C# .net窗体实战6：基于RichTextBox的MDI文本编辑器

于 2024-12-31 11:22:47 发布
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分类专栏： 某油地理科专业复习参考 文章标签： c# 开发语言
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本文链接：https://blog.youkuaiyun.com/weixin_74942631/article/details/144845592
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父窗体界面：

子窗体界面：

父窗体代码：

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 E
{
    public partial class MdiMain : Form
    {
        public MdiMain()
        {
            InitializeComponent();
        }
        //以下为顶级菜单“文件”的菜单项
        private void mnuNewFile_Click(object sender, EventArgs e)
        {
            int iCountNewFile = 0;  //该变量统计MDI子窗口成员变量IsNewFile为true的MDI子窗体个数。
            MdiChild myMdiChild;

            for (int i = 0; i < this.MdiChildren.Length; i++)  //此循环统计MDI子窗口成员变量IsNewFile为true的MDI子窗体个数。
            {
                myMdiChild = (MdiChild)this.MdiChildren[i];
                if (myMdiChild.IsNewFile) iCountNewFile++;
            }
            iCountNewFile++;
            
            myMdiChild = new MdiChild();
            myMdiChild.MdiParent = this;
            myMdiChild.Text = "新文件" + iCountNewFile;
            myMdiChild.IsNewFile = true;  //“新建”菜单项的MDI子窗体变量IsNewFile赋值为true。
            myMdiChild.Show();
        }
        private void mnuOpenFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog myOpenFileDialog = new OpenFileDialog();
            myOpenFileDialog.Title = "打开rtf文件对话框";
            myOpenFileDialog.Filter = "rft文件|*.rtf|所有文件|*.*";
            if (myOpenFileDialog.ShowDialog() == DialogResult.OK)
            {
                MdiChild myMdiChild=new MdiChild();
                myMdiChild.MdiParent = this;
                
                myMdiChild.richTextBox1.LoadFile(myOpenFileDialog.FileName);
                myMdiChild.Text = myOpenFileDialog.FileName;
                myMdiChild.IsNewFile = false;  //打开的MDI子窗体变量IsNewFile赋值为false。
                myMdiChild.Show();    
            }
        }
        private void mnuExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        //以上为顶级菜单“文件”的菜单项
        //以下为顶级菜单“编辑”的菜单项
        private void mnuUndo_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild = (MdiChild)this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                myActiveMdiChild.richTextBox1.Undo();//Undo()在TextBox里面就是撤销
            }
        }

        private void mnuRedo_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild = (MdiChild)this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                myActiveMdiChild.richTextBox1.Redo();
            }
        }
        private void mnuCut_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild = (MdiChild)this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                if (myActiveMdiChild.richTextBox1.SelectionLength > 0)
                {
                    myActiveMdiChild.richTextBox1.Cut();
                }
            }
        }
        private void mnuCopy_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild = (MdiChild)this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                if (myActiveMdiChild.richTextBox1.SelectionLength > 0)
                {
                    myActiveMdiChild.richTextBox1.Copy();
                }
            }
        }
        private void mnuPaste_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild = (MdiChild)this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                myActiveMdiChild.richTextBox1.Paste();
            }
        }
        private void mnuSelectAll_Click(object sender, EventArgs e)
        {
            MdiChild myActiveMdiChild =(MdiChild) this.ActiveMdiChild;
            if (myActiveMdiChild != null)
            {
                myActiveMdiChild.richTextBox1.SelectAll();
            }
        }
        //以上为顶级菜单“编辑”的菜单项
        //以下为顶级菜单“窗口”的菜单项
        private void mnuArrangeIcons_Click(object sender, EventArgs e)
        {
            this.LayoutMdi(MdiLayout.ArrangeIcons);//MdiLayout是方法
        }

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

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

        private void mnuTileVertical_Click(object sender, EventArgs e)
        {
            this.LayoutMdi(MdiLayout.TileVertical);
        }
        //关闭所有子窗口
        private void mnuCloseAllChildForm_Click(object sender, EventArgs e)
        {
            foreach (MdiChild myMdiChild in this.MdiChildren) //this.MdiChildren是数组
            {
                myMdiChild.Close();
            }
        }
        //以上为顶级菜单“窗口”菜单项
        private void mnuAbout_Click(object sender, EventArgs e)
        {
            MessageBox.Show("这是一个基于RichTextBox的MDI文本编辑器例子。", "关于", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
    }
}

