c#的一个文件传输机制

10.17using System.IO;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button2_Click(object sender, EventArgs e){StreamWriter sw = new StreamWriter("c:\\1.txt", false);sw.Write(richTextBox1.Text);sw.Flush();sw.Close();}private void button1_Click(object sender, EventArgs e){StreamReader sr = new StreamReader("c:\\1.txt");richTextBox1.Clear();while (!sr.EndOfStream){richTextBox1.Text += sr.ReadLine()+"\n";}sr.Close();}}}using System.IO;namespace播放器{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){if (openFileDialog1.ShowDialog() == DialogResult.OK){for (int i = 0; i < openFileDialog1.FileNames.Length ; i++){listBox1.Items.Add(openFileDialog1.FileNames[i].ToString ());}}}private void button2_Click(object sender, EventArgs e){axWindowsMediaPlayer1.URL = listBox1.SelectedItem.ToString();}private void Form1_FormClosing(object sender, FormClosingEventArgs e){StreamWriter sw = new StreamWriter("c:\\1.lst");for (int i = 0; i < listBox1.Items.Count; i++){sw.WriteLine(listBox1.Items[i].ToString());}sw.Flush();sw.Close();}private void Form1_Load(object sender, EventArgs e){StreamReader sr = new StreamReader("c:\\1.lst");while (!sr.EndOfStream){listBox1.Items.Add(sr.ReadLine());}sr.Close();}}}using System.IO;namespace FileStreamRW{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){SaveFileDialog sf = new SaveFileDialog();sf.Filter = "txt文件|*.txt|所有文件|*.*";sf.AddExtension = true;sf.Title = "写文件";if (radioButton1.Checked){if (sf.ShowDialog() == DialogResult.OK){FileStream fs = new FileStream(sf.FileName, FileMode.Create);byte[] data = new UTF8Encoding().GetBytes(this.textBox1.Text);fs.Write(data, 0, data.Length);fs.Flush();fs.Close();}}if (radioButton2.Checked){if (sf.ShowDialog() == DialogResult.OK){FileStream fs = new FileStream(sf.FileName, FileMode.Create);StreamWriter sw = new StreamWriter(fs);sw.Write(this.textBox1.Text);sw.Flush();sw.Close();fs.Close();}}else{if (sf.ShowDialog() == DialogResult.OK){FileStream fs = new FileStream(sf.FileName, FileMode.Create);BinaryWriter bw = new BinaryWriter(fs);bw.Write(this.textBox1.Text);bw.Flush();bw.Close();fs.Close();}}}}}using System.Data.SqlClient;namespace ScoreMIS{public partial class Form1 : Form{string strCon;SqlConnection sqlCon;public Form1(){InitializeComponent();}/private void DBConnect(){strCon="server='YGFIBM20081126\\SQLEXPRESS';database='ScoreMIS';uid='sa';pwd='dbpwd';";sqlCon = new SqlConnection(strCon);}private void ComonDataView(){try{DBConnect();SqlDataAdapter da = new SqlDataAdapter("select ID as 学号," + "name as 姓名,class as 班级from students", sqlCon);DataSet ds = new DataSet();da.Fill(ds, "tablename");dataGridView1.DataSource = ds.Tables[0];cbID.DisplayMember = "学号";cbID.ValueMember = "学号";cbID.DataSource = ds.Tables[0].DefaultView;}catch (SystemException ex){MessageBox.Show("错误："+ ex.Message, "错误提示",MessageBoxButtons.OKCancel, rmation);}finally{if (sqlCon.State==ConnectionState.Open){sqlCon.Close();sqlCon.Dispose();}}}private void Form1_Load(object sender, EventArgs e){ComonDataView();}private void btnAdd_Click(object sender, EventArgs e){DBConnect();sqlCon.Open();SqlCommand cmd = new SqlCommand("insert into students values ('"+ cbID.Text + "','"+ tbName.Text + "','" + tbClass.Text + "')", sqlCon);cmd.ExecuteNonQuery();sqlCon.Close();ComonDataView();}private void btnDelete_Click(object sender, EventArgs e){DBConnect();sqlCon.Open();SqlCommand cmd = new SqlCommand("delete from students where ID = '" + cbID.Text + "'", sqlCon);cmd.ExecuteNonQuery();sqlCon.Close();ComonDataView();}private void