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Split Double Values?

i have two values written like this " +5.000" (first space then plus and the double value, double value is height in meters)
the first one is on textBox and second one is i'm receiving via ref key.
simply enough i want to get the result firstvalue - secondvalue = result
for example ( +5.000 - +2.800 = 2.200)
result only in digits without plus.
i have asked this question also on c# forum
https://social.msdn.microsoft.com/Forums/en-US/a024e097-8013-4771-bbf6-99c7fd4cf457/double-split-
Thanks and Best Regards

OK, I think you're trying to solve a few problems here in one question. Let's break it down.
You need to get a value from a text box. I'll assume its called txtBox in the absense of any code, so you need to write:
double a = Double.parse(txtBox.Text);
You then need to perform your calculation. This needs to be written the other way around, for example:
result = a - b;
With limited source code it's difficult to answer properly.

Does textbox save an all number text as a long or string?

I have a brief discussion with my teammate regarding this. He says, if I enter a number in textbox, and try to use the value later on using textbox.text or val(textbox.text), I will not need to parse the value to integer. According to him, if the text attribute value is all number, you can directly get the value as integer, instead of string.
So, if I have textBox1.Text = "12345", then next time, if I use, intABC = textBox1.Text, it will not throw an error. Is it right? Does C# or other .Net language does this implicit conversion? Also, will the code store "12345" as string or integer? And how much memory will this value take, 5bytes for 5 characters or 2bytes for an integer?

TextBox.Text keeps the text as a simple string, it doesn't care about the real "meaning" of the string.
Then, if you want to have your number back, you need to parse the string, hence neither implicit nor explicit cast to int is allowed (or better, it will throw an exception if you do it...).
About the size, that text is stored as an UNICODE (UTF-16) string, hence from 2 to 4 bytes per character (depending on the character).
You can easily measure the size (just the size of the string, without the overhead due to reference size etc.) using the following code:
int numBytes = Encoding.Unicode.GetByteCount(stringToMeasure);
To find more info about strings, unicode and encodings have a look here, here or here .

your friend is wrong, it will make the compiler unhappy, the compiler won't even convert it automatically for you. Text property of a TextBox is of type string. check this
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.textbox.text.aspx

As to your question of other languages; if 'option strict' is not enabled, VB.NET will allow this. It will also allow this assignment if the input is not entirely numeric however, resulting in a runtime exception.

If you know you will only use numerical values, try using a NumericUpDown control.
You could then get/set the numerical value (decimal) by using the Value property.
A NumericUpDown control contains a single numeric value that can be incremented or decremented by clicking the up or down buttons of the control. The user can also enter in a value, unless the ReadOnly property is set to true.

C# - Suggestions of control statement needed

I'm a student and I got a homework i need some minor help with =)
Here is my task:
Write an application that prompts the user to enter the size of a square and display a square of asterisks with the sides equal with entered integer. Your application works for side’s size from 2 to 16. If the user enters a number less than 2 or greater then 16, your application should display a square of size 2 or 16, respectively, and an error message.
This is how far I've come:
start:
int x;
string input;
Console.Write("Enter a number between 2-16: ");
input = Console.ReadLine();
x = Int32.Parse(input);
Console.WriteLine("\n");
if (x <= 16 & x >= 2)
{
control statement
code
code
code
}
else
{
Console.WriteLine("You must enter a number between 2 and 16");
goto start;
}
I need help with...
... what control statment(if, for, while, do-while, case, boolean) to use inside the "if" control.
My ideas are like...
do I write a code that writes out the boxes for every type of number entered? That's a lot of code...
..there must be a code containing some "variable++" that could do the task for me, but then what control statement suits the task best?
But if I use a "variable++" how am I supposed to write the spaces in the output, because after all, it has to be a SQUARE?!?! =)
I'd love some suggestions on what type of statements to use, or maybe just a hint, of course not the whole solution as I am a student!

It's not the answer you're looking for, but I do have a few suggestions for clean code:
Your use of Int32.Parse is a potential exception that can crash the application. Look into Int32.TryParse (or just int.TryParse, which I personally think looks cleaner) instead. You'll pass it what it's parsing and an "out" parameter of the variable into which the value should be placed (in this case, x).
Try not to declare your variables until you actually use them. Getting into the habit of declaring them all up front (especially without instantiated values) can later lead to difficult to follow code. For my first suggestions, x will need to be declared ahead of time (look into default in C# for default instantiation... it's, well, by default, but it's good information to understand), but the string doesn't need to be.
Try to avoid using goto when programming :) For this code, it would be better to break out the code which handles the value and returns what needs to be drawn into a separate method and have the main method just sit around and wait for input. Watch for hard infinite loops, though.
It's never too early to write clean and maintainable code, even if it's just for a homework assignment that will never need to be maintained :)

You do not have to write code for every type of number entered. Instead, you have to use loops (for keyword).
Probably I must stop here and let you do the work, but I would just give a hint: you may want to do it with two loops, one embedded in another.
I have also noted some things I want to comment in your code:
Int32.Parse: do not use Int32, but int. It will not change the meaning of your code. I will not explain why you must use int instead: it is quite difficult to explain, and you would understand it later for sure.
Avoid using goto statement, except if you were told to use it in the current case by your teacher.
Console.WriteLine("\n");: avoid "\n". It is platform dependent (here, Linux/Unix; on Windows it's "\r\n", and on MacOS - "\n\r"). Use Environment.NewLine instead.
x <= 16 & x >= 2: why & and not ||?
You can write string input = Console.ReadLine(); instead of string input; followed by input = Console.ReadLine();.

