C# Discussion Boards - CodeProject

Re: Posting event or invoking callbacks on main thread

Jim Crafton6-Jun-08 9:15

Jim Crafton

6-Jun-08 9:15

led mike wrote:
Depends how you define "OK". polling is certainly not best practice.

True.

I've given up on the command line version. I just made a simple UI that minimizes to the system tray. This gives me a form I can use BeginInvoke on and things seem to be working better now. Still awfully silly.

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Serialize and deserialize with extra types

Eric Burns6-Jun-08 3:46

Eric Burns

6-Jun-08 3:46

I am serializing a class that has an array of type Base.

The type of each of these items is actually a subclass of Base (many different types).

To avoid requiring the Base class to know about all the subclasses, using [XmlInclude] (since this isn't an option for me since some of the subclasses are dynamically compiled and not known at compilation time), when I create the serializer, I pass an array of types like so:

XmlSerializer serial = new XmlSerializer( typeOfObjectToBeSerialized, extraTypesArray );

That works great. I can then use the same serializer to deserialize the file. Wonderful. . . .

Except . . . in practice, I'm not deserializing immediately after serializing. I wrote it out to a file because I want to save the state and be able to shut down the program, come back later and deserialize it. At that point, I no longer have that extraTypesArray, and it can't deserialize without it.

Does anybody have a clever solution to this problem? The only thing I can think to do add a load of strings to the beginning of the xml file and pull them out at the beginning, turn them into types somehow, and use them to create the serializer. But I'm hoping for something cleaner. Any ideas?

Re: Serialize and deserialize with extra types

leppie6-Jun-08 4:42

leppie

6-Jun-08 4:42

Eric Burns wrote:
But I'm hoping for something cleaner. Any ideas?

Nope, that's XmlSerialization for you.

Just as tip, you only need to include one type per assembly. Example, I needed something in System.dll, so I simply added an enum type as the extra types, and it worked. Maybe this will work for you as well.

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How to create notification icon (icon neer the windows clock ) in C# ?

Yanshof6-Jun-08 3:21

Yanshof

6-Jun-08 3:21

Hi,

I writing some windows Form application in and when the user is minimize the Main form i want to show some notification icon near the windows clock.

How can i do it ?

Re: How to create notification icon (icon neer the windows clock ) in C# ?

Gareth H6-Jun-08 3:28

Gareth H

6-Jun-08 3:28

Yanshof,

MSDN?[^]

Regards,
Gareth.

(FKA gareth111)

Re: How to create notification icon (icon neer the windows clock ) in C# ?

leppie6-Jun-08 4:43

leppie

6-Jun-08 4:43

How about actually giving an answer for once, and not just a link to MSDN? Post a little about the page you are linking to.

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Re: How to create notification icon (icon near the windows clock ) in C# ?

Yanshof6-Jun-08 4:57

Yanshof

6-Jun-08 4:57

Thanks for the help -

That was what i looking for - but how can i remove the application from the task bar and see the application only as Troy icon ?

I did as same as was in the example - and i see that the application in the troy and in the task bar also ...

Thanks for the help

Re: How to create notification icon (icon near the windows clock ) in C# ?

eggsovereasy6-Jun-08 7:14

eggsovereasy

6-Jun-08 7:14

There is a property on the form called ShowInTaskbar... set it to false.

how to convert this into c#

prasadbuddhika6-Jun-08 2:50

prasadbuddhika

6-Jun-08 2:50

i want to convert this code to c#.

Dim btn As Button = CType(sender, Button)

i tried with
btn as button;
Convert.changetype(sender,button);
but it gives an error saying that button is a type and used as a variable

Re: how to convert this into c#

Guffa6-Jun-08 2:54

Guffa

6-Jun-08 2:54

Button btn = (Button)sender;

Despite everything, the person most likely to be fooling you next is yourself.

Re: how to convert this into c#

Vasudevan Deepak Kumar6-Jun-08 3:36

Vasudevan Deepak Kumar

6-Jun-08 3:36

Guffa wrote:
Button btn = (Button)sender;

And one like (if (sender.GetType().Name == "Button")) would make it generic and exception-resistant. I am actually trying to see how to avoid the System.InvalidCastException The specified cast is not valid.

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Re: how to convert this into c#

Gareth H6-Jun-08 3:41

Gareth H

6-Jun-08 3:41

Vasudevan Deepak Kumar,

One word. YUK!

Button btn = sender as Button;
If (btn == null)
 return;

//carry on and do whatever you want

Regards,
Gareth.

(FKA gareth111)

Re: how to convert this into c#

Brady Kelly6-Jun-08 4:12

Brady Kelly

6-Jun-08 4:12

Gareth H wrote:
One word. YUK!

I'll second that. Dead | X|

I actually felt nauseas for a second or two.

