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Does this have anything to do with C#?
It's time for a new signature.
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Does this have anything to do with programming?
Me, I'm dishonest. And a dishonest man you can always trust to be dishonest.
Honestly. It's the honest ones you want to watch out for...
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I created a UserControl that contains three RichTextBox controls. I added a PrintDocument property, and the methods required to print (Print, PrintPage, BeginPrint, etc).
I have a loop that iterates the data and loads three strings in the RichTextBox controls, one to each control, and then calls PrintDocument.Print(). It should then print that page and get the next three strings of data to print.
This works fine for the first page, but the other pages don't print. After calling PrintDocument.Print() the program returns to the main form that called the UserControl print method.
How do I continue iterating through my loop to print more pages?
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Hi,
the general answer is: in the PrintPage handler, you should set PrintPageEventArgs.HasMorePages; however it might be more complex than that when printing list-oriented controls (including RichTextBox) as there may be more data in them than is visible at any one time on your Form.
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Luc Pattyn wrote: you should set PrintPageEventArgs.HasMorePages;
I already thought of that. I also thought of setting the printrange to currentpage and then repeatedly call Print. Even that failed.
pagesLeft = this.Print( e );
if ( pagesLeft < cardsToPrint.Count )
{
e.HasMorePages = true;
}
else
e.HasMorePages = false;
The Print() method calls Graphics.DrawString() and draws the strings on the PrintDocument graphics rect. For a single page it works perfectly.
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This is what I suggest as a test: keep things as simple as possible. Hence use a boolean class member:
bool firstPage=true;
then do:
e.HasMorePages=firstPage;
firstPage=false;
That should print two pages, no matter what. Then take it from there.
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I'll give it a try. Thanks!
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Hello all,
Am developing mapwinGIS appln. I have inserted the vscrollbar control on moveing up and down nothing changes. Am suppose to give code for it. but i dont know how to go about it. Can someone help me out or give an idea of how to go about it??? or any sample code for it pls??
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I'm new to sql and would appreciate some help on the best way to structure the following type of operation. I have a db containing stock symbols. I'm retrieving each symbol, calculating a series of moving averages and updating the symbol table with the calculated values for each row in the symbol table. The way I have things structured below takes "for ever" to run through? Utlimately there will be a 1000 or more symbols in the db. Any help would be appreciated!
try
{
SQLiteConnection conn = new SQLiteConnection(Constants.ConnectionString);
if (conn.State == ConnectionState.Closed)
conn.Open();
string CommandText = "SELECT symbol FROM master;";
SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter(CommandText, conn);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
DataTable symdt = new DataTable();
IMovingAverage ma20 = new SimpleMovingAverage(20);
IMovingAverage ma50 = new SimpleMovingAverage(50);
IMovingAverage ma200 = new SimpleMovingAverage(200);
foreach (DataRow r in dt.Rows)
{
CommandText = "SELECT * FROM " + r["Symbol"].ToString() + ";";
SQLiteDataAdapter symdataAdapter = new SQLiteDataAdapter(CommandText, conn);
symdataAdapter.Fill(symdt);
int count = 0;
foreach (DataRow symr in symdt.Rows)
{
if (symdt.Rows.Count >= 20)
{
ma20.AddSample(Convert.ToSingle(symdt.Rows[count]["Close"]));
symdt.Rows[count]["MA20"] = ma20.Average;
}
if (symdt.Rows.Count >= 50)
{
ma50.AddSample(Convert.ToSingle(symdt.Rows[count]["Close"]));
symdt.Rows[count]["MA50"] = ma50.Average;
}
if (symdt.Rows.Count >= 200)
{
ma200.AddSample(Convert.ToSingle(symdt.Rows[count]["Close"]));
symdt.Rows[count]["MA200"] = ma200.Average;
}
++count;
}
SQLiteCommandBuilder mySqlCommandBuilder = new SQLiteCommandBuilder(symdataAdapter);
symdataAdapter.Update(symdt);
symdt.Clear();
symdataAdapter.Dispose();
ma20.ClearSamples();
ma200.ClearSamples();
ma50.ClearSamples();
}
dt.Clear();
dataAdapter.Dispose();
conn.Close();
conn.Dispose();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
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While this approach could I'm sure be made to work I want to keep the general structure of what I'm doing since I'll be calculating other indicators not supported in SQL.
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boreland wrote: calculating other indicators not supported in SQL
Such as? You stated you are calculating running averages, that indicates numeric data 
I know the language. I've read a book. - _Madmatt
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Could someone please advise if a transactional approach would be more efficient and if some how to do this using a datatable?
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Your calculation of moving averages looks suspect. It looks like you're just adding the value from the nTh row to your "moving average", rather than the average of n rows...
You would likely get better performance and less memory consumption if you used a DataReader instead of a DataAdabtor and DataTables, and did your updates atomically as needed on a different connection using ExecuteNonQuery with an update statement instead of relying on a batch update...
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They both appear to do the same thing to me, what should each one be used for and what one has a less performance hit?
Thanks! 
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Reading the documentation and, if important to you, performing a little experiment should provide the answer. Did you look at the values returned?
