LinkedList XML serialization problem - C# Discussion Boards

Streaming With Flash media Encoder

1-Feb-08 8:45

I think you need to do some research on how to use a ListBox and possible GridView

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kibromg1-Feb-08 5:38

kibromg

1-Feb-08 5:38

Hi All,

I am trying to encode in to my website using Flash media encoder.
Can any one let me about the parameter in My object tag?

<object>
----code

thank you

Regards

Re: Streaming With Flash media Encoder

Pete O'Hanlon1-Feb-08 9:42

Pete O'Hanlon

1-Feb-08 9:42

kibromg wrote:
I am trying to encode in to my website using Flash media encoder.
Can any one let me about the parameter in My object tag?

Are you suffering from some wierd form of whiplash that prevents you from raising your eyes to the top of the page and see that this forum is about C#?

Deja View - the feeling that you've seen this post before.

My blog | My articles

Binding XML to TreeView - can't get it working?

espeholt_jr1-Feb-08 4:44

espeholt_jr

1-Feb-08 4:44

Should'nt the following code not work? I really can't see what's is wrong. I have debugged it, and know the xmldataprovider does contain the data. I have also tried to edit the XPath to other things. And yes, I have looked at other examples and can't figure out what's is wrong. The code works in XamlPad without modifications...

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:sys="clr-namespace:System;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<Page.DataContext>
<XmlDataProvider
XPath="/Accounts/*">
<x:XData>
<Accounts>
<Sum Use="Sum1">
<Account Use="Account1"/>
<Account Use="Account2"/>
</Sum>
<Sum Use="Sum2">
<Sum Use="Sum3">
<Account Use="Account3"/>
<Account Use="Account4"/>
</Sum>
<Account use="Account5"/>
</Sum>
</Accounts>
</x:XData>
</XmlDataProvider>
</Page.DataContext>
<Page.Resources>
<HierarchicalDataTemplate
DataType="Sum"
ItemsSource="{Binding}">
<TextBlock Text="{Binding XPath=@Use}" />
</HierarchicalDataTemplate>
<HierarchicalDataTemplate
DataType="Account"
ItemsSource="{Binding}">
<TextBlock Text="{Binding XPath=@Use}" />
</HierarchicalDataTemplate>
</Page.Resources>
<TreeView ItemsSource="{Binding}"/>
</Page>

Best regards
Lasse Espeholt

.net 2.0 multi selection drop down

arkiboys1-Feb-08 4:03

arkiboys

1-Feb-08 4:03

Hi,
In WinForm .net 2.0, is there a drop down control which allows multiple selections?
Drop down control seems to allow only for a single selection.
Thanks

Re: .net 2.0 multi selection drop down

Bijesh1-Feb-08 4:44

Bijesh

1-Feb-08 4:44

No, But you should be able to create one with some effort. Basically you would need to create a control, add in a combobox and a checked list box. Set combobox's ListControl property to the list box. You would need to keep track of selections separately and display it as comma separated text or something similar.

LinkedList XML serialization problem

Kosomot1-Feb-08 3:55

Kosomot

1-Feb-08 3:55

Hi,

I'm trying to serialize an object which contains an array of Objects, which holds in one of it's elements a generic LinkedList. And when I try to serialize the object, i get a InvalidOperationException, saying that "There was an error generating the XML document.", and no further details. Does anybody know what can cause this, and how to resolve it?

Here's the example code (doesn't work):

[XmlRoot()]
public class TestObj
{
    private Object[] array = new Object[2];

    public TestObj()
    {
    }

    [XmlArray()]
    public Object[] Items
    {
        get { return array; }
        set { array = value; }
    }
}

class Program
{
    static void Main(string[] args)
    {
        TestObj t = new TestObj();

        LinkedList<String> list = new LinkedList<string>();
        list.AddLast("abcdef");

        t.Items[0] = list;
        t.Items[1] = 123;

        XmlTextWriter wr = new XmlTextWriter("test.xml",Encoding.UTF8);
        XmlSerializer s = new XmlSerializer(typeof(TestObj));

        s.Serialize(wr, t); //throws the exception

        wr.Close();
    }
}

Re: LinkedList XML serialization problem

Skippums1-Feb-08 5:17

Skippums

1-Feb-08 5:17

Do the following:

[Serializable]
public class SerializableLinkedList<t> : LinkedList<t>, IXmlSerializable, ISerializable {
...
}
</t></t>

Then instantiate and use that class instead (in your example, the ISerializable interface is optional). Hope this helps,

Sounds like somebody's got a case of the Mondays

-Jeff

Re: LinkedList XML serialization problem

Kosomot1-Feb-08 7:29

Kosomot

1-Feb-08 7:29

Thanks for the reply,

The Serializable attribute and ISerializable are connected with regular serialization, not XML serialization. So marking the class as Serializable or implementing ISerializable won't solve the problem.

