I want to multiply two values

Question

i want to multiply two values one from the text box and the other from the combobox and put the values in next text box

Sandeep Singh Shekhawat · Answer

private void button1_Click( object sender EventArgs e) { int firstNumber = Convert .ToInt32( txtNumber.Text); int secondNumber = Convert .ToInt32(cmdNumber.Text); txtOutput.Text = (firstNumber * secondNumber).ToString(); }

Vulpes · Answer

Try: double value1 value2; double.TryParse(textBox1.Text out value1); double.TryParse(comboBox1.Text out value2); textBox2.Text = (value1 * value2).ToString(); Note that 0 is substituted if what's in the box can't be parsed to a double.

Satyapriya Nayak · Answer

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 WindowsFormsApplication5 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender EventArgs e) { double a; double b; double c; a = Convert.ToDouble(textBox1.Text); b = Convert.ToDouble(comboBox1.SelectedItem); c = Convert.ToDouble(a * b); textBox2.Text = c.ToString(); } private void Form1_Load(object sender EventArgs e) { comboBox1.Items.Add(2); comboBox1.Items.Add(3); comboBox1.Items.Add(4); } } }