How to set the Decimal Places in the NumericUpDown in C#?

In Windows Forms, NumericUpDown control is used to provide a Windows spin box or an up-down control which displays the numeric values. Or in other words, NumericUpDown control provides an interface which moves using up and down arrow and holds some pre-defined numeric value. In NumericUpDown control, you can set a number of decimal places which will display in the up-down control using DecimalPlaces Property. The default value of this property is 0. You can set this property in two different ways:

1. Design-Time: It is the easiest way to set the decimal places in the NumericUpDown as shown in the following steps:

  • Step 1: Create a windows form as shown in the below image:
    Visual Studio -> File -> New -> Project -> WindowsFormApp
  • Step 2: Next, drag and drop the NumericUpDown control from the toolbox on the form as shown in the below image:

  • Step 3: After drag and drop you will go to the properties of the NumericUpDown and set the decimal places in the NumericUpDown as shown in the below image:



    Output:

2. Run-Time: It is a little bit trickier than the above method. In this method, you can set a number of decimal places which will display in the NumericUpDown control programmatically with the help of given syntax:

public int DecimalPlaces { get; set; }

The value of this property is of System.Int32 types, which represents the number of decimal places to display in the up-down control. It will throw an ArgumentOutOfRangeException if the value of this property is less than 0 or greater than 99. The following steps show how to set the decimal place in the NumericUpDown dynamically:

  • Step 1: Create a NumericUpDown using the NumericUpDown() constructor is provided by the NumericUpDown class.
    // Creating a NumericUpDown
    NumericUpDown n = new NumericUpDown();
    
  • Step 2: After creating NumericUpDown, set the DecimalPlaces property of the NumericUpDown provided by the NumericUpDown class.
    // Setting the Decimal Places
    n.DecimalPlaces = 2;
    
  • Step 3: And last add this NumericUpDown control to the form using the following statement:
    // Adding NumericUpDown 
    // control on the form
    this.Controls.Add(n);
    

    Example:

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    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
      
    namespace WindowsFormsApp44 {
      
    public partial class Form1 : Form {
      
        public Form1()
        {
            InitializeComponent();
        }
      
        private void Form1_Load(object sender, EventArgs e)
        {
      
            // Creating and setting the
            // properties of the labels
            Label l1 = new Label();
            l1.Location = new Point(348, 61);
            l1.Size = new Size(215, 25);
            l1.Text = "Example";
            l1.Font = new Font("Bodoni MT", 16);
            this.Controls.Add(l1);
      
            Label l2 = new Label();
            l2.Location = new Point(242, 136);
            l2.Size = new Size(103, 20);
            l2.Text = "Select value:";
            l2.Font = new Font("Bodoni MT", 12);
            this.Controls.Add(l2);
      
            // Creating and setting the
            // properties of NumericUpDown
            NumericUpDown n = new NumericUpDown();
            n.Location = new Point(386, 130);
            n.Size = new Size(126, 26);
            n.Font = new Font("Bodoni MT", 12);
            n.Minimum = 1800;
            n.Maximum = 3000;
            n.Increment = 1;
            n.DecimalPlaces = 2;
      
            // Adding this control
            // to the form
            this.Controls.Add(n);
        }
    }
    }

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    Output:



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