form1.cs

能实现文本编辑的功能

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

namespace TextEditor
{
    public partial class Form1 : Form
    {
        #region 全局变量

        private bool docHasData = false;        //是否加载了文件
        private bool docHasChanged = false;     //文本是否发生改变
        private string docName="";              //当前加载的文件名
        private bool docHasSaved=false;         //当前文件是否保存
        private int row, field;                 //行列
        private bool autoNewLine = false;       //自动换行

        #endregion

        #region 窗体载入时的处理

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.CenterToScreen();
            this.richTextBox1.Location = new System.Drawing.Point(0, 24 + this.toolBar1.Height);
            this.richTextBox1.Size = new System.Drawing.Size(this.Width - 10, this.Height - this.toolBar1.Height - this.menuStrip1.Height - 36 - this.statusBar1.Height);
            this.statusBar1.Width = this.Width - 8;
            this.statusBarLocation.Width = statusBar1.Width/3;
            this.statusBarLines.Width = statusBar1.Width/3;
            this.statusBarTime.Width = statusBar1.Width - statusBarLocation.Width - statusBarLines.Width;
        }

        #endregion

        #region 窗体和文本框接受拖进来的数据的事件处理
        private void Form1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.Link;
            else
                e.Effect = DragDropEffects.None;
        }

        private void Form1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
        {
            if (!docHasData || !docHasChanged || docHasSaved)
            {
                docName = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (docName!= "")
                {
                    FileStream file = new FileStream(docName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    reader.Close();
                    file.Close();
                }
            }
            else if (docHasChanged || !docHasSaved)
            {
                string strask1;
                if (docName != "")
                    strask1 = "是否保存: " + docName + " ?";
                else
                    strask1 = "是否保存 未命名.txt ?";
                DialogResult asksave = MessageBox.Show(strask1, "退出", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
                if (asksave == DialogResult.Yes)
                {
                    menuFileSave_Click(sender, e);
                }
                docName = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (docName != "")
                {
                    FileStream file = new FileStream(docName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    reader.Close();
                    file.Close();
                }
            }
        }

        private void richTextBox1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.Link;
            else
                e.Effect = DragDropEffects.None;
        }

        private void richTextBox1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
        {
            if (!docHasData || !docHasChanged || docHasSaved)
            {
                docName = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (docName != "")
                {
                    FileStream file = new FileStream(docName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    reader.Close();
                    file.Close();
                }
            }
            else if (docHasChanged || !docHasSaved)
            {
                string strask1;
                if (docName != "")
                    strask1 = "是否保存: " + docName + " ?";
                else
                    strask1 = "是否保存 未命名.txt ?";
                DialogResult asksave = MessageBox.Show(strask1, "退出", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
                if (asksave == DialogResult.Yes)
                {
                    menuFileSave_Click(sender, e);
                }
                docName = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (docName != "")
                {
                    FileStream file = new FileStream(docName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    reader.Close();
                    file.Close();
                }
            }
        }
        #endregion

        #region 改变窗体大小时的处理

        //保证文本框等能够根据窗体大小的改变而自适应地改变大小
        private void Form1_ClientSizeChanged(object sender, EventArgs e)
        {
            this.richTextBox1.Location = new System.Drawing.Point(0, 24+this.toolBar1.Height);
            this.richTextBox1.Size = new System.Drawing.Size(this.Width-10, this.Height-this.toolBar1.Height-this.menuStrip1.Height-36-this.statusBar1.Height);
            this.statusBar1.Width = this.Width - 8;
            this.statusBarLocation.Width = statusBar1.Width/3;
            this.statusBarLines.Width = statusBar1.Width/3;
            this.statusBarTime.Width = statusBar1.Width-statusBarLocation.Width-statusBarLines.Width;
        }

        #endregion

        #region 点击文本框以及在文本框中按下键和文本框内容改变时的处理

        private void richTextBox1_Click(object sender, EventArgs e)
        {
            int begin = 0;
            int fronting = richTextBox1.SelectionStart;
            row = richTextBox1.GetLineFromCharIndex(richTextBox1.SelectionStart);
            while (begin < fronting)
            {
                if (row == richTextBox1.GetLineFromCharIndex(begin))
                {
                    break;
                }
                else
                {
                    begin++;
                }
            }
            field = fronting - begin;
            row++;
            field++;
            statusBarLocation.Text = "行:" + row + " 列:" + field;
        }

        private void richTextBox1_KeyDown(object sender, EventArgs e)
        {
            int begin = 0;
            int fronting = richTextBox1.SelectionStart;
            row = richTextBox1.GetLineFromCharIndex(richTextBox1.SelectionStart);
            while (begin < fronting)
            {
                if (row == richTextBox1.GetLineFromCharIndex(begin))
                {
                    break;
                }
                else
                {
                    begin++;
                }
            }
            field = fronting - begin;
            row++;
            field++;
            statusBarLocation.Text = "行:" + row + " 列:" + field;
            docHasChanged = true;
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            docHasChanged = true;
            string[] lines = richTextBox1.Lines;
            statusBarLines.Text = "共有 " + (lines.Length) + " 个回车";
        }

