How to display value from TextBox into a MessageBox in VB.NET?

Question

I honestly don't know what I'm doing wrong. I have a textbox named "txtNumSticks" where the user enters a number. After the user hits start, I want a message box to pop up that says "Okay! We'll play with (x) sticks!" But I can't get it to work. First day learning VB.net. Thanks in advance!

Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click
    Dim NumSticks As String
    txtNumSticks.Text = NumSticks
    Game.Show()
    Me.Close()
    MessageBox.Show("Okay! We'll play with " & NumSticks & "sticks!")
End Sub

Jay · Accepted Answer · 2015-02-04 23:16:03Z

4

You are setting the variable the wrong way around you should be assigning NumSticks to the value in the text box so:

NumSticks = txtNumSticks.Text

or alternatively without the use of a variable

MessageBox.Show("Okay! We'll play with " & txtNumSticks.Text & "sticks!")

edited Feb 4, 2015 at 23:16

answered Feb 4, 2015 at 21:46

Jay

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3 Comments

Abtra16 Over a year ago

Thank you! Switching the variable assignment worked! However, I also tried the second way you showed me without the variable, but it didn't work. Any idea why that wouldn't work? It just says, "Okay! We'll play with sticks!"

HKImpact Over a year ago

NumSticks = txtNumSticks.Text.ToString

Andrew Morton Over a year ago

txtNumSticks.Text does not need .ToString() applied to it as it is already a string.

HKImpact · Accepted Answer · 2015-02-04 21:56:16Z

3

You may want to add a little bit of error checking in your program to make sure your value entered is Numeric.

    Dim NumSticks As String

    NumSticks = txtNumSticks.Text.ToString

    If IsNumeric(NumSticks) Then
        Game.Show()
        MessageBox.Show("Okay! We'll play with " & NumSticks & " sticks!")
        Me.Close()

    Else
        ' Let user know the value is non-numeric
        MessageBox.Show("Non Numeric Value entered", "Error!", _
                        MessageBoxButtons.OK, MessageBoxIcon.Error)
        Exit Sub

    End If

answered Feb 4, 2015 at 21:56

HKImpact

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2 Comments

Abtra16 Over a year ago

Awesome! I was actually just figuring out a way to do that too!

HKImpact Over a year ago

You should try getting familiar with Try..Parse..Catch..Finally as well. This with added logging saves so many headaches trying to solve where your code went wrong.

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