array to listbox

[Mike]

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can I get
all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Alex Meleta]

Hi Mike,

Use foreach(ListItem listItem in CarList.Items) { listItem.Selected = true;
} instead.

CarList.Selected<someting> works with one item only.

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
M> highlight (select) all the items in the listbox were the value equals
M> (1,2,3,4,5,6,7). I'm able to only get the last value selected, how
M> can I get
M> all of them selected?
M> The listbox selectionMode= mulitple
M> for (int i = 0; i < Id.Length; i++)
M> {
M> CarList.SelectedValue = Id;
M> }
M> this is only getting me the last value being passed in from the array
M> selected. I want all of the values passed in selected.
M>

 

[Eliyahu Goldin]

CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

 

[Mike]

if the values are coming in as 1,2,3,4,5,6,7, how would the foreach work?
I've tried that and it didn't work due to the comma's, so I had to split it
and I'm getting the last one passed (7) selected

 

[Mike]

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages

CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can I
get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Eliyahu Goldin]

What's the type of Id? If it is integer, the code should compile. If it
is string, convert it first to integer as
System.Convert.ToInt32(Id)

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages

CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can I
get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Alex Meleta]

Hi Mike,

Ou, yes, it's for select all items.

However, the common idea was to use CarList.Items[<index>].Selected to select
particular item and CarList.Items[<index>].Text to determinate the value
to match.

E.g. you can chance the code to something like this:

for (int i = 0; i < CarList.Items.Count; i++)
{
if (Id.Contains(CarList.Items.Value)) // I dunno the type of Id array
(probably string), change it to you needs
{
CarList.Items.Selected = true;
}
}

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> if the values are coming in as 1,2,3,4,5,6,7, how would the foreach
M> work? I've tried that and it didn't work due to the comma's, so I had
M> to split it and I'm getting the last one passed (7) selected
M>
M> M>

Hi Mike,

Use foreach(ListItem listItem in CarList.Items) { listItem.Selected =
true; } instead.

CarList.Selected<someting> works with one item only.

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com
M> I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want
to
M> highlight (select) all the items in the listbox were the value
equals
M> (1,2,3,4,5,6,7). I'm able to only get the last value selected, how
M> can I get
M> all of them selected?
M> The listbox selectionMode= mulitple
M> for (int i = 0; i < Id.Length; i++)
M> {
M> CarList.SelectedValue = Id;
M> }
M> this is only getting me the last value being passed in from the
array
M> selected. I want all of the values passed in selected.
M>

 

[Patrice]

My crystal ball tells me this is a type problem (for example split might
well create a string array so you would need to convert Id to an
integer).

Please always post the error message when you have an error ???!!!!

--
Patrice

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages

CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can I
get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Alex Meleta]

Hi Mike,

See msdn. If Id is type of int it should be compiled.

E.g. this will be compiled:
List<int> Id = new List<int>();
ListBox1.Items[Id].Selected = true;

and this is not:
List<string> Id = new List<string>();
ListBox1.Items[Id].Selected = true;

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> I can't even compile with this:
M>
M> CarList.Items[Id].Selected = true;
M>
M> I get error messages

CarList.Items[Id].Selected = true;

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value
equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how
can I
get all of them selected?
The listbox selectionMode= mulitple
for (int i = 0; i < Id.Length; i++)
{
CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the
array
selected. I want all of the values passed in selected.

 

[Mike]

its an interger:

I have this:

for (int i = 0; i < Id.Length; i++)
{
CarList.Items[Convert.ToInt32(ID)].Selected = true;
}

and I get this when I run it now:
Index was out of range. Must be non-negative and less than the size of the
collection.
Parameter name: index

and its referring to this line:
CarList.Items[Convert.ToInt32(ID)].Selected = true;

the id value is coming through as (1,2,3,4,5,6,7)
then I split it to remove the comma's

What's the type of Id? If it is integer, the code should compile. If it
is string, convert it first to integer as
System.Convert.ToInt32(Id)

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages

CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net


I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can
I get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Mike]

this is driving me nuts,
I tried the code snippet and nothing is highlighted. Its not even executing
the (IF) logic of the code.


for (int i = 0; i < CarList.Items.Count; i++)

{
if (Id.Contains(CarList.Items.Value)) // I dunno the type of Id array
(probably string), change it to you needs {
CarList.Items.Selected = true;
}
}

Hi Mike,

Ou, yes, it's for select all items.
However, the common idea was to use CarList.Items[<index>].Selected to
select particular item and CarList.Items[<index>].Text to determinate the
value to match.

