Check low

Question

Here is what I was working on:

Create a GUI application that allows the user to enter
an hourly pay rate in a TextBox. When the user clicks
a button and the value in the TextBox is less than
$7.50, display an error message

This is my source code:

            double payrate;
            double actualyPayRate = 7.5;

            payrate = Convert.ToDouble(inputTextBox.Text);
            if (payrate < actualyPayRate)
                displayLabel.Text = "Illegal pay rate!";
            else
                displayLabel.Text = "Thank you!";

I am curious if there is another way to do the same work, any suggestions?

Sam Hobbs · Answer

It seems very common to use the Convert class and the Parse methods of data yet that shold be an uncommon choice. A better choice at least when data is coming from people are the TryParse methods such as Double . TryParse. That can be and should be used to ensure valid data and eliminate abnormal termination due to an unhandled exception. Alternatively you could use try/catch. When you are more experienced with C# you can develop a class derived from TextBox that ensures valid data interactively as the user types each key. As a beginner you can use the MaskedTextBox Class to do that.

Prime b · Answer

ty Vulpes!

Vulpes · Answer

Your solution has all the necessary steps: 1. Convert the input string to a double. 2. Check if it's less than 7.5. 3. Print an error message if it is. So no I don't think there is another way to do it :)