#region progressBar实时显示进度

        private void button1_Click(object sender, EventArgs e)

        {

            int i = 10000;

            progressBar1.Minimum = 0;

            progressBar1.Maximum = i;

            for (int k = 0; k < i; k++)

            {

                progressBar1.Value += 1;

                Application.DoEvents();  //label1实时显示,而非处理完成后再显示

                label1.Text = progressBar1.Value.ToString() ;

            }

        }

        #endregion

        #region 打开文件选择对话框

        private void menuFileLoad_Click(object sender, EventArgs e)

        {

            OpenFileDialog dlg = new OpenFileDialog();

            dlg.Title = "Open Photo";

            dlg.Filter = "jpg files(*.jpg)|*.jpg|All files(*.*)|*.*";

            if (dlg.ShowDialog() == DialogResult.OK)

            {

                try

                {

                    pbxPhoto.Image = new Bitmap(dlg.OpenFile());

                }

                catch (Exception ex)

                {

                    MessageBox.Show(ex.Message);

                }

            }

            dlg.Dispose();

        }

        #endregion

        #region 菜单选中或可选

        private void menuImage_DropDownOpening(object sender, EventArgs e)

        {

            ProcessImageOpening(sender as ToolStripDropDownItem);

        }

        private void ProcessImageOpening(ToolStripDropDownItem parent)

        {

            if (parent != null)

            {

                string enumval = pbxPhoto.SizeMode.ToString();

                foreach (ToolStripMenuItem item in parent.DropDownItems)

                {

                    item.Enabled = (pbxPhoto.Image != null);

                    item.Checked = item.Tag.Equals(enumval);

                }

            }

        }

        #endregion

        #region Timer控件定时操作

        private void button3_Click(object sender, EventArgs e)

        {

            timer1.Enabled = true;

            timer1.Interval = 1000;//1秒1次

            timer1.Tick += new EventHandler(tmr_Tick);

            timer1.Start();

        }

        private void tmr_Tick(object sender, EventArgs e)

        {

            //到达设定时间后的事件

            label1.Text = DateTime.Now.ToString() + "执行了";

        }

        private void button4_Click(object sender, EventArgs e)

        {

            timer1.Enabled = false;

        }

        #endregion

            //ListView新增列

            listView1.Columns.Add("年龄", 100, HorizontalAlignment.Center);

            listView1.Columns.Add("班级", 80, HorizontalAlignment.Center);

            listView1.Columns.Add("性别", 40, HorizontalAlignment.Center);

            listView1.Columns.Add("职业", 100, HorizontalAlignment.Center);

            button5.Enabled = false;

            //ListView新增行 批量更新防闪烁

            listView1.BeginUpdate();

            listView1.Items.Add("row1", "张三", 0);

            listView1.Items["row1"].SubItems.Add("21");

            listView1.Items["row1"].SubItems.Add("98001");

            listView1.Items["row1"].SubItems.Add("男");

            listView1.Items["row1"].SubItems.Add("学生");

            listView1.Items.Add("row2", "李四", 0);

            listView1.Items["row2"].SubItems.Add("22");

            listView1.Items["row2"].SubItems.Add("98002");

            listView1.Items["row2"].SubItems.Add("女");

            listView1.Items["row2"].SubItems.Add("教师");

            listView1.Items.Add("row3", "王五", 0);

            listView1.Items["row3"].SubItems.Add("23");

            listView1.Items["row3"].SubItems.Add("98003");

            listView1.Items["row3"].SubItems.Add("男");

            listView1.Items["row3"].SubItems.Add("工程师");

            listView1.Items.Add("row4", "赵六", 0);

            listView1.Items["row4"].SubItems.Add("24");

            listView1.Items["row4"].SubItems.Add("98004");

            listView1.Items["row4"].SubItems.Add("女");

            listView1.Items["row4"].SubItems.Add("公务员");

            listView1.EndUpdate();

            //设置ListView属性

            listView1.GridLines = true;

            listView1.View = View.Details;

            listView1.LabelEdit = false;

            listView1.HeaderStyle = ColumnHeaderStyle.Clickable;

            //更改行颜色

            for (int i = 0; i < listView1.Items.Count; i++)

            {

                if (i % 2==0)

                {

                    listView1.Items[i].BackColor = Color.Gray;

                }

            }

            listView1.Items.Clear(); //清除列表内容 不包含表头

            listView1.Clear(); //清除列表包含表头

            //画直线

            Graphics g = CreateGraphics();

            Pen p = new Pen(Color.Gray);

            g.DrawLine(p, 0, this.Height / 2, this.Width, this.Height / 2);            

            //画矩形

            g.DrawRectangle(p, 50, 50, 200, 100);

            //画圆形

            g.DrawEllipse(p, 100, 100, 100, 100);

            //画圆柱体

            int height = this.ClientSize.Height - 200;

            int width = this.ClientSize.Width - 50;

            int vHeight = 200;

            int vWidth = 100;

            g.Clear(Color.White);

            SolidBrush brush = new SolidBrush(Color.Gainsboro);

            for (int i = height / 2; i > 0; i--)

            {

                g.DrawEllipse(p, width / 2, i, vHeight, vWidth);

            }

            g.FillEllipse(brush, width / 2, 0, vHeight, vWidth);

            //释放资源

            p.Dispose();

            g.Dispose();

        //读取图片

        //Bitmap bmap = new System.Drawing.Bitmap(@"c:\1.jpg");

        Bitmap bmap = (Bitmap)System.Drawing.Image.FromFile(@"c:\1.jpg");

        //加载图片

        Graphics g = Graphics.FromImage(bmap);

        //定义字体

        Font drawFont = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Millimeter);

        //定义画笔

        SolidBrush drawBrush = new SolidBrush(Color.Red);

        //定义坐标

        int xPos = bmap.Height - (bmap.Height - 25);

        int yPos = 3;

        //绘制文字

        g.DrawString("清纯美女", drawFont, drawBrush, xPos, yPos);

        //保存图片

        bmap.Save(@"c:\2.jpg");

        //释放资源

        bmap.Dispose();

        g.Dispose();

        private void btnExport_Click(object sender, EventArgs e)

        {

            //获取用户选择路径  导出Execl

            SaveFileDialog SaveFile = new SaveFileDialog();

            SaveFile.Filter = "Miscrosoft Office Excel 97-2003 工作表|*.xls|所有文件(*.*)|*.*";

            SaveFile.RestoreDirectory = true;

            if (SaveFile.ShowDialog() == DialogResult.OK)

            {

                string targetPath = SaveFile.FileName;

                if (File.Exists(targetPath)) { File.Delete(targetPath); } File.Copy(fileSource, SaveFile.FileName);

                DialogResult r = MessageBox.Show ("导出数据成功！" , "系统信息" , MessageBoxButtons.OK , MessageBoxIcon.Information ) ;

                if (r == DialogResult.OK)

                {

                    System.Diagnostics.Process.Start(SaveFile.FileName);

                }

            }

        }