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I'm currently converting some Java code to C# and
if have problems converting this:
Java:
public class MySuperClass {
String generateShowMe() {
return "ShowMe from MySuperClass";
}
public void ShowMe() {
System.out.println(generateShowMe());
}
}
public class MyChildClass extends MySuperClass {
String generateShowMe() {
return "ShowMe from MyChildClass";
}
public void ShowMe() {
super.ShowMe();
}
}
When i call MySuperClass.ShowMe() i get of course
"ShowMe from MySuperClass", but when i call
MyChildClass.ShowMe(), i get "ShowMe from MyChildClass".
-> although the child class calls the base (super) class to show the string, the super class calls generateShowMe() from the child class.
How can i to this in C#?
(i currently simulate this, by using a delegate to call generateShowMe())
thanks,
Carsten
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I think you mean
base.ShowMe();
"When the only tool you have is a hammer, a sore thumb you will have."
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obsolete - don't won't to blame my self 
see Richard Deeming post for a working sample.
(I'm not a friend of editing post after someone answered it, but i am to "embarrassed" about my post 
Thanks to Philip Fitzsimons and Richard Deeming.
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Could be something to do with the fact that MyChildClass.generateShowMe returns "ShowMe from MySuperClass" instead of "ShowMe from MyChildClass". 
cabo wrote:
public class MyChildClass : MyBaseClass {
protected override string generateShowMe() {
return "ShowMe from MySuperClass";}
public new void ShowMe() {
base.ShowMe();}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
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lol 
"When the only tool you have is a hammer, a sore thumb you will have."
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This should work:
C#:
public class MySuperClass
{
protected virtual string generateShowMe()
{
return "ShowMe from MySuperClass";
}
public virtual void ShowMe()
{
Console.WriteLine(generateShowMe());
}
}
public class MyChildClass : MySuperClass
{
protected override string generateShowMe()
{
return "ShowMe from MyChildClass";
}
public override void ShowMe()
{
base.ShowMe();
}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
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Thanks, i should know that this works...
But it was in a more complex code, with some unfinished API's, switched between C++/C#/Java and the weather was bad...
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i noticed with a rtf box when i select a text that has diffrent size text to it and diffrent colors,and i change the fontstyle of the selected text...it changes the colors, and font of the entire selected string. and doesnt keep intact the individual styles of each char in the selected text.
The teacher at my school asked us to write a method that would take into account each individual char's size, font, color ect. I have been trying to iterate through the rtf.SelectedText collection and isolate each char but how do i get the font and color of a single char in a rtf box ? Does this question make any sense? if not let me know and ill try to rewrite it . anywho any ideas would help...
Jesse M
The Code Project Is Your Friend...
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You need to go through your selection char by char (you can do a select(i,1) in a loop from start of select to end), and then for each char in selection, you can get the color by the oRTFBox.SelectionColor property.
I just had to do something very similar to this. If you get stuck email me (from link) and I can email a code example.
There are only 10 types of people in this world....those that understand binary, and those that do not.
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i whipped something together...maybe you can help me work with it. it doesnt seem to work correctly because the Rtf.Select() requires a start index....how can i find the start index of a specific char in the selected text ? heres the code i just kinda through together.
<br />
char[] chars = GetMainFormData.MainTextArea.SelectedText.ToCharArray();<br />
Color[] cls= new Color[chars.Length];<br />
int count =0;<br />
int tmp = GetMainFormData.MainTextArea.SelectedText.Length;<br />
for(int i =0;i<tmp;i++)<br />
{ <br />
GetMainFormData.MainTextArea.Select(GetMainFormData.MainTextArea.SelectedText[i],1);<br />
Color tmp1 = GetMainFormData.MainTextArea.SelectionColor;<br />
cls[count] = tmp1;<br />
GetMainFormData.MainTextArea.SelectionFont = fd.Font;<br />
GetMainFormData.MainTextArea.SelectionColor = cls[count];<br />
count++;<br />
}<br />
Any ideas ?
The Code Project Is Your Friend...
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Here is some code I used for my latest project where I had to do something similar.
----------------
<br />
int iIndex = 0;<br />
<br />
while ( iIndex < (oBox.TextLength) )<br />
{<br />
<br />
oBox.Select(iIndex,1);
<br />
if (null != oBox.SelectionFont)<br />
{<br />
iSelectedCharTextSize <br />
= getTextSizeFromFont(oBox.SelectionFont);<br />
}<br />
<br />
if (true != oBox.SelectionColor.IsEmpty)<br />
{<br />
strSelectedCharColor <br />
= getHexColorString(oBox.SelectionColor);<br />
}<br />
--------------
You see, though, I went through the whole box from the beginning...not just using what was selected. So you will probably have to find the beginning index based on what is selected. I wouldn't think it would be that hard.
good luck.
chris
There are only 10 types of people in this world....those that understand binary, and those that do not.
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thanks for the code...ill have to work on it tonight =)...anywho...is getHexColorString , getTextSizeFromFont a function you wrote ? what do those functions do if so ?
thanks
Jesse M
The Code Project Is Your Friend...
