Changing Screen Resolution through C# - C# Discussion Boards

S. Senthil Kumar15-Dec-05 4:46

15-Dec-05 4:46

Assuming you're using WebClient and your proxy is using basic authentication, add the

Proxy-Authenticate[^] field to the Headers collection.

string base64 = Convert.ToBase64String(Encoding.ASCII.GetBytes("<username>:<password>"));
webClient.Headers.Add("Proxy-Authenticate", "Basic " + base64);

Or, you can use the NetworkCredential class to do it for you.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: proxi authentification

Camilo Sanchez28-Dec-05 13:14

Camilo Sanchez

28-Dec-05 13:14

before anyting thanks for your reply and have a happy new year
i was trying to understand what i was asking for and i couldnt understand a sh*t anyway
i either understang anthing of what you answer me
what i was trying to do was a web application that, using forms authentication authenticate users from a db and could even create new users
i wish you could tell me how can i do the first
thanks

Reading from Network & Writing Contents to a Local File

farhan197615-Dec-05 4:24

farhan1976

15-Dec-05 4:24

Hi,

I am trying to create an application which receives data from the network (probably a ZIP file) and write the content of network stream to the a LOCAL File... i can receive data and i can echo it out the console as well... i can write a file... but when i open up the file ... it has no content... what am i doing wrong?

here is the code:

private void readFile(int filesize)
{
try
{
FileStream fout = new FileStream(this.m_backupFileName,FileMode.CreateNew,FileAccess.Write);
NetworkStream ns = new NetworkStream(clientSock);

long rby=0;
int totalRecv=0;

//loop until the full bytes have been read
while( rby < filesize )
{
byte[] buff = new byte[1024];

//read from network stream
int i = ns.Read(buff,0,buff.Length);
Console.WriteLine(Encoding.ASCII.GetString(buff));
fout.Write(buff,0,i);
totalRecv += i;
rby = rby+1;
}
//done with reading
fout.Close();

//clientSock number of bytes
Console.WriteLine("Sending Num of Bytes");
clientSock.Send(Encoding.ASCII.GetBytes("DONE " + totalRecv.ToString()));

//get server's response
byte[] buf = new byte[128];

string resp = "";

clientSock.Receive(buf);

resp = Encoding.ASCII.GetString(buf);

if( resp == "OK" )
Console.Write("File Transfer Complete");
else if( resp == "ERROR")
Console.Write("Please Try Again");
}
catch(Exception ex) { Console.WriteLine(ex.ToString());}
}

DataView not returning the correct rows

gashach15-Dec-05 3:51

gashach

15-Dec-05 3:51

I am using a typed dataset to store my data. I use a dataView to pull out what i need. the problem comes up in one case. I have a dataView that does not return what it should.

The DV init is:

<br />
DataView mDv = new DataView(ds.tblData, "(issent = false AND userIDN = " + userID + ") OR pending_draws = true","dataID", DataViewRowState.CurrentRows);<br />

If i run the same parameters in a SQL query it returns the correct rows. any ideas?

File.Create method isn't releasing the file

kornstyle15-Dec-05 3:26

kornstyle

15-Dec-05 3:26

I am using the File.Create method to create a text file. My problem is that when I need to write to that file after it has been created I get the error message "The process cannot access the file "C:\2005 Sim R4 MedAlu Data\TN.txt" because it is being used by another process.".

Re: File.Create method isn't releasing the file

Ingo15-Dec-05 3:49

Ingo

15-Dec-05 3:49

You must derive a FileStream von the Create method:
FileStream fs = File.Create("C:\2005 Sim R4 MedAlu Data\TN.txt");

After that you can access the FileStream:
fs.Write("Your Data");
and finally close it.
fs.Close();

-- modified at 9:49 Thursday 15th December, 2005

Re: File.Create method isn't releasing the file

Polis Pilavas15-Dec-05 3:51

Polis Pilavas

15-Dec-05 3:51

What code are you using? I suspect that you didn't call the Close() method right after you created the file. We can't do much without seeing the actual code you use. But anyways, here's a sample code I use when creating/writing text files:

FileStream <code>fs</code> = null;
string <code>tmpFile</code> = "C:\\sample.txt";

// Create file  and close it so that it can be re-opened for writing further on
<code>fs</code> = File.Create(<code>tmpFile</code>, 1024);
<code>fs.Close();</code>

// Prepare file  for writing by assigning a new textWriter to it
TextWriter <code>wr</code> = new StreamWriter(<code>tmpFile</code>);

// Write stuff into the file
<code>wr.WriteLine("Stuff 1");
wr.WriteLine("Stuff 2");
wr.WriteLine("Blah blah blah......");</code>

// Eventually close the file
<code>wr.Close();</code>

Regards,
Polis

Can you practice what you teach?

