Write to file a List<type>

**Adam Benson** · Nov 5 '08, 12:15 PM

Re: Write to file a List<type&gt ;

List<won't serialize. You need to write some code to manually serialize
it.

Something like :

MyList<T: List<T>
{

#region Manual serialization
public virtual void GetObjectData(S erializationInf o info,
StreamingContex t context)
{
int i = 0;
info.AddValue(" num", this.Count);
foreach (T item in this)
{
info.AddValue(" item" + i.ToString(), item);
++i;
}
}

protected MyList(Serializ ationInfo info, StreamingContex t context)
{
int num = info.GetInt32(" num");
for (int i = 0; i < num; ++i)
{
T item = (T)info.GetValu e("item" + i.ToString(), typeof(T));
base.Add(item);
}
}
#endregion Manual serialization
}

HTH,

Adam,
=========

"A.Rocha" <armandorocha@i fthensoftware.c omwrote in message
news:899AFB3F-CF4B-467C-8CE7-3CBEA32A89A7@mi crosoft.com...

Hi,
>
I need save to text file a List<type>, but i dont wont serialize.
>
//
List<mytypemyLi st = new List<mytype>();
>
anyone can help me?
>
--
Best regards,
A.Rocha

**Stanimir Stoyanov** · Nov 5 '08, 12:55 PM

Re: Write to file a List<type&gt ;

I personally would not serialize the data but rather list it in a text file,
especially if the case assumes that the data can be edited by users outside
the application. The I/O functions would save and read chunks of data (the
List<Trecords).

Some key points we need to know to give an appropriate answer:
- What kind of data does the list store? e.g. proprietary format, text or
binary data
- Do you want the output to be editable by you or your users outside your
program?
--
Stanimir Stoyanov
http://stoyanoff.info

"Adam Benson" <Adam.Benson@NO SPAMMYSPAM.omni bus.co.ukwrote in message
news:%2373sC8zP JHA.4008@TK2MSF TNGP02.phx.gbl. ..

List<won't serialize. You need to write some code to manually serialize
it.
>
Something like :
>
MyList<T: List<T>
{
>
#region Manual serialization
public virtual void GetObjectData(S erializationInf o info,
StreamingContex t context)
{
int i = 0;
info.AddValue(" num", this.Count);
foreach (T item in this)
{
info.AddValue(" item" + i.ToString(), item);
++i;
}
}
>
protected MyList(Serializ ationInfo info, StreamingContex t context)
{
int num = info.GetInt32(" num");
for (int i = 0; i < num; ++i)
{
T item = (T)info.GetValu e("item" + i.ToString(),
typeof(T));
base.Add(item);
}
}
#endregion Manual serialization
}
>
HTH,
>
Adam,
=========
>
>
"A.Rocha" <armandorocha@i fthensoftware.c omwrote in message
news:899AFB3F-CF4B-467C-8CE7-3CBEA32A89A7@mi crosoft.com...

>Hi,
>>
>I need save to text file a List<type>, but i dont wont serialize.
>>
>//
>List<mytypemyL ist = new List<mytype>();
>>
>anyone can help me?
>>
>--
>Best regards,
>A.Rocha

>
>

**A.Rocha** · Nov 5 '08, 02:15 PM

Re: Write to file a List<type&gt ;

Hi Stanimir ,

//This is my class:

public class Info
{
public long ID;
public string A;
public float B;
public float C;
public int D;
public float E;
public string F;
public float G;
public string H;
public short I;

public Info(){ }

public Info(long ID, string A, float B, float C, int D, float E,
string F, float G, string H, short I)
{
this.ID= ID;
this.A= A;
this.B= B;
this.C= C;
this.D= D;
this.E= E;
this.F= F;
this.G= G;
this.H= H;
this.I= I;
}
}

//this is my List<Info>
List<InfoaInfo= new List<Info>();

//i add several items to List
aInfo.Add(new cInfoPOS(ID, A, B, C, D, E, F, G, H, I));
....
....

Now i want to save this in text file. The output is only edited by the
program.

Thanks for any help.

--
Best regards,
A.Rocha
(Portugal)

"Stanimir Stoyanov" <stoyanov@REMOV ETHIS.live.come screveu na mensagem
news:16C1B42B-B938-4DCC-8C38-834B86E11391@mi crosoft.com...

