我已经在一个绘制点网格的程序上工作了几天，由于方法不好/复杂，我不得不重新开始几次。我现在已经到了必须在表单上从点击的点（点）到第二个点击的点（点）之间画一条线的地步。说真的，我一直在花费数小时甚至数天的时间寻找正确的方法。至于现在，我只能通过随机点击从表单上的一个点到表单上的另一个点画一条线......有人可以帮我完成代码，这让我很沮丧，我没有任何进展在所有尝试绘制点网格之后。所以我想要做的是“从点击的点（点）画一条线到表单上的第二个点击的点（点）”。
请参阅下面的我的代码：
Form1.cs：
public partial class Form1 : Form
{
private GridDrawing drawing;
private Point point1;
private Point point2;
List<Point> p1List = new List<Point>(); //Temp
List<Point> p2List = new List<Point>(); //Temp
//True if point1 must be updated
//False if point2 must be updated
private bool firstPoint = true;
private int sizeOfDot;
private int rows;
private int columns;
public Form1()
{
InitializeComponent();
sizeOfDot = 10; //The size of the dot
rows = 6; //The amount of rows for the matrix
columns = 8; //The amount of columns for the matrix
}
private void Form_Paint(object sender, PaintEventArgs e)
{
e.Graphics.FillRectangle(Brushes.White, ClientRectangle); //Fill the form in white
drawing = new GridDrawing(this, rows, columns); //Control, Rows, Columns
foreach (var piece in drawing.Pieces) //Draws all the dots
{
e.Graphics.FillEllipse(Brushes.Black, (piece.Dot.X - sizeOfDot / 2),
(piece.Dot.Y - sizeOfDot / 2), sizeOfDot, sizeOfDot); //Draws the dot
}
using (var pen = new Pen(Color.Black, 2))
{
for (int i = 0; i < p1List.Count; i++)
{
e.Graphics.DrawLine(pen, p1List[i], p2List[i]);
}
}
}
private void startToolStripMenuItem_Click(object sender, EventArgs e)
{}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (firstPoint) //Update point1 or point2
{
//Point 1
point1.X = e.X;
point1.Y = e.Y;
}
else
{
//Point 2
point2.X = e.X;
point2.Y = e.Y;
p1List.Add(point1);
p2List.Add(point2);
}
firstPoint = !firstPoint; //Change the bool value
Invalidate(); //Redraw
}
private void Form1_SizeChanged(object sender, EventArgs e)
{
Invalidate();
}
}
GridDrawing.cs：
public class GridDrawing
{
private int columns;
private int rows;
private List<GridPiece> pieces;
private Point dot;
//private Point point1; //point1 to start drawing line from
//private Point point2; //point2 to end drawing line from
/// <summary>
/// Constructs a grid
/// </summary>
/// <param name="ctrl"></param>
/// <param name="rows"></param>
/// <param name="columns"></param>
/// <param name="sizeOfDot"></param>
public GridDrawing(Control ctrl, int rows, int columns)
{
this.rows = rows; // The amount of rows in the matrix.
this.columns = columns; // The amount of columns in the matrix.
this.pieces = new List<GridPiece>(); // Initializes the List GridPieces
int xOffset = (int)ctrl.ClientRectangle.Width / (columns + 1); // FP offset for X
int yOffset = (int)ctrl.ClientRectangle.Height / (rows + 1); // FP offset for Y
//Generate the dots
for (int i = 0; i < rows; i++) //Matrix with 6 rows
{
for (int j = 0; j < columns; j++) //Matrix with 8 columns
{
dot = new Point((j + 1) * xOffset, (i + 1) * yOffset); // Center of the dot
GridPiece p = new GridPiece(dot); // Creates a piece
pieces.Add(p); // Puts the piece that has to be drawn in the List<GridPiece>pieces
}
}
}
public List<GridPiece> Pieces //Property List<GridPiece>pieces
{
get { return this.pieces; }
}
public Point Dot //Property Point dot
{
get { return this.dot; }
}
}
GridPiece.cs：
public class GridPiece
{
private Point dot;
/// <summary>
/// Constructor of GriedPiece
/// </summary>
/// <param name="bmpPic"></param>
/// <param name="position"></param>
public GridPiece(Point dot)
{
this.dot = dot;
}
public Point Dot
{
get { return dot; }
}
}
这是一个例子，我试图让它看起来像
有人可以帮我吗？