CODEWITHSUNDEEP
vb.net
George woodster
George woodster

Reputation: 11

Is there a way I can assign every single textbox in a form to a single variable?

txtRound.Text
txtDaysWorked.Text
txtPerGallon.Text
txtGasCost.Text
txtMaint.Text
txtParking.Text
txtInsure.Text

I have all these textboxes in a vb form and instead of checking every single one to make sure they are all positive numbers I want a more efficient way of checking them with one variable. Once that variable is declared I'll just go like this 

If (dblVariable > 0) Then

A lot easier than a long list of checking

Upvotes: 1

Views: 42

Answers (3)

Ash Burlaczenko
Ash Burlaczenko

Reputation: 25475

Your form has a Controls properties which is a list of all controls on that form.

You can loop through each control and check it is a TextBox, and if so set it's Text property.

If LINQ is available you could simplify this to

For Each control In myForm.Controls.OfType<TextBox>()
    control.Text = "My Value"
Next

Re-read the question, the title is a bit misleading, but I get what you're asking now.

Again, assuming LINQ is available you should use the .All extension.

If Me.Controls.OfType(Of TextBox)().All(Function(x) Convert.ToDouble(x.Text) > 0) Then
    ' Do something
End If

Upvotes: 5

Ed_
Ed_

Reputation: 1117

You could have a function which takes the list of TextBoxes:

Private Function CheckValues(txt As TextBox()) As Boolean
  For Each member In txt 
     If not String.IsNullOrWhiteSpace(member.Text) Then
         Dim number As Integer = CInt(member.Text)
         If number < 0 Then
            Return False 

   Next
   Return true 'all positives
End Function

And then call it like this:

 If CheckValues(new TextBox(){txtRound, txtDaysWorked}) Then
      'case true
  Else
      'case false
  End If

Upvotes: 0

CyberneticianDave
CyberneticianDave

Reputation: 162

This is going to be a vague answer, because I'm working from memory, but here's my best attempt.

In short, I don't think so. If you want to check one variable you're going to have to generate that variable yourself. You could do this client-side.

Alternatively, if all of these controls are within a single form or something, you might be able to cycle through each control in a loop to check each one.

Upvotes: 0

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