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[VB]Value of?...

 
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raidos
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PostPosted: Wed Apr 30, 2008 10:28 pm    Post subject: [VB]Value of?... Reply with quote
Sorry for such a newbie question but, how would you input the state "value of" (if it even exist). I want to have the value of textbox1 and textbox2 added together. Is that possible? Thanks in advance.
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Snootae
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PostPosted: Wed Apr 30, 2008 10:52 pm    Post subject: Reply with quote
you mine adding the text of two textboxes

if they contain strings just do

Code:
String = TextBox1.text + TextBox2.text


if they have only numbers

Code:
Numbers = StrToInt(TextBox1.text) + StrToIntTextBox2.text

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raidos
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PostPosted: Wed Apr 30, 2008 10:55 pm    Post subject: Reply with quote
Ah dang forgot to mention that I want the value of textbox1 + textbox2 to be inputted into textbox3. And yeah I'm only dealing with numbers right now.
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Snootae
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PostPosted: Wed Apr 30, 2008 11:36 pm    Post subject: Reply with quote
thats easy then

TextBox3.text = TextBox1.text + TextBox2.text
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raidos
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PostPosted: Thu May 01, 2008 5:13 pm    Post subject: Reply with quote
Snootae wrote:
thats easy then

TextBox3.text = TextBox1.text + TextBox2.text


Thanks for the reply, I tried that first thing I did and nothing shows up in the 3rd textbox.

This is what I have so fare.



Code:
Public Class Form1
    Dim Y As Integer
    Dim X As Integer
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        X = 100
        TextBox1.Text = X
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Y = 200
        TextBox2.Text = Y
    End Sub

    Private Sub TextBox3_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox3.TextChanged
        TextBox3.Text = TextBox1.Text + TextBox2.Text



    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

    End Sub
End Class



Edit1: Hmm It seems that just adding a button solved everything so now I just have to click the button to see the numbers show up but I have a new problem now. It shows up as 100200 where its supposed to be 300. the two text box's are 100 and 200. Any ideas?
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HalfPrime
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PostPosted: Thu May 01, 2008 6:09 pm    Post subject: Reply with quote
when you add 2 test strings, "text1" and "text2", it'll do "text1text2". You want to add them as ints.
[code]
textbox1.text = IntToStr(StrToInt(textbox1.text)+StrToInt(textbox1.text))
[code]
I don't do vb, so I don't know if the inttostr is necessary.

Also, the reason textbox3 is blank is probably because you don't set it to text1+text2 after you get the input. (Until you put in the button.)
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Snootae
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PostPosted: Thu May 01, 2008 7:29 pm    Post subject: Reply with quote
it maybe a good idea to store the textboxes as you x and y values so:

Code:
X = StrToInt(TextBox1.text)
Y = StrToInt(TextBox2.text)


then

Code:
TextBox3.text = IntToStr(X + Y)


if not then

Code:
TextBox3.text = IntToStr( StrToInt(TextBox1.text) + StrToInt(TextBox2.text) )


also, i think i know why your code didn't work, because you tried to add a click handler to your textbox, but vb makes it into TextChanged, try typing i 1 in that box and it should change to 300
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raidos
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PostPosted: Thu May 01, 2008 7:54 pm    Post subject: Reply with quote
IntToStr is not declared, what is it suppose to be? Dim IntToStr As integer?
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lurc
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PostPosted: Thu May 01, 2008 8:15 pm    Post subject: Reply with quote
raidos wrote:
IntToStr is not declared, what is it suppose to be? Dim IntToStr As integer?


use Convert.ToString and Convert.ToInt32
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raidos
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PostPosted: Thu May 01, 2008 8:47 pm    Post subject: Reply with quote
Code:
Public Class Form1
    Dim Sum As String
    Dim Y As Integer
    Dim X As Integer
    Private Sub Main(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        X = Convert.ToInt32(TextBox1.text)
        Y = Convert.ToInt32(TextBox2.text)
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        TextBox1.Text = 100
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        TextBox2.Text = 200
    End Sub

    Private Sub TextBox3_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox3.TextChanged
        TextBox3.Text = Convert.ToString(X + Y)
    End Sub


    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        TextBox3.Text = Convert.ToString(X + Y)
    End Sub
End Class


My new code. When I try to run it, it gives me this error "Input string was not in correct format". at X = Convert.ToInt32(TextBox1.text)
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lurc
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PostPosted: Thu May 01, 2008 8:58 pm    Post subject: Reply with quote
Um... woudn't you want to get the values AFTER everythings inputted?
like have button_3 get the X and Y value... even better you could have it all in one line

TextBox3.Text = Convert.ToString(Convert.ToInt32(TextBox1.text) + Convert.ToInt32(TextBox2.text))

If that doesnt work try

Convert.ToSingle
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HalfPrime
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PostPosted: Thu May 01, 2008 9:01 pm    Post subject: Reply with quote
Did you try it without inttostr?
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raidos
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PostPosted: Thu May 01, 2008 9:15 pm    Post subject: Reply with quote
Yeah my above code does not have any inttostr in it.

Edit: Holy all I had to do was remove

X = Convert.ToInt32(TextBox1.Text)
Y = Convert.ToInt32(TextBox2.Text)

Thanks a lot guys with all the help.
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hcavolsdsadgadsg
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PostPosted: Thu May 01, 2008 10:07 pm    Post subject: Reply with quote
The .NET version of VB usually tries to do the type conversion on it's own if I remember right...
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