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前言

• 窗体调用外部程序与渐变窗体
• 按回车键跳转窗体中的光标焦点
• 剪切板操作
• 实现拖放操作
• 移动的窗体
• 抓不到的窗体
• MDI窗体
• 提示关闭窗体

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一、窗体调用外部程序与渐变窗体

1、效果

窗体正在变色：

窗体调用网络页面–启动浏览器：

窗体调用本地程序–启动记事本：

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace 调用外部程序与渐变窗体
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.timer1.Enabled = true;
            this.Opacity = 0;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.Opacity < 1)
            {
                this.Opacity += 0.05;
            }
            else
            {
                this.timer1.Enabled = false;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                Process proc = new Process();
                proc.StartInfo.FileName = "notepad.exe";//注意路径
                proc.StartInfo.Arguments = "";//运行参数
                proc.StartInfo.WindowStyle = ProcessWindowStyle.Maximized;//启动窗口状态
                proc.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "注意", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                Process proc = new Process();
                Process.Start("IExplore.exe", "http://www.baidu.com");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "注意", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                Process proc = new Process();
                proc.StartInfo.FileName = @"E:\娱乐工具\qq2012\Bin\QQProtect\Bin\QQProtect";
                proc.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "注意", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
    }
}

二、按回车键跳转窗体中的光标焦点

1、效果

按下enter键，光标会向下移动：

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 回车跳转控件焦点
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //private void txtName_KeyDown(object sender, KeyEventArgs e)
        //{
        //    if (e.KeyCode == Keys.Enter)
        //    {
        //        txtAge.Focus();
        //    }
        //}

        //private void txtAge_KeyDown(object sender, KeyEventArgs e)
        //{
        //    if (e.KeyValue == 13)
        //    {
        //        txtAge.Focus();
        //    }
        //}

        private void EnterToTab(object sender, KeyEventArgs e)
        {
            if (e.KeyValue == 13)
            {
                SendKeys.Send("{TAB}");     //等同于按Tab键
            }
        }
    }
}

三、剪切板操作

1、效果

第一个text中输入内容并选中，点击粘贴就粘贴到第二个text；
下方是图片的复制粘贴，方法一样。

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 剪切板操作
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 剪切
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            if (!textBox1.SelectedText.Equals(""))
                Clipboard.SetText(textBox1.SelectedText);
            else
                MessageBox.Show("未选中文本！");
        }

        /// <summary>
        /// 粘贴
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            if (Clipboard.ContainsText())
                textBox2.Text = Clipboard.GetText();
            else
                MessageBox.Show("剪切板没有文本!");
        }

        /// <summary>
        /// 图片剪切
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            openFileDialog1.FileName = "";
            openFileDialog1.Filter = "jpg文件(*.jpg)|*.jpg|bmp文件(*.bmp)|*.bmp";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                pictureBox1.Image = new Bitmap(openFileDialog1.FileName);
                Clipboard.SetImage(pictureBox1.Image);
            }
        }

        /// <summary>
        /// 图片粘贴
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            if (Clipboard.ContainsImage())
            {
                pictureBox2.Image = Clipboard.GetImage();
            }
        }
    }
}

四、实现拖放操作

1、效果

可以将listview中的节点项鼠标拖动到text中。

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 实现拖放操作
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void lvSource_ItemDrag(object sender, ItemDragEventArgs e)
        {
            lvSource.DoDragDrop(e.Item, DragDropEffects.Copy);
        }

        private void txtMessage_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Copy;
        }

        private void txtMessage_DragDrop(object sender, DragEventArgs e)
        {
            ListViewItem lvi = (ListViewItem)e.Data.GetData(typeof(ListViewItem));
            txtMessage.Text = lvi.Text;

            lvSource.Items.Remove(lvi);
        }
    }
}

五、移动的窗体

1、效果

窗体运行之后自动移动。

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 个性化窗体界面
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public int x=0;
        public int y=300;
        public bool panDuan = false;
        private void timer1_Tick(object sender, EventArgs e)
        {
            if (x == 1366)
                x = 0;
            this.Location = new Point(x, y);
            x += 1;
        }

