Error message during calculation

Question

Anyone, please take a look at my line of code.

int totalValue = 0;
    totalValue = int.Parse(Label9.Text) * int.Parse(Label6.Text);
    Label8.Text = **totalVa         


        

Answer 1

That's because totalValue is an int.

Try this:

Label8.Text = totalValue.ToString();

Answer 2

Using the text directly is not a good way, what if parsing fails?

Use

int? val1=GetInt32(Label9.Text);
int? val2=GetInt32(Label6.Text);

if(val1!=null&&val2!=null)
{
int totalValue = 0;
    totalValue = val1+val2;
Label8.Text = totalValue.ToString();
}
//You can also write your own logic on the TextBoxs if they did not contain a valid value by checking if val1 or val2 are null or not

Using the function to return int value if the input can be converted.

  public  int? GetInt32(string s)
    {
        int i;
        if (Int32.TryParse(s, out i)) return i;
        return null;
    }

Answer 3

try this:

int totalValue = 0;
totalValue = int.Parse(Label9.Text) * int.Parse(Label6.Text);
Label8.Text = totalValue.ToString();

Answer 4

You should convert int to string. Something like this:

Label8.Text = totalValue.ToString();

Or this:

Label8.Text = totalValue + "";