btnUpdate_Click(object sender, EventArgs e){DBConnect();sqlCon.Open();SqlCommand cmd = new SqlCommand("UPDATE students SET name = '"+ tbName.Text + "',class = '" + tbClass.Text + "' WHERE ID='" + cbID.Text + "'", sqlCon);cmd.ExecuteNonQuery();sqlCon.Close();ComonDataView();}private void btnQuery_Click(object sender, EventArgs e){DBConnect();sqlCon.Open();SqlDataAdapter da = new SqlDataAdapter("select ID as 学号,"+ "name as 姓名,class as 班级from students WHERE ID like '%" + cbID.Text + "%'", sqlCon);DataSet ds = new DataSet();da.Fill(ds, "tablename");dataGridView1.DataSource = ds.Tables[0];sqlCon.Close();}}}using System.Data.SqlClient;namespace ScoreMIS{public partial class Form1 : Form{SqlConnection sqlCon;SqlDataAdapter sda;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){sqlCon=new SqlConnection("server='YGFIBM20081126\\SQLEXPRESS';database='ScoreMIS';uid='sa';pwd='dbp wd';");sda = new SqlDataAdapter("select ID as 学号," +"name as 姓名,class as 班级from students", sqlCon);DataSet ds = new DataSet();sda.Fill(ds);dataGridView1.DataSource = ds.Tables[0];cbID.DisplayMember = "学号";cbID.ValueMember = "学号";cbID.DataSource = ds.Tables[0].DefaultView;}private Boolean dbUpdate(){string strSql = "select ID as 学号," + "name as 姓名,class as 班级from students";DataTable dtUpdate = new DataTable();sda = new SqlDataAdapter(strSql, sqlCon);sda.Fill(dtUpdate);dtUpdate.Rows.Clear();DataTable dtShow = new DataTable();dtShow = (DataTable)dataGridView1.DataSource;for (int i = 0; i < dtShow.Rows.Count; i++){dtUpdate.ImportRow(dtShow.Rows[i]);}try{this.sqlCon.Open();SqlCommandBuilder CommandBuiler;CommandBuiler = new SqlCommandBuilder(sda);sda.Update(dtUpdate);sqlCon.Close();}catch (Exception ex){MessageBox.Show("数据库操作失败：" + ex.Message.ToString(), "提示",MessageBoxButtons.OK, MessageBoxIcon.Exclamation);return false;}dtUpdate.AcceptChanges();return true;}private void btnSort_Click(object sender, EventArgs e){sqlCon=new SqlConnection("server='YGFIBM20081126\\SQLEXPRESS';database='ScoreMIS';uid='sa';pwd='dbp wd';");sda = new SqlDataAdapter("select ID as 学号,"+ "name as 姓名,class as 班级from students", sqlCon);DataSet ds = new DataSet();sda.Fill(ds, "tablename");DataView dv;dv = ds.Tables["tablename"].DefaultView;if (radioButton1.Checked){dv.Sort = "学号";}else if (radioButton2.Checked){dv.Sort = "姓名";}else{dv.Sort = "班级";}dataGridView1.DataSource = dv;}private void btnFilter_Click(object sender, EventArgs e){sqlCon = new SqlConnection("server='YGFIBM20081126\\SQLEXPRESS';database='ScoreMIS';uid='sa';pwd='dbpwd';");sda = new SqlDataAdapter("select ID as 学号,"+ "name as 姓名,class as 班级from students", sqlCon);DataSet ds = new DataSet();sda.Fill(ds, "tablename");DataView dv;dv = ds.Tables["tablename"].DefaultView;if (radioButton1.Checked){dv.RowFilter = "学号like '%" + cbID.Text + "%'";}else if (radioButton2.Checked){dv.RowFilter = "姓名like '%" + tbName.Text + "%'";}else{dv.RowFilter = "班级like '%" + tbClass.Text + "%'";}dv.RowStateFilter = DataViewRowState.CurrentRows;dataGridView1.DataSource = dv;}private void btnSave_Click(object sender, EventArgs e){if (dbUpdate()){MessageBox.Show("数据库操作成功！", "提示",MessageBoxButtons.OK, rmation);}}}}namespace MouseDrawline{public partial class Form1 : Form{public Form1(){InitializeComponent();g = this.pictureBox1.CreateGraphics();}int LineStartX = 0;int LineStartY = 0;bool blDrawLine = false;Graphics g;private void pictureBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) {if (e.Button == MouseButtons.Left){LineStartX = e.X;LineStartY = e.Y;blDrawLine = true;}}private void pictureBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e){if (blDrawLine){Pen p = new Pen(Color.Blue,2);g.DrawLine(p, LineStartX, LineStartY, e.X, e.Y);LineStartX = e.X;LineStartY = e.Y;}}private void pictureBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e){blDrawLine = false;}private void button1_Click(object sender, EventArgs e){pictureBox1.Refresh();}}}namespace BitmapProcess{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void btnOpen_Click(object sender, EventArgs e){OpenFileDialog openFileDialog1 = new OpenFileDialog();openFileDialog1.Filter = "所有合适文件(*.bmp/*.jpg/*.gif)|*.*|Bitmap文件(*.bmp)|*.bmp|Jpeg文件(*.jpg)|*.jpg";openFileDialog1.FilterIndex = 2;openFileDialog1.RestoreDirectory = true;if (DialogResult.OK == openFileDialog1.ShowDialog()){pictureBox1.Image = Bitmap.FromFile(openFileDialog1.FileName, false);}}private void btnSave_Click(object sender, EventArgs e){Bitmap b2 = new Bitmap(pictureBox1.Image);SaveFileDialog saveFileDialog1 = new SaveFileDialog();saveFileDialog1.ShowDialog();string str = saveFileDialog1.FileName;b2.Save(str);}private void btnDeform_Click(object sender, EventArgs e){Point[] destinationPoints ={new Point(10, 10),new Point(200, 50),new Point(80, 150)};Image image = new Bitmap(pictureBox1.Image);Graphics g = pictureBox1.CreateGraphics();g.DrawImage(image, destinationPoints);}private void btnZoom_Click(object sender, EventArgs e){Image image = new Bitmap(pictureBox1.Image);Image pThumbnail = image.GetThumbnailImage(200, 200, null, new IntPtr());Graphics g = pictureBox1.CreateGraphics();g.DrawImage(pThumbnail, 10, 10, pictureBox1.Image.Width / 2, pictureBox1.Image.Height/2);}}}namespace PicsAnimate{public partial class Form1 : Form{Bitmap[] bitmap;int PicNum=0;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){bitmap = new Bitmap[5];for(int i=1;i<6;i++){bitmap[i-1] = new Bitmap(Application.StartupPath+"\\pics\\p"+i.ToString()+".PNG");}}private void timer1_Tick(object sender, EventArgs e){if (PicNum > 4){PicNum = 0;}pictureBox1.Image = bitmap[PicNum];PicNum++;}private void trackBar1_Scroll(object sender, EventArgs e){timer1.Interval = trackBar1.Value;}}}namespace tab控件等实验{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void radioButton1_CheckedChanged(object sender, EventArgs e){if (radioButton1.Checked == true){splitter1.BorderStyle = System.Windows.Forms.BorderStyle.None;}if (radioButton2.Checked == true){splitter1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;}if (radioButton3.Checked ==true ){splitter1 .BorderStyle =System .Windows .Forms .BorderStyle .Fixed3D ;}}private void radioButton6_CheckedChanged(object sender, EventArgs e){if (radioButton6.Checked == true)panel1.BorderStyle = System.Windows.Forms.BorderStyle.None;}if (radioButton5.Checked == true){panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;}if (radioButton4.Checked == true){panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;}}private void button1_Click(object sender, EventArgs e){if (radioButton7.Checked){tabControl1.Alignment = System.Windows.Forms.TabAlignment.Top;}else if (radioButton8.Checked){tabControl1.Alignment = System.Windows.Forms.TabAlignment.Left ;}else if (radioButton9.Checked){tabControl1.Alignment = System.Windows.Forms.TabAlignment.Right;}else{tabControl1.Alignment = System.Windows.Forms.TabAlignment.Bottom;}if (radioButton13.Checked){tabControl1.Appearance = System.Windows.Forms.TabAppearance.Normal ;}else if (radioButton12.Checked){tabControl1.Appearance = System.Windows.Forms.TabAppearance.Buttons ;}else{tabControl1.Appearance = System.Windows.Forms.TabAppearance.FlatButtons;}if (radioButton16.Checked)tabControl1.SizeMode = System.Windows.Forms.TabSizeMode .Normal ;}else if (radioButton15.Checked){tabControl1.SizeMode = System.Windows.Forms.TabSizeMode.FillToRight;}else{tabControl1.SizeMode = System.Windows.Forms.TabSizeMode.Fixed;}tabControl1.Multiline = checkBox1.Checked;}private void Form1_Load(object sender, EventArgs e){}}}namespace Timer{public partial class Form1 : Form{int r = 0, g = 0, b = 0;public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){if (timer1.Enabled == false){timer1.Enabled = true;button1.Text = "停止";}else{timer1.Enabled = false;button1.Text = "开始";}}private void timer1_Tick(object sender, EventArgs e){if (r < 255)r = r + 5;}else{r = 255;if (g < 255){g += 5;}else{g = 255;if (b < 255){b += 5;}else{r = 0;g = 0;b = 0;}}}label1.ForeColor = Color.FromArgb(r,g,b);}}}namespace WindowsApplication2{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void label1_Click(object sender, EventArgs e){}private void Form1_Load(object sender, EventArgs e){}private void button1_Click(object sender, EventArgs e){foreach (object a in listBox1.SelectedItems){textBox3.Text += a + " ";}}private void comboBox3_SelectedIndexChanged(object sender, EventArgs e){switch (comboBox3.SelectedIndex ){case 0:comboBox4.Items.Clear();comboBox4.Items.Add("长春市");comboBox4.Items.Add("四平市");comboBox4.Items.Add("榆树市");break;case 1:comboBox4.Items.Clear();comboBox4.Items.Add("沈阳市");comboBox4.Items.Add("铁岭市");comboBox4.Items.Add("大连市");break;case 2:comboBox4.Items.Clear();comboBox4.Items.Add("哈尔滨市");comboBox4.Items.Add("大庆市");comboBox4.Items.Add("海伦市");break;default :comboBox4.Items.Clear();break;}comboBox4.Text = "-未选择-";}}}namespace菜单{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void替换ToolStripMenuItem_Click(object sender, EventArgs e){if (替换ToolStripMenuItem.Checked == true){替换ToolStripMenuItem.Checked = false;}else{替换ToolStripMenuItem.Checked = true;}}private void打开ToolStripMenuItem_Click(object sender, EventArgs e){MessageBox.Show("单击了打开菜单！");}private void剪切ToolStripMenuItem1_Click(object sender, EventArgs e){//MessageBox.Show("单击了剪切菜单");richTextBox1.Cut();}private void复制ToolStripMenuItem1_Click(object sender, EventArgs e){richTextBox1.Copy();}private void粘贴ToolStripMenuItem1_Click(object sender, EventArgs e){richTextBox1.Paste();}}}namespace计算器{public partial class Form1 : Form{double x, y;char opr;bool flag = false;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}private void button1_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "1";// button1.Text;}private void button2_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "2";}private void button3_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "3";}private void button5_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "4";}private void button6_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;textBox1.Text += "5";}private void button7_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "6";}private void button9_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "7";}private void button10_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "8";}private void button11_Click(object sender, EventArgs e) {if (flag == true){textBox1.Text = "";flag = false;}textBox1.Text += "9";}private void button14_Click(object sender, EventArgs e) {if (flag == true)textBox1.Text = "";flag = false;}if (textBox1.Text != "0"){textBox1.Text += "0";}}private void button13_Click(object sender, EventArgs e) {if (textBox1.Text == ""){textBox1.Text = "0.";}else{textBox1.Text += ".";}button13.Enabled = false;}private void button4_Click(object sender, EventArgs e) {x = Convert.ToDouble(textBox1.Text );opr = '+';button13.Enabled = true;textBox1.Text = "";}private void button8_Click(object sender, EventArgs e) {x = Convert.ToDouble(textBox1.Text);opr = '-';button13.Enabled = true;textBox1.Text = "";}private void button12_Click(object sender, EventArgs e) {x = Convert.ToDouble(textBox1.Text);opr = '*';button13.Enabled = true;textBox1.Text = "";}private void button16_Click(object sender, EventArgs e) {x = Convert.ToDouble(textBox1.Text);opr = '/';button13.Enabled = true;textBox1.Text = "";}private void button15_Click(object sender, EventArgs e){y = Convert.ToDouble(textBox1.Text);flag = true;switch (opr){case'+':textBox1.Text =Convert.ToString (x+y);break ;case'-':textBox1.Text =Convert.ToString (x-y);break ;case'*':textBox1.Text =Convert.ToString (x*y);break ;case'/':if (y == 0){MessageBox.Show("分母不能为0，请核对后重新输入！");}else{textBox1.Text =Convert.ToString (x/y);}break ;default :break;}}private void button17_Click(object sender, EventArgs e){textBox1.Text ="";}}}namespace记事本{public partial class Form1 : Form{public Form1()InitializeComponent();}private void打开ToolStripMenuItem_Click(object sender, EventArgs e) {OpenFileDialog opdlg = new OpenFileDialog();DialogResult dlgr;opdlg.Filter = "RTF文件(*.rtf)|*.rtf|所有文件(*.*)|*.*";dlgr = opdlg.ShowDialog();if (dlgr == DialogResult.OK){string name = opdlg.FileName;Form2 fr = new Form2();fr.MdiParent = this;fr.Show();RichTextBox rt = new RichTextBox();rt = (RichTextBox) fr.ActiveControl;rt.LoadFile(name,RichTextBoxStreamType.RichText );//fr.Text = name;toolStripStatusLabel1.Text = name;}}private void保存ToolStripMenuItem_Click(object sender, EventArgs e) {SaveFileDialog sfdlg = new SaveFileDialog();DialogResult dlgr;sfdlg.Filter = "RTF文件(*.rtf)|*.rtf|所有文件(*.*)|*.*";dlgr = sfdlg.ShowDialog();if (dlgr == DialogResult.OK){RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.SaveFile(sfdlg.FileName ,RichTextBoxStreamType.RichText );this.ActiveMdiChild.Text = sfdlg.FileName;}}private void新建ToolStripMenuItem_Click(object sender, EventArgs e) {Form2 fr = new Form2();fr.MdiParent = this;fr.Show();}private void字体ToolStripMenuItem_Click(object sender, EventArgs e)FontDialog fd = new FontDialog();fd.ShowDialog();RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.SelectionFont = fd.Font;}private void颜色ToolStripMenuItem_Click(object sender, EventArgs e){ColorDialog cd = new ColorDialog();cd.ShowDialog();RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.SelectionColor = cd.Color;}private void剪切ToolStripMenuItem_Click(object sender, EventArgs e){RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.Cut();}private void复制ToolStripMenuItem_Click(object sender, EventArgs e){RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.Copy();}private void粘贴ToolStripMenuItem_Click(object sender, EventArgs e){RichTextBox rt = new RichTextBox();rt = (RichTextBox)this.ActiveMdiChild.ActiveControl;rt.Paste();}}}namespace textbox{public partial class Form2 : Form{public Form2(){InitializeComponent();}private void richTextBox1_TextChanged(object sender, EventArgs e)}}}namespace选课{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){textBox3.Text = "";for (int i = 0; i < listBox1.SelectedItems.Count; i++){textBox3.Text += listBox1.SelectedItems[i].ToString()+" ";}}private void comboBox3_SelectedIndexChanged(object sender, EventArgs e){switch (comboBox3.SelectedIndex ){case 