[ZkP]

I'm new to this so bare with me... I'm tying to make a label decrease in a number but I keep getting errors when I try to.

The codes are part of a timer, the error is in the 4th line of this:

            int y = 1;
            string n = "60";
            label1.Text = n;
            label1 = label1.Text - y;

That's my most recent attempt, can anyone tell me what its suppose to be?

[Momerath]

The label is a String. You can't subtract an int from a String. You might want to Convert the string to an int, to the subtraction, then convert the result back to a string.

[h4nnib4l]

Take a look at the int32.TryParse() method.

[November-06]

The error should be on this line

label1 = label1.Text - y;

You are assigning the result to a label which is label1 instead of label1.Text

It should be

label1.Text = label1.Text - y;

Also, like the others said, you should parse the string so that it will be converted to integer or float or double (depends on what data type you need)

After you add validation, you may parse it

label1.Text = int.Parse(label1.Text) - y;

This post has been edited by November-06: 31 January 2013 - 06:14 PM

[andrewsw]

The previous post has:

label1.Text = int.Parse(label1.Text) - y;

This still needs to be cast back to a string:

label1.Text = (int.Parse(label1.Text) - y).ToString();

But TryParse (as mentioned earlier) would be better so that an Exception isn't raised.

This post has been edited by andrewsw: 31 January 2013 - 06:53 PM

[andrewsw]

            int theNumber;
            bool success = int.TryParse(label1.Text, out theNumber);
            if (success) {
                label1.Text = (theNumber - y).ToString();
            } else {
                // Doh! Not an integer..
            }