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I am trying to separate my printing model into 3 classes. Each class knows how to print its own contents and I am passing a PrintDocument references to these 3 classes. It works fine if am going to print one page only but how can i define that i have more pages to print. I know I got to use e.HasMorePages but where can i define in my context of this model
public class Print
{
PrintDocument pd = new PrintDocument
DocumentHeader header = new DocumentHeader(pd, "header");
PrintContents pc = new PrintContents(pd, "Body, numberOfPages);
DocumentFooter footer= new DocumentFooter(pd,"Footer);
}
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Hi
Please accept my apologies if this sound silly but I cannot find a solution to this.
I have a project I am converting to C# from VB. In VB I would do this.
Select Case Asc(UCase(Mid(strName, intPos, 1)))
Case 48 To 57
Let strNameSearch = strNameSearch & UCase(Mid(strName, intPos, 1))
Case 65 To 90, 193, 201, 205, 211, 218, 225, 233, 237, 243, 250
'some other code here
End Select
I have looked on the interweb and the only solution I have found is to use the switch statement like this
switch (statement that returns the ASCII value of the text)
{
case 48:
case 49:
case 50:
}
This does seem a bit convoluted so is there an easy way like with the To statement in vb? (a link to some advanced switching will be greatly received) How do I get the ASC value of a character. Alot of people are saying to do Convert.ToInt32(....) but this brings me back errors as I am using a for loop to iterate through a substring.
Your help is greatly appreciated.
The FoZ
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Yes, there is no C# equivalent of VB's
Case 48 To 57 Best you can do inside a switch statement is
case 48:
case 49:
case 50:
etc.
But that sounds really ugly. (In fact, the VB solution sounds like an ugly hackery.)
A better option may be to utilize a table (such as a Dictionary<int, string>) to map integer keys to string values or functions that produce string values. Tell us what you want to do, and we'll tell you a good way to do it.
TheFoZ wrote: Alot of people are saying to do Convert.ToInt32(....) but this brings me back errors as I am using a for loop to iterate through a substring.
char someChar = 'A';
int charValue = (int)someChar;
Life, family, faith: Give me a visit.
From my latest post: "A lot of Christians struggle, perhaps at a subconscious level, about the phrase "God of Israel". After all, Israel's God is the God of Judaism, is He not? And the God of Christianity is not the God of Judaism, right?"
Judah Himango
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Thanks for the response. Do you have an example at all. What the function basically does is convert a string to an Upper Case string without any punctuation.
e.g
"This is a c# program!"
converts to
"THISISACPROGRAM"
Many thanks
The FoZ
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Way easier way to do that using the latest version of C#:
string input = "This is a c# program!";
var newChars = from character in input
where !char.IsPunctuation(character) && !char.IsWhiteSpace(character)
select char.ToUpper(character);
string result = new string(newChars.ToArray());
Life, family, faith: Give me a visit.
From my latest post: "A lot of Christians struggle, perhaps at a subconscious level, about the phrase "God of Israel". After all, Israel's God is the God of Judaism, is He not? And the God of Christianity is not the God of Judaism, right?"
Judah Himango
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Thanks for that.
As you said, the code is for the latest version of C# and I am using 2005. I came up with this that seems to do the job
public static string CVNameSearch(string inputStr)
{
int x;
string returnStr;
returnStr = "";
for (x = 0; x<= inputStr.Length -1; ++x)
{
if (char.IsLetter(inputStr, x))
{
returnStr += inputStr.Substring(x, 1).ToUpper();
}
}
return returnStr;
}
Thanks for your help today
The FoZ
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Why not something simple, like this?
str = Regex.Replace(str, "[^A-Za-z]+", string.Empty).ToUpper();
Despite everything, the person most likely to be fooling you next is yourself.
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Nice cheers.
Don't suppose you could explain the syntax for me. I gather from the help that str is the input string, "[^A-Za-z]+" is the match but I'm not sure how it works. What is the string.Empty for?
Thanks for your help
The FoZ
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[^A-Za-z]+<br /> Basically this is a regular expression pattern which matches:
[^]+ ==> any character that is not included inside the brackets
A-Z ==> matches any character in the range A to Z
a-z ==> matches any character in the range a to z
So basically it replaces an non-alphabetic character with string.Empty. string.Empty (or String.Empty or System.String.Empty) are essentially the same as "" however when you reference them it does not create a new object but utilises one that's already been created, thus more memory efficient. A small difference but sometimes it matters.
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Ed.Poore wrote: string.Empty (or String.Empty or System.String.Empty) are essentially the same as "" however when you reference them it does not create a new object but utilises one that's already been created, thus more memory efficient. A small difference but sometimes it matters.
The performance difference is really minimal, but there is another difference.
If you always use string.Empty when you want an empty string, the code gets clearer. If you happen to stumble upon a "" in the code, you know that there is supposed to be something between the quotation marks, that perhaps got erased or left out by mistake.
Despite everything, the person most likely to be fooling you next is yourself.
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That's the best justification I've heard of it, thanks! I do use it but had always been slightly confused as to what the point was, now there's a valid reason.
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Another benefit is that it ensures the comparisons are always performed the same way...no more some tests looking for length == 0 while others looking for "".
