[RESOLVED] [2005] Save Listview items To Xml File

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Oct 22nd, 2008, 01:43 PM
killer7k

[RESOLVED] [2005] Save Listview items To Xml File

Hi ,

i have a listview with column & item
i need to save those to an xml file so after i can manipulate with database
i searched here on the forum before found some example but not so good
i just search for a simple one

Thanks :)
Oct 22nd, 2008, 07:06 PM
killer7k

Re: [2005] Listview To Xml File

any one ? :rolleyes:
Oct 23rd, 2008, 06:41 AM
killer7k

Re: [2005] Save Listview items To Xml File

is it a hard question or something may i cant know ?
i can save the items to a .txt file
but i want to save it to .xml file to interact with dataset....

Thanks
Oct 23rd, 2008, 08:01 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

Try creating a List(Of ListViewItem) which will hold all of the items and then apply XML serialization.
Oct 23rd, 2008, 01:54 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by obi1kenobi

Try creating a List(Of ListViewItem) which will hold all of the items and then apply XML serialization.

Thanks m8 but do you have any example i didnt get it well ?
Oct 23rd, 2008, 04:16 PM
obi1kenobi

Re: [2005] Save Listview items To Xml File
Hmmm... Just checked MSDN documentation and it states that ArrayLists and List(Of T) cannot be serialized using the XmlSerializer. No matter, you should still be able to serialize an array of ListViewItems.

This is how you would do it:
1. Create a class which would have an array of ListViewItems as a variable.
  
  Code:
  
  Public Class ListViewItemHolder Public items() As ListViewItem End Class
2. Fill the array in your newly created class with your ListViewItem objects.
3. Serialize the class using an instance of the System.Xml.Serialization.XmlSerializer class. If you have issues with the use of this class, the MSDN Library has an excellent example in the Examples section of this page.
If you need further assistance, I can try to write a complete example in VS for you in the morning.
Oct 23rd, 2008, 06:49 PM
killer7k

Re: [2005] Save Listview items To Xml File
Quote:
Originally Posted by obi1kenobi

Hmmm... Just checked MSDN documentation and it states that ArrayLists and List(Of T) cannot be serialized using the XmlSerializer. No matter, you should still be able to serialize an array of ListViewItems.

This is how you would do it:

Create a class which would have an array of ListViewItems as a variable.

Code:

Public Class ListViewItemHolder Public items() As ListViewItem End Class

Fill the array in your newly created class with your ListViewItem objects.
Serialize the class using an instance of the System.Xml.Serialization.XmlSerializer class. If you have issues with the use of this class, the MSDN Library has an excellent example in the Examples section of this page.

If you need further assistance, I can try to write a complete example in VS for you in the morning.
Thanks m8 For your help much appreciated
it would be nice if you can write a complete example in VS
but when you have free time
it's now 2 days & i'am trying some stuff about ListViewItem & others but no luck :rolleyes:

Thanks :)
Oct 24th, 2008, 04:27 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

So you didn't get it working yet huh? Ok I'll try and write an example... Be back shortly.
Oct 24th, 2008, 05:56 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

Argh... The Font property cannot be serialized because Font does not have a parameterless constructor. :@

Ok, change of strategy. Which parts of the ListViewItem do you need? The main text, any subitems, what else? You can create a structure which will hold the relevant details and serialize an array of that structure. Just tell me what you need and I'll complete the example.
Oct 24th, 2008, 08:31 AM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by obi1kenobi

Argh... The Font property cannot be serialized because Font does not have a parameterless constructor. :@

Ok, change of strategy. Which parts of the ListViewItem do you need? The main text, any subitems, what else? You can create a structure which will hold the relevant details and serialize an array of that structure. Just tell me what you need and I'll complete the example.

Hi ,

i have different data coming each time
but let's say an easy example i can get with it so i can update it to my own

we have a listview1 with 3 column 1 : customer_id,customer_name,customer_email

item subitem1 subitem 2
1 John [email protected]
2 Brad [email protected].

so when i save it to an .xml file it will be look like this

Code:

<?xml version="1.0" standalone="yes"?> <NewDataSet> <customer> <customer_id>1</customer_id> <customer_name>John</customer_name> <customer_email>[email protected]</customer_email> </customer> <customer> <customer_id>2</customer_id> <customer_name>Brad</customer_name> <customer_email>[email protected]</customer_email> </customer> </NewDataSet>

Thanks :)

Re: [2005] Save Listview items To Xml File

you can serialize a list(of T).

