Re: XML Serialization & Deserialization - C# Discussion Boards

Re: Sending and Receiving Data

Richard Beacroft11-Jun-04 6:55

Richard Beacroft

11-Jun-04 6:55

Thanx for all the help. You've given me lots of ideas.
I'm now reading up on them.

Thanx again.

Regards,
Rik

Any Idea

sreejith ss nair10-Jun-04 20:29

sreejith ss nair

10-Jun-04 20:29

hai there,

when ever i compile my application, i am getting an error in task list.

" Satellite build for culture 'fr' failed. Please see the output window for more detailed error information."

Why this ? any idea ?

Please feel free to contact.

Sreejith S S Nair - Bangalore

Re: Any Idea

Corinna John10-Jun-04 23:13

Corinna John

10-Jun-04 23:13

Two possible reasons:

- The ressource assembly could not be written, because a file with the same name is alread there and locked (in use or "read only").

- Some of the ressources cannot be found or accessed (files missing or files in use).

Re: Any Idea

Heath Stewart11-Jun-04 3:47

Heath Stewart

11-Jun-04 3:47

If it isn't what Corinna said, then please post what the detailed error information is. Without the error, it's difficult to say what the error really is.

Microsoft MVP, Visual C#
My Articles

Changing the look of a row of datagrid on mouseover

rajeev_mr10-Jun-04 19:34

rajeev_mr

10-Jun-04 19:34

Hi,

I have a datagrid populated with values.When i move over particular row over the grid the row of the grid should get highlighted and the it should also get enlarged. Any Help on this will be much appriciated.

Thanx & Regards,
Rajeev

Re: Changing the look of a row of datagrid on mouseover

Heath Stewart11-Jun-04 3:45

Heath Stewart

11-Jun-04 3:45

There's really no good way to do this. You need to implement custom DataGridColumnStyles to aid in this (since the existing ones either don't support background and foreground colors, or in the case of the DataGridTextBoxColumn, only show the TextBox (which would support the different colors) when the field is being edited).

So, you'd have to implement one (perhaps deriving from the existing DataGridBoolColumn and DataGridTextBoxColumn to save you from having to re-implement the features) with the properties necessary to change the appearance, which you'd have to override the Paint property and draw them yourself (so understanding how DataGridColumnStyles work is necessary - read the .NET Framework SDK).

Then, you have to handle the DataGrid.MouseMove event. In the handler, use the DataGrid.HitTest method to get the cell at the X and Y coordinates given in the MouseEventArgs. Get the DataGridColumnStyle for that cell and set those properties. This also means that when you move off the cell to another (or just off the DataGrid in general), that you have to reset the previous cell, which isn't an easy task.

With the amount of work involved, you might consider a third-party control that should already support this, like the XtraGrid from Developer Express[^]. Many third-party controls are very expensive and most are royalty-free.

Microsoft MVP, Visual C#
My Articles

XML Serialization & Deserialization

khchan10-Jun-04 18:40

khchan

10-Jun-04 18:40

Hi all,

I wanna serialize an object into an XML document. However the XmlSerializer Class doesn't handle the private data for me.

so I write the follow codes for serialization

XmlTextWriter writer = new XmlTextWriter(new StreamWriter("TestFile.txt"));
writer.Formatting = Formatting.Indented;
WriteQuote(writer, symbol, price, change, volume);
writer.Close();

static void WriteQuote(XmlWriter writer, string symbol,
double price, double change, long volume)
{
writer.WriteStartElement("Stock");
writer.WriteAttributeString("Symbol", symbol);
writer.WriteElementString("Price", XmlConvert.ToString(price));
writer.WriteElementString("Change", XmlConvert.ToString(change));
writer.WriteElementString("Volume", XmlConvert.ToString(volume));
writer.WriteEndElement();
}

and the following codes for deserialization

XmlTextReader reader = new XmlTextReader("TestFile.txt");
ReadQuote(reader);
reader.Close();

static void ReadQuote(XmlReader reader)
{
double price = 0, change = 0;
int volume = 0;
string attribute = "";

reader.MoveToContent();

while(reader.Read())
{
if(reader.Name == "Price")
price = Double.Parse(reader.ReadElementString());
if(reader.Name == "Change")
change = Double.Parse(reader.ReadElementString());
if(reader.Name == "Volume")
volume = Int32.Parse(reader.ReadElementString());
}

Is there any simpler way to do it?

Thanks Cool | :cool:

Re: XML Serialization & Deserialization

Heath Stewart11-Jun-04 3:37

Heath Stewart

11-Jun-04 3:37

If you read about XML Serialization in the .NET Framework SDK (i.e., on the XmlSerializer class), you'll see that only public properties and fields are serialized.

