problem with sum the value

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VB

How I can sum all value that shows the size of the files in listbox1?
Give me some examples.
Thank You.

Posted 24-Aug-13 8:37am

Pouya Mozafar

Updated 24-Aug-13 8:38am

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Mahesh Bailwal · Accepted Answer · 2013-08-24T08:46:00

Solution 1

VB

Dim total as Int
For l_index As Integer = 0 To listbox1.Items.Count - 1
    total  = total + Convert.toInt32(listbox1.Items(l_index))
Next

Posted 24-Aug-13 8:46am

Mahesh Bailwal

Comments

Pouya Mozafar 24-Aug-13 14:51pm

What is dim total as int?
Is int ,integer?
If it is integer this error shows for " total = total + Convert.toInt32(listbox1.Items(l_index))"
Error:
Input string was not in a correct format.

Mahesh Bailwal 25-Aug-13 1:33am

Sorry, It should be Integer instead of Int.
About other problem your facing, in the question you have mentioned "sum all value that shows the size of the files in listbox1" based on that I provided solution best to my knowledge.Too to get correct answer you must provide all the information in the question including code snippet, other wise answers are given on assumption which may not be right.

Please click on "Improve question" link and update your question with relevant information.

ledtech3 25-Aug-13 0:01am

you seem to be missing some information from your question.

Your question reads to me that you are getting a list of file with the size of them output into a listbox.

Answer #1 is attempting to give you a total amount of items in your listbox but not sure why they are tying it that way.

To get the number of items in a listbox just do.
Dim TotalItems As Integer
TotalItems = ListBox1.Items.Count
Label1.Text = TotalItems.ToString

Pouya Mozafar 25-Aug-13 3:07am

How I can sum the size of 4 or more items in list box?
I need the total size of the listbox1.items .

Mahesh Bailwal 25-Aug-13 3:18am

please provide example of what your listbox contains.

Pouya Mozafar 25-Aug-13 3:35am

my list box contains some files that user can attach. i wanna show the total size of this files.

Mahesh Bailwal 25-Aug-13 3:52am

Please follow below link for getting file size

http://msdn.microsoft.com/en-us/library/system.io.fileinfo.length.aspx

Pouya Mozafar 25-Aug-13 3:58am

Thanks,I solved it.

Mahesh Bailwal 25-Aug-13 4:01am

you're welcome.