This app is capable of performing addition, subtraction, multiplication as well as division. View All. Vishal Prajapati Updated date Nov 06, Press OK. Perform some changes in properties as shown in figure.
Step 4 Now, we start working with the display, usually when the calculator starts it should display the number 0. In our case it does not.
So we modify the Text Property and write 0 in that. Once you resize all the buttons, then you can change the text of the button. Step 8 Finally, the page looks, as shown below.
Step9 You can add the code inside the button. Calculator C. Like operator pressed multiplies accumulator with the current value. Did you got bored in 15 minutes. Seems so! Yes, I did leave most of the work to the reader. That was the point. This was an exercise for a class, and I am not helping them if I give them the answers. This is a tip, not and article. Tips are not intended to go into great detail.
Pressing an operator completes the previous operation, not the current one. If you pick up a cheap calculator, you will find that this is how they work. What the display UI reads at each step depends on the desired behaviour. The poster's question was how to handle more than 2 numbers and 1 operator.
No, I didn't get bored. I took time out of my workday to answer the poster's question. Answering the question, writing the code, and writing the article took one hour, which is one hour I don't get paid.
You can click Add your own alternative version if you have a better solution. Never delete events just by removing the handler method from the code. The designer would stop working, and you'd have to fix its file specifically, remove the assignment of a no longer existent method to the event. The only correct way is to use the designer. Let's move to the calculation itself. The code won't be complicated at all. We'll simply just use conditions for the operationComboBox items and calculate the result inside the event handler of the button accordingly.
Then we'll set the result as the text of resultLabel. We shouldn't forget to handle division by zero. First, we store the values from the controls in variables to make the code more readable. We access the selected comboBox item using the SelectedItem property, which is of the object type.
This means we have to convert it to string in our case. Similarly, we could also use just the item index using SelectedIndex. Since NumericUpDown returns the value in its Value property which is of the decimal type, we must convert it to the double type using the Convert class. For the case of zero divisor, we display a MessageBox using the static class of the same name and calling the Show method.
Finally, we display the result in resultLabel. Unlike the console, where we could simply print the numbers, we must first convert the numbers to string here. Like this, the form will be created in the center of the screen. We can also disable window maximization using the MaximizeBox property. The code is available in the article's attachment as always. In the next lesson, Birthday Reminder - Designing Forms , we'll create a more complex app using multiple forms - a birthday reminder. Did you have a problem with anything?
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