C# Beginner winforms ToString

Question

Hi I'm trying to multiply 2 numbers together in a simple winform application. The method for multiplying is in the class below and then called in the form when you click a button. I have label called answerText and I'm trying to print my answer in that. my line test.multiplynumbers.Tostring is wrong but not sure what to do there?

namespace WindowsFormsApp3
{
class Sums
{
    public int multiplynumbers(int num1, int num2)
    {
        return num1 * num2;
    }
}

}

and

namespace WindowsFormsApp3
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void AnswerButton_Click(object sender, EventArgs e)
    {
        Sums test = new Sums();

        test.multiplynumbers(5, 2);
        answerText.Text = test.multiplynumbers.ToString;

    }
}
}

The actual error message is *CS0428: Cannot convert method group 'ToString' to non-delegate type 'string'. Did you intend to invoke the method?*. See duplicate for the solution (you need parenthesis). — Patrick Hofman, Jun 19 '17 at 09:25

score 0 · Answer 1 · answered Jun 19 '17 at 09:22

0

Assign the result to a variable and then use ToString()

 int result = test.multiplynumbers(5, 2);
 answerText.Text = result.ToString();

answered Jun 19 '17 at 09:22

Sajeetharan

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score 0 · Answer 2 · answered Jun 19 '17 at 09:27

0

You can do:

int result = test.multiplynumbers(5, 2);

then

answerText.Text = result.ToString();

or

answerText.Text = Convert.ToString(result);

answered Jun 19 '17 at 09:27

ΦXocę 웃 Пepeúpa ツ

47,427
17
69
97

score -1 · Answer 3 · answered Jun 19 '17 at 09:22

-1

ToString is a method and therefore needs (). Update your code like this:

namespace WindowsFormsApp3
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void AnswerButton_Click(object sender, EventArgs e)
    {
        Sums test = new Sums();

        int res = test.multiplynumbers(5, 2);
        answerText.Text = res.ToString();

    }
}
}

answered Jun 19 '17 at 09:22

Romano Zumbé

7,893
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Why the downvote? – Romano Zumbé Jun 19 '17 at 09:23
1

I don't get it. Sometimes this community is really messed up. – Romano Zumbé Jun 19 '17 at 09:25
While I didn't vote, I hardly see the usefulness to answer this kind of questions. – Patrick Hofman Jun 19 '17 at 09:27
I downvoted your first answer as it was wrong. Once you edited it i removed my downvote, but maybe others didn't wait to see that. – Pikoh Jun 19 '17 at 09:29
I also think my answer is of no use for the rest of us. But is of use for the op. But I would not be disappointed if it was deleted. @Pikoh you're right. My bad – Romano Zumbé Jun 19 '17 at 09:31

C# Beginner winforms ToString

3 Answers3