Find the sum of 5 numbers entered by the user with 1 textbox and 1 button

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I need to find the sum of 5 nos. entered by the user, with only 1 textbox and 1 button, everytime I input a no. in the textbox, I also click the button, then clear the textbox and repeat the process until I have input 5 nos, the 5th and last time I clicked the button, the msgbox will show the sum of 5 nos. entered by the user, and will not be able to input another no. because the textbox will not be visible because the limit is reached only until 5 times, what is the vb .net code for this problem? Using if-then conditional statements and/or while loop only.

What I have tried:

Dim s, i, n As Integer
s = 0
i = 0
n = TextBox1.Text

If i < 5 Then
i = i + 1
sum = sum + n
Msgbox("The sum is : " & sum)
End If

End Sub
End Class

But its not really working. Incomplete.

Posted 12-Sep-17 4:14am

Member 13406062

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Comments

Ralf Meier 12-Sep-17 10:41am

This could not work because this isn't a code which could work ...
All you have to code is to do what you have described ... The action must come from the Button.Click-Event.
Perhaps you try it with that ...

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Graeme_Grant · Answer 1 · 2017-09-12T04:47:00

Below is a working example based on the requirements outlined. Notice that the names that I give controls and variables make the code very easy to read.

VB

Public Class Form1

    Private Total As Integer
    Private Count As Integer
    Private MaxEntries As Integer = 5

    Private Sub ButAdd_Click(sender As Object, e As EventArgs) Handles ButAdd.Click

        If String.IsNullOrEmpty(txtInput.Text.Trim) Then Return

        Dim Value As Integer

        If Integer.TryParse(txtInput.Text, Value) Then

            If Count < MaxEntries Then
                Count += 1
                Total += Value
                labTotal.Text = Total.ToString
            Else
                txtInput.Enabled = False
            End If

        End If

        txtInput.ResetText()
        txtInput.Select()

    End Sub

End Class