How Can I Get The Sum

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i'm using visual studio 2015,window form app with VB code
i have a list of values in the listbox,so what i want is when the values(multiple values) selected,it adds the values & display in textbox

Posted 20-Nov-15 3:15am

Member 12155493

Updated 20-Nov-15 3:23am

F-ES Sitecore

v3

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phil.o 20-Nov-15 9:24am

What have you tried so far?

Patrice T 20-Nov-15 13:07pm

What have done so far ? Where are you stuck ?

3 solutions

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OriginalGriff · Answer 1 · 2015-11-20T04:05:00

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

If you meet a specific problem, then please ask about that and we will do our best to help. But we aren't going to do it all for you!

I'll give you a hint: look at int.TryParse (or double.TryParse for floating point inputs) and it will let you convert user entered values to a number so you can add them. You can then use ToString or String.Format to convert the value back to a string for display.

Krunal Rohit · Answer 2 · 2015-11-20T04:42:00

C#

int n = 0, i;
foreach (var item in listBox1.SelectedItems)
{
    bool result = Int32.TryParse(item, out i);
    if(result)
    {
        n += i;
    }
}
txtBox.Text = n + "";

Not tested, but should work :)

Update - VB .net code

C#

Dim n As Integer = 0, i As Integer
For Each item As var In listBox1.SelectedItems
	Dim result As Boolean = Int32.TryParse(item, i)
	If result Then
		n += i
	End If
Next
txtBox.Text = n + ""

-KR

Maciej Los · Answer 3 · 2015-11-20T05:41:00

Solution 3

Something like that:

VB

TextBox.Text = ListBox1.SelectedItems.Cast(Of Double)().Sum().ToString()

should work as well!

Posted 20-Nov-15 5:41am

Maciej Los

How Can I Get The Sum

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