        private void Form1_MouseEnter(object sender, EventArgs e)
        {
            timer1.Stop();
        }

        private void Form1_MouseLeave(object sender, EventArgs e)
        {
            if(!panDuan)
                timer1.Start();
        }

        private void tsmiExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void contextMenuStrip1_Opened(object sender, EventArgs e)
        {
            panDuan = true;
        }

        private void contextMenuStrip1_Closed(object sender, ToolStripDropDownClosedEventArgs e)
        {
            panDuan = false;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.toolTip1.ToolTipTitle = "嘿嘿";
            this.toolTip1.SetToolTip(this, "看徒弟的憨样！");
        }
    }
}

六、抓不到的窗体

1、效果

此窗体中放入了一张图片，在飘啊飘，抓不到。

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 抓不到的窗体
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        int x, y;
        int count = 0;
        Random rd = new Random();
        private void Form1_Load(object sender, EventArgs e)
        {
            this.toolTip1.ToolTipTitle = "嘿嘿";
            this.toolTip1.SetToolTip(this.pictureBox1, "人品不错，给你抓到了！点击退出！");

            this.timer1.Enabled = true;
            this.Opacity = 0;
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void pictureBox1_MouseEnter(object sender, EventArgs e)
        {
            if (count == 10)
                MessageBox.Show("已经抓了" + count + "次了，可还是没抓到！", "哈哈", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            if (count == 20)
                MessageBox.Show("已经抓了" + count + "次了,是否继续？", "真佩服的坚持", MessageBoxButtons.OK, MessageBoxIcon.Question);
            if (count == 30)
            {
                if ((MessageBox.Show("已经抓了" + count + "次了，”倔驴“这个称号，就赠与你了！", "无语了", MessageBoxButtons.OK, MessageBoxIcon.Warning)) == DialogResult.OK)
                {
                    if ((MessageBox.Show("的人品已经降为负的了！", "注意", MessageBoxButtons.OK, MessageBoxIcon.Warning)) == DialogResult.OK)
                        this.Close();
                }
            }

            this.Opacity = 0;
            this.timer1.Enabled = true;

            x = rd.Next(0, 1300);
            y = rd.Next(0, 700);
            this.Location = new Point(x, y);
            count++;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.Opacity < 1)
            {
                this.Opacity += 0.07;
            }
            else
            {
                this.timer1.Enabled = false;
            }
        }
    }
}

七、MDI文本编辑器窗体

1、效果

功能更强大的文本编辑器。

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MDINotepad
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void tsmiNewTxt_Click(object sender, EventArgs e)
        {
            NotepadForm childForm = new NotepadForm();
            childForm.Text = "新建文本文档.txt";
            childForm.MdiParent = this;
            childForm.Show();
        }

        private void tsmiNewRtf_Click(object sender, EventArgs e)
        {
            NotepadForm childForm = new NotepadForm();
            childForm.Text = "新建富文本文档.rtf";
            childForm.MdiParent = this;
            childForm.Show();
        }

        private void tsmiOpenFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "富文本文档(*.rtf)|*.rtf|文本文档(*.txt)|*.txt";

            if (ofd.ShowDialog() == DialogResult.OK)
            {
                NotepadForm childForm = new NotepadForm(ofd.FileName);
                childForm.MdiParent = this;
                childForm.Show();
            }
        }

        private void tsmiExit_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void tsmiHorizontalLayout_Click(object sender, EventArgs e)
        {
            LayoutMdi(MdiLayout.TileHorizontal);
        }

        private void tsmiVerticalLayout_Click(object sender, EventArgs e)
        {
            LayoutMdi(MdiLayout.TileVertical);
        }

        private void tsmiCascadeLayout_Click(object sender, EventArgs e)
        {
            LayoutMdi(MdiLayout.Cascade);
        }

