adding and subtracting values in textbox

karthik h

14y14.3k.NET

textBox10.Text = (Decimal.Parse(textBox8.Text)) - (((Decimal.Parse(textBox6.Text)) *(Decimal.Parse(textBox9.Text).ToString())));

guys i wanted to multiply textbox6 and textbox9 and subtract it to textbox8 i have coded it as above and i am getting error so please help me in this code thanks in advance

3 Replies

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Vulpes14y ago
Accepted answer
It would be easier if you split it up:

decimal temp = Decimal.Parse(textBox8.Text);
decimal temp2 = Decimal.Parse(textBox6.Text);
decimal temp3 = Decimal.Parse(textBox9.Text);
textBox10.Text = (temp - temp2 * temp3).ToString();

However, if you don't want to use intermediate variables, then this should work:

textBox10.Text = (Decimal.Parse(textBox8.Text) - Decimal.Parse(textBox6.Text) * Decimal.Parse(textBox9.Text)).ToString();
Satyapriya Nayak14y ago
Hi Karthik,

Try this...

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }



        private void button1_Click(object sender, EventArgs e)
        {
            textBox10.Text = Convert.ToString((Decimal.Parse(textBox8.Text)) - (((Decimal.Parse(textBox6.Text)) * (Decimal.Parse(textBox9.Text)))));


        }
    }
}

Thanks
Vulpes14y ago
Incidentally, if you do use intermediate variables, then it's easy to check for invalid input at the same time:

decimal temp, temp2, temp3;
bool isValid = Decimal.TryParse(textBox8.Text, out temp);
bool isValid2 = Decimal.TryParse(textBox6.Text, out temp2);
bool isValid3 = Decimal.TryParse(textBox9.Text, out temp3);

if (!isValid || !isValid2 || !isValid3)
{
textBox10.Text = "ERROR!";
}
else
{
textBox10.Text = (temp - temp2 * temp3).ToString();
}