Check low

Prime b

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?

3 Replies

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Sam Hobbs15y ago
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.
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Prime b15y ago
ty Vulpes!
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Vulpes15y ago
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 :)
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