If you want to override this behavior, you can implement an undocumented, not-supported interface (meaning they could change it at any time) named IXmlSerializable. It's declared as follows:

public interface IXmlSerializable
{
  XmlSchema GetSchema();
  void ReadXml(XmlReader reader);
  void WriteXml(XmlWriter writer);
}

The actual type is System.Xml.Serialization.IXmlSerializable. Implement that and read and write what you need. Keep in mind that the XmlSerializer uses either the IXmlSerializable implementation, or uses the XML Serialization attributes, but not both (meaning if you use the attributes, you'll have to take them into account yourself using reflection).

Microsoft MVP, Visual C#
My Articles

adding a Menu bar log

samithas10-Jun-04 18:18

samithas

10-Jun-04 18:18

I want to add a logo to the top right of the menu bar (as in IE). How can I achieve this>...pls help Cry | :((

samitha

How does ImageIndex property works

luming112233445510-Jun-04 17:42

luming1122334455

10-Jun-04 17:42

ImageIndex is an int type
[C#]
public int ImageIndex {get; set;}

but in design time , at property grid it showed that was a Image with combobox, why? Confused | :confused:

if I want add the imageindex property like this in my new control,how to define it?

Re: How does ImageIndex property works

Nick Seng10-Jun-04 21:30

Nick Seng

10-Jun-04 21:30

lu ming wrote:
if I want add the imageindex property like this in my new control,how to define it?

add the Browsable(true) attribute to the property

"if you vote me down, I shall become more powerful than you can possibly imagine" - Michael P. Butler.

Re: How does ImageIndex property works

Heath Stewart11-Jun-04 3:30

Heath Stewart

11-Jun-04 3:30

That just tells the designer that the attribute is browsable, not how to edit the value. That's what a UITypeEditor is for, along with the EditorAttribute.

Microsoft MVP, Visual C#
My Articles

Re: How does ImageIndex property works

Heath Stewart11-Jun-04 3:29

Heath Stewart

11-Jun-04 3:29

You should look into the System.ComponentModel namespace, specifically the EditorAttribute and UITypeEditor classes.

There are some already created for you, but you need to follow certain guidelines. For starters, the class in which you would define an ImageIndex property must have a Parent property that references a Control with an ImageList property type (the property name doesn't matter). Then attribute your ImageIndex property like so:

[Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design", typeof(UITypeEditor)]
public int ImageIndex
{
  get { return imageIndex; }
  set { imageIndex = value; }
}

Here, imageIndex is a private field declared in your class to hold the value. Depending on how your component works, you may need to update the parent control.

If you don't follow these guidelines, you'll need to create your own UITypeEditor derivative.

Microsoft MVP, Visual C#
My Articles

Re: How does ImageIndex property works

luming112233445513-Jun-04 16:17

luming1122334455

13-Jun-04 16:17

Thanks Heath Stewart
under your answer,I found an article from here
http://www.codeproject.com/cs/media/extimageindexconv.asp
the red line must been added;

[Category("Appearance"), <br />
Description("..."), DefaultValue(-1)]<br />
[<font color="#FF0000">TypeConverter(typeof(ImageIndexConverter)), </font><br />
Editor("System.Windows.Forms.Design.ImageIndexEditor", typeof(UITypeEditor))]<br />
public int ImageIndex<br />
{<br />
  get <br />
  {<br />
    return _ImageIndex;<br />
  }<br />
  set<br />
  {<br />
     if (_ImageIndex = value)<br />
     {<br />
        _ImageIndex=value;<br />
     }<br />
  }<br />
}

I think if I changed the ImageIndexConverter to a Converter class which I designed , In desingn time , will it show my Converter in property grid?

Re: How does ImageIndex property works

Heath Stewart13-Jun-04 17:52

Heath Stewart

13-Jun-04 17:52

That's the idea, yes. Just make sure you reference the Type (either using typeof or a string representation, which is handy when you want to have a separate design-time assembly like Microsoft does for most members) in the ConverterAttribute.

Microsoft MVP, Visual C#
My Articles

incremental installation of C# application

ting66810-Jun-04 15:52

ting668

10-Jun-04 15:52

Hi all,

I would like to ask a question as below,

My software is composed of a main C# program with some other c# dll as components. In the first round, I will install all the stuff on the machine.
Then after sometime, I need to install some additional dll to work with
the main C# program. How can I do that ? Is that possible in C#.Net framework ?
The scenario is similiar to install Microsoft Office Suite, at the first time, I only install MS WORD with the MS Office main framework, but later I install also MS Excel (just like i install another DLL in my application)
onto the MS Office Main program on the PC.

