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Numbers from textboxes are add next to eachother insted of adding them together

November 12, 2022

I have 3 textboxes in which I write numbers and 1 in which is the result. If I write numbers in TextBoxA and TextBoxB insted of adding them together after I press equal button it put them next to eachother.

[ It look like this ]

I tried this code:

 private void EqualsButton_Click(object sender, EventArgs e)
        {

            OutputTextBox.Text = ($"{InputTextBoxA.Text + InputTextBoxB.Text}");

        }

>Solution :

You need to convert text fields to int and after for the answer back to the text.

If you did not enter a value, then there "" is considered as 0 when adding.

private void EqualsButton_Click(object sender, EventArgs e)
{
  OutputTextBox.Text = Convert.ToString(
    Convert.ToInt32(InputTextBoxA.Text == "" ? "0" : InputTextBoxA.Text) 
    + Convert.ToInt32(InputTextBoxB.Text == "" ? "0" : InputTextBoxB.Text));
}