[RESOLVED] Text validation help

[_ivo_]

Visual Web Developer 2010 Express
This is an ASP.net project

I have searched but wasn't successful

I have two text boxes and I need to make small calculator.
I have made one "IF" for checking is there something in textboxes, if they are empty then I get message that I didn't insert anything.

And if I insert numbers then I get the result.
This is ok.

I have a problem with validation

I need ONLY numbers to be inserted, if I insert something that is not integer I need a message that this is not a number.

Please, hlp.

This is my code :

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

        If TextBox1.Text = ("") Or TextBox2.Text = ("") Then
            Label5.Text = ("Niste unjeli dva broja, pokusajte ponovo")
        Else
            Dim prvi As Integer = TextBox1.Text
            Dim drugi As Integer = TextBox2.Text
            Label5.Text = (prvi + drugi)
        End If

    End Sub

[avrail]

hay,
you can use RegularExpressions to do such thing

Dim numericReg As New Regex("^[\d]*$")
If numericReg.IsMatch("12345") Then
        // the match done 
	Return True
Else
//  there is no match 
/// add the message that you want 
	Return False
End If

[_ivo_]

Hm... Really sorry but I don't know how to implement this in my code, I didn't use this till now

[avrail]

ok,

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

        If TextBox1.Text = ("") Or TextBox2.Text = ("") Then
            Label5.Text = ("Niste unjeli dva broja, pokusajte ponovo")
        Else
            Dim numericReg As New System.Text.RegularExpressions.Regex("^[\d]*$")
             If numericReg.IsMatch(TextBox1.Text) AndAlso numericReg.IsMatch(TextBox2.Text) Then
               Dim prvi As Integer = TextBox1.Text
               Dim drugi As Integer = TextBox2.Text
               Label5.Text = (prvi + drugi)
              Else
              Label5.Text = "please enter numbers"
             End If
            
        End If

    End Sub

i think this will make it for you

[avrail]

but really i don't know if this was right or not

Dim drugi As Integer = TextBox2.Text

if it was right then the code will work fine.

[_ivo_]

Thanks so much, this works great and now I have an example, thanks!

[avrail]

glad to hear this,
if you want to learn more about RegularExpressions

http://gskinner.com/RegExr/

[_ivo_]

but really i don't know if this was right or not

Dim drugi As Integer = TextBox2.Text

if it was right then the code will work fine.

yes, it is correct because I need two numbers

thanks for the link!

[avrail]

ok, great i was just want to check if it was right or wrong
you can check if the numbers was 2 digits or not
use this

System.Text.RegularExpressions.Regex("^[\d]{2}$")

[_ivo_]

ok, great i was just want to check if it was right or wrong
you can check if the numbers was 2 digits or not
use this

System.Text.RegularExpressions.Regex("^[\d]{2}$")

thanks

[gep13]

Hey,

You might want to think about using the built in controls for this, i.e:

http://msdn.microsoft.com/en-us/library/bwd43d0x.aspx

That way you will get validation both on the client side, and the server side.

Gary