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In general we don't care that much what the underlying value of an enum is.(We are more interested in readability for instance).
When you start out in c# you will often have these moments when you don't see why you have to do things, especially when those things involve casting. The aim here is to remove ambiguity. I would say that most times when i use an enum i would want to pass Cars.Honda and not the value 3.
How about the method GetInCar()
we might declare it as
public void GetInCar(Cars carToGetIn)<br />
{<br />
this.CurrentCar = carToGetIn;<br />
}
If you want to get in the Honda we would call the method
GetInCar(Cars.Honda);
If we want to find which car we're in
public Cars WhichCarAmIIn() <br />
{<br />
return this.CurrentCar;<br />
}
If we've done everything right this should return Cars.Honda
We never really need to know what the value is for most stuff that we do. There are times that we will need to know, but often it's enough to know that the values are unique for each item
HTH
Russ
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Thanks everyone for your explanations. Russ thanks for your explanation. You brought back some memories that I had from my old C++ classes.
It's funny but I don't think VB.NET prints enums out the same as C# does. I started out in VB and I occassionally used enums but I always used them is SELECT CASE statement getting the value rather than the actual string value. Interesting, I know the two languages are different but didn't think the enums would differ that much. Thanks again.
Terrance C.
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You should be able to do the same thing in both c# and VB. I guess that VB does some sort of auto casting when you try to compare an enum with an int. c# won't do the cast for you but you could do it yourself.
switch(CarType)<br />
{<br />
case Cars.Honda:<br />
DoHondaThing();<br />
case Cars.Jaguar:<br />
DoJaguarThing();<br />
}<br />
<br />
switch((int)CarType)<br />
{<br />
case 1:<br />
DoHondaThing();<br />
case 2:<br />
DoJaguarThing();<br />
}
Both are syntactically valid but i know which i'd rather be reading 6 months after I coded it. Also if i add an item at position 2 making Jaguar = 3 without changing the second switch statement we could be in trouble.
Russ
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I'm trying to write some code that pops up a little borderless form next to the notification area when a notification icon is double clicked. The code is going to be used in the office and most people here have 2 monitors and several people have left / right / top taskbars.
How do i find the current location of the SysTray?
Thanks
Russell
-- modified at 10:26 Wednesday 14th February, 2007
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Try the static Cursor.Position property. I think it would be the easiest way to open the form where the user performed the double-click.
"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 Cook www.troschuetz.de
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Hi,
I want to create an entry of my software on the left-click menu of microsoft office documents. (i.e when you press left-click on a word document you see "Print", "Open" etc. in the menu.
Please let me know if my question is not clear enough, or if you have a solution for it.
Thank you!
Nauman
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I want to install a specific font with a Windows application. I have added the font to the deployment project, but do not know how to target the font to the C:\Windows\Font folder. Thanks.
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how about copying it there?
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Will not work, it has to be installed!
I'm also looking for a code solution fro that.
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Hi, I need a FTP client and FTP server source code for Linux, please, help me.
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err..since C# is a microsoft language this would be the LAST place you should ask in o_O
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Have people never heard of Google[^]?, I just typed in Linux ftp server and that was the third hit.
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I am running through a list (named sublist in my code) of lines checking to see if any match where the user has clicked. At the moment I am using the following code which does work
bool test = false;
int hold;
int i =0;
while (!test && i < sublist.Count)
{
test = sublist[i].DeleteLine(new Point(e.X, e.Y));
if (test)
hold = i;
i++;
}
If there is a match I will delete the line from the list, so I need to know the location where the match occurred. I would like to just be able to use i, but either I get an out of bounds error or miss the last line in the array. I have looked at do/while with the same results. With for/foreach I either go through the whole list and still need to remember where the match occurred or use break which I understand is poor coding practice in a for loop.
My question is, is there a way to not have to use the variable hold with a do/while or while loop?
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Try looping backwards from sublist.count to 0.
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there is nothing wrong with using break in this case, try this;
int i=0;
do
{
if (sublist[i].DeleteLine(new Point(e.X, e.Y)))
break;
} while (i++ < sublist.Count);
If you are determined not to use a break you can do something like this, but I think the first example is easier to read and understand.
int i=0;
do { } while ( !sublist[i].DeleteLine(new Point(e.X, e.Y)) && (i++ < sublist.Count ));
Tara
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try this:
int i=0;
do { } while ( !sublist[i].DeleteLine(new Point(e.X, e.Y)) && (i++ < sublist.Count ));
actually I would prefer to use the break statement, it is easier to understand
int i = 0;
do {
if ( sublist[i].DeleteLine(new Point(e.X, e.Y) ) )
break;
} while (i++ < sublist.Count);
Tara
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Hi,
you have an index (i), an initialisation, a continuation test, and an increment.
That is called a for loop.
To avoid needing the index outside the for loop, do the delete inside it,
something like:
for (int i=0; i<count; i++) {
if (some test) {
do whatever needs to be done to item i
break;
}
}
There is nothing wrong with break; it is intended to be used for an early termination
of a loop, so it is a natural here.
Luc Pattyn
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I hav 100 records in a dataset.how can i fetch the first 5 records from the dataset
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I know that when you have a sql statement MySql support Limit 5. Then you get 5 records. But i dont know if all the database applications support it. Hope it helps.
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select top 5 fieldname1, ....
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<br />
ResultForm.richTextBox1.Text += "Return Result # " + (beginResultPage + i + 1).ToString() + "\r";<br />
ResultForm.richTextBox1.Text += gresult.resultElements[i].title + "\r";<br />
ResultForm.richTextBox1.Text += gresult.resultElements[i].snippet + "\r";<br />
ResultForm.richTextBox1.Text += gresult.resultElements[i].URL + "\r\r";<br />
Hi
from the codes above, i want to bold some of the results that is recieved through the richTextBox control in the form.
For eg, if i want to make bold the title that is produced using this line of code,
ResultForm.richTextBox1.Text += gresult.resultElements[i].title + "\r";
What do i need to add in to ensure that the title is in bold?
I tried with FontStyle.Bold but i can't seem to get this right.
Help!,
frossie
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I would try selecting the relevant text then:
richTextBox.SelectionFont = new Font(richTextBox.SelectionFont, FontStyle.Bold);
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Problem: Hidden text not being set for RichTextBox initialized in an MDI Child Form.
Initialize a RichTextBox in an MDi Child form:
RichTextBox rtb = new RichTextBox();
rtb.SelectedRtf is initially set to empty string. Expected result is (rtb.SelectedRtf == "{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033\\uc1 }\r\n").
Also set rtb.SelectedRtf = @"{\rtf1\ansi " + "visibleText" + @"\v " + "hiddenText" + @"\v0}";
The result is rtb.Text = "visibleText". (rtb.Text should be "visibleTexthiddenText").
i.e. the hidden text is not being updated when rtb is initialized in an MDIChild.
Anyone know the cause/workaround? Your help is appreciated.
Thanks, B
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Hi
Is there a way to change the Form look so it will have round corners - or change it to a shape that I like? Draw it myself?
Is there a way to change the controlBox look as well - set different colors and different buttons?
I know that in c++ it's possible
thanks in advance
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Of course you can do it!
For example, in the Form1_Paint() handler you could use:
System.Drawing.Drawing2D.GraphicsPath gPath = new System.Drawing.Drawing2D.GraphicsPath();
System.Drawing.Rectangle formRectangle = this.Bounds;
gPath.AddEllipse(0, 0, formRectangle.Width, formRectangle.Height);
this.Region = new System.Drawing.Region(gPath);
This will turn your form into an ellipse.
Just use your imagination
SkyWalker
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