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You haven't said anything describing these "random sequences". How long are they? Variable length? What are the legal characters? Any illegal characters? Does if have to be in a certain format? Can the sequences be patially similar to previous ones in the same day? (Like "these" and "this")
You're going to have to "remember" the sequences somewhere to make sure that you don't use the same one twice. "Random" doesn't mean "unique" acrossed the set of available numbers.
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Hi Dave,
these random sequences have to be 6 digits long and composed using 0 to 9 and A to Z characters.
The intention was to make an alphanumerical counter but we want something more elaborated that seems a random number.
I was thinking to use an encrption algorithm where the string to encrypt shoud be the counter. By this way I shouldn't have to store the strings already done and I just have to store the actual counter value.
Thanks,
Marc Soleda
... she said you are the perfect stranger she said baby let's keep it like this... Dire Straits
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You could do this, but ANY RNG can generate the same sequence of characters somewhere down the line, however unlikely it may seem.
RNGCryptoServiceProvider Class[^].
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Hi again,
as I said I don't really need a random number, I just need a unique 6 digit number that it seems random, so, do you a encryption wrapper class that takes a 6 digit counter and encrypts it to a 6 digit alphanumeric string. That would do the job, but I don't know which one does it!!
Thanks in advance,
Marc Soleda
... she said you are the perfect stranger she said baby let's keep it like this... Dire Straits
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Hi Marc,
The first thing that comes to mind is to make use of Now(). Whenever you call it, it will give you a different value, and it will never ever repeat.
You could for example use its .Hour, .Minute and .Second parts, and replace leading zeros with a random letter from A to Z.
Alternatively each datetime is a number as far as the computer is concerned, and will also nerver ever repeat, so you could use that in some sort of algorithm or formula.
Johan
My advice is free, and you may get what you paid for.
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I need to add escape characters to a VB string but I get errors.
The string needs a double quote, and an asterisk
ie. "this is the string \" \*"
Problem is, this isn't working...something about a type mis-match.
Any ideas?
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To do double quotes, you have to use two of them to escape it:
Dim stringWithDoubleQuotes As String = "This is a ""test..."""
The contents of the string will be This is a "test..."
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I need to be able to label the tick marks on a Trackbar (slider) control in a VB.net 2005 Windows applaction. The labels need to be centered under each tick mark. For example, if a Trackbar has five tick marks, I would like to number/label them "1", "2", ..., "5". The number of tick marks will very dynamically during run time. Thus, the labeling must be dynamic. Also, the Trackbar is anchored Top, Left, and Right. When the Trackbar is resized, the label should be repositioned under their respective tick marks.
Rob True
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There is no support for labels in the standard TrackBar control. You'll either have to find a 3rd party control that supports this, or implement your own version that includes this support.
You can find an approximation of a custom TrackBar in this article[^].
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I have following error in window service same code is working in window Application
"QueryInterface for interface SQLXMLBULKLOADLib.ISQLXMLBulkLoad failed."
Dim objbl As SQLXMLBulkLoad3
objbl = New SQLXMLBulkLoad3
objbl.ConnectionString = "Provider=SQLOLEDB.1;Data Source=pcDB;Initial Catalog=webdb;User ID=sa;pwd=sa"
objbl.ErrorLogFile = "c:\error.log"
objbl.BulkLoad = True
objbl.KeepIdentity = False
objbl.CheckConstraints = False
objbl.Transaction = False
objbl.Execute("c:\Items.XSD", "C:\Items.xml")
Thanks
Hardik Panchal
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Does the ASPNET account that your code is running under have any rights to the root of the servers C: drive so it can read those files? I doubt it...
Move the files to where your code is executing from and change these hard coded paths to find the files in the correct folder and it should work.
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I have an application on a server that uses word templates to generate letters. When the client opens the application a query is made to a database, data is returned and that data is then inserted into bookmarks in the word template. The instance of word is opened locally so no office applications are actually installed or ran from the server; the templates are stored in a shared folder on the server.
I can open the template and print a letter, other user's get an exception not handled error, but if the application is actually on the local machine they are fine.
I would appreciate any suggestions.
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jimbaloo wrote: I can open the template and print a letter, other user's get an exception not handled error, but if the application is actually on the local machine they are fine.
What does this mean? If Word is not installed on every computer that is going to run your application, you're wasting your time.
You also neeed to copy any .DLL files you found in your Release folder to the other client machines in order for this to work.
What's the exception? What does the code look like where it occured and on what line?
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The application is not installed on the local machine. The client wishes this to run from an application server and only use the copy of MS Word that is installed on the client machine.
The application on the server manipulates the data, and then calls to the client machine's version of office to insert the text and print the document.
Right now I cannot find what the exception is because from my box it works, and no one else has a copy of Visual Studio installed so I cannot debug from another station.
Other user's can use the application to access the stored procedures. It is just when they attempt to use Word. The application reads from a local Excel file into a dataset, so the server is communicating with the local machine without any .dll's being copied to the local box.
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jimbaloo wrote: It is just when they attempt to use Word. The application reads from a local Excel file into a dataset, so the server is communicating with the local machine without any .dll's being copied to the local box.
The .DLL's would be the Primary Interop Assemblies that the client side needs as a wrapper between the managed .NET world and the unmanaged COM world of Office. They are NOT optional files if you want to interop Word, which is what you're doing.
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To copy the .dll's onto a user box
Where on the user's box would I need to copy the .dll's? I have had one user try just copying the entire application onto his box but with no success.
I really appreciate your help on this. Thanks
Jim
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Everything you find in the projects bin\Release folder (*.EXE, *.DLL, *.config) goes into the same folder on the clients machine.
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Can v play video & audio files like .mp3 , .mpg, .wav, .wmv etc.
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You can use the windows media player control, or direct show to do this.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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ankur0101 wrote: Can v play video & audio files like .mp3 , .mpg, .wav, .wmv etc.
Yes.
Regards,
Satips. ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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ya but how???
whats a code??
only thing i knw is to play .WAV files with no display
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i also want to know how can we open Form2 from Form1??
Here is example
Im in Form1
there is Menustrip >>
File | Edit |
Now there are sub menu in File "open Form2"
---------------------------------------------
In short i want to open other form from Menustrip
what i have to do??
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I recommend buying a book on VB.NET and working through it. If you don't know how to open a form, odds are you don't know enough to take any knowledge from the answers you will get here.
The answer is, you create an instance of the form class, and call it's ShowDialog method.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Christian is correct. If you can't work out how to open a second form from your main form, the rest is going to be neaerly impossible for you to learn on your own. Seriously, pick up a couple of books on VB.NET for Beginners so you can get an explanation of the basics. If you don't, you'll be completely lost in no time.
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But im having book of Visual Basic.Net
but it has not specified how to play audio & video files
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