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I am developing an add-in for VS for latex. The very first functionality I wish to implement is a button "compile" (to pdf). Well I can do that, but what I want is
1. Do not show a console window
2. Redirect text output (with errors/warnings/mesasges) from pdftex. The next step will be to parse these results and show them in a separate window.
I use the following code:
Document doc = _applicationObject.ActiveDocument;
if (Path.GetExtension(doc.Name) == ".tex")
{
var p = new System.Diagnostics.Process();
var pinfo =new ProcessStartInfo
{
CreateNoWindow = true,
FileName = "pdflatex",
Arguments = string.Format("\"{0}\" -c-style-errors", doc.FullName),
WorkingDirectory = Path.GetDirectoryName(doc.FullName),
};
p.EnableRaisingEvents = true;
p.Exited += p_Exited;
p.StartInfo = pinfo;
p.Start();
}
I have observed the following issues:
1. Uncommenting RedirectStandardError = true causes that pdftex does not work (no output file is generated at all)
If RedirectStandardError = true is commented, then pdftex does it's job. But:
2. Despite CreateNoWindow = true console still shows up.
3. p_Exited is never called
As you see none of things I wanted to do actually works. It is quite depressing. Any ideas?
Thanks--
Greetings - Jacek
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Hi,
The exact behavior of a program is determined by the program itself; the StartInfo parameters only influence the way Windows simulates a user launching a process. If pdftex decides to open a console, there is nothing to stop it.
Didn't you forget to:
- set UseShellExecute false?
- also redirect standard output?
- addevent handlers or threads to actually read the output/error stream?
FYI: I just finished this article [^] on a related subject.
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Luc Pattyn wrote: If pdftex decides to open a console, there is nothing to stop it
There are programs for LateX (like LyX), which use pdftex and no console is opened -- they show pdftex' output in some "output" window. So, it is possible to redirect the output.
Luc Pattyn wrote: Didn't you forget to: (etc.)
No, i did not forget.
void p_ErrorDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("err:" + e.Data);
}
void p_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("out:" + e.Data);
}
void p_Exited(object sender, EventArgs e)
{...
I put breakpoints inside all these handlers, but they were never reached (breakpoints in other places work, so it is not a debugger problem).
I am close to giving up all this mess. 
Greetings - Jacek
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Jacek Gajek wrote: No, i did not forget.
That does not fit well with the code you have shown.
I'm afraid I can't provide any more help, unless you show actual code.
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Luc Pattyn wrote: That does not fit well with the code you have shown.
I meant I hadn't forgotten to add apriopriate lines after reading your post, of course  . Here is the full code.
public void Exec(string commandName, vsCommandExecOption executeOption, ref object varIn, ref object varOut, ref bool handled)
{
handled = false;
if(executeOption == vsCommandExecOption.vsCommandExecOptionDoDefault)
{
if(commandName == "LatexAddin.Connect.LatexAddin")
{
Document doc = _applicationObject.ActiveDocument;
if (Path.GetExtension(doc.Name) == ".tex")
{
var p = new System.Diagnostics.Process();
var pinfo =new ProcessStartInfo
{
WindowStyle=ProcessWindowStyle.Hidden,
CreateNoWindow = true,
FileName = "pdflatex",
Arguments = string.Format("\"{0}\" -c-style-errors", doc.FullName),
WorkingDirectory = Path.GetDirectoryName(doc.FullName),
RedirectStandardError = true,
RedirectStandardOutput = true,
UseShellExecute = false
};
p.StartInfo = pinfo;
p.OutputDataReceived += p_OutputDataReceived;
p.ErrorDataReceived += p_ErrorDataReceived;
p.EnableRaisingEvents = true;
p.Exited += p_Exited;
p.Start();
}
return;
}
}
}
void p_ErrorDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("out:" + e.Data);
}
void p_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("out:" + e.Data);
}
void p_Exited(object sender, EventArgs e)
{
Console.Beep();
((Process) sender).Exited -= p_Exited;
((Process)sender).OutputDataReceived -= p_OutputDataReceived;
((Process)sender).ErrorDataReceived -= p_ErrorDataReceived;
}
Greetings - Jacek
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For something like that that I'm playing with this week, I use:
this.process.StartInfo.CreateNoWindow = false ;
this.process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden ; <-- may be unnecessary
this.process.StartInfo.UseShellExecute = false ;
this.process.StartInfo.RedirectStandardInput =
this.process.StartInfo.RedirectStandardOutput =
this.process.StartInfo.RedirectStandardError = true ;
this.process.Start() ;
And I don't use the events. 
One of the problems[^] into which I ran is that reading from the error stream seems to block.
I now have a work-around for that, which I may submit in an article today.
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Thanks.
PIEBALDconsult wrote: this.process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden ; <-- may be unnecessary
This one did the trick.
Greetings - Jacek
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Hurray it worked! thank you so much
Solution:
process.Start();
process.ErrorDataReceived+=new DataReceivedEventHandler(process_ErrorDataReceived);
process.OutputDataReceived+=new DataReceivedEventHandler(process_OutputDataReceived);
process.BeginOutputReadLine();
process.BeginErrorReadLine();
Greetings - Jacek
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