Handling empty fields

[Xero]

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After
entering the numbers, they should click a button called 'Display Results'.
How can I display a dialog box prompting the users to check their entry if
they left any of the boxes empty? I have tried the .IsNaN function but in
vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Peter Proost]

Hi,

check if isnumeric(textb ox.text)
or for the length you could check textbox.text.le ngth > 0
or combine them

hth
Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F8******** *************** ***********@mic rosoft.com...

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After
entering the numbers, they should click a button called 'Display Results'.
How can I display a dialog box prompting the users to check their entry if
they left any of the boxes empty? I have tried the .IsNaN function but in
vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Cor Ligthert]

Xero,

To show the result from Peters actions when not
messagebox.show ("You should enter something")

I hope this helps?

Cor
"Xero" <jeff@chezjeff( REMOVE).net>
....

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After
entering the numbers, they should click a button called 'Display Results'.
How can I display a dialog box prompting the users to check their entry if
they left any of the boxes empty? I have tried the .IsNaN function but in
vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Xero]

I see. Thanks very much.

"Peter Proost" wrote:

Hi,

check if isnumeric(textb ox.text)
or for the length you could check textbox.text.le ngth > 0
or combine them

hth
Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F8******** *************** ***********@mic rosoft.com...

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After
entering the numbers, they should click a button called 'Display Results'.
How can I display a dialog box prompting the users to check their entry if
they left any of the boxes empty? I have tried the .IsNaN function but in
vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Xero]

Eh ... sorry, I still have some problem ...
I copied the line of code but it didn't work out.

Could you post the exact line of code? I want to display the message 'One of
the boxes is empty.' if any of the two boxes named as 'num1' and 'num2' is
left empty. Thanks again.

"Peter Proost" wrote:

Hi,

check if isnumeric(textb ox.text)
or for the length you could check textbox.text.le ngth > 0
or combine them

hth
Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F8******** *************** ***********@mic rosoft.com...

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After
entering the numbers, they should click a button called 'Display Results'.
How can I display a dialog box prompting the users to check their entry if
they left any of the boxes empty? I have tried the .IsNaN function but in
vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Peter Proost]

Here are 2 possible pieces of code, place it behind the click event of a
button, or where you want to check the textboxes

<<<<<<<code 1>>>>>>

If Not IsNumeric(num1. Text) Or Not IsNumeric(num2. Text) Then
MsgBox("one of the boxes is empty")
End If

<<<<<<code 1>>>>>>

<<<<<<code 2>>>>>>

Dim blnOk As Boolean
If Not IsNumeric(num1. Text) Then
blnOk = False
MsgBox("Box one is empty")
Else
blnOk = True
End If
If Not IsNumeric(num2. Text) Then
blnOk = False
MsgBox("Box two is empty")
Else
blnOk = True
End If

If blnOk Then
'execute the rest of the code
MsgBox("They're both filled")
End If

<<<<<<code 2>>>>>>>>

greetz Peter

"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:C0******** *************** ***********@mic rosoft.com...

Eh ... sorry, I still have some problem ...
I copied the line of code but it didn't work out.

Could you post the exact line of code? I want to display the message 'One of the boxes is empty.' if any of the two boxes named as 'num1' and 'num2' is
left empty. Thanks again.

"Peter Proost" wrote:

Hi,

check if isnumeric(textb ox.text)
or for the length you could check textbox.text.le ngth > 0
or combine them

hth
Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F8******** *************** ***********@mic rosoft.com...

Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
program. My computer is running Win XP Pro.

I am writing a calculator and requires users to enter two numbers. After entering the numbers, they should click a button called 'Display Results'. How can I display a dialog box prompting the users to check their entry if they left any of the boxes empty? I have tried the .IsNaN function but in vein.

Thanks.
--
Xero

http://www.chezjeff.net
My personal web portal

[Xero]

Sorry but they don't work either.
The code 'num1.Text' is underlined by a blue line, saying that 'Text is not
a member of Double.'
Sorry that I forgot to tell you that both num1 and num2 are of data type
'Double'.

"Peter Proost" wrote:

Here are 2 possible pieces of code, place it behind the click event of a
button, or where you want to check the textboxes

<<<<<<<code 1>>>>>>

If Not IsNumeric(num1. Text) Or Not IsNumeric(num2. Text) Then
MsgBox("one of the boxes is empty")
End If

<<<<<<code 1>>>>>>

<<<<<<code 2>>>>>>

Dim blnOk As Boolean
If Not IsNumeric(num1. Text) Then
blnOk = False
MsgBox("Box one is empty")
Else
blnOk = True
End If
If Not IsNumeric(num2. Text) Then
blnOk = False
MsgBox("Box two is empty")
Else
blnOk = True
End If

If blnOk Then
'execute the rest of the code
MsgBox("They're both filled")
End If

<<<<<<code 2>>>>>>>>

greetz Peter

"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:C0******** *************** ***********@mic rosoft.com...

