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How to set Text in ComboBox in C#?
  • Last Updated : 30 Jun, 2019

In Windows Forms, ComboBox provides two different features in a single control, it means ComboBox works as both TextBox and ListBox. In ComboBox, only one item is displayed at a time and the rest of the items are present in the drop-down menu. You are allowed to add text in your ComboBox by using the Text Property. You can set this property using two different methods:

1. Design-Time: It is the easiest method to set the text in the ComboBox control using 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 ComboBox control from the ToolBox and drop it on the windows form. You are allowed to place a ComboBox control anywhere on the windows form according to your need.
  • Step 3: After drag and drop you will go to the properties of the ComboBox control to set the text in the ComboBox.

    Output:

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

public override string Text { get; set; }

Here, the value of this property is of System.String type. Following steps are used to set the text in the ComboBox elements:

  • Step 1: Create a combobox using the ComboBox() constructor is provided by the ComboBox class.
    // Creating ComboBox using ComboBox class
    ComboBox mybox = new ComboBox();
    
  • Step 2: After creating ComboBox, set the text in the ComboBox elements.
    // Set text in the combobox
    mybox.Text = "Rohit";
    
  • Step 3: And last add this combobox control to form using Add() method.
    // Add this ComboBox to form
    this.Controls.Add(mybox);
    

    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 WindowsFormsApp14 {
      
    public partial class Form1 : Form {
      
        public Form1()
        {
            InitializeComponent();
        }
      
        private void Form1_Load(object sender, EventArgs e)
        {
            // Creating and setting the properties of label
            Label l = new Label();
            l.Location = new Point(222, 80);
            l.Size = new Size(99, 18);
            l.Text = "Enter name";
      
            // Adding this label to the form
            this.Controls.Add(l);
      
            // Creating and setting the properties of comboBox
            ComboBox mybox = new ComboBox();
            mybox.Location = new Point(327, 77);
            mybox.Size = new Size(216, 26);
            mybox.MaxLength = 3;
            mybox.Text = "Rohit";
      
            // Adding this ComboBox to the form
            this.Controls.Add(mybox);
        }
    }
    }

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    Output:




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