        #endregion

        #region 工具条按钮处理

        private void toolBar1_ButtonClick(object sender, ToolBarButtonClickEventArgs e)
        {
            switch (e.Button.Name)
            {
                case "toolBarNew":
                    menuFileNew_Click(sender, e);
                    break;
                case "toolBarOpen":
                    menuFileOpen_Click(sender, e);
                    break;
                case "toolBarSave":
                    menuFileSave_Click(sender, e);
                    break;
                case "toolBarUndo":
                    menuEditUndo_Click(sender, e);
                    break;
                case "toolBarSelectAll":
                    menuEditSelectAll_Click(sender, e);
                    break;
                case "toolBarCut":
                    richTextBox1.Cut();
                    break;
                case "toolBarCopy":
                    richTextBox1.Copy();
                    break;
                case "toolBarPaste":
                    richTextBox1.Paste();
                    break;
                case "toolBarDelete":
                    menuEditDelete_Click(sender, e);
                    break;
                case "toolBarFind":
                    menuEditFind_Click(sender, e);
                    break;
                case "toolBarReplace":
                    menuEditReplace_Click(sender, e);
                    break;
                case "toolBarFont":
                    FontDialog font = new FontDialog();
                    if (font.ShowDialog() == DialogResult.OK)
                        richTextBox1.SelectionFont= font.Font;
                    docHasChanged = true;
                    break;
                case "toolBarColor":
                    ColorDialog color = new ColorDialog();
                    if (color.ShowDialog() == DialogResult.OK)
                        richTextBox1.SelectionColor = color.Color;
                    docHasChanged = true;
                    break;
                case "toolBarHelp":
                    menuHelpTheme_Click(sender, e);
                    break;
                case "toolBarAbout":
                    menuHelpAbout_Click(sender, e);
                    break;
            }
        }

        #endregion

        #region 所有菜单处理

        //
        //打开
        //
        private void menuFileOpen_Click(object sender, EventArgs e)
        {
            if (!docHasData || !docHasChanged || docHasSaved)
            {
                openFileDialog1.ShowDialog();
                docName = openFileDialog1.FileName;
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (openFileDialog1.FileName != "")
                {
                    FileStream file = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    docHasSaved = false;
                    reader.Close();
                    file.Close();
                }
            }
            else if (docHasChanged || !docHasSaved)
            {
                string strask1;
                if (docName != "")
                    strask1 = "是否保存: " + docName + " ?";
                else
                    strask1 = "是否保存 未命名.txt ?";
                DialogResult asksave = MessageBox.Show(strask1, "退出", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
                if (asksave == DialogResult.Yes)
                {
                    menuFileSave_Click(sender, e);
                }
                openFileDialog1.ShowDialog();
                docName = openFileDialog1.FileName;
                if (docName != "")
                    this.Text = "TextEditor - " + docName;
                if (openFileDialog1.FileName != "")
                {
                    FileStream file = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.ReadWrite);
                    StreamReader reader = new StreamReader(file, System.Text.Encoding.GetEncoding("GB2312"));
                    richTextBox1.Text = reader.ReadToEnd();
                    docHasData = true;
                    file.Close();
                    reader.Close();
                    docHasSaved = false;
                }
            }
        }

        //
        //全选
        //
        private void menuEditSelectAll_Click(object sender, EventArgs e)
        {
            richTextBox1.SelectAll();
        }

        //
        //剪切
        //
        private void menuEditCut_Click(object sender, EventArgs e)
        {
            richTextBox1.Cut();
        }

        //
        //复制
        //
        private void menuEditCopy_Click(object sender, EventArgs e)
        {
            richTextBox1.Copy();
        }

        //
        //粘贴
        //
        private void menuEditPaste_Click(object sender, EventArgs e)
        {
            richTextBox1.Paste();
        }

        //
        //插入时期时间
        //
        private void menuEditDate_Click(object sender, EventArgs e)
        {
            richTextBox1.SelectedText = DateTime.Now.ToString();
        }

        //
        //撤消