Eh ... sorry, I still have some problem ...
I copied the line of code but it didn't work out.

Could you post the exact line of code? I want to display the message 'One

of

the boxes is empty.' if any of the two boxes named as 'num1' and 'num2' is
left empty. Thanks again.

"Peter Proost" wrote:

Hi,

check if isnumeric(textb ox.text)
or for the length you could check textbox.text.le ngth > 0
or combine them

hth
Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F8******** *************** ***********@mic rosoft.com...
> Hello. I am using Visual Studio .NET (Academic Edition) to write a VB
> program. My computer is running Win XP Pro.
>
> I am writing a calculator and requires users to enter two numbers. After > entering the numbers, they should click a button called 'Display Results'. > How can I display a dialog box prompting the users to check their entry if > they left any of the boxes empty? I have tried the .IsNaN function but in > vein.
>
> Thanks.
> --
> Xero
>
> http://www.chezjeff.net
> My personal web portal

[Peter Proost]

is it a windows forms application?

grtz Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:D9******** *************** ***********@mic rosoft.com...

Sorry but they don't work either.
The code 'num1.Text' is underlined by a blue line, saying that 'Text is not a member of Double.'
Sorry that I forgot to tell you that both num1 and num2 are of data type
'Double'.

"Peter Proost" wrote:

Here are 2 possible pieces of code, place it behind the click event of a
button, or where you want to check the textboxes

<<<<<<<code 1>>>>>>

If Not IsNumeric(num1. Text) Or Not IsNumeric(num2. Text) Then
MsgBox("one of the boxes is empty")
End If

<<<<<<code 1>>>>>>

<<<<<<code 2>>>>>>

Dim blnOk As Boolean
If Not IsNumeric(num1. Text) Then
blnOk = False
MsgBox("Box one is empty")
Else
blnOk = True
End If
If Not IsNumeric(num2. Text) Then
blnOk = False
MsgBox("Box two is empty")
Else
blnOk = True
End If

If blnOk Then
'execute the rest of the code
MsgBox("They're both filled")
End If

<<<<<<code 2>>>>>>>>

greetz Peter

"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:C0******** *************** ***********@mic rosoft.com...

Eh ... sorry, I still have some problem ...
I copied the line of code but it didn't work out.

Could you post the exact line of code? I want to display the message 'One

of

the boxes is empty.' if any of the two boxes named as 'num1' and

'num2' is left empty. Thanks again.

"Peter Proost" wrote:

> Hi,
>
> check if isnumeric(textb ox.text)
> or for the length you could check textbox.text.le ngth > 0
> or combine them
>
> hth
> Peter
> "Xero" <jeff@chezjeff( REMOVE).net> wrote in message
> news:F8******** *************** ***********@mic rosoft.com...
> > Hello. I am using Visual Studio .NET (Academic Edition) to write a VB > > program. My computer is running Win XP Pro.
> >
> > I am writing a calculator and requires users to enter two numbers.

After

> > entering the numbers, they should click a button called 'Display

Results'.

> > How can I display a dialog box prompting the users to check their

entry if

> > they left any of the boxes empty? I have tried the .IsNaN function

but in

> > vein.
> >
> > Thanks.
> > --
> > Xero
> >
> > http://www.chezjeff.net
> > My personal web portal
>
>
>

[Xero]

Yes, it is.

"Peter Proost" wrote:

is it a windows forms application?

grtz Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:D9******** *************** ***********@mic rosoft.com...

Sorry but they don't work either.
The code 'num1.Text' is underlined by a blue line, saying that 'Text is

not

a member of Double.'
Sorry that I forgot to tell you that both num1 and num2 are of data type
'Double'.

