How to display textbox Data in to listview with particular index in winform C#?

Question

Displaying text box data into list view control with particular index on button click

if (lvone.SelectedItems != null) {
  ListViewItem item = lvone.SelectedItems[0];
  item.SubItems[1].Text = textboxone.Text;
}

Answer 1

I think I got what it is you are asking for. The secret is that you need a column for each SubItem you want to display.

• Copy/Paste the code below
• Run it
• Enter "key0" in the textbox, hit Enter
• Try the same key again, or try other ones...

I suggest you change the title of your question to something like How to display SubItems in ListView so that it is more representative of what it is you are asking.

using System;
using System.Drawing;
using System.Windows.Forms;

namespace ListViewSubItems
{
    public partial class Form1 : Form
    {

        TextBox txtbx = new TextBox();//this will be the textbox in which the user will type something
        ListView lv = new ListView();//this will be our listview
        Button btn = new Button();//this will be our button
        Button btnChange = new Button();
        public Form1()
        {
            InitializeComponent();
            InitializeOurStuff();
            AddInitalEntriesAgain();
        }

        /// <summary>
        /// this is where the magic happens
        /// </summary>
        private void AddSubItems()
        {
            if (string.IsNullOrEmpty(txtbx.Text))
            {
                //nothing to do
                return;
            }

            /*
             * You can add SubItems all you want. 
             * But you'll never see them unless you have column
             * foreach of the SubItem you whish to show
             * To do so, you need to keep track of 
             * how many SubItems are listed per row,
             * so that you append the SubItem to the right column,
             * and so that you add a column only when needed
             */


            if (lv.Items.ContainsKey(txtbx.Text))
            {
                lv.Items[txtbx.Text].SubItems.Add("coolbeans");
                lv.Items[txtbx.Text].SubItems.Add("COOLBEANS");

                /*
                 * Again, if you don't have a column to host
                 * your SubItem, then your SubItem will simply not show up
                 * Having said that, now add as many columns as you need
                 */
                while ((lv.Columns.Count) < lv.Items[txtbx.Text].SubItems.Count)
                {
                    lv.Columns.Add("subcol" + lv.Columns.Count);
                }
            }
        }

        /// <summary>
        /// In this method, we simply update a SubItem
        /// </summary>
        private void UpdateTheSubItem()
        {
            if (lv.Items.ContainsKey(txtbx.Text))
            {
                if (lv.Items[txtbx.Text].SubItems.Count > 1)
                {
                    lv.Items[txtbx.Text].SubItems[1].Text = "you just got replaced! " + txtbx.Text;
                }
            }
        }

        /// <summary>
        /// For the purpose of this snippet
        /// Everything on the form is created in here
        /// NOTHING created using Designer
        /// </summary>
        private void InitializeOurStuff()
        {
            //set some textbox properties
            txtbx.Location = new Point(5, 5);
            txtbx.KeyUp += Txtbx_KeyUp;

            //set some ListView properties
            lv.Location = new Point(txtbx.Location.X, txtbx.Location.Y + txtbx.Height + 5);
            lv.HideSelection = false;
            lv.View = View.Details;
            lv.Width = this.Width - 20;

            //set some button properties
            btn.Location = new Point(lv.Location.X, lv.Location.Y + lv.Height + 5);
            btn.Text = "Add SubItms";
            btn.Click += Btn_Click;

            btnChange.Location = new Point(btn.Location.X + btn.Width + 5, btn.Location.Y);
            btnChange.Text = "Change SubItm";
            btnChange.Click += BtnChange_Click;

            //add the controls to the forms
            this.Controls.Add(txtbx);
            this.Controls.Add(lv);
            this.Controls.Add(btn);
            this.Controls.Add(btnChange);
        }

        private void BtnChange_Click(object sender, EventArgs e)
        {
            UpdateTheSubItem();
        }

        /// <summary>
        /// keyboard navigation for keyboard junkies
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Txtbx_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                Btn_Click(null, null);
            }
            else if (e.KeyCode == Keys.Q && e.Modifiers == Keys.Control)
            {
                this.Close();
            }
        }

        /// <summary>
        /// I assume you have your own way of populating the listview
        /// though don't forget to add the initial column
        /// </summary>
        private void AddInitalEntriesAgain()
        {
            lv.Columns.Add("maincol");
            for (int i = 0; i < 5; i++)
            {
                lv.Items.Add("key" + i, "value" + i, null);
            }
        }

        /// <summary>
        /// the button click event
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Btn_Click(object sender, EventArgs e)
        {
            AddSubItems();
        }
    }
}