[LordAizen]

I'm trying to create a simple program for my computing class but i'm having a lot of trouble getting this to work after putting a lot of time into looking into other peoples problems which are similar to my own I haven't found a solution.

 Lbl_output1.Text = Result1
        Lbl_ouput2.Text = Result2

        Dim intcounter As Integer = 1

        If Cbx_Squared.CheckState = CheckState.Checked Then
            Do Until intcounter = 11

                Txt_ouput.Text = (intcounter * intcounter)
                Txt_ouput.Text += Environment.NewLine

                intcounter = intcounter + 1

            Loop
        End If

I'm trying to get it so that each time the loop resolves it puts the value onto a new line of the text box, the output simply being the squared number of 1-10 on different lines. I have tried + vbcrlf and + environment.newline after the intcounter * intcounter, getting the error cannot convert from string to double. This currently has no errors but only outputs 100 on the first line.
Thank you.

[lucky3]

In your Do Until ... Loop, you are now doing:

• assign to .Text property of Txt_ouput the value of current intcounter value on the power of 2 ( 2 * 2 = 2 ^2 as is 3 * 3 = 3^2)
  
• then add newline to the same .Text property
  
• you increment intcounter by one
  
• and you loop

What you should be doing is:
add to .Text property of Txt_output the value...
... and everything else as before.

[LordAizen]

Sorry i'm a novice at VB we've just started the course how does one add to a text box?
Thank you for your input already. =]

[lucky3]

As you add newline to what you already added in your code at line 10.

This post has been edited by lucky3: 11 October 2012 - 01:15 PM

[LordAizen]

If you mean by using += then I just tried that I got the cannot convert from string to double error again.

I'm sorry thank you again.

[CharlieMay]

The & is used to concatenate string. Sometimes, + can try to perform calculation.

[lucky3]

So you have Option Strict On set by default, and that is the reason. Keep it that way, you'll learn more. What you need to do, is add .ToString() behind (intcounter * intcounter), so it looks like: (intcounter * intcounter).ToString(). And instead of +=, use &= when dealing with strings. With Option Strict On, there should be no trouble using +=, but if you ever decide to switch it off, you could find yourself doing mathematical addition, instead of concatenating text.

[LordAizen]

Most thanks kind sir it worked. Many hours spent are now to an end thanks so much.
you don't know how happy I am.

[DimitriV]

You could use &=, you could add a line by saying: TextBox1.Text &= Chr(13).
Wow. Beaten to it.

This post has been edited by DimitriV: 11 October 2012 - 01:26 PM

[LordAizen]

Thank you both for your help really.

[lucky3]

DimitriV perhaps Txt_ouput.Text &= ChrW(13) & ChrW(10), but not to confuse OP: vbNewLine is most used for adding new line in VB.NET.

[CharlieMay]

Environment.Newline for when you don't want to use the VisualBasic namespace too.

[AdamSpeight2008]

Environment.NewLine is the best since a newline is culture dependent.

This post has been edited by AdamSpeight2008: 11 October 2012 - 03:33 PM