C# | TextBox Controls - GeeksforGeeks

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. The TextBox is a class and it is defined under System.Windows.Forms namespace. In C#, you can create a TextBox in two different ways:

1. Design-Time: It is the simplest way to create a 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 can place TextBox 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 modify the TextBox design according to your requirement.

2. Run-Time: It is a little bit trickier than the above method. In this method, you can create your own textbox using the TextBox class.

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 properties of the TextBox provided by the TextBox class.

 
// Set location of the textbox
Mytextbox.Location = new Point(187, 51);

// Set background color of the textbox
Mytextbox.BackColor = Color.LightGray;

// Set the foreground color of the textbox
Mytextbox.ForeColor = Color.DarkOliveGreen;

// Set the size of the textbox
Mytextbox.AutoSize = true;

// Set the name of the textbox
Mytextbox.Name = "text_box1";

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

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

Example:

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.ForeColor = Color.DarkOliveGreen; 
        Mytextbox.AutoSize = true; 
        Mytextbox.Name = "text_box1"; 
  
        // Add this textbox to form 
        this.Controls.Add(Mytextbox); 
    } 
} 
} 

Output:

Important properties of TextBox

Property	Description
AcceptsReturn	This property is used to set a value which shows whether pressing ENTER in a multiline TextBox control creates a new line of text in the control or activates the default button for the given form.
AutoSize	This property is used to adjust the size of the TextBox according to the content.
BackColor	This property is used to set the background color of the TextBox.
BorderStyle	This property is used to adjust the border type of the textbox.
CharacterCasing	This property is used to check whether the TextBox control modifies the case of characters as they are typed.
Events	This property is used to provide a list of event handlers that are attached to this Component.
Font	This property is used to adjust the font of the text displayed by the textbox control.
ForeColor	This property is used to adjust the foreground color of the textbox control.
Location	This property is used to adjust the coordinates of the upper-left corner of the textbox control relative to the upper-left corner of its form.
Margin	This property is used to set the margin between two textbox controls.
MaxLength	This property is used to set the maximum number of characters the user can type or paste into the text box control.
Multiline	This property is used to set a value which shows whether this is a multiline TextBox control.
Name	This property is used to provide a name to the TextBox control.
PasswordChar	This property is used to set the character used to mask characters of a password in a single-line TextBox control.
ScrollBars	This property is used to set which scroll bars should appear in a multiline TextBox control.
Text	This property is used to set the text associated with this control.
TextAlign	This property is used to adjust the alignment of the text in the TextBox control.
TextLength	This property is used to get the length of the text in the TextBox control.
UseSystemPasswordChar	This property is used to set a value which shows whether the text in the TextBox control should appear as the default password character.
Visible	This property is used to get or set a value which determine whether the control and all its child controls are displayed.

My Personal Notes

Jul	AUG	Sep
	11
2019	2020	2021

Important properties of TextBox

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