Re: how to add lists - C# Discussion Boards

Re: how to add lists

coded0076-Dec-11 22:11

coded007

6-Dec-11 22:11

I need some more clarity on "What exactly you want to do ?"

Re: how to add lists

saurabh001 m6-Dec-11 22:21

saurabh001 m

6-Dec-11 22:21

CD contains chart data for one analysis which is used to generate charts based on analysis you did. CDA , CDB ... each nested class containing data to generate one chart. i mean CDA for one chart . CDB for 2nd chart.. CDC for 3rd chart...... like this..
Now client wants to generate charts by selecting two or more analysis.
So now i am struggling to find out how can I add data for multiple analysis.

Is it clear or i need to elaborate more

Re: how to add lists

Richard MacCutchan6-Dec-11 22:22

Richard MacCutchan

6-Dec-11 22:22

saurabh001 wrote:
I want to add these 3 lists....

Add them to what? To each other, then just create a new list and add each one to the new list. To some other list or object ... ?

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: how to add lists

saurabh001 m6-Dec-11 22:23

saurabh001 m

6-Dec-11 22:23

yes.. Add them to new list ..

Re: how to add lists

Richard MacCutchan6-Dec-11 23:15

Richard MacCutchan

6-Dec-11 23:15

Adding lists is a simple matter (see here[^]), what is your difficulty?

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: how to add lists

OriginalGriff6-Dec-11 22:36

OriginalGriff

6-Dec-11 22:36

Use the List<T>.AddRange function - it will add all the elements of any IEmumerable to a List<T>

List<string> l1 = new List<string>();
...
List<string> l2 = new List<string>();
...
l2.AddRange(l1)

;

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

Re: how to add lists

saurabh001 m6-Dec-11 22:58

saurabh001 m

6-Dec-11 22:58

Hi OriginalGriff,

I dont want to append list. i want sum

Regards
Saurabh

Re: how to add lists

BillWoodruff7-Dec-11 10:11

BillWoodruff

7-Dec-11 10:11

I suggest you repost this here, or on C# QA, with a code example clearly showing the structure of the Lists, and clearly showing exactly what the final result's structure (another List ?) should be, and telling us, clearly, how the final result is composed from the outermost Classes, using the innermost Classes, and their inner Properties (of Type: List of doubles).

From what you've disclosed here, we can only make "wild guesses" at the underlying structure like:

public class CD 
{
    // constructor code ?
    public CD(?) {?}

    public class CDA 
    {
       // constructor code ?
       public CDA(?) {?}

       public List<double> cda1 {get; set;}
       public List<double> cda2 {get; set;}
       // and so on ...
    }

    public class CDB {}
    public class CDC {}
}
//
public List1<CD> list1 = new List<CD>();
public List2<CD> list2 = new List<CD>();
public List3<CD> list3 = new List<CD>();
//
// some function that fills all the Lists, and inner Lists, and the inner property Lists of Type double, or is a database involved here ? database query result ?
//
// the result ?
public List<CD> SumOfLists = // using Linq ?

You need to clarify exactly what you mean by "nested." And, is inheritance used in any way here ?

"Anyone who shows me my 'blind spots' gives me the gift of sight." ... a thought from the shallows of the deeply shallow mind of ... Bill

Email Exception Catching

AmbiguousName6-Dec-11 20:48

AmbiguousName

6-Dec-11 20:48

hello guys... I have got this email program from internet, which works absolutely fine. But I wanna catch exceptions when something goes wrong, and I dont know what to catch. Here is the program

SmtpClient client = new SmtpClient("smtp.gmail.com");
client.Port = 587;
client.EnableSsl = true;
client.Credentials = new System.Net.NetworkCredential("username@gmail.com", "password");

MailMessage msg;
MailAddress from;
MailAddress to;

from = new MailAddress("From Email Address", "my name here", System.Text.Encoding.UTF8);
to = new MailAddress("To Email Address");

msg = new MailMessage(from, to);
msg.Body = txtBody.Text;
msg.Body += Environment.NewLine;
msg.BodyEncoding = System.Text.Encoding.UTF8;
msg.Subject = txtSubject.Text;
msg.SubjectEncoding = System.Text.Encoding.UTF8;
client.Send(msg);
msg.Dispose();

thnx for any suggestions.

Re: Email Exception Catching

Wayne Gaylard6-Dec-11 21:18

Wayne Gaylard

6-Dec-11 21:18

You should at least catch an SmptException, which will be thrown if for any reason the email was unable to be sent. You can use the SmtpStatusCode enum to find out the reason, something like this:_

try
      {
          client.Send(message);
      }
      catch (SmtpException ex)
      {
         MessageBox.Show(String.Format("Error: {0}", ex.StatusCode));
      }

Hope this helps

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

Re: Email Exception Catching

AmbiguousName6-Dec-11 21:47

AmbiguousName

6-Dec-11 21:47

Here is what I do.

string RetMsg = string.Empty;
try
{
  client.Send(message);
  RetMsg = "Success";
}
catch (SmtpException ex)
{
  RetMsg = String.Format("Error: {0}", ex.StatusCode);
}

MessageBox.Show(RetMsg);

Now I receiver's email address something like: "address@yaho.com". You see there is problem with the mail address? But it still shows me Success. What's wrong?

Re: Email Exception Catching

Richard MacCutchan6-Dec-11 22:19

Richard MacCutchan

6-Dec-11 22:19

There is nothing wrong with that email address; there may well be a domain out there called yaho.com. However, if that domain does not exist the SMTP system will send you a message telling you that the email is undeliverable; but that will not cause an exception in your code.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Email Exception Catching

Wayne Gaylard6-Dec-11 22:20

Wayne Gaylard

6-Dec-11 22:20

SmtpClient has no conception of correct email addresses. It will send the message to any address you type in, regardless of whether it is a correct address or not. You will only get notification that the sending failed from your smtp server. If you want to send messages to correct email addresses, you will need to construct your own validation routine, using something like regular expressions or a list of known(authorised) addresses, and pass all messages through that first before sending.

