Managed C++/CLI

31-Jul-07 10:08

Hi,

I would create a table who every cas was : array < String ^, 2 > ^ tab=gcnew array < String ^, 2 > (20, 200);

i try for array < String ^, 3 > ^ tab=gcnew array < String ^, 3 > (20, 200);, i can't make : tab[1][2]= subItems when array<string^>^ subItems=gcnew array<string^>(16);

Thank you verry mutch

Mark Salsbery31-Jul-07 10:30

31-Jul-07 10:30

I don't understand what you're trying to do, but I see right away that you're trying to create a 3 dimension array
with only two arguments in the constructor.

What happened to our previous thread? I thought you needed an array of arrays...

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

abbd31-Jul-07 10:35

31-Jul-07 10:35

Hi,

they are always an exception, how i can add in table of arrays, i do : tab[i][j]=Subitem;

Thank you verry mutch

Mark Salsbery31-Jul-07 10:40

31-Jul-07 10:40

tab needs to be defined to hold the type that subitem is. You didn't show what subitem is in your first post.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

abbd31-Jul-07 10:54

31-Jul-07 10:54

the definition of subItem was array^ subItems=gcnew array(16);,

Mark Salsbery31-Jul-07 11:35

31-Jul-07 11:35

That's not valid. Your arrays need to have a type.

What do you want to do?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Mark Salsbery31-Jul-07 11:49

31-Jul-07 11:49

abbd wrote:
array < String ^, 3 > ^ sub2=gcnew array < String ^, 3 > (20,100,200);

array^ subItems=gcnew array(16);

sub2[0,0] = subItems

You have a bunch of things wrong here. Do you have an understanding of C++ arrays?
They are strongly typed, like the whole language is.

To define an array you have to specify a type - this won't work:
array^ subItems=gcnew array(16);

Now to add this array type to your multi-dimension array, that multidimensioned array must be defined to hold an array type -
the type of subItems, which you haven't defined.

If you have an array with three dimensions then you must access members of the array using three arguments.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

iddqd51531-Jul-07 11:05

iddqd515

31-Jul-07 11:05

you've created a rectangular multidimensional array rather than a jagged one. As such, you need to access elements like this tab[i,j] rather than tab[i][j] (which you would do for a jagged array in C++/CLI)

abbd31-Jul-07 11:44

31-Jul-07 11:44

i try for :

array < String ^, 3 > ^ sub2=gcnew array < String ^, 3 > (20,100,200);

array<string^>^ subItems=gcnew array<string^>(16);

subItems[0]="1";
subItems[1]="2";
.
.
subItems[15]="14";

sub2[0,0] = subItems

but they are an error : Error 80 error C3262: invalid array indexing: 1 dimension(s) specified for 3-dimensional 'cli::array<type,dimension> ^'

Thank's

Re: reading a file using C

George L. Jackson31-Jul-07 13:54

George L. Jackson

31-Jul-07 13:54

Are you trying to do something like this:

	array<array<String^>^, 3>^ sub2 = 
		gcnew array<array<String^>^,3>(10, 10, 10);
 
	array<String^>^ subitems = gcnew array<String^>(15);
 
	subitems[0] = "one";
	subitems[1] = "two";
 
	sub2[0, 0, 0] = subitems;
	 
	Console::WriteLine(sub2[0, 0, 0][0]);

"We make a living by what we get, we make a life by what we give." --Winston Churchill

reading a file using C

NalBH31-Jul-07 9:00

NalBH

31-Jul-07 9:00

Hello everybody,

I apologise if i am in the wrong forum.I am posting a question C

I want to read a file using c Coding and i want to store the data in an array like unsigned char data[] and i want then to calculate the data_length

can anyone please help me

thanks\

Nal

Mark Salsbery31-Jul-07 9:14

Re: reading a file using C

31-Jul-07 9:14

NalBH wrote:
I apologise if i am in the wrong forum.

Accepted. You should post here: Visual C++/MFC[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

romcab31-Jul-07 20:49

romcab

31-Jul-07 20:49

Hello,

Maybe you can try this one:
FILE *fp; //file handler

//open the file
fp = fopen(filename, "r"); //check for mode "rb" if binary

//read the file and save to buffer
i = 0;
while (fget(buffer[i], SIZE-1, fp) != NULL)
i++;
fclose(fp); //close the file

I have'nt compile it but this is the algorithm and steps.

Hope this will help.

dfdf

Re: reading a file using C

NalBH2-Aug-07 3:22

NalBH

2-Aug-07 3:22

Hello
thanks for replying.But where is the array where the data file has been stored.Can i call fget(buffer[i], SIZE-1, fp ) again in my code.How can i call the data in the file.And is SIZE the size of the file.It has not been defined.i have this peace of code but it doesnt seems to work.
Please help

Thanks

Nal

An exception on listView

abbd30-Jul-07 21:19

Re: An exception on listView

30-Jul-07 21:19

Hi,

What does mean

- the easy way is have every Control be handled by the GUI thread, which
could mean, use a Forms.Timer, since that executes its Tick handler on the
GUI thread. The drawback is, if the Tick handler takes too long, your GUI
responsiveness will suffer

i have an exception when i use listview whith thread:

An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

Additional information: Cross-thread operation not valid: Control 'listView2' accessed from a thread other than the thread it was created on.

Please help me de resolve this great problem,

Thank you,

Luc Pattyn30-Jul-07 23:30

Luc Pattyn

30-Jul-07 23:30

abbd wrote:
the easy way is have every Control be handled by the GUI thread, which
could mean, use a Forms.Timer, since that executes its Tick handler on the
GUI thread. The drawback is, if the Tick handler takes too long, your GUI
responsiveness will suffer

That's quite correct.

And here is the explanation with the remedy:
http://www.codeproject.com/script/comments/forums.asp?msg=2155450&forumid=3785#xx2155450xx[^]

Did you read up on Control.InvokeRequired and Control.Invoke() by now ?

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Re: An exception on listView

abbd31-Jul-07 5:10