heres how to serialize/deserialize a listviews contents

vb Code:

Public Structure ListViewItems
    Public column1 As String
    Public column2 As String
    Public column3 As String
    Public column4 As String
End Structure
Private items As New List(Of ListViewItems)
 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
     items = New List(Of ListViewItems)
     For Each lvi As ListViewItem In ListView1.Items
          Dim lv As New ListViewItems
          lv.column1 = lvi.SubItems(0).Text
          lv.column2 = lvi.SubItems(1).Text
          lv.column3 = lvi.SubItems(2).Text
          lv.column4 = lvi.SubItems(3).Text
          items.Add(lv)
     Next
     Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
     Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create)
     serializer.Serialize(fs, items)
     fs.Close()
End Sub
 
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
     items = New List(Of ListViewItems)
     Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
     Dim SR As New IO.StreamReader("test.xml")
     items = DirectCast(serializer.Deserialize(SR), Global.System.Collections.Generic.List(Of ListViewItems))
     SR.Close()
     For x As Integer = 0 To items.Count - 1
          Dim lvi As New ListViewItem(items(x).column1)
          lvi.SubItems.Add(items(x).column2)
          lvi.SubItems.Add(items(x).column3)
          lvi.SubItems.Add(items(x).column4)
          ListView1.Items.Add(lvi)
     Next
End Sub

Oct 25th, 2008, 03:00 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

That's exactly what I was thinking. Does it run properly? Have you checked it? I'd only replace the manual addition of subitems with a loop, so no subitems get lost.

About the List(Of T) thing, I can't imagine why MSDN would write an incorrect statement... :/
Oct 25th, 2008, 04:55 PM
.paul.

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by obi1kenobi

Does it run properly? Have you checked it?

yep. tried + tested + it works
Oct 25th, 2008, 06:52 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

you can serialize a list(of T).

heres how to serialize/deserialize a listviews contents

[CODE]
Public Structure ListViewItems
Public column1 As String
Public column2 As String
Public column3 As String
Public column4 As String
End Structure
Private items As New List(Of ListViewItems)

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
items = New List(Of ListViewItems)
For Each lvi As ListViewItem In ListView1.Items
Dim lv As New ListViewItems
lv.column1 = lvi.SubItems(0).Text
lv.column2 = lvi.SubItems(1).Text
lv.column3 = lvi.SubItems(2).Text
lv.column4 = lvi.SubItems(3).Text
items.Add(lv)
Next
Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create)
serializer.Serialize(fs, items)
fs.Close()
End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
items = New List(Of ListViewItems)
Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
Dim SR As New IO.StreamReader("test.xml")
items = DirectCast(serializer.Deserialize(SR), Global.System.Collections.Generic.List(Of ListViewItems))
SR.Close()
For x As Integer = 0 To items.Count - 1
Dim lvi As New ListViewItem(items(x).column1)
lvi.SubItems.Add(items(x).column2)
lvi.SubItems.Add(items(x).column3)
lvi.SubItems.Add(items(x).column4)
ListView1.Items.Add(lvi)
Next
End Sub
[/HIGHLIGHT]

Hi paul ,

Thanks m8 for your example it work great but just having some problem here
2 problem :
i'am trying instead of calling the column column1,column2 .. to Listview1.column original that are
i'am trying to loop the subitem because each time i can have 2 column or 3 or 4..

here you my code :

Code:

Public Structure ListViewItems Public col1 As String Public col2 As String Public col3 As String Public col4 As String End Structure Private items As New List(Of ListViewItems) Private Sub btnsavexml_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsavexml.Click items = New List(Of ListViewItems) Dim i As Integer Dim lv As New ListViewItems For Each lvi As ListViewItem In ListView1.Items For i = 0 To ListView1.Columns.Count - 1 lv.col1 = lvi.SubItems(i).Text items.Add(lv) Next Next Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems))) Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create) serializer.Serialize(fs, items) fs.Close() End Sub

hope you understand what i mean

Thanks ;)

Re: [2005] Save Listview items To Xml File

you can't loop it that way.

i'd use the 4 column approach. if only 2 or 3 columns are used, you'll have 1 or 2 empty fields in your xml record. its the only way if some of your listviewitems have 4 columns.

