How to set Text in MaskedTextBox in C#?

In C#, MaskedTextBox control gives a validation procedure for the user input on the form like date, phone numbers, etc. Or in other words, it is used to provide a mask which differentiates between proper and improper user input. In MaskedTextBox control, you can set the text in the MaskedTextBox using the Text Property which will be displayed to the user. It is a default binding property for MaskedTextBox class. The strings retrieve from this property are formatted using the format properties like Mask, TextMaskFormat, etc. You can set this property in two different ways: 1. Design-Time: It is the easiest way to set the text in the MaskedTextBox 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 MaskedTextBox 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 MaskedTextBox and set the text in the MaskedTextBox 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 the text in the MaskedTextBox control programmatically with the help of given syntax:

public override string Text { get; set; }

The value of this property is of System.String type, which is will be displayed to the user. The default value of this property is empty. The following steps show how to set the text in the MaskedTextBox dynamically:

• Step 1: Create a MaskedTextBox using the MaskedTextBox() constructor is provided by the MaskedTextBox class.

  // Creating a MaskedTextBox
  MaskedTextBox m = new MaskedTextBox();
  

• Step 2: After creating MaskedTextBox, set the Text property of the MaskedTextBox provided by the MaskedTextBox class.

  // Setting the text
  m.Text = "GeeksforGeeks";
  

• Step 3: And last add this MaskedTextBox control to the form using the following statement:

  // Adding MaskedTextBox control on the form
  this.Controls.Add(m);
  

  Example: CSharp

  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 WindowsFormsApp38 {
  public partial class Form1 : Form {
      public Form1()
      {
          InitializeComponent();
      }
      private void Form1_Load(object sender, EventArgs e)
      {
          // Creating and setting the 
          // properties of the Label
          Label l1 = new Label();
          l1.Location = new Point(413, 98);
          l1.Size = new Size(176, 20);
          l1.Text = " Example";
          l1.Font = new Font("Bell MT", 12);
          // Adding label on the form
          this.Controls.Add(l1);
          // Creating and setting the 
          // properties of the Label
          Label l2 = new Label();
          l2.Location = new Point(242, 135);
          l2.Size = new Size(126, 20);
          l2.Text = "Phone number:";
          l2.Font = new Font("Bell MT", 12);
          // Adding label on the form
          this.Controls.Add(l2);
          // Creating and setting the 
          // properties of MaskedTextBox
          MaskedTextBox m = new MaskedTextBox();
          m.Location = new Point(374, 137);
          m.Text = "GeeksforGeeks";
          m.TextAlign = HorizontalAlignment.Right;
          m.Size = new Size(176, 20);
          m.Name = "MyBox";
          m.BorderStyle = BorderStyle.Fixed3D;
          m.BackColor = Color.LightBlue;
          m.ForeColor = Color.HotPink;
          m.Font = new Font("Bell MT", 18);
          // Adding MaskedTextBox
          // control on the form
          this.Controls.Add(m);
      }
  }
  }
  

  Output: