How to set the Text in TextBox 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 set the text associated with the TextBox by using the Text property of the TextBox. In Windows form, you can set this property in two different ways:

1. Design-Time: It is the simplest way to set the Text property of the TextBox as shown in the following steps:

• Step 1: Create a windows form.
  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 set the Text property of the TextBox.

  

  Output:
  

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

public override string Text { get; set; }

Here, the text is represented in the form of String. Following steps are used to set the Text 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 Text property of the TextBox provided by the TextBox class.

  // Set Text property
  Mytextbox.Text = "Enter City Name...";
  

• 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 = "City";
          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";
          Mytextbox.Text = "Enter City Name...";
  
          // Add this textbox to form
          this.Controls.Add(Mytextbox);
      }
  }
  }

  Output: