C# Discussion Boards - CodeProject

Luc Pattyn22-Feb-07 8:14

Luc Pattyn

22-Feb-07 8:14

Hi,

answering one question:

everytime you do a "new Something()" of a class Something that has a Dispose() method,
you are supposed to call Dispose() as soon as you are done with that object; if you dont,
you are likely to get memory leaks (which a gc cannot solve for you).

Smile | :)

Luc Pattyn

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Saira Tanwir22-Feb-07 8:23

Saira Tanwir

22-Feb-07 8:23

thanks or reply and ur times.

my application started working all of a sudden however i'll have to check for its such unstable behaviour.

Thanks once again

Regards Rose | [Rose]

Saira

malharone22-Feb-07 8:15

malharone

22-Feb-07 8:15

That is if you have created your custom .. e.g if you're creating new Brush objects for paiting custom icons/images on your menu, but left out the dispose part by accident, this is possible.

you could do:

Brush b = null;<br />
try<br />
{<br />
  b = new ...<br />
}<br />
finally<br />
{<br />
  b.Dispose();<br />
}

using (Brush b = new ...)<br />
{<br />
}

The using expression takes any object that implements IDisposable. I prefer the "using" for cleanliness, and never having to forget the 'dispose' portion in finally.

- Malhar

Asymmetric Encryption of File

Saira Tanwir22-Feb-07 8:20

Saira Tanwir

22-Feb-07 8:20

i'm not using any Brush or such graphic objects.

my application started working correctly all of a sudden (by itself) without my doing anything to it.

i must research on its peculiar an odd behaviour

Any ways thanks for ur time and plz do lookup the second query i've just posted.

Regards Rose | [Rose]

Saira

Vasudevan Deepak Kumar22-Feb-07 7:07

Vasudevan Deepak Kumar

22-Feb-07 7:07

I am trying to apply an Asymmetric Encryption (RSA) for file. Since the cryptographic provider needs byte inputs, the server gets overwhelmed typically in case of huge files in the magnitude of 50 MB.

Any pointers towards split and encryption?

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

WebBrowser Control

zaboboa22-Feb-07 6:22

zaboboa

22-Feb-07 6:22

Hello,

I am using a WebBrowser control, that is there to display the HTML file. It has some links. The problem is, I don't want those links to change the colour when user clicks on them. I supress the link from poping up, but the colour on the hyperlink changes.
Is there a way of keeping the same blue colour?

Thank you.

Ravi Bhavnani22-Feb-07 6:32

22-Feb-07 6:32

Here's a style fragment that will cause the hyperlink to always render in blue:

A:link { color: #0000FF; text-decoration: none; }
A:visited { color: #0000FF; text-decoration: none; }
A:hover { color: #0000FF; text-decoration: underline }
A:active { color: #0000FF; text-decoration: none }

/ravi

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zaboboa22-Feb-07 7:16

zaboboa

22-Feb-07 7:16

Yeah, but this has to be done in the document itself. I guess there is no property on the control itself to control the hyperlink colours.
Thanks.

Ravi Bhavnani22-Feb-07 7:27

22-Feb-07 7:27

If you're programatically navigating the control to a URI, you could modify the HTML (i.e. inject an ~~inline~~ internal style) before setting the web browser control's content.

/ravi

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zaboboa22-Feb-07 7:32

zaboboa

22-Feb-07 7:32

Don't I need a style sheet for that? Or I can do it the same way I am setting the background colour for the webbrowser control. How would the HTML contents look like?
Thank you.

Ravi Bhavnani22-Feb-07 7:38

DataTableReader is invalid for current DataTable

22-Feb-07 7:38

Sorry, I meant an internal[^] style, not an inline style.

/ravi

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bemahesh22-Feb-07 5:50

bemahesh

22-Feb-07 5:50

hi, I am trying to get the data from datatable in to DataTableReader so i can read the data like datareader.

I am getting error "DataTableReader is invalid for current DataTable" when trying to call the GetValues method on DataTableReader.

Please shed some light. If it helps here is my code in C# 2.0

public void Execute()
{

using (DataTableReader dataTableReader = new DataTableReader(myDataTable))
{
object[] values = new object[dataTableReader.FieldCount];

int fieldCount = dataTableReader.GetValues(values);
string id= values[4].ToString();
string Type = values[0].ToString();

}

}

i am poppulating a datatable from SQL 2000 database and is getting 4 rows back ( i can see that in datatable viewer in debug mode). I am also able to get the field count on datatableReader which is 6 (=number of columns).

However, when i get to the point where i need to get the values from the dataTableReader using
dataTableReader.GetValues(values), that's where it breaks up and states "DataTableReader is invalid for current DataTable"

Please shed some light

Thanks
Needy

Big html string. How to store them? [modified]

Scripter4722-Feb-07 5:28

Scripter47

22-Feb-07 5:28

Hey!

I'm new in c#, and i'm trying to make a template browser, that stores html strings in variables.

My problem is, how do i store the html to a string?

The html looks something like this:

<br />
<HTML><br />
<HEAD><br />
<title>test</title><br />
</HEAD><br />
<BODY><br />
<a href="http://www.codeproject.com/">link</a><br />
</BODY><br />
</HTML><br />

I have tryed this "string html = @"<The html>";" but doesn't work Frown | :(

Any suggestions?

-- modified at 11:42 Thursday 22nd February, 2007

Ravi Bhavnani22-Feb-07 6:32

22-Feb-07 6:32

Scripter47 wrote:
but doesn't work

Can you explain what you mean by "doesn't work"?

/ravi

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Scripter4722-Feb-07 7:22

Scripter47

22-Feb-07 7:22

When i have a code like this:

string html = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
<html xmlns=\"http://www.w3.org/1999/xhtml\">
<head>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\" />
<title>Untitled Document</title>
</head>

<body>
</body>
</html>";

Then it wouldn't compile Frown | :(

How do I do it?

Stefan Troschuetz22-Feb-07 7:31

Stefan Troschuetz

22-Feb-07 7:31

You cannot stretch a string literal across multiple lines like that. It should be:

string html = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" " + "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html " + "xmlns=\"http://www.w3.org/1999/xhtml\"><head><meta http-equiv=\"Content-Type\" " + "content=\"text/html; charset=iso-8859-1\" /></head><body></body></html>";

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cookwww.troschuetz.de

Ravi Bhavnani22-Feb-07 7:32

22-Feb-07 7:32

Scripter47 wrote:
it wouldn't compile

Right - that's incorrect syntax. A string literal can't include an unescaped new line character. One way to do it is to use the string concatentation operator.

string html = "<!DOCTYPE html PUBLIC ...";
html += "...";

/ravi

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Luc Pattyn22-Feb-07 7:33

Luc Pattyn

22-Feb-07 7:33

Hi,

a valid string constant has matching double quotes on one (or every) line;
if multi-line, it needs + operators for concatenation (then strictly speaking it
is a string expression containing multiple string constants);
if new-lines are wanted, you must include them explicitly.

Example:

string str="part1\n"+
           "part2\n"+
           "part3.";

There is no backslash-at-end-of-line or auto-concatenate trick (as in C)

The compiler will concatenate for you, so the multi-line source code does not
result in additional run-time code.

Smile | :)

Luc Pattyn

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