I am trying to access items from a listbox that is in a form called Form1 in ano
ID: 3902203 • Letter: I
Question
I am trying to access items from a listbox that is in a form called Form1 in another form called Form2. Does anybody know how to do this? Here is what I have so far:
Form 1:
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 WindowsFormsApp2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string Options;
public void radioButton1_CheckedChanged(object sender, EventArgs e)
{
Options = "Hamburger";
}
public void radioButton2_CheckedChanged(object sender, EventArgs e)
{
Options = "Chicken Fingers";
}
public void radioButton3_CheckedChanged(object sender, EventArgs e)
{
Options = "Medium Fries";
}
public void radioButton4_CheckedChanged(object sender, EventArgs e)
{
Options = "Large Fries";
}
public void radioButton5_CheckedChanged(object sender, EventArgs e)
{
Options = "Pizza";
}
public void radioButton6_CheckedChanged(object sender, EventArgs e)
{
Options = "Cheeseburger";
}
public void button3_Click(object sender, EventArgs e)
{
lb_mycart.Items.Add(Options);
}
public void button1_Click(object sender, EventArgs e)
{
lb_mycart.Items.Clear();
}
public void button2_Click(object sender, EventArgs e)
{
Form2 main = new Form2();
main.Show();
}
public void lb_mycart_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
}
[Designer]
namespace WindowsFormsApp2
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.radioButton6 = new System.Windows.Forms.RadioButton();
this.radioButton5 = new System.Windows.Forms.RadioButton();
this.radioButton4 = new System.Windows.Forms.RadioButton();
this.radioButton3 = new System.Windows.Forms.RadioButton();
this.radioButton2 = new System.Windows.Forms.RadioButton();
this.radioButton1 = new System.Windows.Forms.RadioButton();
this.lb_mycart = new System.Windows.Forms.ListBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.button3 = new System.Windows.Forms.Button();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// groupBox1
//
this.groupBox1.Controls.Add(this.radioButton6);
this.groupBox1.Controls.Add(this.radioButton5);
this.groupBox1.Controls.Add(this.radioButton4);
this.groupBox1.Controls.Add(this.radioButton3);
this.groupBox1.Controls.Add(this.radioButton2);
this.groupBox1.Controls.Add(this.radioButton1);
this.groupBox1.Location = new System.Drawing.Point(38, 46);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(274, 288);
this.groupBox1.TabIndex = 0;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "Menu";
//
// radioButton6
//
this.radioButton6.AutoSize = true;
this.radioButton6.Location = new System.Drawing.Point(26, 222);
this.radioButton6.Name = "radioButton6";
this.radioButton6.Size = new System.Drawing.Size(119, 21);
this.radioButton6.TabIndex = 5;
this.radioButton6.TabStop = true;
this.radioButton6.Text = "Cheeseburger";
this.radioButton6.UseVisualStyleBackColor = true;
this.radioButton6.CheckedChanged += new System.EventHandler(this.radioButton6_CheckedChanged);
//
// radioButton5
//
this.radioButton5.AutoSize = true;
this.radioButton5.Location = new System.Drawing.Point(26, 185);
this.radioButton5.Name = "radioButton5";
this.radioButton5.Size = new System.Drawing.Size(63, 21);
this.radioButton5.TabIndex = 4;
this.radioButton5.TabStop = true;
this.radioButton5.Text = "Pizza";
this.radioButton5.UseVisualStyleBackColor = true;
this.radioButton5.CheckedChanged += new System.EventHandler(this.radioButton5_CheckedChanged);
//
// radioButton4
//
this.radioButton4.AutoSize = true;
this.radioButton4.Location = new System.Drawing.Point(49, 147);
this.radioButton4.Name = "radioButton4";
this.radioButton4.Size = new System.Drawing.Size(101, 21);
this.radioButton4.TabIndex = 3;
this.radioButton4.TabStop = true;
this.radioButton4.Text = "Large Fries";
this.radioButton4.UseVisualStyleBackColor = true;
this.radioButton4.CheckedChanged += new System.EventHandler(this.radioButton4_CheckedChanged);
//
// radioButton3
//
this.radioButton3.AutoSize = true;
this.radioButton3.Location = new System.Drawing.Point(49, 111);
this.radioButton3.Name = "radioButton3";
this.radioButton3.Size = new System.Drawing.Size(113, 21);
this.radioButton3.TabIndex = 2;
this.radioButton3.TabStop = true;
this.radioButton3.Text = "Medium Fries";
this.radioButton3.UseVisualStyleBackColor = true;
this.radioButton3.CheckedChanged += new System.EventHandler(this.radioButton3_CheckedChanged);
//
// radioButton2
//
this.radioButton2.AutoSize = true;
this.radioButton2.Location = new System.Drawing.Point(26, 73);
