer for walking enemies.If there are around 5 or 6 moving picture boxes at the form, my application get troubles and lags.After I kill some enemies (remove them from the Controls Collection of the Form/Panel) It come back smooth.I think the loop of the enemy movement is too complicated but I don't know how to make that simpler.
[Code]...
I was trying to do a label that will slide from left to right of a web form in vb. I search on the web it only have example that work for windows application form.. I wanted it to be done in web form..
View 2 Repliesis this solution possible in asp.net [URL]
i just want to be able to move an image around on a webform
I realy need to know this: I have a custom control that need to keep the keyboard focus at all time. But I also need to let the user to click some button and radio. So, is it possible to tell these control to preform their task without moving the focus away from the custom control. NB: I know that Menu and tool strip button dont move the focus, but my task is to eliminate the tool strip and provide a graphical interface
View 4 RepliesWhen I place a control on a form and need to move it, it becomes invisible when I click the mouse to move . What did I accidently change? I use to be able to see it before.
View 3 RepliesI have been creating a program that copies and moves files from folder to folder; I am using this sort of code;
fileToCopy.CopyTo("path here...")
or
FileToMove.MoveTo("path here...")
My problem is, when I am copying or moving a large file, It's taking so much time and my program is hanging until all the files are completely moved or copied. How about, using a progressbar instead, so that the user will be able to see the progress of copying and moving instead of the program freezing?