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

Re: Email Exception Catching

Dan Mos6-Dec-11 22:25

Dan Mos

6-Dec-11 22:25

that's not good enough. You should use sendasync coupled with a completeCallback.

Then you should have the error/delivery failure. That depends on the SMTP Mail server itself that you are using. See here

All the best,

Dan

Serialization Problem

Kevin Marois6-Dec-11 13:45

Kevin Marois

6-Dec-11 13:45

I have 3 classes:

[Serializable]
public class _ModelBase
{
    public Guid Id { get; set; }
    public string Caption { get; set; }
    public string Description { get; set; }
    public bool IsActive { get; set; }
    public int Sequence { get; set; }
    public ImageSource Image { get; set; }
}

and

[Serializable]
public class FolderModel : _ModelBase
{
    public List<FolderModel> Folders { get; set; }
    public List<FileModel> Files { get; set; }
    public bool IsExpanded { get; set; }

    public FolderModel()
    {
        Folders = new List<FolderModel>();
        Files = new List<FileModel>();
    }
}

and

[Serializable]
public class FileModel : _ModelBase
{
    public string FileName { get; set; }
}

I'm trying to serialize a a collection of FolderModels and FileModels:

private void saveAppDataToFile()
{
    using (TextWriter textWriter = new StreamWriter(xmlDataFile))
    {
        XmlSerializer serializer = new XmlSerializer(typeof(FolderModel));
        serializer.Serialize(textWriter, Folders);
        textWriter.Close();
    }
}

I'm gettng the runtime error

"There was an error generating the XML document."

"Unable to cast object of type 'System.Collections.Generic.List`1[MyApp.Models.FolderModel]' to type 'MyApp.Models.FolderModel'"}

I can't figure out why this won't work. Anyone see what's wrong?

Thanks

Everything makes sense in someone's mind

Re: Serialization Problem

BillWoodruff6-Dec-11 16:30

BillWoodruff

6-Dec-11 16:30

Kevin Marois wrote:
a collection of FolderModels and FileModels

I think it would be useful to see the structure/definition of that Collection.

"Anyone who shows me my 'blind spots' gives me the gift of sight." ... a thought from the shallows of the deeply shallow mind of ... Bill

Re: Serialization Problem

Mycroft Holmes6-Dec-11 19:20

Mycroft Holmes

6-Dec-11 19:20

I think there is an issue around the xml serialising of complex object, your List<>s make this a complex object. There are literally dozens of alternative serialisers and many articles written on the subject.

Never underestimate the power of human stupidity
RAH

Re: Serialization Problem

Dan Mos6-Dec-11 20:50

Dan Mos

6-Dec-11 20:50

Yeah just like ~~Microft~~ Mycroft Holmes said. It doesn't let you serialize a collection.
Instead use a foreach and serialize each folder indivitually.

Something like:

using (TextWriter textWriter = new StreamWriter(xmlDataFile))
   {
       XmlSerializer serializer = new XmlSerializer(typeof(FolderModel));
       foreach(folder in Folders) serializer.Serialize(textWriter, folder);
       textWriter.Close();
   }

All the best,

Dan

Re: Serialization Problem

Pete O'Hanlon6-Dec-11 20:59

Pete O'Hanlon

6-Dec-11 20:59

This is a fairly simple one to fix and the error is actually pretty helpful. You told the serializer that you were going to serialize FolderModel but you then try to serialize a list of FolderModel instead.

Forgive your enemies - it messes with their heads

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Serialization Problem

Kevin Marois7-Dec-11 5:22

Kevin Marois

7-Dec-11 5:22

SLAP!

That's the sound of me slapping myself.

Thanks!

Everything makes sense in someone's mind

Re: Serialization Problem

Pete O'Hanlon7-Dec-11 5:25

Pete O'Hanlon

7-Dec-11 5:25

Hey, no problem. If I hadn't made a similar mistake several thousand times, I'd probably have missed it.

Forgive your enemies - it messes with their heads

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Serialization Problem

BillWoodruff7-Dec-11 10:34

BillWoodruff

7-Dec-11 10:34

I find this code a challenge to understand because it appears to me there's a circular (recursive) reference inherent in the structure of the FolderModel class.

Assuming there's no recursion inherent in the data structure itself: all he has to do is to call:

serializer.Serialize(textWriter, FolderModel1);

And that's it ?

Your brilliance is shining through again Smile | :)

thanks, Bill

"Anyone who shows me my 'blind spots' gives me the gift of sight." ... a thought from the shallows of the deeply shallow mind of ... Bill

How to fetch the user filled fields in PDF form

Ravi k rao6-Dec-11 9:58

Ravi k rao

6-Dec-11 9:58

Hi all,

I got some user filled PDF forms, from there i need to extract the user filled data.Is there any possible way using C# other than 3rd party tool?
Thanks in advance

Re: How to fetch the user filled fields in PDF form

Not Active6-Dec-11 11:54

Not Active

6-Dec-11 11:54

No, there is no native support for PDF files built-in to .NET. You'll need to use one of the many 3rd party libraries.

No comment

Re: How to fetch the user filled fields in PDF form

Wonde Tadesse6-Dec-11 13:09

Wonde Tadesse

6-Dec-11 13:09

Have a look at this article.Extract All Form Fields From Pdf File Using C # and IText Sharp Library[^]

Wonde Tadesse
MCTS

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