Scott Dorman Microsoft® MVP - Visual C# | MCPD
President - Tampa Bay IASA
Hey, hey, hey. Don't be mean. We don't have to be mean because, remember, no matter where you go, there you are. - Buckaroo Banzai
[ Forum Guidelines][ Articles][ Blog]
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Excellent reasons. Another benefit is that it ensures the comparisons are always performed the same way...no more some tests looking for length == 0 while others looking for "".
Scott Dorman Microsoft® MVP - Visual C# | MCPD
President - Tampa Bay IASA
Hey, hey, hey. Don't be mean. We don't have to be mean because, remember, no matter where you go, there you are. - Buckaroo Banzai
[ Forum Guidelines][ Articles][ Blog]
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Ed.Poore wrote: does not create a new object but utilises one that's already been created
But in either case it stores an empty string in the executable at that point, because it's a constant, right?
If so, there's no difference.
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No it doesn't, I just compiled a sample and took a look at it under reflector and they definitely use two different methods, one compares a constant, the other compares the reference:
.entrypoint
.maxstack 2
.locals init (
[0] string toCompare,
[1] bool c1,
[2] bool c2)
L_0000: nop
L_0001: ldstr "Hello"
L_0006: stloc.0
L_0007: ldloc.0
<span style="color: Red;">L_0008: ldsfld string [mscorlib]System.String::Empty</span><br style="color: Red;"><span style="color: Red;">L_000d: call bool [mscorlib]System.String::op_Equality(string, string)</span>
L_0012: stloc.1
L_0013: ldloc.0
<span style="color: Green;">L_0014: ldstr ""</span><br style="color: Green;"><span style="color: Green;">L_0019: call bool [mscorlib]System.String::op_Equality(string, string)</span>
L_001e: stloc.2
L_001f: ret</br></br>
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PIEBALDconsult wrote: But in either case it stores an empty string in the executable at that point, because it's a constant, right?
If so, there's no difference.
No, the string.Empty property returns a string that already exists in the mscorlib.dll. If you use "", that literal string will be added to your assembly.
The difference is minimal, as it's only a few bytes of data, but there is a difference.
Despite everything, the person most likely to be fooling you next is yourself.
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Thanks for the info. 'Every little helps' when it all comes down to it. The Regex expression does exactly what the old VB code does in about 10 lines and lots of iterations through a loop.
The FoZ
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It all depends on whether you understand (and like) regular expressions. Some people will do anything to avoid them.
I doubt it. If it isn't intuitive then we need to fix it. - Chris Maunder
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The pattern "[^A-Za-z]+" matches any non-letter characters, which then are replaced by an empty string, so that any non-letter characters are removed from the string. The ^ in the set makes it a negative set, mathing any characters except A-Z and a-z.
If you want to keep any other characters, you just add them in the pattern, like for example "[^A-Za-zÅåÄäÖöÉéÈèËëÑñ]+".
Despite everything, the person most likely to be fooling you next is yourself.
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In C# you would use a bunch of if(c == foo) .... else if(30 < c && c < 100 && c == 10) ... etc.
Of course with your particular issue doing it character by character probably isnt the best solution. I'd avoid using a Regex for something so simple. The framework has a bunch of stuff here thats probably useful (and culture invariant), eg: "foo bar".ToUpper().Replace(" ","") or similar.
And who suggested LINQ? Just because LINQ is cool doesnt mean its appropriate to use it 
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So I've been trying to create a screen saver where the contents of a file will be read and displayed on the screen - but not having much success.
I want the text to appear one character at a time (like a typewriter) but the problem is the flicker! I've tried labels, multi-line textboxes and richtextboxes and they all have ridiculous amounts of flicker. Labels are better if I don't set the FlatStyle to System but then I can't see the tabs, so I don't want that.
Another issue is I'm not able to scroll along with the text as it progresses down the control. I tried the ScrollToCaret trick and that works but first it has to jump to the start of the control which causes another undesirable effect.
Here's the method that does the typewriter thing:
public void TW()
{
try
{
char[] myChars = msg.ToCharArray();
lbl.Text = "";
for(int i = 0; i < myChars.Length; i++)
{
lbl.Text += myChars[i].ToString();
System.Threading.Thread.Sleep(0);
}
}
catch(Exception)
{
}
}
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Have you tried GDI+ and/or direct draw
-Spacix
All your skynet questions[ ^] belong to solved
I dislike the black-and-white voting system on questions/answers. 
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No I haven't. I think once I made a triangle in some tutorial somewhere, but that's it. Would this work for text pulled from a file?
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yep, you can read the text into a string and load string builder then draw is one char at a time, or any other goodies you wish to manipulate it with.
-Spacix
All your skynet questions[ ^] belong to solved
I dislike the black-and-white voting system on questions/answers.
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Well the GDI+ suggestion works great!! No flicker and it looks very nice. Now I'm wondering how I clear the screen and "tele-type" some more text.
The graphics object I'm using comes from the main form's CreateGraphics method. I have no idea if this is ideal or not (probably not) but I'm not sure how I could clear the form once the bottom of the screen is reached and continue from the top with the remainder of the text.
Part of the problem might be that the method used to write my text is in another thread.
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