0:comboBox4.Items.Clear();comboBox4.Items.Add("长春市");comboBox4.Items.Add("四平市");comboBox4.Items.Add("榆树市");break;case 1:comboBox4.Items.Clear();comboBox4.Items.Add("沈阳市");comboBox4.Items.Add("铁岭市");comboBox4.Items.Add("大连市");break;case 2:comboBox4.Items.Clear();comboBox4.Items.Add("哈尔滨市");comboBox4.Items.Add("大庆市");comboBox4.Items.Add("海伦市");break;default :comboBox4.Items.Clear();break;}comboBox4.Text = "-未选择-";}}}namespace WindowsApplication1{public partial class Form1 : Form{float x0, y0, x1, y1, x2, y2, x3, y3, r, r1, r2, r3, j1, j2, j3;nt h, m, s;Graphics g;Pen ph = new Pen(Color.Red, 3);Pen pm = new Pen(Color.Blue, 3);Pen ps = new Pen(Color.Green, 3);private void rePaint(){g.Clear(this.BackColor);g.DrawEllipse(ps,x0-r,y0-r,2*r,2*r);h = DateTime.Now.Hour;m = DateTime.Now.Minute;s = DateTime.Now.Second;j1 =(float ) (s * Math.PI / 30 - Math.PI / 2);x1 = (float ) (x0 + r1 * Math.Cos(j1));y1 = (float ) (y0 + r1 * Math.Sin(j1));g.DrawLine(ps, x0, y0, x1, y1);j2 = (float ) ((m + s / 60.0) * Math.PI / 30 - Math.PI / 2);x2 = (float ) (x0 + r2 * Math.Cos(j2));y2 = (float ) (y0 + r2 * Math.Sin(j2));g.DrawLine(pm, x0, y0, x2, y2);j3 = (float)((h + m / 60.0 + s / 3600.0) * Math.PI / 6 - Math.PI / 2);x3 =(float ) ( x0 + r3 * Math.Cos(j3));y3 =(float ) ( y0 + r3 * Math.Sin(j3));g.DrawLine(ph, x0, y0, x3, y3);Font f=new Font ("宋体",20,FontStyle.Regular );SolidBrush b=new SolidBrush (Color.DarkBlue );int i;for (i=1;i<=12;i++){x1 =(float ) ( x0 + r1 * Math.Sin(i * Math.PI / 6) - f.Height / 2);y1 = (float ) (y0 - r1 * Math.Cos(i * Math.PI / 6) - f.Height / 2);g.DrawString(i.ToString(), f, b, x1, y1);}}public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}private void Form1_Activated(object sender, EventArgs e){g = this.CreateGraphics();x0 = this.Width / 2;y0 = this.Height / 2 - 20;r =(float ) ( this.Height * 0.4);r1 = (float ) (this.Height * 0.3);r2 =(float ) ( r1 * 0.8);r3 =(float ) ( r1 * 0.7);}private void timer1_Tick(object sender, EventArgs e){rePaint();}}}namespace指针钟(C#){public partial class Form1 : Form{float x0, y0, x1, y1, x2, y2, x3, y3, r, r1, r2, r3, j1, j2, j3;int h, m, s;Graphics g;Pen ph = new Pen(Color.Red, 3);Pen pm = new Pen(Color.Blue, 3);Pen ps = new Pen(Color.Green, 3);private void rePaint(){g.Clear(this.BackColor);g.DrawEllipse(ps,x0-r,y0-r,2*r,2*r);h = DateTime.Now.Hour;m = DateTime.Now.Minute;s = DateTime.Now.Second;j1 =(float ) (s * Math.PI / 30 - Math.PI / 2);x1 = (float ) (x0 + r1 * Math.Cos(j1));y1 = (float ) (y0 + r1 * Math.Sin(j1));g.DrawLine(ps, x0, y0, x1, y1);j2 = (float ) ((m + s / 60.0) * Math.PI / 30 - Math.PI / 2);x2 = (float ) (x0 + r2 * Math.Cos(j2));y2 = (float ) (y0 + r2 * Math.Sin(j2));g.DrawLine(pm, x0, y0, x2, y2);j3 = (float)((h + m / 60.0 + s / 3600.0) * Math.PI / 6 - Math.PI / 2);x3 =(float ) ( x0 + r3 * Math.Cos(j3));y3 =(float ) ( y0 + r3 * Math.Sin(j3));g.DrawLine(ph, x0, y0, x3, y3);Font f=new Font ("宋体",20,FontStyle.Regular );SolidBrush b=new SolidBrush (Color.DarkBlue );int i;for (i=1;i<=12;i++){x1 =(float ) ( x0 + r1 * Math.Sin(i * Math.PI / 6) - f.Height / 2);y1 = (float ) (y0 - r1 * Math.Cos(i * Math.PI / 6) - f.Height / 2);g.DrawString(i.ToString(), f, b, x1, y1);}}public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}private void Form1_Activated(object sender, EventArgs e){g = this.CreateGraphics();x0 = this.Width / 2;y0 = this.Height / 2 - 20;r =(float ) ( this.Height * 0.4);r1 = (float ) (this.Height * 0.3);r2 =(float ) ( r1 * 0.8);r3 =(float ) ( r1 * 0.7);}private void timer1_Tick(object sender, EventArgs e){rePaint();}}}。