vb Code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
     items = New List(Of ListViewItems)
     For Each lvi As ListViewItem In ListView1.Items
          Dim lv As New ListViewItems
          lv.column1 = lvi.SubItems(0).Text
          If lvi.SubItems.Count > 1 Then lv.column2 = lvi.SubItems(1).Text
          If lvi.SubItems.Count > 2 Then lv.column3 = lvi.SubItems(2).Text
          If lvi.SubItems.Count > 3 Then lv.column4 = lvi.SubItems(3).Text
          items.Add(lv)
     Next
     Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
     Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create)
     serializer.Serialize(fs, items)
     fs.Close()
End Sub

Oct 26th, 2008, 03:30 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

The problem is that an item may not have subitems for all columns. :S

IMHO your loops should look like this:

Code:

For Each lvi As ListViewItem In ListView1.Items For i = 0 To lvi.SubItems.Count - 1 lv.SubItems.Add(lvi.SubItems(i)) Next items.Add(lv) Next
Oct 26th, 2008, 05:49 AM
killer7k

Re: [2005] Save Listview items To Xml File

Thank you both Guy i got it working but still a problem that you didnt answered me
how i can change the column1,column2,column3,column4 name to original listview column name ?

cheerz :)
Oct 26th, 2008, 09:59 AM
.paul.

Re: [2005] Save Listview items To Xml File

just change all occurrences of column1 to the original listview column name, then do the same for column2,column3,column4.

you could also change all occurrences of ListViewItems to another name.
if you open the xml file, you'll see how those names are used.
Oct 26th, 2008, 11:19 AM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

just change all occurrences of column1 to the original listview column name, then do the same for column2,column3,column4.

you could also change all occurrences of ListViewItems to another name.
if you open the xml file, you'll see how those names are used.

what do you mean by occurrences :rolleyes: ?
Oct 26th, 2008, 11:42 AM
.paul.

Re: [2005] Save Listview items To Xml File

definition of occurrence
Oct 26th, 2008, 12:16 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

definition of occurrence

lol i changed that i was thinking something else because it doesnt work really :blush:
Oct 26th, 2008, 12:27 PM
.paul.

Re: [2005] Save Listview items To Xml File

theres no reason it shouldn't work
Oct 26th, 2008, 01:37 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

theres no reason it shouldn't work

yes it doesnt work :blush:
Oct 26th, 2008, 02:00 PM
.paul.

Re: [2005] Save Listview items To Xml File

whats the problem? why doesn't it work?
post the code
Oct 26th, 2008, 02:05 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

whats the problem? why doesn't it work?
post the code

here you last one

Code:

Public Structure ListViewItems Public col1 As String Public col2 As String Public col3 As String Public col4 As String Public col5 As String Public col6 As String Public col7 As String Public col8 As String Public col9 As String Public col10 As String Public col11 As String Public col12 As String Public col13 As String Public col14 As String Public col15 As String Public col16 As String End Structure Private items As New List(Of ListViewItems) Private Sub btnsavexml_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsavexml.Click items = New List(Of ListViewItems) Dim i As Integer Dim lv As New ListViewItems lv.col1 = ListView1.Columns.Item(0).Text lv.col2 = ListView1.Columns.Item(1).Text lv.col3 = ListView1.Columns.Item(2).Text lv.col4 = ListView1.Columns.Item(3).Text lv.col5 = ListView1.Columns.Item(4).Text lv.col6 = ListView1.Columns.Item(5).Text lv.col7 = ListView1.Columns.Item(6).Text lv.col8 = ListView1.Columns.Item(7).Text lv.col9 = ListView1.Columns.Item(8).Text lv.col10 = ListView1.Columns.Item(9).Text lv.col11 = ListView1.Columns.Item(10).Text lv.col12 = ListView1.Columns.Item(11).Text lv.col13 = ListView1.Columns.Item(12).Text lv.col14 = ListView1.Columns.Item(13).Text lv.col15 = ListView1.Columns.Item(14).Text lv.col16 = ListView1.Columns.Item(15).Text For Each lvi As ListViewItem In ListView1.Items lv.col1 = lvi.SubItems(i).Text If lvi.SubItems.Count > 1 Then lv.col2 = lvi.SubItems(1).Text If lvi.SubItems.Count > 2 Then lv.col3 = lvi.SubItems(2).Text If lvi.SubItems.Count > 3 Then lv.col4 = lvi.SubItems(3).Text If lvi.SubItems.Count > 4 Then lv.col5 = lvi.SubItems(4).Text If lvi.SubItems.Count > 5 Then lv.col6 = lvi.SubItems(5).Text If lvi.SubItems.Count > 6 Then lv.col7 = lvi.SubItems(6).Text If lvi.SubItems.Count > 7 Then lv.col8 = lvi.SubItems(7).Text If lvi.SubItems.Count > 8 Then lv.col9 = lvi.SubItems(8).Text If lvi.SubItems.Count > 9 Then lv.col10 = lvi.SubItems(9).Text If lvi.SubItems.Count > 10 Then lv.col11 = lvi.SubItems(10).Text If lvi.SubItems.Count > 11 Then lv.col12 = lvi.SubItems(11).Text If lvi.SubItems.Count > 12 Then lv.col13 = lvi.SubItems(12).Text If lvi.SubItems.Count > 13 Then lv.col14 = lvi.SubItems(13).Text If lvi.SubItems.Count > 14 Then lv.col15 = lvi.SubItems(14).Text If lvi.SubItems.Count > 15 Then lv.col16 = lvi.SubItems(15).Text items.Add(lv) Next Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems))) Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create) serializer.Serialize(fs, items) fs.Close() End Sub