        private void tsmiMinimize_Click(object sender, EventArgs e)
        {
            foreach (Form childForm in MdiChildren)
            {
                childForm.WindowState = FormWindowState.Minimized;
            }
        }

        private void tsmiMaximize_Click(object sender, EventArgs e)
        {
            foreach (Form childForm in MdiChildren)
            {
                childForm.WindowState = FormWindowState.Maximized;
            }
        }

        private void tsmiAbout_Click(object sender, EventArgs e)
        {
            AboutForm af = new AboutForm();
            af.ShowDialog(this);
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace MDINotepad
{
    public partial class AboutForm : Form
    {
        public AboutForm()
        {
            InitializeComponent();
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace MDINotepad
{
    public partial class NotepadForm : Form
    {
        private int _currentCharIndex;

        #region Code segment for constructors.

        public NotepadForm()
        {
            InitializeComponent();
        }

        public NotepadForm(string filePath): this()
        {
            //判断文件的后缀名，不同的文件类型使用不同的参数打开。

            if (filePath.EndsWith(".rtf", true, null))
                rtbEditor.LoadFile(filePath,
                    RichTextBoxStreamType.RichText);
            else
                rtbEditor.LoadFile(filePath,
                    RichTextBoxStreamType.PlainText);

            Text = filePath;
        }

        #endregion

        #region Code segment for private operations.

        private void Save(string filePath)
        {
            try
            {
                //判断文件的后缀名，不同的文件类型使用不同的参数保存。

                if (filePath.EndsWith(".rtf", true, null))
                    rtbEditor.SaveFile(filePath,
                        RichTextBoxStreamType.RichText);
                else
                    rtbEditor.SaveFile(filePath,
                        RichTextBoxStreamType.PlainText);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private void SaveAs()
        {
            sfdDemo.FilterIndex = Text.EndsWith(".rtf", true, null) ? 1 : 2;

            if (sfdDemo.ShowDialog() == DialogResult.OK)
            {
                Save(sfdDemo.FileName);
                Text = sfdDemo.FileName;
            }
        }

        #endregion

        #region Code segment for event handlers.

        private void tsmiSaveFile_Click(object sender, EventArgs e)
        {
            if (!System.IO.File.Exists(Text))
                SaveAs();
            else
                Save(Text);
        }

        private void tsmiSaveAs_Click(object sender, EventArgs e)
        {
            SaveAs();
        }

        private void tsmiBackColor_Click(object sender, EventArgs e)
        {
            cdDemo.Color = rtbEditor.SelectionBackColor;
            if (cdDemo.ShowDialog() == DialogResult.OK)
            {
                rtbEditor.SelectionBackColor = cdDemo.Color;
            }
        }

        private void rtbEditor_SelectionChanged(object sender, EventArgs e)
        {
            if (rtbEditor.SelectionLength == 0)
            {
                tsmiBackColor.Enabled = false;
                tsmiFont.Enabled = false;
            }
            else
            {
                tsmiBackColor.Enabled = true;
                tsmiFont.Enabled = true;
            }
        }

        private void tsmiFont_Click(object sender, EventArgs e)
        {
            fdDemo.Color = rtbEditor.SelectionColor;
            fdDemo.Font = rtbEditor.SelectionFont;
            if (fdDemo.ShowDialog() == DialogResult.OK)
            {
                rtbEditor.SelectionColor = fdDemo.Color;
                rtbEditor.SelectionFont = fdDemo.Font;
            }
        }

        private void pdEditor_PrintPage(object sender,
            System.Drawing.Printing.PrintPageEventArgs e)
        {
            //存放当前已经处理的高度

            float allHeight = 0;
            //存放当前已经处理的宽度

            float allWidth = 0;
            //存放当前行的高度
            float lineHeight = 0;
            //存放当前行的宽度
            float lineWidth = e.MarginBounds.Right - e.MarginBounds.Left;