E.g. you can chance the code to something like this:
for (int i = 0; i < CarList.Items.Count; i++)
{
if (Id.Contains(CarList.Items.Value)) // I dunno the type of Id array
(probably string), change it to you needs {
CarList.Items.Selected = true;
}
}

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> if the values are coming in as 1,2,3,4,5,6,7, how would the foreach
M> work? I've tried that and it didn't work due to the comma's, so I had
M> to split it and I'm getting the last one passed (7) selected
M> M>

Hi Mike,

Use foreach(ListItem listItem in CarList.Items) { listItem.Selected =
true; } instead.

CarList.Selected<someting> works with one item only.

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com
M> I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want
to
M> highlight (select) all the items in the listbox were the value
equals
M> (1,2,3,4,5,6,7). I'm able to only get the last value selected, how
M> can I get
M> all of them selected?
M> The listbox selectionMode= mulitple
M> for (int i = 0; i < Id.Length; i++)
M> {
M> CarList.SelectedValue = Id;
M> }
M> this is only getting me the last value being passed in from the
array
M> selected. I want all of the values passed in selected.
M>

 

[Patrice]

Ah great ! This error message means that the index is out of the allowed
bounds. For example is 1 the first element ? It should be 0.

Depending what you are doing you may want to use 0,1,2,3,4,5,6 instead of
1,2,3,4,5,6,7 if you are using the order of those elements in the
collection.

--
Patrice

its an interger:

I have this:

for (int i = 0; i < Id.Length; i++)
{
CarList.Items[Convert.ToInt32(ID)].Selected = true;
}

and I get this when I run it now:
Index was out of range. Must be non-negative and less than the size of the
collection.
Parameter name: index

and its referring to this line:
CarList.Items[Convert.ToInt32(ID)].Selected = true;

the id value is coming through as (1,2,3,4,5,6,7)
then I split it to remove the comma's

What's the type of Id? If it is integer, the code should compile. If
it is string, convert it first to integer as
System.Convert.ToInt32(Id)

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages
message CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net


I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how can
I get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Alex Meleta]

Hi Mike,

So, that means that length of Id array greater then CarList.Items's length.
See my code in the early message with validation by Id.Contains or such methods.

for (int i = 0; i < CarList.Items.Count; i++)
{
if (Id.Contains(... some checks and convertion... CarList.Items.Value )
{
CarList.Items.Selected = true;
}
}

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> its an interger:
M>
M> I have this:
M>
M> for (int i = 0; i < Id.Length; i++)
M> {
M> CarList.Items[Convert.ToInt32(ID)].Selected = true;
M> }
M> and I get this when I run it now:
M> Index was out of range. Must be non-negative and less than the size
M> of the
M> collection.
M> Parameter name: index
M> and its referring to this line:
M> CarList.Items[Convert.ToInt32(ID)].Selected = true;
M> the id value is coming through as (1,2,3,4,5,6,7)
M> then I split it to remove the comma's
M> message M>

What's the type of Id? If it is integer, the code should compile.
If it
is string, convert it first to integer as
System.Convert.ToInt32(Id)
--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages
in
message CarList.Items[Id].Selected = true;

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want
to
highlight (select) all the items in the listbox were the value
equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how
can
I get all of them selected?
The listbox selectionMode= mulitple
for (int i = 0; i < Id.Length; i++)
{
CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the
array
selected. I want all of the values passed in selected.

