C# Discussion Boards - CodeProject

Steve Messer9-Dec-05 7:23

9-Dec-05 7:23

I didn't think that this question was appropriate for the ASP.NET forum but I will mention it in this question.

I currently have an ASP.NET page that receives an XML stream which I write to disk.

StreamReader reader = new StreamReader(Request.InputStream);
string xmlData = reader.ReadToEnd();
...
StreamWriter writer = new StreamWriter( "Somefile.xnl, false);

writer.Write( xmlData );
writer.Flush();
writer.Close();

I would like to have this functionality using a Web service instead of an ASP page.

It is possible to use a web service to receive posts in this fashion?

Any pointers appreciated

Re: Web service question

Ista11-Dec-05 11:35

Ista

11-Dec-05 11:35

yes. send a stream to it and save it

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: Web service question

Steve Messer11-Dec-05 11:42

Steve Messer

11-Dec-05 11:42

Would you care to elaborate a little.

I am very new to web services. My team lead is wanting me to do this without a IIS server even running.

What do you mean by send a steam to it? Then how do you save it, how does the webservice get hold of the stream.

Note: I have no control of how the stream is sent to me. I give them a url to post to and they send me an stream formated as xml.

Thanks

Re: Web service question

Ista11-Dec-05 14:07

Ista

11-Dec-05 14:07

Okay. define the web services as a memory stream

like maybe

public void SendMyData( MemoryStream ms )
{
// Write the text to the file here
}

So the user will call your web service and send them stream to you. And you can what you want with it.

Your PC will have the IIS on it so any PC that has IIS can hold the web service. Not having a web server to deploy is just crazy!

But the programs will simply locate your WSDL file and they will see they need to send a Stream to it.

You don't have to use a memory stream, it's just one I use a lot. Play with it.

When you create the web service it creates the WSDL. So Create another app and click Add Web References and find the wsdl then call it. Its easy

If you need help I will up for for another 3 hours

Nick

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: Web service question

Steve Messer11-Dec-05 15:13

Steve Messer

11-Dec-05 15:13

I follow what you are saying.

I realize that not having a web server to deploy it crazy, but I have been asked to look into this method.

The problem that we are trying to get around it the limitation of IIS 5 running on XP, which is 10 conncurrent connections. Of course this could be solved by switching to 2003 server and IIS 6 but that is not the exercise.

Given that explanation is there a way to do what my team lead wants, even if it's insane, I need to go back to him with some answers.

Again in a nut shell here is what he wants.

1) create a web service independent of a IIS server.
2) have this web service receive the data sent my our client.

It seems to this that this would require socket programming as I don't see how a web service could receive streams without a server.

Thanks

Re: Web service question

Ista11-Dec-05 15:43

Ista

11-Dec-05 15:43

well a web service is a (web) and is know way independent of IIS.

You could host IIS on a win2k machine. It doesn't have to be a server.

Now you can imitate the web service by doing remoting. and just open a port or listen on port 80 for data coming through. After all, a web service wraps remoting.

Its a simple concept but you'll need to practice it.

http://www.csharphelp.com/archives2/archive422.html[^]

I would say set up a win2k machine that doesn't exhibit such behavior. If not, do remoting but it will be a learning curve.

Its a shame when companies do this over a few dollars. Hes going to spend more in the long run.

Make sure you do tons of exception handling.

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: Web service question

Steve Messer11-Dec-05 19:05

Steve Messer

11-Dec-05 19:05

Thanks for the information.

I don't believe it's over a few bucks, I believe he has two motivations.

1. He is from a non-Microsoft background... and he doesn't want to use ISS any version on any
machine.
2. He wants to find a way for the client to send info directly to our application with out a
middle man or web server.

I am with you. Why reinvent the wheel. I will look at the remoting to make our point to him.

Cheers

How to Filter data table

kotteeswaran9-Dec-05 6:59

kotteeswaran

9-Dec-05 6:59

Hi,
Im a new guy in C# dev. I need to develop a component The requirement is..

I will be fetching a recordset from database which is of type dataset.(no problem for me here)

I will be taking the datatable out of the dataset which is having four coloumns..ie OrderID,OrderDate,ItemName,ItemID.

The requirement is to generate a XML file for each OrderID in the datatable.
One OrderID may be associated with Multiple ItemID and ItemName...