-- modified at 9:53 Thursday 15th December, 2005

Changing Screen Resolution through C#

thepolishguy15-Dec-05 3:19

thepolishguy

15-Dec-05 3:19

I want to provide operators of my C# software the opportunity to change screen resolution to optimal settings (1024x768) for viewing this particular software. How do I change screen resolution (and maintain those changed settings), should the user opt to do so?

-- modified at 11:08 Tuesday 20th December, 2005

I should have added the following. The computer that will be running the program is, in this case, a dedicated machine. It's purpose is basically to run the software I'm developing. As such, it makes a certain sense to have the display settings optimal for the particular application-should the operator opt to set them that way. The operator is under no obligation to set the computer to those optimal settings and will have the option to not see the message box again after the initial run of the program.

Re: Changing Screen Resolution through C#

Andy Moore15-Dec-05 3:35

Andy Moore

15-Dec-05 3:35

You can do this by using P/Invoke to access the Win32 API from your C# code. Have a look at the ChangeDisplaySettings function and the DEVMODE structure. You will need to create the DEVMODE structure in your code and use DllImport to call ChangeDisplaySettings. The following link documents the DEVMODE structure.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/prntspol_8nle.asp[^]

I hope this helps.

Human beings were not meant to sit in little cubicles staring at computer screens all day, filling out useless forms and listening to eight different bosses drone on about about mission statements. -- Peter Gibbons

Re: Changing Screen Resolution through C#

Dave Kreskowiak15-Dec-05 6:18

Dave Kreskowiak

15-Dec-05 6:18

What you're doing is not recommended, and, in fact, actively discouraged. Changing system-wide settings affects other applications that are running and also affects the layout of the desktop. Remember, Windows is a shared system, running multiple applications at once. You have to make sure you app works and plays nice with others. Changing system-wide settings so your app looks good, can make another app running at the same time look bad.

I know if you did that to my machine while I'm working in Maya at 1900x1440, I'd be heading straight for Add/Remove Programs and dumping your app.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Changing Screen Resolution through C#

Dan Neely16-Dec-05 3:16

Dan Neely

16-Dec-05 3:16

Dave Kreskowiak wrote:
I know if you did that to my machine while I'm working in Maya at 1900x1440, I'd be heading straight for Add/Remove Programs and dumping your app.

In general, agreed. THe only time forcing a resolution should be allowed is in full screen mode, and then be sure to restore the settings when the user closes or alt-tabs out of your program.

faxing from C# via Send Fax Wizard

cobra200515-Dec-05 3:00

cobra2005

15-Dec-05 3:00

I want to initiate the sending of a fax from within a C# application. I want to specify the file I want to send and then launch the Send Fax Wizard allowing the user to type in the fax number, the To, etc... Does anyone know how to do this? I noticed that Send Fax Wizard does not allow for attaching files. I was able to send faxes bypassing the Send Fax Wizard all together, but that's not entirely what I need.

Many thanks.

tom d

Re: faxing from C# via Send Fax Wizard

albCode15-Dec-05 6:13

albCode

15-Dec-05 6:13

here is one example

http://www.interfax.net/en/dev/c.html

Re: faxing from C# via Send Fax Wizard

cobra200515-Dec-05 6:31

cobra2005

15-Dec-05 6:31

Thanks, but that's not entirely what I need. I need to use the Send Fax windows client and prompt the user for fax number, location, etc, etc. Any ideas would be greately appreciated.

cobra2005

Re: faxing from C# via Send Fax Wizard

albCode15-Dec-05 6:43

albCode

15-Dec-05 6:43

try this

http://www.codeproject.com/isapi/aspfax.asp

Re: faxing from C# via Send Fax Wizard

cobra200515-Dec-05 8:02

cobra2005

15-Dec-05 8:02

The link you've indicated has to do with sending a fax from a web page. All I want to do use COM-Object (faxcom.dll) to fax a PDF document. I want to "attach" the document to the object and fire up the Send Fax Wizard.

cobra2005

Changing all cursor types on a form

fracalifa15-Dec-05 2:51

fracalifa

15-Dec-05 2:51

Hello everybody,

I want to change the cursors over all input controls (textboxes) on a form in a loop.
I tried something like:

foreach(TextBox tb in formclassname) // but instead of a class a var is expected
{
   tb.Cursor = Cursors.No;       // change cursor of textboxes
}

What's the right code to make the expected operation ?
Thank you in advance

Frank

-- modified at 11:45 Thursday 15th December, 2005

Re: Changing all cursor types on a form

Polis Pilavas15-Dec-05 3:41

Polis Pilavas

15-Dec-05 3:41

Assuming you are trying to change the cursors from within the form that the textboxes are on, you can try something like this:

foreach (Control tmp in this.Controls)
	if (tmp is TextBox)
		tmp.Cursor = Cursors.Hand;

Or like this:

foreach (Control tmp in this.Controls)
	if (tmp.GetType().Name == "TextBox")
		tmp.Cursor = Cursors.Hand;

Regards,
Polis

Can you practice what you teach?