this.radioButton2.Name = "radioButton2";
this.radioButton2.Size = new System.Drawing.Size(130, 21);
this.radioButton2.TabIndex = 1;
this.radioButton2.TabStop = true;
this.radioButton2.Text = "Chicken Fingers";
this.radioButton2.UseVisualStyleBackColor = true;
this.radioButton2.CheckedChanged += new System.EventHandler(this.radioButton2_CheckedChanged);
//
// radioButton1
//
this.radioButton1.AutoSize = true;
this.radioButton1.Location = new System.Drawing.Point(26, 36);
this.radioButton1.Name = "radioButton1";
this.radioButton1.Size = new System.Drawing.Size(100, 21);
this.radioButton1.TabIndex = 0;
this.radioButton1.TabStop = true;
this.radioButton1.Text = "Hamburger";
this.radioButton1.UseVisualStyleBackColor = true;
this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButton1_CheckedChanged);
//
// lb_mycart
//
this.lb_mycart.FormattingEnabled = true;
this.lb_mycart.ItemHeight = 16;
this.lb_mycart.Location = new System.Drawing.Point(369, 88);
this.lb_mycart.Name = "lb_mycart";
this.lb_mycart.Size = new System.Drawing.Size(211, 244);
this.lb_mycart.TabIndex = 1;
this.lb_mycart.SelectedIndexChanged += new System.EventHandler(this.lb_mycart_SelectedIndexChanged);
//
// button1
//
this.button1.Font = new System.Drawing.Font("Microsoft Sans Serif", 7.8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.button1.ForeColor = System.Drawing.Color.Blue;
this.button1.Location = new System.Drawing.Point(369, 367);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 37);
this.button1.TabIndex = 2;
this.button1.Text = "Reset";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Font = new System.Drawing.Font("Microsoft Sans Serif", 7.8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.button2.Location = new System.Drawing.Point(505, 367);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 38);
this.button2.TabIndex = 3;
this.button2.Text = "Order";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// label1
//
this.label1.AutoSize = true;
this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label1.Location = new System.Drawing.Point(369, 46);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(63, 17);
this.label1.TabIndex = 4;
this.label1.Text = "My Cart";
//
// button3
//
this.button3.Font = new System.Drawing.Font("Microsoft Sans Serif", 7.8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.button3.Location = new System.Drawing.Point(38, 368);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(107, 37);
this.button3.TabIndex = 5;
this.button3.Text = "Add to Cart";
this.button3.UseVisualStyleBackColor = true;
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Controls.Add(this.button3);
this.Controls.Add(this.label1);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.lb_mycart);
this.Controls.Add(this.groupBox1);
this.Name = "Form1";
this.Text = "Order Form";
this.groupBox1.ResumeLayout(false);
this.groupBox1.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.RadioButton radioButton6;
private System.Windows.Forms.RadioButton radioButton5;
private System.Windows.Forms.RadioButton radioButton4;
private System.Windows.Forms.RadioButton radioButton3;
private System.Windows.Forms.RadioButton radioButton2;
private System.Windows.Forms.RadioButton radioButton1;
private System.Windows.Forms.ListBox lb_mycart;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button3;
}
}
Form 2:
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 WindowsFormsApp2
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
}
[Designer]
namespace WindowsFormsApp2
{
partial class Form2
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.FormattingEnabled = true;
this.listBox1.ItemHeight = 16;
this.listBox1.Location = new System.Drawing.Point(49, 63);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(280, 244);
this.listBox1.TabIndex = 0;
this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(49, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(92, 17);
this.label1.TabIndex = 1;
this.label1.Text = "Order Details";
//
// Form2
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(380, 366);
this.Controls.Add(this.label1);
this.Controls.Add(this.listBox1);
this.Name = "Form2";
this.Text = "Form2";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Label label1;
}
}
This was done using Windows Forms App in C#.
Explanation / Answer
In the method of form 2 where we want to add strings to Listbox we can invoke this public method by calling
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