工具栏使用示例

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace 工具栏使用示例{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void 粗体BToolStripMenuItem_Click(object sender, EventArgs e)        {            if (this.richTextBox1.SelectionFont == null) return;            ToolStripMenuItem menuItem = (ToolStripMenuItem)sender;            Font oldFont = this.richTextBox1.SelectionFont;            Font newFont;            if (menuItem.Checked)                newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);            else newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold);            this.richTextBox1.SelectionFont = newFont;            this.toolStripButtonBold.Checked = menuItem.Checked;        }        private void 斜体IToolStripMenuItem_Click(object sender, EventArgs e)        {            if (this.richTextBox1.SelectionFont == null) return;            ToolStripMenuItem menuItem = (ToolStripMenuItem)sender;            Font oldFont = this.richTextBox1.SelectionFont;            Font newFont;            if (menuItem.Checked)                newFont = new Font(oldFont, oldFont.Style | FontStyle.Italic);            else newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Italic);            this.richTextBox1.SelectionFont = newFont;            this.toolStripButtonItalic.Checked = menuItem.Checked;        }        private void 下划线UToolStripMenuItem_Click(object sender, EventArgs e)        {            if (this.richTextBox1.SelectionFont == null) return;            Font oldFont = richTextBox1.SelectionFont;            ToolStripMenuItem menuItem = (ToolStripMenuItem)sender;            Font newFont;            if (menuItem.Checked)                newFont = new Font(oldFont, oldFont.Style | FontStyle.Underline);            else newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Underline);            this.richTextBox1.SelectionFont = newFont;            this.toolStripButtonUnderLine.Checked = menuItem.Checked;        }        private void alignToolStipMenuItem_Click(object sender, EventArgs e)        {            ToolStripMenuItem menuItem = (ToolStripMenuItem)sender;            switch (menuItem.Text)            {                case "左对齐（&L）":                    this.richTextBox1.SelectionAlignment = HorizontalAlignment.Left;                    this.左对齐LToolStripMenuItem.Checked = true;                    this.toolStripButtonLeft.Checked = true;                    this.右对齐RToolStripMenuItem.Checked = false;                    this.toolStripButtonRight.Checked = false;                    this.居中CToolStripMenuItem.Checked = false;                    this.toolStripButtonCenter.Checked = false;                    break;                case "居中（&C）":                    this.richTextBox1.SelectionAlignment = HorizontalAlignment.Center;                    this.左对齐LToolStripMenuItem.Checked = false;                    this.toolStripButtonLeft.Checked = false;                    this.右对齐RToolStripMenuItem.Checked = false;                    this.toolStripButtonRight.Checked = false;                    this.居中CToolStripMenuItem.Checked = true;                    this.toolStripButtonCenter.Checked = true;                    break;                case "右对齐（&R）":                    this.richTextBox1.SelectionAlignment = HorizontalAlignment.Right;                    this.左对齐LToolStripMenuItem.Checked = false;                    this.toolStripButtonLeft.Checked = false;                    this.右对齐RToolStripMenuItem.Checked = true;                    this.toolStripButtonRight.Checked = true;                    this.居中CToolStripMenuItem.Checked = false;                    this.toolStripButtonCenter.Checked = false;                    break;            }        }        private void richTextBox1_SelectionChanged(object sender, EventArgs e)        {            if (this.richTextBox1.SelectionFont == null) return;            float fontSize = this.richTextBox1.SelectionFont.Size;            string fontName = this.richTextBox1.SelectionFont.Name;            HorizontalAlignment align = this.richTextBox1.SelectionAlignment;            //格式刷            this.粗体BToolStripMenuItem.Checked = this.richTextBox1.SelectionFont.Bold;            this.toolStripButtonBold.Checked = this.richTextBox1.SelectionFont.Bold;            this.斜体IToolStripMenuItem.Checked = this.richTextBox1.SelectionFont.Italic;            this.toolStripButtonItalic.Checked = this.richTextBox1.SelectionFont.Italic;            this.toolStripButtonUnderLine.Checked = this.richTextBox1.SelectionFont.Underline;            this.下划线UToolStripMenuItem.Checked = this.richTextBox1.SelectionFont.Underline;            this.居中CToolStripMenuItem.Checked = (align == HorizontalAlignment.Center);            this.toolStripButtonLeft.Checked = (align == HorizontalAlignment.Left);            this.左对齐LToolStripMenuItem.Checked = (align == HorizontalAlignment.Left);            this.toolStripButtonCenter.Checked = (align == HorizontalAlignment.Center);            this.右对齐RToolStripMenuItem.Checked = (align == HorizontalAlignment.Right);            this.toolStripButtonRight.Checked = (align == HorizontalAlignment.Right);            //禁用粘贴，复制，剪切工具            this.toolStripButtonCut.Enabled = (this.richTextBox1.SelectionLength > 0);            this.toolStripButtonCopy.Enabled = (this.richTextBox1.SelectionLength > 0);            this.toolStripButtonPaste.Enabled = (Clipboard.GetText().Length > 0);        }        private void toolstripButton_Click(object sender, EventArgs e)        {            ToolStripButton tsb = (ToolStripButton)sender;            string text = tsb.Text;            switch (text)            {                case "粗体":                    this.粗体BToolStripMenuItem.PerformClick();                    break;                case "斜体":                    this.斜体IToolStripMenuItem.PerformClick();                    break;                case "下划线":                    this.下划线UToolStripMenuItem.PerformClick();                    break;                case "左对齐":                    this.左对齐LToolStripMenuItem.PerformClick();                    break;                case "右对齐":                    this.右对齐RToolStripMenuItem.PerformClick();                    break;                case "居中":                    this.居中CToolStripMenuItem.PerformClick();                    break;            }        }    }}