Dear Group,
I am doing Drag and Drop function and see this problem
if I select 3 from listBox1 and drag to listBox2, the value in listBox1 is
not updated, even I move (or use up and down keyboard) to select number 4,
the selectedItem.ToString() still shows 3
Am i doing something wrong?
Here is the file
****
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace Controls
{
/// <summary>
/// Summary description for Dragdrop.
/// </summary>
public class Dragdrop : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox2;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.ListBox listBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Dragdrop()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(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.listBox2 = new System.Windows.Forms.ListBox();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.listBox1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// listBox2
//
this.listBox2.AllowDrop = true;
this.listBox2.Location = new System.Drawing.Point(232, 32);
this.listBox2.Name = "listBox2";
this.listBox2.Size = new System.Drawing.Size(112, 160);
this.listBox2.TabIndex = 1;
this.listBox2.DragDrop += new
System.Windows.Forms.DragEventHandler(this.listBox 2_DragDrop);
this.listBox2.DragEnter += new
System.Windows.Forms.DragEventHandler(this.listBox 2_DragEnter);
this.listBox2.SelectedIndexChanged += new
System.EventHandler(this.listBox2_SelectedIndexCha nged);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(136, 56);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(72, 20);
this.textBox1.TabIndex = 2;
this.textBox1.Text = "textBox1";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(136, 88);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(72, 20);
this.textBox2.TabIndex = 3;
this.textBox2.Text = "textBox2";
//
// listBox1
//
this.listBox1.Location = new System.Drawing.Point(8, 40);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 134);
this.listBox1.TabIndex = 4;
this.listBox1.MouseDown+=new MouseEventHandler(listBox1_MouseDown);
this.listBox1.SelectedIndexChanged +=new
EventHandler(listBox1_SelectedIndexChanged);
//
// Dragdrop
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(368, 214);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.listBox2);
this.Name = "Dragdrop";
this.Text = "Dragdrop";
this.Load += new System.EventHandler(this.Dragdrop_Load);
this.ResumeLayout(false);
}
#endregion
private void listBox2_SelectedIndexChanged(object sender, System.EventArgs
e)
{
}
private void listBox2_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(string)))
{e.Effect=DragDropEffects.Move ; }
else
{e.Effect=DragDropEffects.None;}
}
private void listBox2_DragDrop(object sender,DragEventArgs e)
{
listBox2.Items.Add((string)e.Data.GetData(typeof(s tring)));
}
private void Dragdrop_Load(object sender, System.EventArgs e)
{
this.listBox1.Items.Add("1");
this.listBox1.Items.Add("2");
this.listBox1.Items.Add("3");
this.listBox1.Items.Add("4");
}
private void listBox1_MouseDown(object sender,MouseEventArgs e)
{
try
{
textBox1.Text = listBox1.SelectedIndex.ToString();
textBox2.Text=listBox1.Items[listBox1.SelectedIndex].ToString();
DragDropEffects effect =
listBox1.DoDragDrop(listBox1.Items[listBox1.SelectedIndex].ToString(),DragDr
opEffects.Move);
if (effect ==DragDropEffects.Move)
{
listBox1.Items.RemoveAt(listBox1.SelectedIndex);
}
}
catch{};
}
private void listBox1_SelectedIndexChanged(object sender, System.EventArgs
e)
{
textBox1.Text = listBox1.SelectedItem.ToString();
}
//private void DoDragDrop(string
}
}
***
TIA
L.Peter