WinCE 6.0 Native Exception when String Array more than 10000 row loaded

Question

Hi Guys;

I am developing a software for Ingenico IPA280. It has Wince 6.0 on it and using CF 3.5 and Sql Compact database.

Normally program runs smooth without an exception. When I added code below, it starts to fire native exception at "this.Close()" or "this.Hide()" kinds of methods (WinForm based methods). Entire code blocks are under try catch blocks. Non of them catches anything (Becasue it is native exception). With taskmanager i am seeing 46mb free memory, so there is no shortage of memory.

 I have 2 question:

1- How can i find underlying problem?

2- Why i get native exception and how to correct it?

Exception Message Box:

Application Error

Application <Application Name> encountered a serious error and must shutdown.

Code Block: (Randomly  generating 10000 strings and assining to a string[] or List<string> array. Then I am using for search)  Please do not suggest alternative search methods, i am currious about how to handle and solve the problem

blackList = new List<string>(); // I tried string[] array too. Nothing changed
                Random rndThsnd = new Random();
                Random rndLast = new Random();
                for (int j = 0; j < lenBlck; ++j)
                {
                    string cardBase = "1111 2222 3333 44";
                    string thsnd = rndThsnd.Next(10, 99).ToString();
                    string lstPart = rndLast.Next(1001, 9999).ToString();
                    string whlBlackCard = cardBase + thsnd + " " + lstPart;
                    blackList.Add(whlBlackCard);
                }

Thanks.

Answer 1

Hello,

In the managed codes, we can use try-catch block to get the exception. We can use it when we try to connect or open the database.

Also, some exception thrown by the native code. You can use GetLastError() function to catch them. But in the managed codes we need to p/Invoke this API, like this
http://www.pinvoke.net/default.aspx/coredll.getlasterror

Best regards,
Jesse

---

Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Hi Jesse;

I am using try/catch blocks everywhere but they are not catching the exception. At debug mode, i am going step by step (with F10) when i reacehed this.Hide(), this.Close() winform methods (These have try/catch block too.), debuging stops immediately. Program shutdowns too . Showing no exceptiond detail. Only message i get the error screen on the mobile device. Taht is:

Mobile Device Error Form Text: Application Error

Mobile Device Error Form Inside: Application <Application Name> encountered a serious error and must shutdown.

try{

this.Close() //Boom. Debug stops. If i put "GetLastError()" after here, i can not see anything

}catch(Exception ex) //Does not step in here....

{

If i put "GetLastError()" here, it is not catching any exception. I have already got messagebox and logwriter functions here

}

So i have nothing about about exception (IO, OutOfIndex, Memory...). I have no clue. If I comment out 10000 rows load, everything works fine.

Any suggestions?