Thanks

Re: incremental installation of C# application

Peter Vertes10-Jun-04 17:52

Peter Vertes

10-Jun-04 17:52

Yes it is possible but the initial design of your application will need to be carefully thought out. I'm actually working on a project that is very similar in nature to yours and we are using this method to develop more functionality to users over time and to patch specific parts of the system without actually going off-line.
The application we are writting is a trading application for different asset groups. We have a framework which compiles into an executable and all that framework does is authenticate the user again a database and see what permission the user has. GUI-wise the framework is just an MDI Parent window with a form that takes care of the login/authentication. When the user clicks on a menu only items that the user has permission to use appear as menu items. This is done with the combination of checking what DLL's are available on the remote server where all the DLL's reside on what the user has permission to access. So if a trader is an Equities trader he/she does not have access to Foreign Exchange screens/data so those images will not even appear inside the menu(s) of the framework.
All images that can run inside the framework are separate projects within the solution and produce DLL's into a common output directory (be careful because VS .NET is not too happy when you do this). When a bug is fixed and it's time to put the changes into the production system all we have to do is just move the newly updated DLL into a directory where the framework is expecting it and tell all the traders who need to use this updated image to close their existing image and open a new instance of it. I belive this is a very good way to design an application that will be used by many people since maintanance is very easy but on the down side it will take some time to "get it right" at first.

Re: incremental installation of C# application

Anonymous11-Jun-04 19:00

Anonymous

11-Jun-04 19:00

Yes,

" This is done with the combination of checking what DLL's are available on the remote server "

But I would like to know how to check what dll's are available on the remote server?

Problem using embedded WMP to play file in C#

Admiral Ackbar10-Jun-04 15:43

Admiral Ackbar

10-Jun-04 15:43

I'm following some of the tutorials at MSDN to embed Windows Media Player into my program. It's a simple problem. However, I can't seseem to get the controls to work. Even though I'm following the examples directly in the MSDN.

I declare the player and make it invisible and deactivate autostart:
private AxWMPLib.AxWindowsMediaPlayer axWindowsMediaPlayer1;
axWindowsMediaPlayer1.Visible=false;
axWindowsMediaPlayer1.settings.autoStart = false;

So that runs find. Then I open a dialog box, read a file and store it in the player:
axWindowsMediaPlayer1.URL = openFileDialog1.FileName;

So far so good. But when I try to run the controls it states that .controls is not part of the AxWMPLib.AxWindowsMediaPlayer. However, according to the documentation it clearly states at Microsoft that to stop I could...

axWindowsMediaPlayer1.controls.stop();

But the above code will not compile. I get the sneaking suspicion that somehow I'm messing up obkjects. Between all the player objects and media objects and everything else do I have the wrong object type?

I'm using WMP9 SDK. If anyone has a clue, or can give me a simple answer, I would be gretaly obliged.

Re: Problem using embedded WMP to play file in C#

User 96257810-Jun-04 17:21

User 962578

10-Jun-04 17:21

I had the same problem, i looked and looked and found that it was changed to Player.Ctlcontrols
so try axWindowsMediaPlayer1.Ctlcontrols to find play, stop, ect..

modified 16-May-21 21:01pm.

Re: Problem using embedded WMP to play file in C#

Admiral Ackbar11-Jun-04 2:33

Admiral Ackbar

11-Jun-04 2:33

I'll give that a try. Thanks...

Is it just me or does the MSDN archive suck?

Also.....

User 96257812-Jun-04 7:17

User 962578

12-Jun-04 7:17

There is another problem using Playlist.item[ index ] you will get an error, its also been cahnged to Playlist.get_Item[ index ]. All these problems have been documented in the WMP 10 SDK now which im playing with now.

modified 16-May-21 21:01pm.

Re: Also.....

Admiral Ackbar12-Jun-04 11:30

Admiral Ackbar

12-Jun-04 11:30

Okay cool... Now, I have the wmp sdk 9. Haven't updated to ten yet. Should I just assume the commands in 10 are mostly right for 9. Because even the 9 commands don't seem to work. for example, in 9 it states I can use:

player.cdromCollection.item(index).eject()

but that doesn't work. I have problems with item. So instead I tried:

player.cdromCollection.getByDriveSpecifier(drive).eject(); That works fine.

Re: Also.....

User 96257812-Jun-04 17:08

User 962578

12-Jun-04 17:08

Strange i just tried that and it worked ?

Player.cdromCollection.Item(0).eject();

I dont know if you cut and paste you code on the fourm but the "item" has to be "Item",uppercase I. Strange even in the WMP 9 SDK it has a lowercase 'i'.

Are you using Visual Studio .Net it should have that autocomplete feature so you can get the true objects (except that get_item, it doesnt show it?)

if not try borlands C# builder its free and just like VS. NET

modified 16-May-21 21:01pm.

Windows Services - Config App

AndyBewley10-Jun-04 12:41

AndyBewley

10-Jun-04 12:41

Hi All,

I've written a Windows Service (c#) which contains config params in a app.config.
I now need to extend it to offer a means to change the app.config via a winform.

The Question

Is it possible to add a winform to the service so that if the user executes the service executable by file selection, then it be launched as a normal winform app rather than the service?

I started writing a seperate app, but obviously the two apps don't share the target config file. Anybody know a clever way around that one?

Thanks in advance...
Andy

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