Thanks

Re: [2005] Save Listview items To Xml File

vb Code:

Private Sub btnsavexml_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsavexml.Click
     items = New List(Of ListViewItems)
        
     For Each lvi As ListViewItem In ListView1.Items
          Dim lv As New ListViewItems
 
          lv.col1 = lvi.SubItems(0).Text
 
          If lvi.SubItems.Count > 1 Then lv.col2 = lvi.SubItems(1).Text
          If lvi.SubItems.Count > 2 Then lv.col3 = lvi.SubItems(2).Text
          If lvi.SubItems.Count > 3 Then lv.col4 = lvi.SubItems(3).Text
          If lvi.SubItems.Count > 4 Then lv.col5 = lvi.SubItems(4).Text
          If lvi.SubItems.Count > 5 Then lv.col6 = lvi.SubItems(5).Text
          If lvi.SubItems.Count > 6 Then lv.col7 = lvi.SubItems(6).Text
          If lvi.SubItems.Count > 7 Then lv.col8 = lvi.SubItems(7).Text
          If lvi.SubItems.Count > 8 Then lv.col9 = lvi.SubItems(8).Text
          If lvi.SubItems.Count > 9 Then lv.col10 = lvi.SubItems(9).Text
          If lvi.SubItems.Count > 10 Then lv.col11 = lvi.SubItems(10).Text
          If lvi.SubItems.Count > 11 Then lv.col12 = lvi.SubItems(11).Text
          If lvi.SubItems.Count > 12 Then lv.col13 = lvi.SubItems(12).Text
          If lvi.SubItems.Count > 13 Then lv.col14 = lvi.SubItems(13).Text
          If lvi.SubItems.Count > 14 Then lv.col15 = lvi.SubItems(14).Text
          If lvi.SubItems.Count > 15 Then lv.col16 = lvi.SubItems(15).Text
 
          items.Add(lv)
 
     Next
 
 
     Dim serializer As New Xml.Serialization.XmlSerializer(GetType(List(Of ListViewItems)))
 
     Dim fs As New IO.FileStream("test.xml", IO.FileMode.Create)
 
     serializer.Serialize(fs, items)
 
     fs.Close()
End Sub

Oct 26th, 2008, 02:27 PM
killer7k

Re: [2005] Save Listview items To Xml File

What did you changed ?
where are the listview column item?

Re: [2005] Save Listview items To Xml File

you can't add the column names that way.
this is how:

vb Code:

Public Structure ListViewItems 'you could change this to Customers (for example)
     Public col1 As String 'you could change this to Customer_ID (for example)
     Public col2 As String 'and this to Customer_Name
     Public col3 As String
     Public col4 As String
     Public col5 As String
     Public col6 As String
     Public col7 As String
     Public col8 As String
     Public col9 As String
     Public col10 As String
     Public col11 As String
     Public col12 As String
     Public col13 As String
     Public col14 As String
     Public col15 As String
     Public col16 As String
End Structure

do you see what i mean?

Re: [2005] Save Listview items To Xml File

Quote:
Originally Posted by .paul.
you can't add the column names that way.
this is how:
vb Code:
Public Structure ListViewItems 'you could change this to Customers (for example)
     Public col1 As String 'you could change this to Customer_ID (for example)
     Public col2 As String 'and this to Customer_Name
     Public col3 As String
     Public col4 As String
     Public col5 As String
     Public col6 As String
     Public col7 As String
     Public col8 As String
     Public col9 As String
     Public col10 As String
     Public col11 As String
     Public col12 As String
     Public col13 As String
     Public col14 As String
     Public col15 As String
     Public col16 As String
End Structure
do you see what i mean?
but you cant initialise a Structure variable :)
if you try this you will get error

Code:

Public Structure ListViewItems Public col1 As String = "customer_name" 'Error Here End Structure Private items As New List(Of ListViewItems)

and i know if i made it in this way it will work

Code:

Public customer_id As String

but each time i have different column name so that why i want to get those name from Listview column name

hope see what i mean :)

Oct 26th, 2008, 05:24 PM
.paul.

