Currently I store X and Y using
Point[] points1 = new Point[] {
new Point { X = 262, Y = 321 },
new Point { X = 325, Y = 334 },
new Point { X = 278, Y = 387 }
};
how can I set variable 'points1' globally ? so I can using loop to pull the data X and Y.
Sample Code what I've tried
Point[] points1 = new Point[]{};
for(int i = 0 ; i <10 ;i ++)
{
points1 = new Point[] { new Point { X = i, Y = i++}};
}
but always get the last result instead of in array list.
Instead of creating a new array (which is of type Point[]) at each iteration, you should create a new array-element (which is of type Point) and put it into the array:
for(int i = 0; i < 10; i++)
{
points1[i] = new Point { X = i, Y = i++ };
}
Furthermore you are incrementing i twice, once in the for-loop-declaration and once when creating the new Point. Therefor you get the following values for your X- and Y-coords:
{ 0, 2, 4, 6, 8 }.
To create 10 points instead of only 5 you should omit one of those incrementations.
Anyway I would suggest to use a List<Point> instead, which is more dynamic as you can easily add and remove elements to it:
List<Point> points = new List<Point>();
points.Add(new Point(...));
points = new Point[10] before you can add data to the array.for(int i = 0 ; i <10 ;i ++)
{
points1 = new Point[] { new Point { X = i, Y = i++}};
}
doesn't set the value of each item in the array. It reassigns points1 to be a new array each iteration. Notice that points1 is being assigned, not an element of points1. To do this, you need to assign new Point values to points1[i] instead.
You can set the points for that array directly:
Point[] points1 = new Point[10];
for (int i = 0; i < 10; i++)
{
points1[i] = new Point { X = i, Y = i };
}
If you dont have a fixed number of point you have to use List instead of array. Here is an example:
List<Point> points1 = new List<Point>();
for (int i = 0; i < 10; i++) // can be any limit
{
points1.Add(new Point { X = i, Y = i++ });
}
// you can convert to array at any time
var points = points1.ToArray();
Console.WriteLine(points1);
List<Point> points1 = new List<Point>();
for (int i = 0; i < 10; i++)
{
points1.Add(new Point { X = i, Y = i++ });
}
itwice, once in the declaration of your loop and once atY = i++?