How do I receive input to store as a string in a winforms project in C#?

Question

I'm working on a program that asks for input, then calculates and posts the output.

I managed to do it on a console application, but I don't know how to store input from a textbox.

The input has to be positive integers, with an error message in place if anything invalid is input (to prevent crashing).

I plan to have use a button to trigger the calculation and output, but I need to know how to store the input first.

Answer 1

add a click handler to your button with double-clicking on it. afterwards, insert the following code:

private void button1_Click(object sender, EventArgs e)
{
    string text = textBox1.Text;
}

the text from the textbox is now within variable text.

Answer 2

Store the input in instance variables. I believe that the information is stored in a property of the textfields. Something along the lines of

 theNameOfYourTextField.text

Answer 3

Double click your button to add a handler method, then grab the value from the field as an integer:

private void button1_Click(object sender, EventArgs e)
{
    int foo;
    int bar;
    if ( ! Int32.TryParse(textBox1.Text, out foo))
    {
        MessageBox.Show("Foo must be a number!");
        return;
    }
    if ( ! Int32.TryParse(textBox2.Text, out bar))
    {
        MessageBox.Show("Bar must be a number!");
        return;
    }
    // do something with foo and bar
}