No, you declared it properly, you did not assign it at all. There is a difference in declaration and assigning, and that concept is similar in C#, C++ and other similar C-family of languages.
The problem persists, because, you cannot expect C# to run like C++, in C#, you need to assign a default value (which differs in structs and class types and I do not want to confuse you on that topic), whereas in C++ you can leave that part and something good (or bad) comes there at that memory address. For the time being, let's just say you want to have a default value of the cookies (which can be, 0, 1, 2,... 10 or whatever), so you do the following,
int cookies = 2; // Or any// Now the framework allocates a memory for "cookies" and places "2" there.
Now when you will move onwards you will not get an error on the cookies variable.
But since the multiplication has to work with totalCalories as well, I would leave that upto you to fill and proceed further in the program. Try giving it a value and running the program.
Secondly, I also hope you are not expected to ask for inputs, also you have not shown that attempt so I assume you are allowed to hardcode the amount of these variables.
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I am developing a Web Application with Asp.NET MVC5. As I dont have much experience, I am stuck with a functionality using JQuery and Partial View.
I have a Side Menu as a partial view in a page. This partial view contains a DropdownList which is populated from model, and it works fine. However, I want to display a list of items from the db when the dropdown is selected, based on the selection, which is not working.
Partial View (_UserPartialView)
var item = $(this).val();
$.get("/Controller/GetItems/" + item, function(data)
public ActionResult (int id)
var test = db.Users.Where(e => e.cId = id);
return PartialView(" _UserPartialView", test);
So, I'm very very new to C# and programming, but doing some experiments on my own. I created a Database with 3 tables: Student_table: Student_ID, Name, Surname; Course_table: Course_ID, CourseName; Student_Course_table: Student_ID, Course_ID. There is a relationship between them. Database part I'm OK.
Now on C# I created 2 forms. 1 Form fills the Course_table. The other Form fills the Student_table, but I have a combobox in the Student Form that lists the CourseName, reading from the Course_Table. I want that when the SAVE button is selected, the Student_Course_table is filled using the Student_ID and the Course_ID according to what course the user choose from the drop-down. I can fill the Student_ID in the Student_Course_table but don't know how to fill the Course_ID....any help please? Thanks.
And use the collection as the DataSource property of your Combobox.
Because you override ToString, the comboBox will display the Text Description for the elements, but the SelectedItem property will return an instance of the Course class.
You have to cast it to use it:
That's not simple - or particularly useful!
You can do it, but ... You will need to make sure that it is only ever stored as a non-lossy format image: BMP or PNG are good, JPG is bad. Lossy formats will throw away too much info.
Read the image using LockBits (This will help: Getting RGB array from image in C# - Stack Overflow[^]) encrypt the pixel data, and put it back. Do note that the bitmap data is fixed size: so your encryption must not generate a bigger or smaller output, or the image will not be right (any possibly not reversible).
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