            //当前页没有显示满且文件没有打印完，进行循环

            while (allHeight < e.MarginBounds.Height
                && _currentCharIndex < rtbEditor.Text.Length)
            {
                //选择一个字符

                rtbEditor.Select(_currentCharIndex, 1);
                //获取选中的字体

                Font currentFont = rtbEditor.SelectionFont;
                //获取文字的尺寸

                SizeF currentTextSize =
                    e.Graphics.MeasureString(rtbEditor.SelectedText, currentFont);

                //获取的文字宽度，对于字母间隙可以小一些，
                //对于空格间隙可以大些，对于汉字间隙适当调整。

                if (rtbEditor.SelectedText[0] == ' ')
                    currentTextSize.Width = currentTextSize.Width * 1.5f;
                else if (rtbEditor.SelectedText[0] < 255)
                    currentTextSize.Width = currentTextSize.Width * 0.6f;
                else
                    currentTextSize.Width = currentTextSize.Width * 0.75f;

                //初始位置修正2个像素，进行背景色填充

                e.Graphics.FillRectangle(new SolidBrush(rtbEditor.SelectionBackColor),
                    e.MarginBounds.Left + allWidth + 2, e.MarginBounds.Top + allHeight, 
                    currentTextSize.Width, currentTextSize.Height);
                
                //使用指定颜色和字体画出当前字符

                e.Graphics.DrawString(rtbEditor.SelectedText, currentFont, 
                    new SolidBrush(rtbEditor.SelectionColor), 
                    e.MarginBounds.Left + allWidth, e.MarginBounds.Top + allHeight);

                allWidth += currentTextSize.Width;

                //获取最大字体高度作为行高

                if (lineHeight < currentFont.Height)
                    lineHeight = currentFont.Height;

                //是换行符或当前行已满，allHeight加上当前行高度，
                //allWidth和lineHeight都设为0。

                if (rtbEditor.SelectedText == "\n"
                    || e.MarginBounds.Right - e.MarginBounds.Left < allWidth)
                {
                    allHeight += lineHeight;
                    allWidth = 0;
                    lineHeight = 0;
                }
                //继续下一个字符

                _currentCharIndex++;
            }

            //后面还有内容，则还有下一页

            if (_currentCharIndex < rtbEditor.Text.Length)
                e.HasMorePages = true;
            else
                e.HasMorePages = false;
        }

        private void tsmiPrint_Click(object sender, EventArgs e)
        {
            if (pdDemo.ShowDialog() == DialogResult.OK)
            {
                //用户确定了打印机和设置后，进行打印。

                pdEditor.Print();
            }
        }

        private void tsmiPageSetup_Click(object sender, EventArgs e)
        {
            psdDemo.ShowDialog();
        }

        private void tsmiPrintPreview_Click(object sender, EventArgs e)
        {
            ppdDemo.ShowDialog();
        }

        private void pdEditor_BeginPrint(object sender, 
            System.Drawing.Printing.PrintEventArgs e)
        {
            _currentCharIndex = 0;
        }

        #endregion
    }
}

八、提示关闭窗体

1、效果

2、界面设计

3、代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 提示关闭窗口
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            DialogResult choice = MessageBox.Show("确定要关闭窗体吗？", "注意", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);

            if (choice == DialogResult.Cancel)   //判断是否单击“取消按钮”
            {
                e.Cancel = true;
            }
        }

        public class MessageFilter : System.Windows.Forms.IMessageFilter     //禁止窗体拖动的类，继承自System.Windows.Forms.IMessageFilter 接口
        {
            const int WM_NCLBUTTONDOWN = 0x00A1;
            const int HTCAPTION = 2;


            public bool PreFilterMessage(ref System.Windows.Forms.Message m)
            {
                if (m.Msg == WM_NCLBUTTONDOWN && m.WParam.ToInt32() == HTCAPTION)
                    return true;
                return false;
            }
        }
    }
}

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总结