If statement with several textboxes to get the values from

Question

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Hi guys, am having a problem with my project. wat i want to do is display disable the button if there count is greater than equals to 2. but need to do so if busNumber = txtbusNumber.text and date = txtDay.text and count = txtCount.text.
all this are stored in the database.. i can retrieve them all even the count is working.
this is the code i have so far.

VB

if txtBusNumber.Text = "AT01" And cmbDay.Text = "Monday" And txtCount.Text >= 2 Then
            txtNotification.Text = ""
            btnConfirm.Enabled = False
            txtNotification.Text = "Sorry Bus from " & cmbDepart.Text & " to " & cmbDestination.Text & " is fully booked"
        Else
            btnConfirm.Enabled = True
            txtNotification.Text = "Ticket Available"

        End If

please help.. thanks

Posted 23-Aug-12 0:46am

Member 9254084

Updated 23-Aug-12 1:10am

v4

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3 solutions

Solution 1

I assume this does not compile ? You should use int.TryParse to work out if txtCount.Text is a number, then if it is, you can compare it. I don't understand the rest of your question, is there more you're asking here ? What is busNumber ? If it's a variable, why not compare to it ?

Posted 23-Aug-12 0:50am

Christian Graus

Comments

Member 9254084 23-Aug-12 7:05am

am using init... just want to be able to disable the confirm button if count >=2

Christian Graus 23-Aug-12 7:09am

I still don't get your issue. Is txtCount.Text returning a number ? I don't think it will, and hence your issue. If it is, you don't have an issue, it should work. So, if you have an issue, int.TryParse is the solution

Member 9254084 23-Aug-12 7:15am

ok, the thing is, if i just used :
if txtCount >= 2 then
btnConfirm.enabled = false
end if

it works.. but the moment i want to extend the if statement to include :

if txtCount.text >= 2 AND cmbDay.text = "Monday AND txtBusNumber.text = "AT01"

it wont work... the buttton does not disable

Christian Graus 23-Aug-12 7:18am

Ah, now we get to it. VB.NET is idiotic, so I knew it MIGHT return a number. It may still blow up if there's no number in your textbox. Did you use your debugger to see what was going on ? If you don't know how, you should learn, but MsgBox("-" + cmbDat.text + "-") will show you the text thats being compared, the extra - are to show if the issue is leading or trailing spaces. I recommend doing this : if txtBusNumber.Text.Trim() = "AT01" and cmbDay.text.trim() = "Monday"... This removes trailing spaces that are meaningless to humans, but will stop this comparison from working as you hope

Member 9254084 23-Aug-12 7:15am

txtCount returns a number...

Member 9254084 23-Aug-12 7:27am

tried.. msgbox shows me all text i need... but still cant disable the btnConfirm

Christian Graus 23-Aug-12 7:29am

So there's no leading or trailing spaces ? If the text matches, then the code will work. Ergo, it does not match. Did you add the Trim() methods ?

Member 9254084 23-Aug-12 7:33am

yes, i did add the trim method

Christian Graus 23-Aug-12 7:36am

Then I would break it up like this: if cmbDay.text <> "Monday" MsgBox("cmbDay = " + cmbDay.Text. Do that for each, and find out which one is failing, and what it's value is.

Member 9254084 23-Aug-12 7:35am

so funny coz if i delete the cmbday.text and txtbusNumber, the code works... but if i add the AND __________.., it wont work

Solution 2

you need to replace txtCount.Text >= 2 with "Convert.ToInt32(txtCount.Text) >= 2"

Posted 23-Aug-12 1:06am

Upniwesh

Comments

Christian Graus 23-Aug-12 7:09am

This will blow up if there's no number in txtCount.Text. That's why you always use int.TryParse

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Member 9254084 · Accepted Answer · 2012-08-23T03:46:00

Dim count As Integer
count = Convert.ToInt32(txtCount.Text)
If (count >= 3) And cmbDay.Text = "Monday" And txtBusNumber.Text = "AT02" Then
btnConfirm.Enabled = False

txtNotification.Text = "Bus Fully Booked"

End If

not under init, but under command