Csharp/CSharp Tutorial/GUI Windows Forms/Drag Move

Drag and Drop Image

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class ImageDragDrop : System.Windows.Forms.Form {

 private System.ruponentModel.Container components = null;
 private bool  isDragging = false;
 private int   oldX, oldY;
 Rectangle dropRect = new Rectangle(100, 100, 150, 150);
 private PictureBox picBox = new PictureBox();
 public ImageDragDrop()
 {
   InitializeComponent();
   CenterToScreen();
   picBox.SizeMode = PictureBoxSizeMode.StretchImage;
   picBox.Location = new System.Drawing.Point(64, 32);
   picBox.Size = new System.Drawing.Size(50, 50);
   picBox.Image = new Bitmap("YourFile.bmp");
   picBox.MouseDown += new MouseEventHandler(picBox_MouseDown);
   picBox.MouseUp += new MouseEventHandler(picBox_MouseUp);
   picBox.MouseMove += new MouseEventHandler(picBox_MouseMove);
   picBox.Cursor = Cursors.Hand;
   Controls.Add(picBox);
 }
 protected override void Dispose( bool disposing )
 {
   picBox.Dispose();
   if( disposing )
   {
     if (components != null) 
     {
       components.Dispose();
     }
   }
   base.Dispose( disposing );
 }

 private void InitializeComponent()
 {
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(292, 273);
   this.Name = "ImageDragDrop";
   this.Text = "Dragging Images";
   this.Paint += new System.Windows.Forms.PaintEventHandler(this.ImageDragDrop_Paint);
 }
 [STAThread]
 static void Main() 
 {
   Application.Run(new ImageDragDrop());
 }
 private void picBox_MouseDown(object sender, MouseEventArgs e) 
 {
   isDragging = true;
   oldX = e.X;
   oldY = e.Y;
 }
 private void picBox_MouseMove(object sender, MouseEventArgs e) 
 {
   if (isDragging) 
   {
     picBox.Top = picBox.Top + (e.Y - oldY);
     picBox.Left = picBox.Left + (e.X - oldX);
   }
 }
 private void picBox_MouseUp(object sender, MouseEventArgs e) 
 {
   isDragging = false;
   if(dropRect.Contains(picBox.Bounds))
   {
     MessageBox.Show("Message", "In Rectangle");
   }
 }
 private void ImageDragDrop_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
 {
   Graphics g = e.Graphics;
   g.FillRectangle(Brushes.Purple, dropRect);
   g.DrawString("Drop Image Here..", new Font("Times New Roman", 25),Brushes.Yellow, dropRect);
 }

}</source>