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Actually, you can create an instance of a type without ever calling its constructor.
For value types that is trivial, but even instances of reference types can be created without ever calling their constructor. With, for example, GetUninitializedObject[^].
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+5 Fascinating revelation, that ! I'm trying to imagine a scenario where using that method would be required or optimal.
best, Bill
"Anyone who shows me my 'blind spots' gives me the gift of sight." ... a thought from the shallows of the deeply shallow mind of ... Bill
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The documentation gives a big clue: if you are doing deserialisation, you need to have an instance to deserialise data into, but you don't want to go through the construction phase because you want to directly set the state of the object and so any effort the constructor goes to is wasted effort.
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12.No advertising or soliciting
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Hi all! I am outputting text on controls for printing. I changed the font to "Times New Roman", a size of 12.0f. After printing I noticed there were jaggies in the texts. A look at the text on the controls also reveal some jaggies. After reading about the problem, I learnt it can be solved through Anti-Aliasing and Interpolation.
Well, I really do not have any idea about Anti-Aliasing and Interpolation and how to solve these jaggies problems. How do I set the smoothing mode for the control? Since it requires a Graphics object, do I have to create a Graphics object from the control and set the smoothing mode before setting the text, or how?
A little tutorials and guidance will really help me a lot. Thanks in advance.
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Hi, The scenario you describe here is one where you are using DrawString in a Paint EventHandler to overlay text on top of Controls; and then, printing ?
Do you see the same type of jaggies if you switch to another serif font ? If you go up to, say, 18 points in font size, still see the jaggies ?
Have you experimented with TextRenderingHint settings in the Paint event like: see MSDN:[^]
e.TextRenderingHint = Drawing.Text.TextRenderingHint.AntiAliasGridFit; Or, if using a ClearType font:
TextRenderingHint.ClearTypeGridFit;
"Anyone who shows me my 'blind spots' gives me the gift of sight." ... a thought from the shallows of the deeply shallow mind of ... Bill
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Hello everyone,
i want to use curve line interpolation in order to draw smooth curve line through a collection of points, i tried to use MSchart but it only use Spline algorithm and sometimes it's not smooth. is there other solution, or is it possible to draw curve lines using other algorithm on MSchart that MSchart doesn't provide, so i can get benefit of the Component properties.
thanks a lot
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You can do custom painting on a chart in its PostPaint event. Alternatively, you can calculate the data for the interpolated line and add it as a series.
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Hi, any ideas on how to solve this problem?
double.IsNaN((NC / (Math.Pow(NX, 0.5) * Math.Pow(NY, 0.5))))
returns true when the visual studio debugger is showing valid values of the doubles NC, NX, and NY (e.g. 1, 2, and 2 respectively)?
Thanks, stegzzz
Using C#, VS2010 Professional, .Net Framework 3.5
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I've just run it and it's outputting false. How have you declared NC, NX and NY - I tested it with double and int and it returned false in both cases.
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Hi, NC, NX, and NY are locals with values arrived at by calling functions C and L
double NC = C(X,Y);
double NX = L(X);
double NY = L(Y);
double.IsNaN((NC / (Math.Pow(NX, 0.5) * Math.Pow(NY, 0.5))))
now returns true, for example when NC=1, NX=NY=2, as shown in the debugger. I should stress that these are not the only values of NC,NX, and NY which produce this strange result, it happens on a range of different (and apparently valid values) and not consistent - I only get the problem on some evaluations so I guess there is something outside the code presented here but I really have no idea where to start to look!
stegzz
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Change it to:
double NC=1;
double NX = 2;
double NY = 2; When I ran this, the NAN check returns false.
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Yes, this works as you say, so I suppose this points to the conclusion that the values shown in the debugger are not the ones which are being used when IsNaN returns true.
How can I work out what values are actually being evaluated and why doesn't the debugger show them?
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Use System.Diagnostics.Debug.WriteLine and write the values to the output window.
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Math.Pow(a, b) gives NaN if (but not only if) a is less than zero but not NegativeInfinity and b is not an integer and not infinite.
Which means, in this case, that if one or both of NX or NY are less than zero but not NegativeInfinity, you get a NaN.
NC can make it NaN if NC=NX=NY=0.
And of course the entire thing will be NaN if any of the inputs are NaN.
The values shown by the debugger must somehow be wrong.
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The debugger stops on the return, right after checking IsNaN(S)
double S =(NC / (Math.Pow(NX, (double)0.5) * Math.Pow(NY, (double)0.5)));
if (double.IsNaN(S))
return 0;
And the debugger values for NC, NX, and NY are 1,2, and 2, respectively, so as suggested there is something wrong with the values being shown in the debugger.
Any ideas how to find out what the real values are that go into the calculation of S?
The code works fine when tested alone, in isolation from the rest of the program.
Thanks, stegzzz
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Are there other variables named NC or NY that you or the debugger might confuse for each other? That is often what goes wrong.
Or is there any threading going on that might change NX or NY?
I'd put a break on the line that does the calculation, and hover over the various parts of the expression there (instead of looking in the locals window).
Btw, I get the expected result of S = 0.5
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Is there any sample code or article based on Asp.net nested Accordion menu which drives values from sql server.
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Probably lots, did you try looking at the articles pages[^] here on CodeProject, or typing your question into Google?
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
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Yes.
".45 ACP - because shooting twice is just silly" - JSOP, 2010
-----
You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass." - Dale Earnhardt, 1997
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i already done web page but i have a problem..now i have 2 web page window which is button window and graph window....so, i want to make button and graph in a window..the graph always refresh...how can i do that?
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Your question is not very clear, and would probably be better in the ASP.NET or Web Development forums.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
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when I start run remoting It show problem:
No connection could be made because the target machine actively refused it 127.0.0.1:8080
how can Fix this Problem...Thank in advanced
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