C# Discussion Boards - CodeProject

Mark Churchill16-Aug-07 21:16

Mark Churchill

16-Aug-07 21:16

Give this a try. I've noticed that some properties don't seem to update until they are rendered (bad form IMO).

// Fails to show the selected node<br />
cardsTreeView.SelectedNode = cardsTreeView.Nodes[dropNode.Index];        <br />
cardsTreeView.Nodes[dropNode.Index].EnsureVisible();

Mark Churchill
Director
Dunn & Churchill

Mark F.19-Aug-07 7:28

Mark F.

19-Aug-07 7:28

Sorry, but I don't understand your reply. You posted the code that I already have in my project.

Mark

Mark Churchill19-Aug-07 15:03

Mark Churchill

19-Aug-07 15:03

Ah not quite. Where you set the tree.SelectedNode to someNode, and then called EnsureVisible on tree.SelectedNode , I set the tree.SelectedNode and then called EnsureVisible on someNode.

It might not seem like theres actually a difference, but I have noticed sometimes you can set properties on some of the web controls and they don't come back out correctly until they are rendered. Ie the following code fails:

someTree.selectedNode = someNode;
assert(someTree.selectedNode == someNode);

Odd, I know, but theres no harm trying it.

Mark Churchill
Director
Dunn & Churchill

Mark F.20-Aug-07 3:45

Mark F.

20-Aug-07 3:45

Well I tried your suggestion and the TreeView still does not scroll to the selected node and show it as selected. Must be a bug in the TreeView control.

Thanks for the assistance.

Mark

C # Constructor question

radshaykho16-Aug-07 13:15

radshaykho

16-Aug-07 13:15

Hi,

Would anyone explain the meaning of the yellow highlighted code?
I am specifically not sure on what it means as a declaration.

// Constructor that defaults to case-insensitive switches and
// defaults to "/" and "-" as the only valid switch characters
protected ArgumentParser(String[] switchSymbols) : this(switchSymbols, false, new string[] { "/", "-" })
{
}

// Constructor that defaults to "/" and "-" as the only valid switch characters
protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches)
: this(switchSymbols, caseSensitiveSwitches, new string[] { "/", "-" })

And how would you rewrite it in a simplified way (Easy to read and understand)

Thank you.
Rad

public abstract class ArgumentParser
{
private String[] switchChars; // For example: "/", "-"

private String[] switchSymbols; // Switch character(s)

private Boolean caseSensitiveSwitches; // Are switches case-sensitive?

// Domain of results when processing a command-line argument switch
protected enum SwitchStatus { NoError, Error, ShowUsage };

// Constructor that defaults to case-insensitive switches and
// defaults to "/" and "-" as the only valid switch characters
protected ArgumentParser(String[] switchSymbols) : this(switchSymbols, false, new string[] { "/", "-" })
{
}

// Constructor that defaults to "/" and "-" as the only valid switch characters
protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches)
: this(switchSymbols, caseSensitiveSwitches, new string[] { "/", "-" })
{
}

// Constructor with no defaults
protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches, String[] switchChars)
{
this.switchSymbols = switchSymbols;
this.caseSensitiveSwitches = caseSensitiveSwitches;
this.switchChars = switchChars;
}

Thanks,
Rad

Colin Angus Mackay16-Aug-07 13:47

Colin Angus Mackay

16-Aug-07 13:47

radshaykho wrote:
Would anyone explain the meaning of the yellow highlighted code?

What yellow highlighted code?

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Paul Conrad16-Aug-07 15:39

Paul Conrad

16-Aug-07 15:39

Colin Angus Mackay wrote:
What yellow highlighted code?

Got me on that...

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Luc Pattyn16-Aug-07 13:50

16-Aug-07 13:50

Hi,

I don't understand your post.
You mentioned some yellow, the only yellow is the NEW sign on the subject line.

It's my guess the class intends to parse command lines, things that take
filenames (or some other objects) plus optional "switches" which start with
a special symbol such as - or / (as is often the case on UNIX/LINUX and Windows).
And then what follows that symbol may or may not be case-insensitive.

Now what is the problem ?

BTW: there are PRE tags to show code with background color and indentation.

Smile | :)

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byte[] file to PDF and then send in an email as atachment

Scott Dorman16-Aug-07 13:52

Scott Dorman

16-Aug-07 13:52

First, you should wrap your code sections in <pre> tags to make them easier to read. Second there was no section highlighted in yellow so everything that follows is based on guessing what you were asking.

public abstract class ArgumentParser
{
   private String[] switchChars; // For example: "/", "-"
 
   private String[] switchSymbols; // Switch character(s)
 
   private Boolean caseSensitiveSwitches; // Are switches case-sensitive?
 
   // Domain of results when processing a command-line argument switch
   protected enum SwitchStatus { NoError, Error, ShowUsage };
 
   // Constructor that defaults to case-insensitive switches and 
   // defaults to "/" and "-" as the only valid switch characters
   protected ArgumentParser(String[] switchSymbols) : this(switchSymbols, false, new string[] { "/", "-" })
   {
   }
 
   // Constructor that defaults to "/" and "-" as the only valid switch characters
   protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches) 
      : this(switchSymbols, caseSensitiveSwitches, new string[] { "/", "-" })
   {
   }
 
   // Constructor with no defaults
   protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches, String[] switchChars)
   {
   this.switchSymbols = switchSymbols;
   this.caseSensitiveSwitches = caseSensitiveSwitches;
   this.switchChars = switchChars;
   }
}

Based on the code presented here, the third constructor (protected ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches, String[] switchChars)) is the one that actually does the work. The other two constructors are overloading the object constructor and providing two additional "short-hand" ways of declaring an instance of the ArgumentParser class that require fewer parameters. The this calls after the function declaration tell the runtime to call that version of the constructor before running any code in the requested constructor. (In this case, there isn't any additional code being run.)