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Yes, getHexColorString and getTextSizeFromFont are my own methods. Sorry...had I realized I had left them in, I'd have taken them out so as not to confuse you.
getHexColorString() takes the current char, determines the color and returns the number representing the color as a hexadecimal string (e.g. black text would return "000000").
getTextSizeFromFont() gets the font size and determines which HTML text size most closely matches it.
As you may have guessed, what I'm writing is something similar (but not quite) like an RTF2HTML conversion program.
There are only 10 types of people in this world....those that understand binary, and those that do not.
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int iIndex = 0;<br />
int SelSt = GetMainFormData.MainTextArea.SelectionStart;<br />
Color[] jr = new Color[GetMainFormData.MainTextArea.SelectedText.Length];<br />
Font[] fr = new Font[GetMainFormData.MainTextArea.SelectedText.Length];<br />
int tmp = GetMainFormData.MainTextArea.SelectionLength;<br />
GetMainFormData.MainTextArea.Visible = false;<br />
while ( iIndex < (tmp) )<br />
{<br />
GetMainFormData.MainTextArea.Select(SelSt,1);<br />
if (null != GetMainFormData.MainTextArea.SelectionFont)<br />
{ <br />
fr[iIndex] = GetMainFormData.MainTextArea.SelectionFont;<br />
Font tmpF = (Font)fr[iIndex];<br />
if(tmpF == fd.Font)<br />
{<br />
GetMainFormData.MainTextArea.SelectionFont = fd.Font;<br />
}<br />
else if(tmpF != fd.Font)<br />
{<br />
Font fonf = new Font(tmpF.FontFamily,fd.Font.Size,fd.Font.Style);<br />
<br />
GetMainFormData.MainTextArea.SelectionFont = fonf;<br />
}<br />
}<br />
if (true != GetMainFormData.MainTextArea.SelectionColor.IsEmpty)<br />
{<br />
jr[iIndex] = GetMainFormData.MainTextArea.SelectionColor;<br />
GetMainFormData.MainTextArea.SelectionColor = jr[iIndex];<br />
}<br />
SelSt++;<br />
iIndex++;<br />
}
Jesse M
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What are the C# equivalents of the C/C++ HIWORD/LOWORD/HIBYTE/LOBYTE macros? In VB6 I had to write my own, but surely C# must have them.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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static int HiWord(int Number)
{
return (Number >> 16) & 0xffff;
}
static int LoWord(int Number)
{
return Number & 0xffff;
}
All I need is a roadmap and then I might be able to find a clue.
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Thanks. That's what I ended up doing - just re-writing the C++ macros myself.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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I have a ActiveX control written in MFC, and I am now using it in .Net, however, I can not figure out how to use the EventHandler for this ActiveX control. For example, "DoubleClick" event is supposed to return back extra parameters from the ActiveX control, how do I get these information? using a derived EventArgs class? who will be creating these EventArgs instances?
Thanks.
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Is there an equivalent of the DrawState() API in .NET? If not, I can write my own, but I didn't want to re-invent the wheel.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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jdunlap wrote:
Is there an equivalent of the DrawState() API in .NET?
Bits and pieces are implemented, see the System.Windows.Forms.ControlPaint class.
jdunlap wrote:
If not, I can write my own, but I didn't want to re-invent the wheel.
You could use P/Invoke to call the original API 
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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James T. Johnson wrote:
Bits and pieces are implemented, see the System.Windows.Forms.ControlPaint class.
OK, I'll look at that.
James T. Johnson wrote:
You could use P/Invoke to call the original API
But I'm wanting to use GDI+ objects without converting them to Windows GDI objects.
Thanks for your time!
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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jdunlap wrote:
But I'm wanting to use GDI+ objects without converting them to Windows GDI objects.
Ahhh, that could be a problem. During last year's screen saver competition I cursed at MS enough about not being able to mix .NET GDI+ objects and C++ GDI+ objects, even though it does this internally (as seen through Anakrino).
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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I've decided to implement DSS_MONO and DSS_DISABLED by making a region excluding the transparent areas and light areas, and then filling the resulting region with the brush passed in. (The brush can be any brush, including semi-transparent and gradient brushes. ).
If you have better ideas, let me know.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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Mission accomplished!
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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Well, beforehand I need to say I must be doing something fundamentally wrong, but I simply cannot see it. Maybe it’s something on machine.config, or web.config, but I was not able to find it anywhere else.
The problem is: my webservices are being handled in a single thread on the server. I compiled release, disabled debugging, tried almost everything. And my webservice seems to be handled only on a single thread.
A simple code that shows this is:
[WebMethod]
public int MyWait(int Waittime)
{
DateTime dt = DateTime.Now.AddSeconds(Waittime);
while (DateTime.Now < dt)
;
return Waittime;
}
As you can see, if you start the webservice and quickly call it twice (I’m testing with IE and the quick test page), passing 20s as the time, you should have both answers in 20s, if there were two threads. The problem is:the second request returns after 40s.
I know that changing this loop for Sleep() solves the problem, but my real code is much more complicated, and has to process several requests simultaneously.
I simply cannot believe that ASP.NET webservices are single threaded.
My latest article: GBVB - Converting VB.NET code to C#
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