Since it's homework, we can't give you the answer. But here are some hints (assuming solid *'s, not white space in-between):
You're going to want to iterate from 1 to N. See for (int...
There's a String constructor that will allow you to avoid the second loop. Look at all of the various constructors.
Your current error checking does not meet the specifications. Read the spec again.
You're going to throw an exception if somebody enters a non-parsable integer.
goto's went out of style before bell-bottoms. You actually don't need any outer control for the spec you were given, because it's "one shot and go". Normally, you would write a simple console app like this to look for a special value (e.g., -1) and exit when you see that value. In that case you would use while (!<end of input>) as the outer control flow.

If x is greater or equal to 16, why not assign 16 to it (since you'll eventually need to draw a square with a side of length 16) (and add an appropriate message)?

the control statement is:
for (int i = 0; i < x; i++)
{
for ( int j = 0; j < x; j++ )
{
Console.Write("*");
}
Console.WriteLine();
}
This should print a X by X square of asterisks!
I'ma teacher and I left the same task to my students a while ago, I hope you're not one of them! :)

Find the x, y point of a string within a text box

Is there a way to return a point for a string within a text box? I found a COM function GetTextExtentPoint that will return the length of a string, but I want to know the point where the string starts.

You're looking for the GetPositionFromCharIndex method.

First, figure out the index of the first character of the string.
int index = textBox1.Text.IndexOf(someString);
Then use GetPositionFromCharIndex.
Point stringPos = textBox1.GetPositionFromCharIndex(index);
(Code not tested, but something like this should work. Of course you will have to deal with the possibility of duplicate occurrences of your string in the textbox.)

what comes to mi mind is to take a snapshot of both the form and text then do some fancy image comparing to find the starting point.. but for this you need to write/download a library that has theese comparing methods... thus becoming very complicated...
why do you need to do this?

can int store string value in c#

I am working on the front end of an application. I have to introduce one more filter criteria LoanNumber. Now loan number is E-100. Business layer and domain object is not in my control. So i cannot change it. Domain object which holds loannumber is integer, I have to do
ingeoFilterData.intLoanNumber="E-100"
ingeoFilterData is the domain object. intLoanNumber is declared as Nullable Int32 Now this domainobject is very critical and it goes to some external engine,so i cannot change it.
Please suggest some workaround.
Edit-
I am copying down loannumber from database table.
RT1
RT2
PT1
pt10
PT11
PT12
PT13
PT14
PT15
pt16
pt17
pt8
pt9
MDR1
MDR2
MDR3

If you have only one character, you can do this:
multiply your int by 100. (for example E-51 -> 5100)
Then keep the char as int in the rest of the number (for example 5106).
Do the reverse when you need to show the UI id (E-51).
If you have no limitations (as you mentioned) then you can have your int as a protocol (according to me that is even harder because you are limited by Int32 - 4,294,967,296).
You can set your number to something like
<meaning><number><meaning><number>
and meaning is - 1 - number, 2 - letter, 3 - hyphon.
then 11 will mean 1; 201 will mean A, 3 will mean hyphon, and 113201 will mean 1-A;
It's complicated and not very likely to be usable...
This solution limits your id to length of 5 numbers or 3 letters and 1 number. You can squeez some more by using your int bit-wize and optimize your "protocol" as much as possible.
I hope this helps,
Danail

Is "E-100" a string. ie. E is not a variable?
No, you can't set an int to a string value.

No, an int type cannot store a string. But you can parse your value to an int, before passing this to your domain object for filtering.

If the "prefix" of the loan number is always "E-" you could just exclude it.
Otherwise maybe you could add a property "LoanNumberPrefix" and store the "E-" in it.

Unfortunately at some point, bad design will give you unsolvable problems.
I don't know if this is one of them, but if the domain model has specified that loan numbers are integers, then either you, or the people that made that model clearly hasn't done their job.
Why the E in there? What does it signify? Is it just a prefix, can you remove it when storing it and put it back before displaying it?
Unfortunately, if the prefix can change, so that at some point you will have F-100 and so on, then you need to find a way to encode that into the integer you send to the domain model and business logic.
If you can't do that, you need to find a different place to store that prefix, or possibly the entire code.
If you can't do that, well, then you're screwed.
But to be blunt, this smells badly of someone who has been asleep while designing.
"Yeah, that's a good idea, we'll make the loan identification number an integer. I know somewhere, someplace, that someone has an example of what those loan identification numbers look like, but it's just numbers right? I mean, what could go wrong...?"

i think thats possible if you can convert the char into ASCII code.
string --- ASCII
0-10---48-57
A-Z----65-90
a-z----97-122
check out the ASCII table for more info..
Conversion:
so you can convert
RT1 to 082084049
RT2 to 082084050 and
MDR3 to 077068082051
i just prepend 0's to each character if the value is not 3 digit one(because max possible ASCII (z) value is in 3 digits ). R is actually 82, it becomes 082. And the final integer (no of digits) would be in multiples of 3.
Extraction:
This helps to extract the info in the other end. just split this into seperate 3 digit values and convert them to char and append them. you wil get the final string.
082,084,049 - R,T,1. thats all.
p.s: this method may end up in arithmetic overflow problem for large strings

I suggest that you talk to someone in the business/domain layer, or who is responsible for the design of the system, and point out to them that loannumber need to be changed to a string. No one will thank you for bodging your code to get around what is a design flaw--it can only lead to trouble and confusion later.