Re: Changing all cursor types on a form

fracalifa15-Dec-05 5:50

fracalifa

15-Dec-05 5:50

Thank's

that's what I'm looking for.

Frank

Extend NumericUpDown

yala15-Dec-05 1:43

yala

15-Dec-05 1:43

I would like to use a NumericUpDown and add the unit (feet, ...) after the number.
This is made by extending the NumericUpDown class and overriding the UpdateEditText method like that:
protected override void UpdateEditText()
{
//Let the base component format the number according to the different properties
base.UpdateEditText();
//Add the unit
base.ChangingText = true;
base.Text = base.Text + " " + unit;
base.ChangingText = false;
}

But the problem is when a user change a part of the text in the textbox,
the ParseEditText method cannot parse a string like "2 feet",
and i cannot override this method like it is not virtual or abstract in the base class (Why did Microsoft do that?).

Please help me to find a solution.

Thanks in advance

Database migration tool

AnonymousTwo15-Dec-05 1:34

AnonymousTwo

15-Dec-05 1:34

Hello,

I have a task to write a tool that converts the structure of a sybase database to postgre database. What are the steps I need to follow to do such converter tool? Please help with ideas and examples if possible !

Thanks

PreprocessKEy message DATAGRID column

Greeky15-Dec-05 0:40

Greeky

15-Dec-05 0:40

in my extended datagridcolumn i press tab , cursor jumps 2 cells :S

I think i can solve this problem with using PreprocessKey message but i dont know how to write code, could anyone show a sample?

Excel in C#

Mahi.Ragava15-Dec-05 0:27

Mahi.Ragava

15-Dec-05 0:27

Hi friends,

Am transforming datas from one excel file to another using OleDbReader....

While this,the datas are transferred but the datatypes couldnt be...

How can i do it?

Am using OleDbReader to read the tableschema.....

Kindly Help.....

Thanx....

event handling

Ankit Aneja14-Dec-05 23:34

Ankit Aneja

14-Dec-05 23:34

i am using com dll in my project which fires up event

code in vb is like this
Option Explicit
Dim WithEvents p As CLAMXLib.ClamEngine
Dim mresult As ClamResult

Private Sub p_OnScanComplete(ByVal result As CLAMXLib.IClamResult)
Set mresult = result
End Sub

in c#

CLAMXLib.ClamEngine p;
ClamResult mResult;

//now how will i catch events

code of class where i have to catch up event
public class clamresults
{
CLAMXLib.ClamEngine p;
ClamResult mResult;
public clamresults()
{
//
// TODO: Add constructor logic here
//
p=new ClamEngineClass();
p.Database.Path="E:\\projects backup\\ankitclam backup\\Clamtest\\database\\";

}
public string loadDatabase(string command,string dirpath)
{

if(command=="SCAN")
{
mResult=scanfile(dirpath);
}
else if(command=="RAWSCAN")
{
mResult=scanBuffer(dirpath);
}
else if(command=="CONTSCAN")
{
mResult=scandir(dirpath);
}

return mResult.Summary;

}
public ClamResult scandir(string dirpath)
{
p.Settings.ScanSupport=ClamSupport.Scan_Standard;
mResult= p.ScanDirectory(dirpath,0,ClamBoolType.False ,ClamBoolType.True);
return mResult;

}
public ClamResult scanfile(string dirpath)
{
p.Settings.ScanSupport=ClamSupport.Scan_Standard;
mResult=p.ScanFile(dirpath,ClamBoolType.True);
return mResult;

}
public ClamResult scanBuffer(string dirpath)
{
mResult=p.ScanBuffer(dirpath,ClamBoolType.False);
return mResult;
}

}

now how and where i will catch up events which will be generated from com dll

Ankit Aneja
"Nothing is impossible. The word itself says - I M possible"

-- modified at 6:23 Thursday 15th December, 2005

Object pooling in C#

rana7414-Dec-05 23:07

rana74

14-Dec-05 23:07

We have a c# object being referred to by ASP.NET application.We want to implement an object pool for the C# component,with the number of intances being configurable.
Assuming that ASP.NET is servicing requests in 25 concurrent threads,we want the services to be processed by the instances from the pool.
Moreover ,the instances are initialized right at the beginning.How do we implement this object pooling?
We need this architecture as the c# object contains a handle to a COM component which has a very expensive initialization process.
A pointer to a reference article will be very helpful

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