}
private void Form1_MouseDown(object sender, MouseEventArgs e) {
this.CanMove = true; startpt.X = e.X; startpt.Y = e.Y;
}
private void Form1_MouseMove(object sender, MouseEventArgs e) {
if(this.CanMove==true) {
Graphics g = this.CreateGraphics(); endpt.X = e.X; endpt.Y = e.Y;
g.DrawLine(new Pen(Color.Red, 1), startpt, endpt); startpt = endpt; } }
private void Form1_MouseUp(object sender, MouseEventArgs e) {
Graphics g = this.CreateGraphics();
g.DrawLine(new Pen(Color.Red,1),this.startpt,new Point(e.X,e.Y)); this.CanMove=false; }
} }
Using 命令 （画点，画线） using System.IO;
using System.Runtime.Serialization; //系列1
using System.Runtime.Serialization.Formatters.Binary;//系列2 using System.Drawing.Drawing2D;
namespace _024xubao {
public partial class Form1 : Form {
AdjMGraph G = new AdjMGraph(); int flag;
int n1, n2;//选 中的起点，选中的终点 const double alfa = 10; int index = -1;
const int Stone = 88888888;//无穷大
public MemoryStream fs2;
public BinaryFormatter formatter; public int sizeofnode = 0; public byte[] buffer;
public Form1() {
InitializeComponent(); }
public int FindPoint(int x, int y) {
//选择点，选中则返回该点的下标，否则返回-1 double d; int i, n;
n = G.Vertices.Count; for (i = 0; i < n; i++) {
Node ob = G.Vertices[i];
d = (x - ob.x) * (x - ob.x) + (y - ob.y) * (y - ob.y); d = Math.Sqrt(d);
if (d < alfa) return i; }
return -1; }
private void 打开ToolStripMenuItem_Click(object sender, EventArgs e) {
OpenFileDialog dlg = new OpenFileDialog();
if (dlg.ShowDialog() != DialogResult.OK) return;
FileStream fs = new FileStream(dlg.FileName, FileMode.Open); BinaryReader reader = new BinaryReader(fs); int n = 0;
G.Vertices.Clear(); Node ob; int i, j;
n = reader.ReadInt32(); for (i = 0; i < n; i++) {
reader.Read(buffer, 0, sizeofnode); fs2 = new MemoryStream(buffer);
ob = (Node)formatter.Deserialize(fs2); G.Vertices.Add(ob); }
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++) {
G.edge[i, j] = reader.ReadInt32(); } }
reader.Close(); fs.Close();
//slb3.Text = \
Invalidate();//调用paint中重绘 }
private void 保存ToolStripMenuItem_Click(object sender, EventArgs e) {
SaveFileDialog dlg = new SaveFileDialog();
if (dlg.ShowDialog() != DialogResult.OK) return;
FileStream fs = new FileStream(dlg.FileName, FileMode.Create); BinaryWriter writer = new BinaryWriter(fs); int n = G.Vertices.Count;// Node ob; int i, j;
writer.Write(n);
for (i = 0; i < n; i++) {
ob = (Node)G.Vertices[i]; fs2 = new MemoryStream();
formatter.Serialize(fs2, ob); buffer = fs2.ToArray();
writer.Write(buffer, 0, sizeofnode); }
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++) {
writer.Write(G.edge[i, j]); } }
writer.Close(); fs.Close(); }
private void 退出ToolStripMenuItem_Click(object sender, EventArgs e) {
DialogResult a = MessageBox.Show(\是否要退出本程序\, \系统提示\, MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (Convert.ToString(a) == \) {
Application.Exit(); } }
private void 清除ToolStripMenuItem_Click(object sender, EventArgs e) {
flag = 0; //初始化图 int i, j;
G.Vertices = new List
for (i = 0; i < 100; i++) {
for (j = 0; j < 100; j++) {
G.edge[i, j] = Stone; } }
//获得node对象的系列化字节数 fs2 = new MemoryStream(); Node ob = new Node();
formatter = new BinaryFormatter();
formatter.Serialize(fs2, ob); buffer = fs2.ToArray();
sizeofnode = buffer.Length; fs2.Close();
Invalidate();//调用paint中重绘 }
private void 移动ToolStripMenuItem_Click(object sender, EventArgs e) {
flag = 3;
//SLabl.Text = \当前操作：移动\ }
private void 画线ToolStripMenuItem_Click(object sender, EventArgs e) {
flag = 2;
//SLabl.Text = \当前操作：画线\ }
private void 画点ToolStripMenuItem_Click(object sender, EventArgs e) {
flag = 1;
//SLabl.Text = \当前操作：画点\ }
private void Form1_Load_1(object sender, EventArgs e) {
flag = 0; //初始化图 int i, j;
G.Vertices = new List
for (i = 0; i < 100; i++) {
for (j = 0; j < 100; j++) {
G.edge[i, j] = Stone; } }
fs2 = new MemoryStream(); Node ob = new Node();
formatter = new BinaryFormatter(); formatter.Serialize(fs2, ob); buffer = fs2.ToArray();
sizeofnode = buffer.Length; fs2.Close(); }
private void Form1_MouseDown_1(object sender, MouseEventArgs e) {
if (flag == 1)
{
int n = G.Vertices.Count; Node ob = new Node(); ob.c = Color.Black; ob.ID = n + 1;
string str = \ + ob.ID + \; ob.Name = str.Substring(0, 10); ob.w = 2;
ob.x = e.X; ob.y = e.Y; G.Vertices.Add(ob);
//SLabl1.Text = \ Pen pen = new Pen(ob.c, ob.w);
Graphics g = this.CreateGraphics(); g.DrawEllipse(pen, ob.x, ob.y, 8, 8);
g.DrawString(ob.Name, new Font(\宋体\, 15), Brushes.Blue, new Point(ob.x + 5, ob.y));
}
if (flag == 2) //选起点 {
n1 = FindPoint(e.X, e.Y);
//SLabl3.Text = n1.ToString(); }
if (flag == 3) {
index = FindPoint(e.X, e.Y); //SLabl3.Text = n1.ToString(); } }
private void Form1_MouseUp_1(object sender, MouseEventArgs e) {
double d;
if (flag == 2)//选终点 {
n2 = FindPoint(e.X, e.Y);
//SLabl2.Text = n2.ToString(); if (n1 >= 0 && n2 >= 0) {
//插入边
Node ob1 = G.Vertices[n1]; Node ob2 = G.Vertices[n2];
d = (ob2.x - ob1.x) * (ob2.x - ob1.x) + (ob2.y - ob1.y) * (ob2.y - ob1.y); d = Math.Sqrt(d);
G.edge[n1, n2] = (int)d;//边长 G.numOfEdges++;
Graphics g = this.CreateGraphics(); Pen pen = new Pen(Color.Red, 4);
g.DrawLine(pen, new Point(ob1.x, ob1.y), new Point(ob2.x, ob2.y));
//SLabl4.Text = \ } }
if (flag == 3 && index >= 0)//移动 {
Node ob2 = new Node(); ob2 = G.Vertices[n1];