How to change the TextBox Border Style in C#?

In Windows forms, TextBox plays an important role. With the help of TextBox, the user can enter data in the application, it can be of a single line or of multiple lines. In TextBox, you are allowed to style the border of the TextBox control with the help of BorderStyle property which makes your textbox more attractive. The default value of this property is Fixed3D. In Windows form, you can set this property in two different ways: 1. Design-Time: It is the simplest way to set the BorderStyle property of the TextBox 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: Drag the TextBox control from the ToolBox and drop it on the windows form. You are allowed to place a TextBox control anywhere on the windows form according to your need.
• Step 3: After drag and drop you will go to the properties of the TextBox control to set the BorderStyle property of the TextBox. Output:

2. Run-Time: It is a little bit trickier than the above method. In this method, you can set the BorderStyle property of the TextBox programmatically with the help of given syntax:

public System.Windows.Forms.BorderStyle BorderStyle { get; set; }

Here, BorderStyle is used to represent the border type of TextBox control. And it will throw an InvalidEnumArgumentException if the value of the assigned to the property is not within the range of valid values for the enumeration. Following steps are used to set the BorderStyle property of the TextBox:

• Step 1 : Create a textbox using the TextBox() constructor provided by the TextBox class.

// Creating textbox
TextBox Mytextbox = new TextBox();

• Step 2 : After creating TextBox, set the BorderStyle property of the TextBox provided by the TextBox class.

// Set BorderStyle property
Mytextbox.BorderStyle = BorderStyle.FixedSingle;

• Step 3 : And last add this textbox control to form using Add() method.

// Add this textbox to form
this.Controls.Add(Mytextbox);

• 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 my {

public partial class Form1 : Form {

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        // Creating and setting the properties of Lable1
        Label Mylablel = new Label();
        Mylablel.Location = new Point(96, 54);
        Mylablel.Text = "Enter Name";
        Mylablel.AutoSize = true;
        Mylablel.BackColor = Color.LightGray;

        // Add this label to form
        this.Controls.Add(Mylablel);

        // Creating and setting the properties of TextBox1
        TextBox Mytextbox = new TextBox();
        Mytextbox.Location = new Point(187, 51);
        Mytextbox.BackColor = Color.LightGray;
        Mytextbox.AutoSize = true;
        Mytextbox.Name = "text_box1";
        Mytextbox.BorderStyle = BorderStyle.FixedSingle;

        // Add this textbox to form
        this.Controls.Add(Mytextbox);
    }
}
}

• Output: