C# Discussion Boards - CodeProject

Anand Mudliar12-Dec-04 7:01

12-Dec-04 7:01

Hi,
Purpose: I want to store any web page as html file.
Solution: Call GetResponse to the specified web site and download it.

Code:
public void Download( string url)
{

// Get the URI from the command line.
Uri httpSite = new Uri(url);

// Create the request object.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(httpSite);
req.ContentType = "text/html";
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.0.3705; .NET CLR 1.1.4322)";

req.KeepAlive = false;
req.ProtocolVersion=HttpVersion.Version11;
req.Method = "GET";
req.AllowAutoRedirect=true;
req.MaximumAutomaticRedirections=100;
req.Timeout=(int) new TimeSpan(0,0,60).TotalMilliseconds;
req.Credentials = CredentialCache.DefaultCredentials;

Stream ResponseStream = null;
HttpWebResponse resp = null;
// Call EndGetResponse, which produces the WebResponse object
// that came from the request issued above.
try
{
resp = (HttpWebResponse)req.GetResponse();
// Find the data size from the headers.
string strContentLength = resp.Headers["Content-Length"];
// Read the content here...
// .....
}
catch(Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
if (ResponseStream != null)
ResponseStream.Close();
}
}

The above function works fine on some websites, but on some website where lots of redirection exists it throws 401 error.

Can somebody throw some light on what might be the root cause of this? I tried many options e.g. setting the authorization code as a part of header etc.

Also if you set Autoredirection propertyl of webrequest to false then it dosen't throw any error but the content returned is empty (0 length).

Thanks,
Anand

How to call a MouseEvent from a KeyBoard Event

manivannan.p12-Dec-04 6:24

manivannan.p

12-Dec-04 6:24

hello,am a new user to C# sharp. when i use a datetimepicker ( format set to short), along with some more controls in a form, the first time i executed the project, Iam able to get the focus in the Datetimepicker control(by pressing tab).

But if u select a new value in the control and use tab again am not getting the focus in datetime control. IS THIS A PATCH IN DATETIME CONTROL?

But when u click on it , the mousedown event makes the selection. so, iam thinking of invoking the mousedown evnet in the Enter Event(when the control is active by pressing tab). But not sure how to do it. or is there any other way of achiveing this?

Please help me at the earliest. Much Thanks.

Regards,Manivannan.P

fatal execution engine error

sharonz12-Dec-04 5:16

sharonz

12-Dec-04 5:16

Hi,

I have a very strange problem. I'm working with C# on Windows 2000.
The problem involves my module which is a dll.
When I try to debug, when I go over certain lines of code (not always the same one) the program exits and I see in the Output window:

Fatal execution engine error.
The program '[2976] <name>' has exited with code 0 (0x0).

Now to the strange part. It never happens if there are no breakpoints in the code.
It also doesn't happen if I'm running my dll from a test program in the same solution, only from another place.

More clues: What I see is that the debugger reaches the breakpoint, prepares to stop (I see the yellow highlight) and then crashes. It doesn't enter the function in that line. Another clue is that the function is usually a getter of a connection from another class (the connection exists - it is static), but it doesn't crash there if there s no breakpoint on it or if I debug through it. as I said it doesn't enter the function.

It was a bit long, but I will be really glad if someone could help me,
Thanks!

Simulating Ctrl+c

Paladin5912-Dec-04 4:47

Paladin59

12-Dec-04 4:47

Hello,I want to be able to highlight a text and then run my program,which will simulate a Ctrl+c action so the text will be inserted into the clipboard.
Thanks in advance!

Re: Simulating Ctrl+c

Hmitosh12-Dec-04 21:12

Hmitosh

12-Dec-04 21:12

Use the SenKeys.Send function, you have to pass by a string which is formatted in a special way. i dont have it in my head, for instance pushing down Alt and down arrow at the same time should be written

SendKeys.Send("%{DOWN}")

% represents Alt

Regards

Hmitosh

Re: Simulating Ctrl+c

Paladin5913-Dec-04 20:04

Paladin59

13-Dec-04 20:04

Thanks for the help,but the problem now is that the Ctrl+c is sent to the running application.. let's say I'm using IE,I want to be able to highlight a word,press an icon that will acivate my program which will simulate ctrl+c and insert the selected word from IE to the clipBoard. I read something about changing the focus,is that a valid solution? and how is it done? thanks!

Followup: CLR Hosting startup time

Uwe Keim11-Dec-04 23:44

Uwe Keim

11-Dec-04 23:44

After getting very good answers on my question regarding "Calling C# functions from a DLL from within unmanaged C++" [^], I successfully decided to do CLR Hosting [^] and quickly got very good results implementing a usable wrapper around that CLR Hosting stuff.

So it all works very good except the startup time when I load the assembly with my code for the very first time only (through (_AppDomain::CreateInstance()). Subsequent loads into a new host in the same running applications load fast.

Question: Is there a way to speed up creating an assembly instance?

E.g. when I start a .NET only application the application starts instantly, much faster than when I create the instance inside my .NET host. Maybe there is some "default" CLR floating around in the Windows system that I can re-use inside my .NET host instead of creating a new one?

--
Affordable Windows-based CMS: www.zeta-producer.com

Microsoft Winform

Ray Hurst11-Dec-04 22:43

Ray Hurst

11-Dec-04 22:43

Hey...I downloaded some code that uses System.Winform but my system complains that a Winform doesn't exist in the Sytem namespace.
I downloaded the .NET 2.0 Beta and the .NET SDK and it still doesn't exist. Where does the Winform object come from?

Re: Microsoft Winform

leppie12-Dec-04 0:39

leppie

12-Dec-04 0:39

That was the System.Windows.Forms namespace prior to .NET 1.0 being released, just change it,and it should work.

^{top secret
Download xacc-ide 0.0.3 now!
See some screenshots}

Strange Problem

Moon Boy11-Dec-04 8:49

Moon Boy

11-Dec-04 8:49

Hi,

Well, i have 4 Threads, they call the same function to send a File using HttpWebRequest.
I need to send the four photos at the same time.

The function is called at the same time, but only sends 2 at same time :\

Why?

<br />
byte[] buffer = new Byte[256]; <br />
int bytesRead = 0;<br />
while ( (bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0 )<br />
{<br />
				requestStream.Write(buffer, 0, bytesRead);<br />
<br />
progress.Value += bytesRead;<br />
}<br />

Thanks.

Re: Strange Problem

leppie11-Dec-04 21:00

leppie

11-Dec-04 21:00

This is HTTP 1.1 limitations, HTTP 1.0 allows for 4 connections. Im not sure how to get around this, you see the same behaviour in IE.

^{top secret
Download xacc-ide 0.0.3 now!
See some screenshots}

Re: Strange Problem

Anonymous13-Dec-04 6:03

Anonymous

13-Dec-04 6:03

There is actually a registry hack for it.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]<br />
"MaxConnectionsPer1_0Server"=dword:00000019<br />
"MaxConnectionsPerServer"=dword:00000019

That should allow up to 10 simultaneous streams.

Getting rid of unwished Systemsounds

Hmitosh11-Dec-04 6:36

Hmitosh

11-Dec-04 6:36

Or more specifically i want to get rid of the systemsound when the cursor is in a textbox and you hit the enter key, windows will automaticly play a soundeffect according to the soundeffect that is selected as standardsound (see controlpanel -> Sound and Sound devices -> Scroll down to Standard sound option). I suppose this sound can be useful when you want to notify the user, that the enter key is not applicable in a textbox, in my case however the enter key is supposed to work as an alternative to the tabkey. So in this case it's very annoying having to listening to that soundeffect each time.

I can always deselect the sound from the soundsetting dialogue in controlpanel, however this selection will reflect the whole system and remove the sound in all other cases where this sound occurs and that is not my intention, i just want to remove it from my application. Does anyone know how to solve this?

Re: Getting rid of unwished Systemsounds

Daniel Turini11-Dec-04 21:22

Daniel Turini

11-Dec-04 21:22

Not exactly the easiest thing in the programming world:
Read this[^] to understand how system sound notification occurs and (maybe) how to prevent them.

Yes, even I am blogging now!

Re: Getting rid of unwished Systemsounds

Skynyrd12-Dec-04 9:30

Skynyrd

12-Dec-04 9:30

I wouldn't go into changing sound events in the host's OS. Best solution is creating an inherited TextBox and overriding the ProcessDialogKey method:

public Class MyTextBox: TextBox
{
...
protected override bool ProcessDialogKey(Keys keyData)
{
if (keyData==Keys.Enter)
{
if (!this.Multiline)
{
ProcessDialogKey(Keys.Tab);
return true;
}
}
return base.ProcessDialogKey (keyData);
}
...
}

This will enable the enter key as a Tab input. I think its what ur looking for. Just add MyTextBoxes to your form instead of normal TextBoxes and ur all set.

