Mega Code Archive

 

Categories / C# / GUI Windows Form

 

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());     } }