Re: [2005] Save Listview items To Xml File
you know the column names at design time. its easy enough to type them out
vb Code:
```
Public Structure Customers
 
    Public customer_name As String
    'etc
End Structure
 
Private items As New List(Of Customers)
```
that way you'll get descriptive names in your xml file + probably get your column names when you read the xml into a dataset later.
Oct 26th, 2008, 05:39 PM
killer7k

Re: [2005] Save Listview items To Xml File

nope & that's problem that i'am trying to solve

here the situation so to see it well :

I have 2 Form right now
Form1: getting data & there is a listview there that show column for a specific table(everytime it change)
Form2 :it get column & row from selected listview table on form1

so if i theory it should be something like this

Code:

Public Structure Form1.lstvtable.SelectedItems.Item(0).Text Public col1 As String = Form1.lstvcolumn.SelectedItems.Item(0).Text 'the col1 should be name from lstvcolumn.SelectedItems.Item(0).Text that come from form1.... .... End Structure Private items As New List(Of Form1.lstvtable.SelectedItems.Item(0).Text)

but the problem is that it cant be written like this way :)

hope you understand me here well :)

Thanks
Oct 27th, 2008, 07:19 AM
obi1kenobi

Re: [2005] Save Listview items To Xml File

Why would it matter? It's only the name shown before the code is built... It might even be changed during building, so that the actual exe doesn't contain it at all... Why do you want it to be so?

Perhaps it could be done with runtime compilation, but it would most definitely be overkill in my book.
Oct 27th, 2008, 02:15 PM
killer7k

Re: [2005] Save Listview items To Xml File

i tought it was something easy :blush:
still not getting to work
Oct 27th, 2008, 02:29 PM
Siddharth Rout

Re: [2005] Save Listview items To Xml File

just a thought

Can't we create a dataset and then transfer it to an xml file?

for example after I copy data from listview to a dataset then wouldn't the below help?

Code:

Dim LSTItms As New DataSet() ' Write XML to file LSTItms.WriteXml("XMLFile.xml")
Oct 27th, 2008, 06:01 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by koolsid

just a thought

Can't we create a dataset and then transfer it to an xml file?

for example after I copy data from listview to a dataset then wouldn't the below help?

Code:

Dim LSTItms As New DataSet() ' Write XML to file LSTItms.WriteXml("XMLFile.xml")

Hi ,

how you will transfer columns & rows from Listview to Dataset ?
i'am using xml as way to access to dataset :)
Oct 28th, 2008, 06:59 PM
killer7k

Re: [2005] Save Listview items To Xml File

anyone has an idea ? :)
Oct 31st, 2008, 07:38 PM
killer7k

Re: [2005] Save Listview items To Xml File

I think there is no solution for it !!

btw thanks to paul and obi1kenobi for your help :)
Oct 31st, 2008, 07:47 PM
.paul.

Re: [2005] Save Listview items To Xml File

if you're loading the listview from a dataset, you could just write the dataset to xml, couldn't you?
where is the original data coming from?
Oct 31st, 2008, 07:57 PM
killer7k

Re: [2005] Save Listview items To Xml File

Quote:

Originally Posted by .paul.

if you're loading the listview from a dataset, you could just write the dataset to xml, couldn't you?
where is the original data coming from?

the data are coming from website & i want to arrive this data to dataset by Xml way :)

Re: [2005] Save Listview items To Xml File

ok. i tried a different tack. try this:

vb Code:

Dim ds As New DataSet
ds.Tables.Add("customer")
For x As Integer = 0 To ListView1.Columns.Count - 1
     ds.Tables("customer").Columns.Add(ListView1.Columns(x).Text, GetType(System.String))
Next
 
For Each item As ListViewItem In ListView1.Items
     Dim data(item.SubItems.Count - 1) As Object
     For x As Integer = 0 To item.SubItems.Count - 1
          data(x) = item.SubItems(x).Text
     Next
     ds.Tables("customer").LoadDataRow(data, True)
Next
ds.WriteXml("customers.xml")

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