Re: Getting rid of unwished Systemsounds

Hmitosh13-Dec-04 5:09

Hmitosh

13-Dec-04 5:09

That is beautiful Skynryd, that really solved my problem.

Thanks a lot

Regards

Hmitosh

Re: Getting rid of unwished Systemsounds

Skynyrd13-Dec-04 5:55

Skynyrd

13-Dec-04 5:55

Welcome

query a crystal report

steve_rm11-Dec-04 5:41

steve_rm

11-Dec-04 5:41

Hello,

I have the following query below that l want executed using crystall reports from the form by clicking on a button.

In VB 6 this was very easy to do with the datareport as you could execute any type of query on the form and display it in the datareport. But l am not sure how to do this in crystall report.

Is there anyway to write this query behind a command button and pass it to the crystall report. I hope you understand what l mean.

string queryOverdueBooks = @"SELECT RefNumber, Title, DateOut, DateDue
FROM Book
WHERE DateDue < '" + currentDate +"' ";

Many thanks in advance,

Steve

C# Reference

nagajim11-Dec-04 2:57

nagajim

11-Dec-04 2:57

I am hoping to use #Develop to write some C# code but am struggling to get started. Confused | :confused:

Where can I get information on things like "Windows Forms & Properties" - ie Syntax, Use, Descriptions and Modifiers?

Are there other such references that I will need to be aware of (and if so where do I find them) - eg Graphics, File Handling, etc.

My programming experience to date has been Fortran, Pascal, Basic some C and some Assembler Blush | :O

- this is my first foray into the realm of IDE and C# Confused | :confused:

Any advice/help/pointers would be gratefully appreciated. Smile | :)

Many Thanks,
NagaJim

Re: C# Reference

Nick Parker11-Dec-04 18:19

Nick Parker

11-Dec-04 18:19

Regardless of the IDE that you are using the definative source should be the documentation. MSDN[^] is always a great source to start with and if you are looking to learn specifically about C#, check out the Visual C# Language Specification[^], and also the Visual C# Developer Center[^]. HTH

- Nick Parker
My Blog | My Articles

Setting the toolbar's background transparented

yyylny11-Dec-04 1:25

yyylny

11-Dec-04 1:25

Hello,
I'm a c#.NET developer and I want to have a toolbar control in my application that has a transparented background. Can I do it? I know that the toolbar doesn't support the transparented BackColor property. Is there another way to do it?

Thanks

Re: Setting the toolbar's background transparented

lj_rules12-Dec-04 20:51

lj_rules

12-Dec-04 20:51

Maybe you can try creating a custom toolbox control using group boxes or panels. Both support transparency.

Re: Setting the toolbar's background transparented

yyylny13-Dec-04 3:50

yyylny

13-Dec-04 3:50

I think it will be to complicated, no? Isn't there a better way? Maybe there's a free control that I can download that will do it for me?

Thanks lj_rules for you answer - I really appreciate this Smile | :)

changing a DateTime to dd/mm/yyyy

steve_rm10-Dec-04 23:10

steve_rm

10-Dec-04 23:10

Hello,

I am using a datetime variable. But l want to change the format of the shortdatestring from mm/dd/yyyy to the new format of dd/mm/yyyy.

I used the code below using, using System.Globalization. However, it won't change to this new format of dd/mm/yyyy

DateTime today = Convert.ToDateTime(DateTime.Today.ToShortDateString());<br />
DateTimeFormatInfo dateFormat = new DateTimeFormatInfo();<br />
dateFormat.ShortDatePattern = "dd/mm/yyyy";<br />
today.ToString(dateFormat);

Can anyone help with this.

Many thanks in advance,

Steve

Re: changing a DateTime to dd/mm/yyyy

Atal Upadhyay11-Dec-04 0:45

Atal Upadhyay

11-Dec-04 0:45

Here is how is goes:

DateTime today = DateTime.Today;
MessageBox.Show(today.ToString("dd/MM/yyyy"));

Regards.

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