ListView - Items->Append in for loop

Question

hello,

i am trying to append items to a ListView using a for-loop like this:

	if ( passvault.vector_size() > 0) {
		int p(0);
		for( p; p < passvault.vector_size(); p++ );
		{
			ListView_Connections->Items->Append( passvault.get_resource(p-1) ); 
		}
	}

but I only get one Item appended, even if there are more elements in the vector. Does I have to do something special when using Items->Append within a for loop.

Thanks in advance!

br

David

Answer 1

Nothing special from the Append side. If you trace through the code do you see Append called for all of the items?

--Rob

Answer 2

i also tried this code so that i can get sure that Append is executed multiple times...

		for( int x = 0; x <= 10; x++ );
		{
			ListView_Connections->Items->Append( "test" ); 
			
		}

But even here, i only get one Item.

If you put in 

ListView_Connections->Items->Append( "test" );
ListView_Connections->Items->Append( "test" );
ListView_Connections->Items->Append( "test" );

i get the three items...

this is kind of strange...

Answer 3

Like Rob said, make sure that Append is really being called the number of time you expect it to be. Also, why are you initializing p outside of the for loop and why are you decrementing it's value by 1 in get_resource()? That would make the initial value -1. That just looks odd to me.

Answer 4

i am running this code in 

MainPage::MainPage()
{
	InitializeComponent();
...
}

i hope someone can give me a hint. thanks!

br

Answer 5

-1 because passvault.get_resource is returing a vector element (so it needs to start at 0).

if i use this code...

for( int p(0); p < passvault.vector_size(); p++ );

i get an error that p is not defined for the following line...

ListView_Connections->Items->Append( passvault.get_resource(p-1) ); 

thanks

Answer 6

The problem is you are ending your for loop with ;

This terminates the statement and p is out of scope for subsequent references. In your original code, what you thought was the loop block only gets executed once - it increments p to 1 and then calls Append only once.

Should be:

		for( int p=0; p < passvault.vector_size(); p++ )
		{
			ListView_Connections->Items->Append( passvault.get_resource(p) ); 
		}
	

Answer 7

thanks!

little mistakes make big problems ;)

maybe i should go to sleep... it´s nearly 11pm at my site.

thanks a lot!