Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further. - C# Discussion Boards

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

10-Nov-22 2:05

Hi, i deployed the code on my embedded device for debugging, when file is not found message box will show to alert user. However after completion of foreach loop code should continue further, right?? But when i pause my code it is still stuck at line Message.ShowBox. Code after foreach loop does not get execute.

Richard Deeming10-Nov-22 2:24

Richard Deeming

10-Nov-22 2:24

You haven't shown any code after the foreach loop, so we have no idea whether it should continue.

Does the message actually show? Have you dismissed it? Does the MessageBox.Show method actually return control to your code?

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

Radheya Patil10-Nov-22 2:42

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

10-Nov-22 2:42

The below code runs in an infinite loop in console application. Message box is shown and user press OK everytime it is shown. At last iteration of foreach loop when user press ok it should continue to check next if condition in an infinite loop, mean while it does not. And when i pause my code to check where the control of the code is, it shows me control at Message.ShowBox line and even after pressing step over it still remains at that place.

Just for info.. it is developed in .net Compact 3.5 in visual studio 2008

for(;;)
{
if (CheckBitData(5, 965) == true)                                   //Checking Read Request from File to Mac
                {
                    string[] TypeofProcess = { "P", "V", "F", "C", "Q" };
                    int i = 0;
                    foreach (string p in TypeofProcess)
                    {
                        string FileToFetch1 = getFileName(p);
                        if (File.Exists(FileToFetch1))
                        {
                            using (StreamReader r = File.OpenText(FileToFetch1))
                            {
                                ReadAndDumpToCNC(r, 36000+i, 31000+i, 41000+i);
                            }
                        }
                        else
                        {
                            MessageBox.Show(p + "File Not Found...!!!!");
                        }
                        i = i + 1000;
                    }

                    MakeZeroPMC(5, 965);
                }

                if (CheckBitData(5, 967) == true)                                   // Data File Generation using History Data
                {
                    ManipulateArray(31000, 31999, 41000, 36000, 11075, 11076);      //(readStart,readEnd,wrStart1,wrStart2,MaxVar,MinVar)
                    MakeMasterData("Power", "Max", 41000, 41999);
                    MakeMasterData("Power", "Min", 36000, 36999);
                    ManipulateArray(32000, 32999, 42000, 37000, 11077, 11078);
                    MakeMasterData("Voltage", "Max", 42000, 42999);
                    MakeMasterData("Voltage", "Min", 37000, 37999);
                    ManipulateArray(33000, 33999, 43000, 38000, 11079, 11080);
                    MakeMasterData("Freq", "Max", 43000, 43999);
                    MakeMasterData("Freq", "Min", 38000, 38999);
                    ManipulateArray(34000, 34999, 44000, 39000, 11081, 11082);
                    MakeMasterData("Curr", "Max", 44000, 44999);
                    MakeMasterData("Curr", "Min", 39000, 39999);
                    ManipulateArray(35000, 35999, 45000, 40000, 11083, 11084);
                    MakeMasterData("Quench", "Max", 45000, 45999);
                    MakeMasterData("Quench", "Min", 40000, 40999);
                    MakeZeroPMC(5, 967);
                }

                if (CheckBitData(5, 968) == true)                                   
                {
                    DumpMasterDataG1V();
                    MakeZeroPMC(5, 968);
                }
                if (CheckBitData(5, 969) == true)                                   
                {
                    DumpMasterDataG1Q();
                    MakeZeroPMC(5, 969);
                }
                if (CheckBitData(5, 970) == true)                                   
                {
                    DumpMasterDataG2V();
                    MakeZeroPMC(5, 970);
                }
                if (CheckBitData(5, 971) == true)                                   
                {
                    DumpMasterDataG2Q();
                    MakeZeroPMC(5, 971);
                }
            
                System.Threading.Thread.Sleep(10);
            }

Richard Deeming10-Nov-22 3:00

Richard Deeming

10-Nov-22 3:00

"Step over" will execute the line, which will show the message box. The code won't continue until you press "OK" in that message box.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

Radheya Patil10-Nov-22 17:37

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

10-Nov-22 17:37

Yes at last iteration also, it is executing message show box line then message show box appears then i press ok. Only after i press ok message box disappears and control of code remains on that same line it doesn't continue my for(;;). And my application doesn't responds to futher triggers

jsc4210-Nov-22 6:08

jsc42

10-Nov-22 6:08

How are you expecting to escape from your infinite loop? Your first line is

for(;;)

, so when your main inner loop has finished, it will start all over again unless you have a

break

lower down that we cannot see.

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

Radheya Patil10-Nov-22 17:39

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

10-Nov-22 17:39

yes i want to continue my for(;;) loop but my code gets stuck at Message Box even after i press OK on Message Box.
There is no need of break statement

OriginalGriff10-Nov-22 21:18

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

10-Nov-22 21:18

The chances are we can't help you - it looks like you need the exact hardware you have setup in exactly the same way, and we have no access to that.

So start small, and assume that it's something to do with "multiple message boxes" on your system. Create a minimal console program that increments a number in a loop and displays it in a MessageBox. Test it. Does that fail after 5 presses? Or 10? Or 100? If so, it's something to do with how MessageBox interacts with your hardware / software combination, and we can't do anything about it - talk to the tech support for your embedded device.

If it doesn't ... then it's your software. So start expanding your minimal app until it does fail after 5, 10, or 100 presses. When it fails, you know it is what you added that caused the problem - so look at what you just added!

