C# listBox undo button

Question

ok, I have a listBox where I can type something in a textBox and add it to the listBox.
But when I have added it, how do I make a undo button?
And one more question. if i type something new, it starts on a new line. is it possible to avoid that in any way?

Vulpes · Answer

To remove the last element added, whether selected or not: private void btnundo_Click(object sender, EventArgs e) { if (listBox1.Items.Count > 0) { listBox1.Items.RemoveAt(listBox1.Items.Count - 1); } }

David · Answer

ok, thanks it worked, but everytime I use the undo button, I have to select the sentence. is it any way to remove the last thing added?

Satyapriya Nayak · Answer

Hi David, Try this... using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication3 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void btnadd_Click(object sender, EventArgs e) { listBox1.SelectedIndex = listBox1.Items.Add(textBox1.Text); textBox1.Clear(); } private void btnundo_Click(object sender, EventArgs e) { if (listBox1.SelectedIndices.Count > 0) { for (int i = listBox1.SelectedIndices.Count - 1; i >= 0; i--) { listBox1.Items.RemoveAt(listBox1.SelectedIndices[i]); } } } } } Thanks If this post helps you mark it as answer

C# listBox undo button

Answers (3)