Remove all items in listbox c#

Clear all items in a ListBox : ListBox«GUI Windows Form«C# / C Sharp

1. C# / C Sharp
2. GUI Windows Form
3. ListBox

Clear all items in a ListBox

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form { private System.Windows.Forms.ListBox displayListBox; private System.Windows.Forms.TextBox inputTextBox; private System.Windows.Forms.Button addButton; private System.Windows.Forms.Button removeButton; private System.Windows.Forms.Button clearButton; public Form1[] { InitializeComponent[]; } private void addButton_Click[ object sender, EventArgs e ] { displayListBox.Items.Add[ inputTextBox.Text ]; inputTextBox.Clear[]; } private void removeButton_Click[ object sender, EventArgs e ] { if [ displayListBox.SelectedIndex != -1 ] displayListBox.Items.RemoveAt[ displayListBox.SelectedIndex ]; } private void clearButton_Click[ object sender, EventArgs e ] { displayListBox.Items.Clear[]; } private void InitializeComponent[] { this.displayListBox = new System.Windows.Forms.ListBox[]; this.inputTextBox = new System.Windows.Forms.TextBox[]; this.addButton = new System.Windows.Forms.Button[]; this.removeButton = new System.Windows.Forms.Button[]; this.clearButton = new System.Windows.Forms.Button[]; this.SuspendLayout[]; // // displayListBox // this.displayListBox.FormattingEnabled = true; this.displayListBox.Location = new System.Drawing.Point[13, 12]; this.displayListBox.Name = "displayListBox"; this.displayListBox.Size = new System.Drawing.Size[119, 238]; this.displayListBox.TabIndex = 0; // // inputTextBox // this.inputTextBox.Location = new System.Drawing.Point[149, 12]; this.inputTextBox.Name = "inputTextBox"; this.inputTextBox.Size = new System.Drawing.Size[100, 20]; this.inputTextBox.TabIndex = 1; // // addButton // this.addButton.Location = new System.Drawing.Point[149, 56]; this.addButton.Name = "addButton"; this.addButton.Size = new System.Drawing.Size[100, 36]; this.addButton.TabIndex = 2; this.addButton.Text = "Add"; this.addButton.Click += new System.EventHandler[this.addButton_Click]; // // removeButton // this.removeButton.Location = new System.Drawing.Point[149, 109]; this.removeButton.Name = "removeButton"; this.removeButton.Size = new System.Drawing.Size[100, 36]; this.removeButton.TabIndex = 3; this.removeButton.Text = "Remove"; this.removeButton.Click += new System.EventHandler[this.removeButton_Click]; // // clearButton // this.clearButton.Location = new System.Drawing.Point[149, 165]; this.clearButton.Name = "clearButton"; this.clearButton.Size = new System.Drawing.Size[100, 36]; this.clearButton.TabIndex = 4; this.clearButton.Text = "Clear"; this.clearButton.Click += new System.EventHandler[this.clearButton_Click]; // ListBoxTestForm // this.AutoScaleDimensions = new System.Drawing.SizeF[6F, 13F]; this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size[263, 268]; this.Controls.Add[this.clearButton]; this.Controls.Add[this.removeButton]; this.Controls.Add[this.addButton]; this.Controls.Add[this.inputTextBox]; this.Controls.Add[this.displayListBox]; this.Name = "ListBoxTestForm"; this.Text = "ListBoxTest"; this.ResumeLayout[false]; this.PerformLayout[]; } [STAThread] static void Main[] { Application.EnableVisualStyles[]; Application.Run[new Form1[]]; } }

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