I need to filter out the table so the i take One OrderID and associated coloumns(orderdate,ItemID,ItemName) and send those values to other method cof generating the XML string.

Here im having some trouble , How to filter out and form the child table which is having One orderID and other values?..

Please give some eg code

thanks in advance
kotteesh

Happy coding!!

kotteeswaran

Re: How to Filter data table

Guffa9-Dec-05 7:09

Guffa

9-Dec-05 7:09

Create a DataView for the table.

---
b { font-weight: normal; }

Re: How to Filter data table

kotteeswaran9-Dec-05 7:11

kotteeswaran

9-Dec-05 7:11

Guffa,

Can you give some sample code or link

thanks

Happy coding!!

kotteeswaran

Re: How to Filter data table

Guffa9-Dec-05 7:19

Guffa

9-Dec-05 7:19

MSDN: DataView Constructor (DataTable, String, String, DataViewRowState)[^]

---
b { font-weight: normal; }

RichTextBox - Sending "zoomed" output to bitmap

FinallyInSeattle9-Dec-05 6:24

FinallyInSeattle

9-Dec-05 6:24

I have code that allows me to basically write the contents of a richtextbox to a bitmap (sending a EM_FORMATRANGE using SendMessage). This code works fine, but it always draws the text "normal size" regardless of the setting of ZoomFactor in the RichTextBox. How can I get the "zoomed" verison of the text into a bitmap?

Thanks in advance!

Re: RichTextBox - Sending &quot;zoomed&quot; output to bitmap

Polis Pilavas9-Dec-05 12:03

Polis Pilavas

9-Dec-05 12:03

Why don't you try zooming into the extracted bitmap? Let me know if you need the code to zoom into an existing bitmap

Regards,
Polis

Can you practice what you teach?

Re: RichTextBox - Sending &amp;quot;zoomed&amp;quot; output to bitmap

FinallyInSeattle9-Dec-05 12:07

FinallyInSeattle

9-Dec-05 12:07

Hi Polis,

I'm interested in the "zoomed" output of the RichTextBox because it does a nice job of scaling the fonts rather than the "blocky" output of scaling a bitmap. Is this what you're referring to?

Thanks!
Lori

Polis Pilavas wrote:
Why don't you try zooming into the extracted bitmap? Let me know if you need the code to zoom into an existing bitmap

Re: RichTextBox - Sending &amp;amp;quot;zoomed&amp;amp;quot; output to bitmap

Polis Pilavas9-Dec-05 12:11

Polis Pilavas

9-Dec-05 12:11

Hey Lori,

No, what I was referring to was to zoom into the image after it's extracted. Sorry I can't help you with that since I don't know how you get the bitmap in first place.

If I were you, most probably I would extract the bitmap like you do, then zoom into the whole image, and crop out the parts I wouldn't want to show.

Regards,
Polis

Can you practice what you teach?

Adding Rows To Data Set

jasonwinn9-Dec-05 5:33

jasonwinn

9-Dec-05 5:33

Hello there!
I have been working on this and cannot get it to work for the life of me. I am simply just trying to add rows to a dataset.

I recieve no errors. The datatable does update when I click refresh, but I do not see the rows added.

Can anyone please help me where I have gone wrong?

RCIDBphase1DataSet RCIDB = new RCIDBphase1DataSet();

private void submitbutton_Click(object sender, EventArgs e)
{

RCIDB.jobintake.Rows.Add("test", "test");

RCIDBphase1DataSet.EnforceConstraints = false;
RCIDB.jobintake.AcceptChanges();
this.jobintakeTableAdapter.Fill(this.RCIDBphase1DataSet.jobintake);
RefreshDataset();
}

private void RefreshDataset()
{
this.jobintakeTableAdapter.Fill(this.RCIDBphase1DataSet.jobintake);
}

-- modified at 11:37 Friday 9th December, 2005

Re: Adding Rows To Data Set

Polis Pilavas9-Dec-05 12:05

Polis Pilavas

9-Dec-05 12:05

Did you try taking a look here[^]?

Regards,
Polis

Can you practice what you teach?