>I personally would not serialize the data but rather list it in a text
>file, especially if the case assumes that the data can be edited by users
>outside the application. The I/O functions would save and read chunks of
>data (the List<Trecords).
>
Some key points we need to know to give an appropriate answer:
- What kind of data does the list store? e.g. proprietary format, text or
binary data
- Do you want the output to be editable by you or your users outside your
program?
--
Stanimir Stoyanov
http://stoyanoff.info
>
"Adam Benson" <Adam.Benson@NO SPAMMYSPAM.omni bus.co.ukwrote in message
news:%2373sC8zP JHA.4008@TK2MSF TNGP02.phx.gbl. ..

>List<won't serialize. You need to write some code to manually serialize
>it.
>>
>Something like :
>>
>MyList<T: List<T>
>{
>>
> #region Manual serialization
> public virtual void GetObjectData(S erializationInf o info,
>StreamingConte xt context)
> {
> int i = 0;
> info.AddValue(" num", this.Count);
> foreach (T item in this)
> {
> info.AddValue(" item" + i.ToString(), item);
> ++i;
> }
> }
>>
> protected MyList(Serializ ationInfo info, StreamingContex t context)
> {
> int num = info.GetInt32(" num");
> for (int i = 0; i < num; ++i)
> {
> T item = (T)info.GetValu e("item" + i.ToString(),
>typeof(T));
> base.Add(item);
> }
> }
> #endregion Manual serialization
>}
>>
>HTH,
>>
>Adam,
>=========
>>
>>
>"A.Rocha" <armandorocha@i fthensoftware.c omwrote in message
>news:899AFB3 F-CF4B-467C-8CE7-3CBEA32A89A7@mi crosoft.com...

>>Hi,
>>>
>>I need save to text file a List<type>, but i dont wont serialize.
>>>
>>//
>>List<mytypemy List = new List<mytype>();
>>>
>>anyone can help me?
>>>
>>--
>>Best regards,
>>A.Rocha

>>
>>

>

**Jeff Johnson** · Nov 5 '08, 03:05 PM

Re: Write to file a List<type&gt ;

"A.Rocha" <armandorocha@i fthensoftware.c omwrote in message
news:899AFB3F-CF4B-467C-8CE7-3CBEA32A89A7@mi crosoft.com...

I need save to text file a List<type>, but i dont wont serialize.

The last part of that sentence is unclear. Did you misspell "want," and you
meant to say "I don't want to use serialization"? Or did you mean "it won't
serialize"?

If you don't want to use .NET's serialization then you're going to have to
write the values in your class manually, using either a BinaryWriter or a
StreamWriter. The choice will depend on whether you want all your data to be
in plain text or a more compact binary format.

**Alberto Poblacion** · Nov 5 '08, 03:05 PM

Re: Write to file a List<type&gt ;

"Adam Benson" <Adam.Benson@NO SPAMMYSPAM.omni bus.co.ukwrote in message
news:%2373sC8zP JHA.4008@TK2MSF TNGP02.phx.gbl. ..

List<won't serialize. You need to write some code to manually serialize
it.

Why wouldn't it serialize? List<Tis marked as Serializable. It should
serialize with no problem, on the condition that the class "T" is itself
marked as Serializable.

Another alternative is to use the XmlSerializer, which will produce a
nicely strutured XML text file from a List<Info>, given the "Info" class
that the OP has shown in a separate message.

**A.Rocha** · Nov 5 '08, 03:55 PM

Re: Write to file a List<type&gt ;

Hi,

sorry for only now i tell you that, but i'm working on compact framework 3.5
on windows Mobile 6.0, that's why i can't marke it as Serializable.

Thanks.
--
Best regards,
A.Rocha
(Portugal)

"Jeff Johnson" <i.get@enough.s pamescreveu na mensagem
news:%23k0QJb1P JHA.728@TK2MSFT NGP05.phx.gbl.. .

"A.Rocha" <armandorocha@i fthensoftware.c omwrote in message
news:899AFB3F-CF4B-467C-8CE7-3CBEA32A89A7@mi crosoft.com...
>

>I need save to text file a List<type>, but i dont wont serialize.

>
The last part of that sentence is unclear. Did you misspell "want," and
you meant to say "I don't want to use serialization"? Or did you mean "it
won't serialize"?
>
If you don't want to use .NET's serialization then you're going to have to
write the values in your class manually, using either a BinaryWriter or a
StreamWriter. The choice will depend on whether you want all your data to
be in plain text or a more compact binary format.
>

Write to file a List<type>

Write to file a List<type>

Comment

Comment

Comment

Comment

Comment

Comment