 

[Mike]

the numbers being passed in aren't index numbers there values of the data
being passed.

how this work is, I have a gridview and has a salesman, and cars listed next
to the salesperson

example:
salesman: cars
smith BMW, Lexus, Mercedes, Volvo


I have a button that allows me to edit the sales person, I then I need to
carry over BMW, Lexus, Merecedes, Volvo to my edit screen and have those
cars highlighted in my listbox.

The value of the cars are being passed(BMW = 1, Lexus = 4, Mercedes = 7,
Volco = 5) like that, So I need to grab that value, and select each one in
my listbox.

Ah great ! This error message means that the index is out of the allowed
bounds. For example is 1 the first element ? It should be 0.

Depending what you are doing you may want to use 0,1,2,3,4,5,6 instead of
1,2,3,4,5,6,7 if you are using the order of those elements in the
collection.

--
Patrice

its an interger:

I have this:

for (int i = 0; i < Id.Length; i++)
{
CarList.Items[Convert.ToInt32(ID)].Selected = true;
}

and I get this when I run it now:
Index was out of range. Must be non-negative and less than the size of
the collection.
Parameter name: index

and its referring to this line:
CarList.Items[Convert.ToInt32(ID)].Selected = true;

the id value is coming through as (1,2,3,4,5,6,7)
then I split it to remove the comma's

What's the type of Id? If it is integer, the code should compile. If
it is string, convert it first to integer as
System.Convert.ToInt32(Id)

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net


I can't even compile with this:

CarList.Items[Id].Selected = true;

I get error messages
message CarList.Items[Id].Selected = true;


--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net


I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I want to
highlight (select) all the items in the listbox were the value equals
(1,2,3,4,5,6,7). I'm able to only get the last value selected, how
can I get all of them selected?
The listbox selectionMode= mulitple

for (int i = 0; i < Id.Length; i++)
{

CarList.SelectedValue = Id;
}
this is only getting me the last value being passed in from the array
selected. I want all of the values passed in selected.

 

[Alex Meleta]

Hi Mike,

It's because the code should be adapted to your circumstances. e.g. like
this:

List<int> Id = new List<int>();
for (int i = 0; i < ListBox1.Items.Count; i++)
{
if (Id.Contains(Convert.ToInt32(ListBox1.Items.Value))) // be sure
that all items are integer or do some type check
{
ListBox1.Items.Selected = true;
}
}

So you should just know that particular item can be selected only by <List>.Items[<index>].Selected
in the multiple mode. Matching and other background code depends on you application.

Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> this is driving me nuts,
M> I tried the code snippet and nothing is highlighted. Its not even
M> executing
M> the (IF) logic of the code.
M> for (int i = 0; i < CarList.Items.Count; i++)
M>

{
if (Id.Contains(CarList.Items.Value)) // I dunno the type of Id
array
(probably string), change it to you needs {
CarList.Items.Selected = true;
}
}

M> M>

Hi Mike,

Ou, yes, it's for select all items.
However, the common idea was to use CarList.Items[<index>].Selected
to
select particular item and CarList.Items[<index>].Text to determinate
the
value to match.
E.g. you can chance the code to something like this:
for (int i = 0; i < CarList.Items.Count; i++)
{
if (Id.Contains(CarList.Items.Value)) // I dunno the type of Id
array
(probably string), change it to you needs {
CarList.Items.Selected = true;
}
}
Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com
M> if the values are coming in as 1,2,3,4,5,6,7, how would the
foreach
M> work? I've tried that and it didn't work due to the comma's, so I
had
M> to split it and I'm getting the last one passed (7) selected
M> M>

Hi Mike,

Use foreach(ListItem listItem in CarList.Items) { listItem.Selected
= true; } instead.

CarList.Selected<someting> works with one item only.

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com
M> I'm passing an array to a listbox such as (1,2,3,4,5,6,7), I
want
to
M> highlight (select) all the items in the listbox were the value
equals
M> (1,2,3,4,5,6,7). I'm able to only get the last value selected,
how
M> can I get
M> all of them selected?
M> The listbox selectionMode= mulitple
M> for (int i = 0; i < Id.Length; i++)
M> {
M> CarList.SelectedValue = Id;
M> }
M> this is only getting me the last value being passed in from the
array
M> selected. I want all of the values passed in selected.
M>

 

[Alex Meleta]

ok. so, I've made some extra comments to the code.