"Peter Proost" wrote:

Here are 2 possible pieces of code, place it behind the click event of a
button, or where you want to check the textboxes

<<<<<<<code 1>>>>>>

If Not IsNumeric(num1. Text) Or Not IsNumeric(num2. Text) Then
MsgBox("one of the boxes is empty")
End If

<<<<<<code 1>>>>>>

<<<<<<code 2>>>>>>

Dim blnOk As Boolean
If Not IsNumeric(num1. Text) Then
blnOk = False
MsgBox("Box one is empty")
Else
blnOk = True
End If
If Not IsNumeric(num2. Text) Then
blnOk = False
MsgBox("Box two is empty")
Else
blnOk = True
End If

If blnOk Then
'execute the rest of the code
MsgBox("They're both filled")
End If

<<<<<<code 2>>>>>>>>

greetz Peter

"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:C0******** *************** ***********@mic rosoft.com...
> Eh ... sorry, I still have some problem ...
> I copied the line of code but it didn't work out.
>
> Could you post the exact line of code? I want to display the message 'One of
> the boxes is empty.' if any of the two boxes named as 'num1' and 'num2' is > left empty. Thanks again.
>
> "Peter Proost" wrote:
>
> > Hi,
> >
> > check if isnumeric(textb ox.text)
> > or for the length you could check textbox.text.le ngth > 0
> > or combine them
> >
> > hth
> > Peter
> > "Xero" <jeff@chezjeff( REMOVE).net> wrote in message
> > news:F8******** *************** ***********@mic rosoft.com...
> > > Hello. I am using Visual Studio .NET (Academic Edition) to write a VB > > > program. My computer is running Win XP Pro.
> > >
> > > I am writing a calculator and requires users to enter two numbers.
After
> > > entering the numbers, they should click a button called 'Display
Results'.
> > > How can I display a dialog box prompting the users to check their
entry if
> > > they left any of the boxes empty? I have tried the .IsNaN function but in
> > > vein.
> > >
> > > Thanks.
> > > --
> > > Xero
> > >
> > > http://www.chezjeff.net
> > > My personal web portal
> >
> >
> >

[Peter Proost]

when do you place the entered values in the double variables?

I propbably wont be able to reply anymore untill tomorrow

grtz peter

"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:F9******** *************** ***********@mic rosoft.com...

Yes, it is.

"Peter Proost" wrote:

is it a windows forms application?

grtz Peter
"Xero" <jeff@chezjeff( REMOVE).net> wrote in message
news:D9******** *************** ***********@mic rosoft.com...

Sorry but they don't work either.
The code 'num1.Text' is underlined by a blue line, saying that 'Text is

not

a member of Double.'
Sorry that I forgot to tell you that both num1 and num2 are of data

type 'Double'.

"Peter Proost" wrote:

> Here are 2 possible pieces of code, place it behind the click event of a > button, or where you want to check the textboxes
>
> <<<<<<<code 1>>>>>>
>
> If Not IsNumeric(num1. Text) Or Not IsNumeric(num2. Text) Then
> MsgBox("one of the boxes is empty")
> End If
>
> <<<<<<code 1>>>>>>
>
> <<<<<<code 2>>>>>>
>
> Dim blnOk As Boolean
> If Not IsNumeric(num1. Text) Then
> blnOk = False
> MsgBox("Box one is empty")
> Else
> blnOk = True
> End If
> If Not IsNumeric(num2. Text) Then
> blnOk = False
> MsgBox("Box two is empty")
> Else
> blnOk = True
> End If
>
> If blnOk Then
> 'execute the rest of the code
> MsgBox("They're both filled")
> End If
>
> <<<<<<code 2>>>>>>>>
>
> greetz Peter
>
>
>
> "Xero" <jeff@chezjeff( REMOVE).net> wrote in message
> news:C0******** *************** ***********@mic rosoft.com...
> > Eh ... sorry, I still have some problem ...
> > I copied the line of code but it didn't work out.
> >
> > Could you post the exact line of code? I want to display the message 'One

> of
> > the boxes is empty.' if any of the two boxes named as 'num1' and

'num2' is

> > left empty. Thanks again.
> >
> > "Peter Proost" wrote:
> >
> > > Hi,
> > >
> > > check if isnumeric(textb ox.text)
> > > or for the length you could check textbox.text.le ngth > 0
> > > or combine them
> > >
> > > hth
> > > Peter
> > > "Xero" <jeff@chezjeff( REMOVE).net> wrote in message
> > > news:F8******** *************** ***********@mic rosoft.com...
> > > > Hello. I am using Visual Studio .NET (Academic Edition) to

write a VB

> > > > program. My computer is running Win XP Pro.
> > > >
> > > > I am writing a calculator and requires users to enter two

numbers. > After
> > > > entering the numbers, they should click a button called 'Display > Results'.
> > > > How can I display a dialog box prompting the users to check their > entry if
> > > > they left any of the boxes empty? I have tried the .IsNaN

function but

> in
> > > > vein.
> > > >
> > > > Thanks.
> > > > --
> > > > Xero
> > > >
> > > > http://www.chezjeff.net
> > > > My personal web portal
> > >
> > >
> > >
>
>
>