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The combobox shows the selection now, if I understand you correctly, so you are able to access the data you wanted. And if I recall, you have an associated value of calories displayed in the textbox. Is that correct? Now you want to enter a quantity of the item in another box, multiply them, and display the total calories. Have I got that right?
Since a textbox only holds text data, the first thing you'll need to do is cast their contents to numeric values:
Int32 Cals = System.Convert.ToInt32(txtCals.Text);<br />
Int32 Qty = System.Convert.ToInt32(txtQuantity.Text);
Then you need to perform the calculation and convert the result to text to store it in the result textbox:
txtResult.Text = System.Convert.ToString(Cals * Qty);
I make no guarantees, since I'm new to C# and .Net, but I believe this will get you on your way again. Let me get a few chapters ahead of you and I might be able to help with the database part. 
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
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That is right I will give this a try thanks. Do you know of any good C# help sites that might have videos or code examples?
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As a matter of fact, I do! You're already a member.
Spend a bunch of time in the Articles section here; there's a lot of excellent code examples, many with clear, informative explanations. I haven't seen any better resource.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
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Great I will start my search today. I just want to get better at the basics before I move up to the big boy stuff. Thanks for you advice and help.
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Hi? I have a problem. I got the file which has dvi extension. Of course i can use some application but problem is i want to create my own application.
Please help me and guide me how to read the binary file with dvi extension.
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You need to research the file format so you can parse it correctly. This[^] may help
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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I have an application where the user sets-up a workspace. The workspace has a variety of elements including arrays, bitmaps, generic lists, etc. When the user is done working he/she can save the workspace. The application saves the elements in a sequenced, binary file. When the user comes back, he starts the application and loads the workspace through an “open” menu item. It works.
Now, some users instinctively navigate to the file and double-click to both start the application and load the file. I’m all set with setting the default app for the extension and all that. But, what is the standard procedure for instructing the application to load the selected file if it has opened by way of a file double-click?
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when you double-click a file in Windows Explorer, it will launch the application associated with the file extension, and pass the full path as the first command line parameter (or several if several files were selected). So let your app look for command line arguments, and if there are any, open them.
Either use the optional parameters of the Main() method, or use the Environment class to get the command line.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that. [The QA section does it automatically now, I hope we soon get it on regular forums as well]
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Spuose your app displayes images. You set the default "open with and all that" to your app.
Then in program.cs inside Main after Application.Enable.... do something like this:
if(args!=null){
Application.Run(new MyCoolImageViewer(args[0]);
}
else{
Application.Run( new MyCoolImageViewer(null);
}
And of course in your ctor check for null before opening the image.
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I have this function that is called from the constructor of the main form:
private void InitNet()
{
listener= new TcpListener(localAddress, portNo);
listenForConnection = new Thread(StartListening);
listenForConnection.Start();
Control.CheckForIllegalCrossThreadCalls = false;
}
The StartListening function is defined as follows:
private void StartListening()
{
listener.Start();
while (true)
{
Networks user = new Networks(listener.AcceptTcpClient());
}
}
When i close the program, it does not get out of memory, possible because of the thread. I have tried to abort the thread in the FormClosing Event but this did not work, how can i close this application competely (Of course not using task manager!  )
Wamuti: Any man can be an island, but islands to need water around them!
Edmund Burke: No one could make a greater mistake than he who did nothing because he could do only a little.
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Wamuti wrote:
CheckForIllegalCrossThreadCalls = false;
Evil 
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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You need to tell the thread to stop so that it can cleanup its resources and exit:
[RE-EDIT]
bool runListener = true;
private void StartListening()
{
listener.Start();
while (runListener)
{
if (listener.Pending())
{
Networks user = new Networks(listener.AcceptTcpClient());
}
else
{
Thread.Sleep(250);
}
}
listener.Stop();
}
then in the FormClosing event (or wherever you're doing cleanup) set runListener to false.
Also, if you set the thread's IsBackground property to true then the thread won't cause the program to remain alive even if it isn't terminated before the form closes.
Control.CheckForIllegalCrossThreadCalls = false; And that's just completely uncalled for.
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Thanks. It worked.
Wamuti: Any man can be an island, but islands to need water around them!
Edmund Burke: No one could make a greater mistake than he who did nothing because he could do only a little.
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Glad to help
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Thanks again for the optimization.
Wamuti: Any man can be an island, but islands to need water around them!
Edmund Burke: No one could make a greater mistake than he who did nothing because he could do only a little.
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Hi to all
I need a component for convert text to speech and speech to text
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Hello
can help me in my problem.I need deal with very big number to add,sub,multi and divide I can do the add,sub and multi but can't do the divide can help me.
I need divide very long integer number such that
x=444444444444444444444444444444444444444444444444444444444444444444444444
y=3333333333333333333333333333333333333333333333333333333
or more that each number consist from more of 300 digit can I divide it and result is div and mod.
thanks.
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I can't see any possible application for that sort of number crunching. What is a 300 digit integer anyway?
Look at the maximum sizes of the datatypes, you're going to find you can't actually store numbers that big.
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Apologies for a severely lacking knowledge of the datatypes. At least I can go home today knowing I learnt something.
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hammerstein05 wrote: I can go home today knowing I learnt something
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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hu_kh00 wrote: I need deal with very big number
Try one of the BigInt[^] implementations
I are Troll 
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IIRC Microsoft J#[^] has a BigInt implementation that can be used by any .NET language. It looks like they're dropping j# so get it while you can!
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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