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Re: how to convert this into c#

CPallini6-Jun-08 3:49

CPallini

6-Jun-08 3:49

what about:

if ( sender is Button )
{
  // here cast allowed
}

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Re: how to convert this into c#

Pete O'Hanlon6-Jun-08 3:49

Pete O'Hanlon

6-Jun-08 3:49

prasadbuddhika wrote:
Dim btn As Button = CType(sender, Button)

Try this:

Button btn = sender as Button;
if (btn != null)
{
  // Do my button work here.
}

Basically, if you cast an object using Button btn = (Button)sender; you end up with an exception if sender isn't a button (or child of said type). The "as" keyword, attempts the cast and leaves it as null if can't complete the cast - hence the null test. There is a third option, but it's a bit wasteful:

Button btn = null;
if (sender is Button)
  btn = (Button)sender;

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sending remainder mail at regular intervals

fakeer4uever6-Jun-08 2:02

fakeer4uever

6-Jun-08 2:02

Hi all,

In my project, i wish to send a remaider email to the users at regular intervals.

please help me with a sample code.

thanks
Fakeer

"FAKEER"

Re: sending remainder mail at regular intervals

Ashfield6-Jun-08 2:27

Ashfield

6-Jun-08 2:27

Just put your email send in a timer event.

Bob
Ashfield Consultants Ltd

Re: sending remainder mail at regular intervals

Russell Jones6-Jun-08 2:52

Russell Jones

6-Jun-08 2:52

you'll need to use % operator

Re: sending remainder mail at regular intervals

Gareth H6-Jun-08 3:20

Gareth H

6-Jun-08 3:20

fakeer4uever,

What is a at "regular intervals"?

Every minute? or every 3 days?, or even longer...

Regards,
Gareth.

(FKA gareth111)

Re: sending remainder mail at regular intervals

Vasudevan Deepak Kumar6-Jun-08 3:40

Vasudevan Deepak Kumar

6-Jun-08 3:40

You may need to use a Windows Service to achieve this.

Re: sending remainder mail at regular intervals

#realJSOP6-Jun-08 3:44

#realJSOP

6-Jun-08 3:44

Here's some sample code:

while (true)
{
    SendRemaiderEmail();
}

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Transmission of Video File

DeepOceans6-Jun-08 1:24

DeepOceans

6-Jun-08 1:24

Hi,
I'm transmitting recorded video file over LAN using UDP but sometimes file transmit successfully and sometimes at receiving side(client) it doesn't receive properly whereas at server side I get transmitting message.
Please See my code and give me suggestion to overcome this problem.

 public void filercvold()<br />
            {                         <br />
               <br />
            outStream = File.OpenWrite(filepath);<br />
            bufOutStream = new BufferedStream(outStream);<br />
               <br />
             i=0;<br />
            while (i<=fsize)//fsize is filesize<br />
            {<br />
                try<br />
                {<br />
                 <br />
                        <br />
                 idsock.ReceiveFrom(rcvfilebuf, ref idep);<br />
                       <br />
               bufOutStream.Write(rcvfilebuf, 0, rcvfilebuf.Length);<br />
                     <br />
                  i++;<br />
            <br />
                }<br />
                catch (SocketException ttt)<br />
                {<br />
                    MessageBox.Show(ttt.Message);<br />
                }<br />
                       <br />
            }<br />
           <br />
            bufOutStream.Flush();<br />
            bufOutStream.Close();                     <br />
            outStream.Close();            <br />
            MessageBox.Show("File is completly received!!");<br />
}

//outStream is FileStream Object
//bufOutStream is BufferedStream Object
idsock is socket object
// rcvfilebuf = new byte[16384]; 16KB packet
Now whenever I got last msg "File is completly received" File fully saved and run properly. but when I dont get this msg as at server side I got transmitting msg but at same time at client side above notification doesn't show as client become stuck or remain in this statement " ReceiveFrom(rcvfilebuf, ref idep);"
Now tell me how to check this or rcv full video every time as it doesnt happen everytime.By same code I got this msg and run video file at client but by same code above problem I face so what is main reason or where I'm doing wrong.
Thanx in advance.
Regards,

Shanzay

Re: Transmission of Video File

#realJSOP6-Jun-08 1:41

#realJSOP

6-Jun-08 1:41

Without seeing all of the related code, we probably can't help you.

using Microsoft.Office.Interop.Word.Document

ShimnaMukundan6-Jun-08 1:24

ShimnaMukundan

6-Jun-08 1:24

Hi All,

According to my requirement i need to get the webpagepreview of the active word document in a new window. Can anyone help with this...

This is my code

protected Microsoft.Office.Interop.Word.ApplicationClass objWord = new ApplicationClass();
object fltDocFormat = 10;
protected object missing = System.Reflection.Missing.Value;
protected object readOnly = false;
protected object isVisible = false;
object FileName //The path where i stored the file
objWord.Documents.Open(ref FileName, ref readOnly, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing, ref missing, ref missing, ref missing, ref missing);
Microsoft.Office.Interop.Word.Document oDoc = objWord.ActiveDocument;
oDoc.WebPagePreview();
objWord.Quit(ref missing, ref missing, ref missing);

The preview is coming in the same window i need it in a new browser window

Plz help

Start Window Services

Tejal Bhavsar6-Jun-08 1:08

Tejal Bhavsar

6-Jun-08 1:08

Hi All,

I have made one Window services using C#.net.
My Problem is that i can't start service on my PC. It gives me error like this

Cannot start service WinService1 on computer '.'.

Can you please tell me why this error is occured?

Thanks,
Himal

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