TCP Socket Problems

c#guy38119-Dec-05 4:20

c#guy3811

9-Dec-05 4:20

I have a client/server relationship which I use to update files on connected users' computers. It uses Asynchronous Socket operations and sends binary data over TCP sockets. The connections are maintained indefinately until the client or server disconnects, or a client encounters an error and closes the connection. The problem I am having is that after a few days, the server stops sending messages to its clients. The number of clients right now is about 20-25, which are connected at all times. I see from the message logs that it is receiveing client requests, but it is not sending a response to those clients. The server is set to send updates at 12:30 AM every day, but after about 4 days it stops sending anything. I know it would be helpful to have the code, but not knowing where exactly the problem is, it is hard to post code, and there is A LOT of it.

Any ideas on what the problem may be are appreciated. Thanks in advance!

Re: TCP Socket Problems

Ista9-Dec-05 16:24

Ista

9-Dec-05 16:24

I fixed this problem once.

I can't remember the solution, but I think I had a thread to keep it alive. Becuase the CLR tries to shut it down after a certain period of time.

Nick

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: TCP Socket Problems

Ista9-Dec-05 16:26

Ista

9-Dec-05 16:26

I would also attach and event counters to it, to see if the OS is shutting it down and something sporadic isd happening.

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: TCP Socket Problems

mcljava12-Dec-05 8:13

mcljava

12-Dec-05 8:13

Beware of IP address changes. If your clients are DHCP based and the IP resets at somepoint during your conenction then you will have a problem. For example if your DHCP address lease is for 3 days then you might want to visit that.

Also, make sure your read logic in the server and client is looking for its corresponding peer to drop. I.E. if recv() returns 0 or if a SocketException occurs, depending on how your code is structured. The application should free up any socket related resources and return to a steady state. For the server, this means listebing for new connections. For the client, either exiting or initiating a connection retry sequence.

Finally have you stress tested your server? How long can it sustain a constant message flow? If the answer is not indefinitely then you might want to revist the server code to make it moe robust. If it were me, I would make sure the server is 100% bullet proof under load to understand how it performs and what to expect in terms of client communication. Remember any test harness you build should use the same client connection logic. Once you nail that down consider creating a library so that you can build client applications w/o fussing with the connection details.

Mike Luster

Re: TCP Socket Problems

c#guy381112-Dec-05 9:02

c#guy3811

12-Dec-05 9:02

The clients and servers both use a .dll for connection/send/rcv data. The server assigns the new socket to an ArrayList when a client connects, and gives the client an associated number. When a client disconnects, the server removes the client at the ClientNumber position in the ArrayList, then updates all necessary ClientNumbers to the correct position. While the update is going on, the server is suspended, IE, it can not accept new connections until the update is complete.

The client dll backend catches an error, performs cleanup procedures, then trys to reconnect at a random interval. The connect/disconnect portion of the program isnt the problem. Even when the server hangs it still accepts/disconnects.

IP Addresses are static. That shouldnt be a problem. Im beginning to think that it may be some of the other software running on the actual server with my server program. I think the backup software is locking the database when the server tries to update file listings. When I came in this morning, the ListView telling me what the current files were was empty, suggesting it failed contacting the database. If that is the case, then when it tries sending files, it wont have any references in the DataSets, and will simply return from the function without sending anything. Ill keep everyone informed incase the problem may come up with someone else.

Closing form ControlBox

zaboboa9-Dec-05 3:42

zaboboa

9-Dec-05 3:42

Hello,

Is there a way when we close the form using X (top right corner of the form on the ControlBox), to make it act as a cancel event, when I press Cancel button on this form. In other words, to run cancel button event?

Thank you

Re: Closing form ControlBox

kobymeir9-Dec-05 8:42

kobymeir

9-Dec-05 8:42

every form has two properties :

AcceptButton:
called when the user press "ENTER".
and the button appears differently.

CancelButton

called when the user press "ESC" or click the close button.

in both cases the form calls the click event of the according button.

hope i helped Wink | ;)

Pls. Help anyone

bry_quin9-Dec-05 3:15

bry_quin

9-Dec-05 3:15

Hi to everyone!

I just want to ask if it is possible to make an application that all its inputs will appear on MS Word.. I mean if I type Hello on the application, it would automatically appear in MS Word.. If it is can someone tell me how.. thanks a lot

bryz

-- modified at 9:18 Friday 9th December, 2005

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