Validation of userinput

[rwarren1]

What is the best way to validate a users input? I need to validate a "Name" entered in a textbox, as well as an enetered "Score". Could someone please help me with this.

[debasisdas]

you need to write a function for the purpose with all the validation logic implemented.

[rwarren1]

@debasisdas
Thank you for your reply. Could you give me an idea of how to write the function?What I have is:

Private Sub txtNewName_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles textNewName.Validating
 
  If Not (txtNewName.Text Like "A-Za-z") Then
    e.Cancel = True
 
    txtNewName.Select(0, txtNewName.Text.Length)
 
MessageBox.Show (txtNewName, "Invalid name")
  End If
End Sub

[vb5prgrmr]

Wrong forum, you need to be in the VB.NET forum...

[Frinavale]

Are you developing an ASP.NET MVC web application?

[rwarren1]

@Frinavale
I was told I need to be in VB.Net forum. I am developing a program in visual studio 2008. Thanks

[rwarren1]

I'm not sure if this is the correct code to use for validating user input. Would someone correct me please. Thank you.

Private Sub txtNewName_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles textNewName.Validating
 
  If Not (txtNewName.Text Like "A-Za-z") Then
    e.Cancel = True
 
    txtNewName.Select(0, txtNewName.Text.Length)
 
MessageBox.Show (txtNewName, "Invalid name")
  End If
End Sub

[Frinavale]

When you created the project that you're working on....did you create it as an MVC ASP.NET project or did you create it as a normal ASP.NET application/website?

I suggest you create a class that you can use to validate your user input with.
For example:

Class myValidation 
 
  Public Shared Function UserNameIsValid(ByVal userName As String)
    Dim isValid As Boolean =  False
    If (someRequirementsAreMet) Then
      isValid = True
    End If
 
    Return isValid
  End Function
 
'...other functions
End Class
 

Now, when the user tries to submit the data to be saved you can validate the data before you actually save it.

In your page code you would have:

  'In Button Click event:
  If (myValidation.UserNameIsValid(txt_username.Text) AndAlso ...other validation Then
    'update database or whatever you need to do
  Else
    'indicate to the user that there were errors.
  End If
 

-Frinny

[tlhintoq]

rWarren1: You have started 4 separate threads for this same topic/issue. Please stop doing that. It makes it hard to coordinate efforts to help you.

[]I was told I need to be in VB.Net forum. I am developing a program in visual studio 2008. [/]

Thanks Visual Studio supports several different programming languages. There are forums here for each language: C-Sharp, Visual Basic, Visual C++ and so on. In the future you need to post your questions in the correct forum if you expect the most experienced people to see them so they can help you.