The sequence that happens would be this:

You call the ArgumentParser(String[] switchSymbols) constructor, which
calls the ArgumentParser(String[] switchSymbols, Boolean caseSensitiveSwitches) constructor, passing in switchSymbols (from your call), false, and the string array { "/", "-" } as the parameters.
This constructor runs and returns control back to the constructor you called, which
runs any code contained in it's body (in this case, there isn't any.)

There really isn't a way to make this any simpler other than to remove the overloads and force everyone to call the full constructor; but that isn't really simplifying it.

-----------------------------
In just two days, tomorrow will be yesterday.

http://geekswithblogs.net/sdorman

mvadibb16-Aug-07 12:12

mvadibb

16-Aug-07 12:12

I have a pdf file as byte[] coming from ReportingService, it is ok If I want to save it in client PC "Response.BinaryWrite(myReport)";
, but how can I send it as an atachment in email message?
.
.
.
byte[] myReport;
myReport= rs.Render(path,fileFormat, null, @"<DeviceInfo><Toolbar>False</Toolbar></DeviceInfo>", parameter, null, null,
out encoding, out mimeType, out parametersUsed,
out warnings, out streamIds);

Response.Clear();
Response.ContentType = mimeType;
Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
//this one works ok:
Response.BinaryWrite(myReport);

//but I want to add attachment:
MailMessage em = new MailMessage();
em.Attachments.Add(myReport);//this doesn't work, I need to somehow change the "myReport" byte[] to pdf file
em.From = "myemail@email.com";
em.To = "myemail@email.com";
SmtpMail.SmtpServer = "emailserver";
SmtpMail.Send(em);

vafa

Re: byte[] file to PDF and then send in an email as atachment

Guffa16-Aug-07 14:48

Guffa

16-Aug-07 14:48

Create a MemoryStream from the byte data, then create an Attachment object by reading from the MemoryStream.

---
single minded; short sighted; long gone;

Re: byte[] file to PDF and then send in an email as atachment

User 167325216-Aug-07 14:49

User 1673252

16-Aug-07 14:49

No, you need to covert it back to MemoryStream.

MemoryStream ms = new MemoryStream(myReport);
em.Attachments.Add(new Attachment(ms, [your mime type]));

modified 17-Jul-19 21:02pm.

Re: byte[] file to PDF and then send in an email as atachment

mvadibb17-Aug-07 5:37

mvadibb

17-Aug-07 5:37

ok, thanks for the postings, I could not get it done since I am not using .NET 2

in older version it just accepts the file path, but new one gets the MemoryStream too.

c# - handling events for forms

jon-8016-Aug-07 11:16

jon-80

16-Aug-07 11:16

I would like to create a handler for form.GotFocus(). In VB I would use a procedure created by the IDE:

vb:

Private Sub Form1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.GotFocus
        DOIT()
    End Sub

How is this reflected in c#?

private void Form1_GotFocus(object sender, EventArgs e)
      {


      }

Jon

Luc Pattyn16-Aug-07 11:18

16-Aug-07 11:18

that seems correct. just add "DOIT();" to the methods body.
What is the problem?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

jon-8016-Aug-07 11:34

jon-80

16-Aug-07 11:34

the problem was finding the command that tells .NET which function handles which event; I had second thoughts and used the EventHandler.

Jon

Luc Pattyn16-Aug-07 11:50

16-Aug-07 11:50

OK, I see; as Christian already replied, you add a delegate to the Focus event:

this.Focus+=new EventHandler(Form1_GotFocus);

the nice thing about Visual Studio C# is as soon as you enter the +=
it suggests the remainder of the line; tab twice to accept and automatically
get the handler's skeleton.

Alternatively you can do the same thru Visual Designer (if so, the this.Focus+=
line will appear file in Form1.Designer.cs)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: creating a webcam driver

Christian Graus16-Aug-07 11:41

Christian Graus

16-Aug-07 11:41

You can do it in the designer, or you can put some code somewhere that says this.Focus += new EventHandler(this.Form1_GotFocus); Something like that.

Yes, I like how VB does it.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

creating a webcam driver

moroman16-Aug-07 10:59

moroman

16-Aug-07 10:59

Hi
I want to create an application that reads the videostream from a webcam, alter the videostream by applying filters, and send the altered stream to an application (like MSN, Skype and other apps that can use cams). To get this to work I guess I have to create an app that reads data from my default webcam, alter the videostream and sends this to a webcam driver that I have created.

In order to let MSN view the altered videostream by default, I need windows to think it has an extra webcam. In MSN it is possible to choose from several cams, and if I can et my "fake" driver to appear in that list, I can send my altered videostream to that driver.

Is this the way to do it? And how can I make this driver? Do I need anything else than WDK?
I'll appreciate all help.

-Martin

Luc Pattyn16-Aug-07 11:22