As for IXmlSerializable, it would probably work, but I would have to implement my own xml serialization routines for the LinkedList, which would lead to adding an amount of unnecessary code (and I would need to do the same for other collection classes, like List<> or Dictionary<>, which also cause the same problem), and it's not what I would want to do.

If I won't find any other way to solve this problem, I think I'll just use a BinaryFormatter to serialize this class.

Re: LinkedList XML serialization problem

Skippums1-Feb-08 8:33

Skippums

1-Feb-08 8:33

In my example, it is true that implementing ISerializable is unnecessary, but you would still have to implement the constructor that normally goes along with that interface (or you would get a deserialization error if you attempted binary serialization). I think that in the .Net 3.0 framework you can add extensions to classes that you would otherwise not have access to, so you may look into that if you have the 3.0 framework available to develop against. Using this methodology, you could add the methods implemented by IXmlSerializable to the actual collections, but I don't think you can add interfaces (like IXmlSerializable) to the inherited interfaces list. Anyway, good luck, and let us know if you do find an elegant way to go about this.

Sounds like somebody's got a case of the Mondays

-Jeff

Application on LAN

mehrdadc481-Feb-08 1:14

mehrdadc48

1-Feb-08 1:14

Hi,
I want to develpe a windows application that should be executable in a LAN.
a computer is as server, and another are clients.
Now, I develope it just a standalone application,i.e:
I install application on each client and instal SQL Server on Server and clients use IP address of Server in its Connectionstring
Or I should develope it in another approach?
I don't develope such application before that must be ran in LAN.

Best wishes

Re: Application on LAN

Not Active1-Feb-08 2:59

Save the selected items on txt file

1-Feb-08 2:59

You have the basic idea. It could get more complicated depending on the requirements.

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Strategic_Thinker1-Feb-08 1:11

1-Feb-08 1:11

Hello all:

When I was desin a form , it have many radio buttons , how can I save the selected items between the radio buttons on a txt file after I closed the form.

Thanks

Not Active1-Feb-08 2:57

1-Feb-08 2:57

Create the file
Write checkbox.checked value
Close the file

What part don't you understand or are having difficulties with?

only two letters away from being an asset

Strategic_Thinker1-Feb-08 3:44

1-Feb-08 3:44

Hi:

Sorry , I didn't mean that , when I run my form , inside it there are many radio buttons , when I choose a value , I want this value directly stored in a txt file ........

Thanks

Not Active1-Feb-08 4:07

1-Feb-08 4:07

Handle the selected event and write it to your file.

It would be nice also if you took out all the empty space on your signature line

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Strategic_Thinker1-Feb-08 4:49

1-Feb-08 4:49

Hello :

Thank you very much for your intersting , but can you give me an example to do that or explain the steps to do that ,please......

Thanks

Not Active1-Feb-08 4:58

1-Feb-08 4:58

How about at least try something on your own? What part are you having difficulties with? Handling an event? Writing to a file? What? These are not complex topics.

only two letters away from being an asset

J4amieC1-Feb-08 5:29

J4amieC

1-Feb-08 5:29

Mark Nischalke wrote:
What part are you having difficulties with

Perhaps it was the "taking all the empty lines out your sig" part. Roll eyes | :rolleyes:

Strategic_Thinker1-Feb-08 5:40

1-Feb-08 5:40

Hello :

I'll try it myself , but I want to know how can I start deal with handles and write to a file ......

Thanks

Not Active1-Feb-08 5:45

1-Feb-08 5:45

There is a little textbox at the top of the page, the one that has Search next to it. You should try it.

If you find that difficult, perhaps another career would be better.

Take the empty lines out of your signature.

only two letters away from being an asset

DaveyM691-Feb-08 7:26

DaveyM69

1-Feb-08 7:26

This should get you started.

void button1_Click(object sender, EventArgs e)
        {
            foreach (Control thisControl in Controls)
            {
                if (thisControl is RadioButton)
                {
                    RadioButton thisButton = (RadioButton)thisControl;
                    if (thisButton.Checked)
                    {
                        string path=Environment.GetFolderPath(
                            Environment.SpecialFolder.LocalApplicationData
                            ) + "\\test.txt";
                        TextWriter textWriter = new StreamWriter(path);
                        textWriter.WriteLine(thisButton.Name);
                        textWriter.Close();
                        Console.WriteLine("Data written to " + path);
                        break;
                    }
                }
            }
        }

Now use this to get yourself going and post back with a more specific issue if one arises - and alter that signature!

Not Active1-Feb-08 8:43

1-Feb-08 8:43

Rather than learning some very simple techniques, all he has to to do is copy your code. Hope you will always be around for him. Give him a fish, feed him for a day; teach him to fish...

only two letters away from being an asset