Array of Draggable Labels/objects (im half way ther) - help plz

I've done it myself, JOYOUS!!

did it different...

for those who are intrested here how...
(using array of labels, then using a method which checks if the mouse point is inside the rectangle of the label)

Array of Labels and Rectangles...
Label[] label = new Label[100];
Rectangle[] rects = new Rectangle[100];

for each label...
label[newLabel] = new System.Windows.Forms.Label();
label[newLabel].Location = new System.Drawing.Point(9, 200);
label[newLabel].Size = new System.Drawing.Size(50, 50);
label[newLabel].name = "fred"   ... etc for all label values

// create an associated rectangle (with the same points)
rects[newLabel] = new Rectangle(9, 200, 50, 50);


// IS point in label method...
/// Point to be Checked
/// Rectangle
/// true is Point is in rectangle, else false
public static bool isPointinLabel(Point p, Rectangle r)
{
bool flag = false;
if (p.X > r.X && p.X < (r.X + r.Width) && p.Y > r.Y && p.Y < (r.Y + r.Height))
{
flag = true;
}
return flag;
}

You need to distinguish between the name of the variable which holds a reference to a control and the Name property of the control. It's the latter we're interested in here and the easiest way to set it is in the Properties Box for the label at design time.

However, you can set it in code with code such as this;

Label lblDragger1 = new System.Windows.Forms.Label();
lblDragger1.Name = "lblDragger1";

I'd suggest something like this (untested) for dealing with 3 draggable labels though, as you'll see, the code is easily generalized to deal with an arbitrary number of such labels added at design time.

There's no need to put the labels themselves into an array as long as they are named consecutively (lblDragger1, lbdDragger2 etc):

// creating 3 draggablelabels

lblDragger1 = new System.Windows.Forms.Label();
lblDragger2 = new System.Windows.Forms.Label();
lblDragger3 = new System.Windows.Forms.Label();

// make sure name property is set

lblDragger1.Name = "lblDragger1";
lblDragger2.Name = "lblDragger2";
lblDragger3.Name = "lblDragger3";

// drag and drop event handlers - all labels use same handlers

lblDragger1.MouseUp += new MouseEventHandler(this.lblDragger_MouseUp);
lblDragger1.MouseMove += new MouseEventHandler(this.lblDragger_MouseMove);
lblDragger1.MouseDown += new MouseEventHandler(this.lblDragger_MouseDown);
lblDragger2.MouseUp += new MouseEventHandler(this.lblDragger_MouseUp);
lblDragger2.MouseMove += new MouseEventHandler(this.lblDragger_MouseMove);
lblDragger2.MouseDown += new MouseEventHandler(this.lblDragger_MouseDown);
lblDragger3.MouseUp += new MouseEventHandler(this.lblDragger_MouseUp);
lblDragger3.MouseMove += new MouseEventHandler(this.lblDragger_MouseMove);
lblDragger3.MouseDown += new MouseEventHandler(this.lblDragger_MouseDown);

// create array variables

bool[] isDragging = new bool[3];
int[] clickOffsetX = new int[3];
int[] clickOffsetY = new int[3];

// helper method to identify label

int GetLblDraggerNumber(object sender)
{
   string name = sender.Name;
   if (name.Length > 10 && name.Substring(0, 10) == "lblDragger")
     return int.Parse(name.Substring(10));
   else
     return 0;
}

// the dragging and dropping

private void lblDragger_MouseDown(Object sender, MouseEventArgs e)
{
   int lblNumber = GetLblDraggerNumber(sender);
   if (lblNumber > 0)
   {   
     // remember arrays are zero based
     lblNumber--;
     isDragging[lblNumber]= true;
     clickOffsetX[lblNumber] = e.X;
     clickOffsetY[lblNumber] = e.Y;
   }
}

private void lblDragger_MouseUp(Object sender, MouseEventArgs e)
{
   int lblNumber = GetLblDraggerNumber(sender);
   if (lblNumber > 0)
   {   
     isDragging[--lblNumber] = false;
     this.groupBox1.Controls.Add(sender);
   }
}

private void lblDragger_MouseMove(Object sender, MouseEventArgs e)
{
   int lblNumber = GetLblDraggerNumber(sender);
   if (lblNumber > 0)
   {
     if (isDragging[--lblNumber])
     {
        sender.Left = e.X + sender.Left - clickOffsetX;
        sender.Top = e.Y + sender.Top - clickOffsetY;
     }
   }
   Invalidate();
}