Question

I have a int array with for example {1,2,3,4} value.

I want to put this numbers into, for example, my list box like this :

listBox2.Items.Add("After Inserting (" + page[i].ToString() + ')' + <use all my numbers like this : 1234 here>+"Page Fault = " + pf.ToString());  

Output :

After Inserting (3) 1234 page fault = 5

1234 is just an example. My array is much bigger.

How can I do that in c#?

Answer 1

You can use String.Join (actually the IEnumerable<T> overload is taken):

String joined = String.Join("", yourArray); 

i’m new in c# how i dont know how place the string among the text

You can use String.Format to build the text and to increase readability:

var inserted = page[i].ToString();
var allInserted = String.Join("", yourArray);
var pageFault = pf.ToString();
var itemText = String.Format("After Inserting ({0}) {1} page fault = {2}"
                             ,inserted, allInserted, pageFault);
listBox2.Items.Add(itemText);

Edit 2:

can i replace some Character instead one number in array? my array :
{1,2,3,4,-1″} output : 1,2,3,4,empty

Yes, you can replace the output:

String.Join("", yourArray.Where(i => i != -1));

Edit 3:

i understand how i can exclude -1 but i didn’t understand how i can
replace something with that…like “empty” instead -1

Here we go …

String.Join(", ", intArray.Select(i => i == -1 ? "empty" : i.ToString()));