Appending text to an array of textboxes

[Jacob.Bruxer]

Hi,
I want to be able to append text using a For loop to each textbox in an
array of textboxes that I've created, called tBoxes(). Basically I
want to add a number of spaces to each textbox in the array. ie. If
spaces(0) = 3, I'd want to add 3 spaces (" ") to tBoxes(0), if
spaces(1) = 4, I'd want to add 4 spaces (" ") to tBoxes(1), and so
on. My code looks something like this...

Dim i as integer
Dim j as integer
Dim m as integer

' I determine value j, which is the length of each of my arrays
j = some integer

Dim tBoxes(j-1) as textbox
Dim spaces(j-1) as integer

' I determine the number of spaces and assign integer values to the
array spaces(i)

' For each textbox, I try to append a space for each integer in
spaces(i), but it doesn't work.
For i = 0 To j - 1
For m = 1 To spaces(i)
tBoxes(i).AppendText(" ")
Next
Next

When I run the code I get an error: "NullReferenceException was
unhandled" and "Object reference not set to an instance of an object."

I hope this is all clear. I'm new to programming so any suggestions or
ideas on what I'm doing wrong would be most appreciated. Thanks.

[Andrew Backer]

Are you actually creating the textboxes anywhere? It just look like
you are initializing an array that is of type textbox. Try something
like this

Dim x(12) As TextBox
For i As Integer = 1 To 12
x(i) = New TextBox()
Next

HTH,
Andrew

Ja**********@ec.gc.ca wrote:

Hi,
I want to be able to append text using a For loop to each textbox in an
array of textboxes that I've created, called tBoxes(). Basically I
want to add a number of spaces to each textbox in the array. ie. If
spaces(0) = 3, I'd want to add 3 spaces (" ") to tBoxes(0), if
spaces(1) = 4, I'd want to add 4 spaces (" ") to tBoxes(1), and so
on. My code looks something like this...

Dim i as integer
Dim j as integer
Dim m as integer

' I determine value j, which is the length of each of my arrays
j = some integer

Dim tBoxes(j-1) as textbox
Dim spaces(j-1) as integer

' I determine the number of spaces and assign integer values to the
array spaces(i)

' For each textbox, I try to append a space for each integer in
spaces(i), but it doesn't work.
For i = 0 To j - 1
For m = 1 To spaces(i)
tBoxes(i).AppendText(" ")
Next
Next

When I run the code I get an error: "NullReferenceException was
unhandled" and "Object reference not set to an instance of an object."

I hope this is all clear. I'm new to programming so any suggestions or
ideas on what I'm doing wrong would be most appreciated. Thanks.

[guigui]

When I run the code I get an error: "NullReferenceException was

unhandled" and "Object reference not set to an instance of an object."

i'm not sure using array is a good way prefer collections

try

Sub ess()

Dim j As Integer

Dim i As Integer

Dim tbx As TextBox

Dim tbcols As New Collection

'filling the collection

For i = 1 To j

tbx = New TextBox

tbcols.Add(tbx, i.ToString)

Next

'look into the collection

For Each tbx In tbcols

Next

End Sub

<Ja**********@ec.gc.caa écrit dans le message de news:
11*********************@m79g2000cwm.googlegroups.c om...

Hi,
I want to be able to append text using a For loop to each textbox in an
array of textboxes that I've created, called tBoxes(). Basically I
want to add a number of spaces to each textbox in the array. ie. If
spaces(0) = 3, I'd want to add 3 spaces (" ") to tBoxes(0), if
spaces(1) = 4, I'd want to add 4 spaces (" ") to tBoxes(1), and so
on. My code looks something like this...

Dim i as integer
Dim j as integer
Dim m as integer

' I determine value j, which is the length of each of my arrays
j = some integer

Dim tBoxes(j-1) as textbox
Dim spaces(j-1) as integer

' I determine the number of spaces and assign integer values to the
array spaces(i)

' For each textbox, I try to append a space for each integer in
spaces(i), but it doesn't work.
For i = 0 To j - 1
For m = 1 To spaces(i)
tBoxes(i).AppendText(" ")
Next
Next

When I run the code I get an error: "NullReferenceException was
unhandled" and "Object reference not set to an instance of an object."

I hope this is all clear. I'm new to programming so any suggestions or
ideas on what I'm doing wrong would be most appreciated. Thanks.

[Jacob.Bruxer]

Thanks a lot everyone, with your help I was able to figure it out.
guigui wrote:

When I run the code I get an error: "NullReferenceException was

unhandled" and "Object reference not set to an instance of an object."

i'm not sure using array is a good way prefer collections

try

Sub ess()

Dim j As Integer

Dim i As Integer

Dim tbx As TextBox

Dim tbcols As New Collection

'filling the collection

For i = 1 To j

tbx = New TextBox

tbcols.Add(tbx, i.ToString)

Next

'look into the collection

For Each tbx In tbcols

Next

End Sub

<Ja**********@ec.gc.caa écrit dans le message de news:
11*********************@m79g2000cwm.googlegroups.c om...

Hi,
I want to be able to append text using a For loop to each textbox in an
array of textboxes that I've created, called tBoxes(). Basically I
want to add a number of spaces to each textbox in the array. ie. If
spaces(0) = 3, I'd want to add 3 spaces (" ") to tBoxes(0), if
spaces(1) = 4, I'd want to add 4 spaces (" ") to tBoxes(1), and so
on. My code looks something like this...

Dim i as integer
Dim j as integer
Dim m as integer

' I determine value j, which is the length of each of my arrays
j = some integer

Dim tBoxes(j-1) as textbox
Dim spaces(j-1) as integer

' I determine the number of spaces and assign integer values to the
array spaces(i)

' For each textbox, I try to append a space for each integer in
spaces(i), but it doesn't work.
For i = 0 To j - 1
For m = 1 To spaces(i)
tBoxes(i).AppendText(" ")
Next
Next

When I run the code I get an error: "NullReferenceException was
unhandled" and "Object reference not set to an instance of an object."

I hope this is all clear. I'm new to programming so any suggestions or
ideas on what I'm doing wrong would be most appreciated. Thanks.