Winform常用的一些功能收集（持续更新）

        #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);
                }
            }
        }