winform 各种小功能

1.  实现待查询功能的combox

 private void Frm_Main_Load(object sender, EventArgs e)
        {
            cbox_Find.Items.Clear();//清空ComboBox集合
            cbox_Find.Items.Add("C#编程词典");//向ComboBox集合添加元素
            cbox_Find.Items.Add("C#编程宝典");//向ComboBox集合添加元素
            cbox_Find.Items.Add("C#视频学");//向ComboBox集合添加元素
            cbox_Find.Items.Add("C#范例宝典");//向ComboBox集合添加元素
            cbox_Find.Items.Add("C#从入门到精通");//向ComboBox集合添加元素
            cbox_Find.Items.Add("C#范例大全");//向ComboBox集合添加元素
        }

        private void btn_Begin_Click(object sender, EventArgs e)
        {
            cbox_Find.AutoCompleteMode = //设置自动完成的模式
                AutoCompleteMode.SuggestAppend;
            cbox_Find.AutoCompleteSource = //设置自动完成字符串的源
                AutoCompleteSource.ListItems;
        }

2  在combox下拉列表中显示图片

        private ImageList G_ImageList;//声明ImageList字段


        private void cbox_DisplayPictures_DrawItem(object sender, DrawItemEventArgs e)
        {
            if (G_ImageList != null)//判断ImageList是否为空
            {
                Graphics g = e.Graphics;//得到绘图对象
                Rectangle r = e.Bounds;//得到绘图范围
                Size imageSize = G_ImageList.ImageSize;//获取图像大小
                if (e.Index >= 0)//判断是否有绘制项
                {
                    Font fn = new Font("宋体", 10, FontStyle.Bold);//创建字体对象
                    string s = cbox_DisplayPictures.Items[e.Index].ToString();//得到绘制项的字符串
                    DrawItemState dis = e.State;
                    if (e.State == (DrawItemState.NoAccelerator | DrawItemState.NoFocusRect))
                    {
                        e.Graphics.FillRectangle(new SolidBrush(Color.LightYellow), r);//画条目背景
                        G_ImageList.Draw(e.Graphics, r.Left, r.Top, e.Index);//绘制图像
                        e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black),//显示字符串
                            r.Left + imageSize.Width, r.Top);
                        e.DrawFocusRectangle();//显示取得焦点时的虚线框
                    }
                    else
                    {
                        e.Graphics.FillRectangle(new SolidBrush(Color.LightGreen), r);//画条目背景
                        G_ImageList.Draw(e.Graphics, r.Left, r.Top, e.Index);//绘制图像
                        e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black),//显示字符串 
                            r.Left + imageSize.Width, r.Top);
                        e.DrawFocusRectangle();//显示取得焦点时的虚线框 
                    }
                }
            }
        }

        private void btn_Begin_Click(object sender, EventArgs e)
        {
            btn_Begin.Enabled = false;//停用开始按钮
            cbox_DisplayPictures.DrawMode = DrawMode.OwnerDrawFixed;//设置绘制元素方式
            cbox_DisplayPictures.DropDownStyle = //设置组合框样式
                ComboBoxStyle.DropDownList;
            cbox_DisplayPictures.Items.Add("小车");//添加项
            cbox_DisplayPictures.Items.Add("卡车");//添加项
            cbox_DisplayPictures.Items.Add("工具");//添加项
            cbox_DisplayPictures.Items.Add("朋友");//添加项
            G_ImageList = new ImageList();//创建ImageList对象
            G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.a);//添加图片
            G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.b);//添加图片
            G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.c);//添加图片
            G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.d);//添加图片
        }

3.实现气泡提示窗口

        private void clewButton_Click(object sender,EventArgs e)
        {
            this.notifyIcon1.Visible = true;//设置提示控件可见
            this.notifyIcon1.ShowBalloonTip(1000,"当前时间：",DateTime.Now.ToLocalTime().ToString(),ToolTipIcon.Info);//显示气泡提示
        }

        private void closeButton_Click(object sender,EventArgs e)
        {
            this.notifyIcon1.Visible = false;//设置提示控件不可见
        }

        private void notifyIcon1_MouseMove(object sender,MouseEventArgs e)
        {
            this.notifyIcon1.ShowBalloonTip(1000, "当前时间：", DateTime.Now.ToLocalTime().ToString(), ToolTipIcon.Info);//显示气泡提示
        }

 

标签：功能,各种,Items,Add,添加,cbox,ImageList,Find,winform
来源： https://www.cnblogs.com/for-easy-fast/p/16545773.html