Sorry, but we can't do any of that for you!

Eddy Vluggen11-Nov-22 7:37

Eddy Vluggen

11-Nov-22 7:37

Sorry for being late to the party. You do not, ever, use a MessageBox in a non-GUI app. In services we write to the EventLog, in console we write to the.. console.

Replace it with a Console.WriteLine. After that, we'll look further. But never, ever, use something that displays a UI on the console. If you think you need an OK-Cancel button, you wrong. You need to readline (Y/N) on the console.

Is this during an education?

Bastard Programmer from Hell Suspicious | :suss:

"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

Re: My Code gets stuck at MessageBox.Show() after pressing OK it does not move further.

Gerry Schmitz11-Nov-22 7:46

Gerry Schmitz

11-Nov-22 7:46

You're looping and simply displaying the same information. Your "5" corresponds to the 5 items in your array.

"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I

Net framework again

Calin Negru8-Nov-22 8:59

8-Nov-22 8:59

I’m trying to get a better understanding of net framework. I used to think net is just a MFC replacement. GUI programming on Windows the easy way. Windows is basically GUI tied to device drivers. In my mind .NET doesn’t reach the driver level, it’s just shallow scripting

OriginalGriff8-Nov-22 11:05

8-Nov-22 11:05

Yes, in the same way that a F1 car is just a Ford Fiesta replacement.

You can compare MFC to .NET, but .NET is a lot more than "just a windows framework" - MFC is just a structured C++ framework around the Win32 API. But it made Windows development so much easier than the entirely manual message handling that preceded it. And .NET makes development so much easier than MFC was^*. It's also language agnostic in a way that MFC never could be, despite being a solid part of C# - to the point where C# can't actually do much if anything without .NET behind it to provide even basic string handling! The number of languages that you can use .NET is is pretty impressive - and any assembly written in one of them can be used in another as it it was written in the same language.

I used C for Windows, Then C++, then MFC/C++, and finally moved to C# with .NET and despite it's vast scale it's pretty much consistent: it something works for one control, there's a good chance the same properties will exist in another for example.

Would I go back to DLL Hell and MFC? Not a chance in Hades!

* You may have noticed that I didn't mention "Windows" with .NET - it also exists for Linux, Android, and iOS via Xamarin. Try that with MFC ...

Calin Negru8-Nov-22 23:01

8-Nov-22 23:01

I feel like I’m traveling back in time. After seeing what Windows forms is all about it’s time to see what MFC can do. But this thread is about .net. I should probably look into what other things .net comes with, besides forms

modified 9-Nov-22 4:36am.

OriginalGriff9-Nov-22 0:14

9-Nov-22 0:14

Shed loads.

I'd strongly suggest a book on the subject: they should present the whole of .NET so you don't miss something you could have used later if you had known about it!

Wrox do good ones, as do Addison Wesley and MS Press.

Calin Negru9-Nov-22 5:00

9-Nov-22 5:00

Thanks for advice

OriginalGriff9-Nov-22 5:12

9-Nov-22 5:12

You're welcome!

Sam Hobbs8-Nov-22 18:59

Sam Hobbs

8-Nov-22 18:59

.Net is a combination of many things. The GUI designers are more like VB 6 and VB prior to 6.

.Net does not have the equivalent of the Document/View architecture built into it as it is in MFC.

.Net does not support mixing languages using a linker as does unmanaged code does. Use of multiple languages by a .Net application requires that each language be a separate executable (DLL or the single exe file).

Much of .Net is based on Java.

The .Net intermediate language might be an evolution of the technology Microsoft had in the original Basic interpreter in DOS.

The designer and original developer of C++ explains that C++ does not support the kind of feature (such as the .Net intermediate language) that provides the portability that Java and .Net languages provide.

Richard Andrew x6420-Nov-22 7:34

Richard Andrew x64

20-Nov-22 7:34

Sam Hobbs wrote:
Much of .Net is based on Java.

How much are you saying is based on Java?

And what do you mean by "based on?"

The difficult we do right away...
...the impossible takes slightly longer.

Gerry Schmitz8-Nov-22 19:02

Gerry Schmitz

8-Nov-22 19:02

There are some 124 name spaces in the framework / class library; maybe 20% are dedicated to GUI programming. UWP and WPF use DirectX; which is close enough to driver level.

Richard Deeming8-Nov-22 22:38

Richard Deeming

8-Nov-22 22:38

Gerry Schmitz wrote:
There are some 124 name spaces in the framework / class library

Try counting again - there are 2305 namespaces listed here[^]. Laugh | :laugh:

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Gerry Schmitz9-Nov-22 20:03

Gerry Schmitz

9-Nov-22 20:03

I just Googled for a number; it returned one big enough to use. I suspect there are "major" ones and "minor" ones. I'll even take your word for it without bothering to check.

Calin Negru8-Nov-22 23:06

.NET Framework versus .NET latest?

8-Nov-22 23:06

Sam, Gerry thanks for feedback

Bruce Greene7-Nov-22 9:59

Bruce Greene

7-Nov-22 9:59

I have a one-man-show small business with a complex, mature and utterly reliable .NET Framework 4.6.1 WPF app and associated libraries, etc. I'm always busy adding requested features and doing customizations for my customers. My question is - how important is it that I drop my income-generating activities and port all of this to the latest .NET 6 or whatever? I would value advice from those who have done this upgrade...

Re: .NET Framework versus .NET latest?

OriginalGriff7-Nov-22 10:39