List<int> Id = new List<int>(); // imagine that it's a int array

// Iterates throught ListBox1.Items to find appropriate one
foreach(ListItem listItem in CarList.Items)
{
// Seek the listItem.Value in the Id's array (you can change
this code as you need).
if (Id.Contains(Convert.ToInt32(listItem.Value))) // or (carValue
= listItem.Value) in case of single one
{
// If value is found then select the item
listItem.Selected = true;
}
}

Hopefully, it helps

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> the numbers being passed in aren't index numbers there values of the
M> data being passed.
M>
M> how this work is, I have a gridview and has a salesman, and cars
M> listed next to the salesperson
M>
M> example:
M> salesman: cars
M> smith BMW, Lexus, Mercedes, Volvo
M> I have a button that allows me to edit the sales person, I then I
M> need to carry over BMW, Lexus, Merecedes, Volvo to my edit screen and
M> have those cars highlighted in my listbox.
M>
M> The value of the cars are being passed(BMW = 1, Lexus = 4, Mercedes
M> = 7, Volco = 5) like that, So I need to grab that value, and select
M> each one in my listbox.
M>

 

[Mike]

this is what i actaully started out with and it only selected the last item
in the 'array' in my list box.
the only thing I didn't have was: but everything else I had,then that didn't
work so I tried some other things and got the same result or nothing got
selected. so.



List<int> Id = new List<int>();

also, I've been looking through google and found a posting that was doing
the same thing and the response was to use

ListBox.SetSelected(<value>, true);

now if I add ListBox.SetSelected(<value>, true) I get this:

Error 4 'System.Web.UI.WebControls.ListBox' does not contain a definition
for 'SetSelected'

why? I even copied some code from MSDN with this and that errored out as
well with the same error

 

[Mike]

I just saw were listbox.setselected is for winform list box not asp.net

this is what i actaully started out with and it only selected the last
item in the 'array' in my list box.
the only thing I didn't have was: but everything else I had,then that
didn't work so I tried some other things and got the same result or
nothing got selected. so.



List<int> Id = new List<int>();

also, I've been looking through google and found a posting that was doing
the same thing and the response was to use

ListBox.SetSelected(<value>, true);

now if I add ListBox.SetSelected(<value>, true) I get this:

Error 4 'System.Web.UI.WebControls.ListBox' does not contain a definition
for 'SetSelected'

why? I even copied some code from MSDN with this and that errored out as
well with the same error

ok. so, I've made some extra comments to the code.

List<int> Id = new List<int>(); // imagine that it's a int array
// Iterates throught ListBox1.Items to find appropriate one
foreach(ListItem listItem in CarList.Items)
{
// Seek the listItem.Value in the Id's array (you can change
this code as you need).
if (Id.Contains(Convert.ToInt32(listItem.Value))) // or
(carValue = listItem.Value) in case of single one
{
// If value is found then select the item
listItem.Selected = true;
}
}

Hopefully, it helps

Kind Regards, Alex Meleta
[TechBlog] http://devkids.blogspot.com



M> the numbers being passed in aren't index numbers there values of the
M> data being passed.
M> M> how this work is, I have a gridview and has a salesman, and cars
M> listed next to the salesperson
M> M> example:
M> salesman: cars
M> smith BMW, Lexus, Mercedes, Volvo
M> I have a button that allows me to edit the sales person, I then I
M> need to carry over BMW, Lexus, Merecedes, Volvo to my edit screen and
M> have those cars highlighted in my listbox.
M> M> The value of the cars are being passed(BMW = 1, Lexus = 4,
Mercedes
M> = 7, Volco = 5) like that, So I need to grab that value, and select
M> each one in my listbox.
M>

 

[Mike]

I got this to work finally. My code was actually correct, I just never bound
the listbox, so when my foreach loop was executed, it had no data to loop
through. Thouh I was seeing the data in the listbox, it was cached, so once
I called my grid.databind() it worked.