子窗体代码：

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.Drawing.Printing;

namespace E
{
    public partial class MdiChild : Form
    {
        PrintDocument myPrintDocument;
        SolidBrush myBrush;

        public bool IsNewFile;  //若该MDI子窗口为“新建”菜单项打开的窗口，则赋值为true；
                                //若该MDI子窗口为“打开”菜单项打开的窗口，则赋值为false。

        public MdiChild()
        {
            InitializeComponent();
            myPrintDocument = new PrintDocument();
            myPrintDocument.PrintPage += myPrintDocument_PrintPage;
            myBrush = new SolidBrush(Color.Black);
        }
        void myPrintDocument_PrintPage(object sender, PrintPageEventArgs e)
        {
            myBrush.Color = this.richTextBox1.SelectionColor;
            e.Graphics.DrawString(this.richTextBox1.Text, this.richTextBox1.Font, myBrush, e.MarginBounds);
        }
        //这个设的挺烦的哈哈，因为这样每次都要关闭
        private void MdiChild_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("你打算关闭窗口 \""+ this.Text+"\"吗?","关闭提示", MessageBoxButtons.OKCancel, 
                MessageBoxIcon.Question)== DialogResult.OK)  //this.text表示消息对话框显示的字符串中包含要关闭窗口的标题。
            {
                if (MessageBox.Show("你想保存文件 \"" + this.Text + "\" 吗?", "保存提示", MessageBoxButtons.OKCancel,
                    MessageBoxIcon.Question) == DialogResult.OK)
                    SaveFile();           
            }
            else
                e.Cancel = true;
        }
        //以下为顶级菜单“文件”的菜单项
        private void mnuSaveFile_Click(object sender, EventArgs e)
        {
            SaveFile();
        }
        void SaveFile()  //直接保存分为两种情况，见下面的注释。
        {
            if (this.IsNewFile)
                SaveAsFile();  //若为“新建”菜单项打开的窗口，则保存时使用保存文件对话框，即调用SaveAsFile()方法。
            else
                this.richTextBox1.SaveFile(this.Text);  //若为“打开”菜单项打开的窗口，则保存时直接保存。
        }
        private void mnuSaveAsFile_Click(object sender, EventArgs e)
        {
            SaveAsFile();  //“另存”菜单项调用保存文件对话框，即调用SaveAsFile()方法。
        }
        void  SaveAsFile()
        {
            SaveFileDialog mySaveFileDialog = new SaveFileDialog();

            mySaveFileDialog.Title = "另存rtf文件为";
            mySaveFileDialog.Filter = "写字板文件|*.rtf|所有文件|*.*";
            mySaveFileDialog.CreatePrompt = true;
            mySaveFileDialog.OverwritePrompt = true;

            string strFileFullName = this.Text, strPathName, strFileName;
            int k = strFileFullName.LastIndexOf('\\'); //倒序匹配，返回匹配第一项的下标。
            strPathName = strFileFullName.Substring(0, k + 1);  //存放路径
            strFileName = strFileFullName.Substring(k + 1);       //存放文件名

            mySaveFileDialog.FileName = strFileName;
            if (mySaveFileDialog.ShowDialog() == DialogResult.OK)
            {
                this.richTextBox1.SaveFile(mySaveFileDialog.FileName);
                this.Text = mySaveFileDialog.FileName;
                this.IsNewFile = false;  //只要保存，变量IsNewFile就变成false。
            }
        }
        private void 页面设置VToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PageSetup();
        }
        private void PageSetup()
        {
            PageSetupDialog myPageSetupDialog = new PageSetupDialog();
            myPageSetupDialog.Document = myPrintDocument;
            myPageSetupDialog.PageSettings = myPrintDocument.DefaultPageSettings;
            if (myPageSetupDialog.ShowDialog() == DialogResult.OK)
            {
                myPrintDocument.DefaultPageSettings = myPageSetupDialog.PageSettings;
            }
        }
        private void 打印预览VToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PrintPreview();
        }
        private void PrintPreview()
        {
            PrintPreviewDialog myPrintPreviewDialog = new PrintPreviewDialog();
            myPrintPreviewDialog.Document = myPrintDocument;
            myPrintPreviewDialog.ShowDialog();
        }
        private void 打印PToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Print();
        }
        private void Print()
        {
            PrintDialog myPrintDialog = new PrintDialog();
            myPrintDialog.Document = myPrintDocument;
            if (myPrintDialog.ShowDialog() == DialogResult.OK)
            {
                myPrintDocument.Print();
            }
        }
        private void mnuClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        //以上为顶级菜单“文件”的菜单项
        //以下为顶级菜单“设置”的菜单项
        private void mnuSetupFont_Click(object sender, EventArgs e)
        {
            SetupFont();
        }
        private void SetupFont()
        {
            FontDialog myFontDialog = new FontDialog();
            myFontDialog.ShowEffects = true;
            myFontDialog.ShowColor = true;
            myFontDialog.ShowApply = true;
            myFontDialog.Apply += MyFontDialog_Apply;
            myFontDialog.Font = this.richTextBox1.SelectionFont;
            myFontDialog.Color = this.richTextBox1.SelectionColor;
            if (myFontDialog.ShowDialog() == DialogResult.OK)
            {
                this.richTextBox1.SelectionFont = myFontDialog.Font;
                this.richTextBox1.SelectionColor = myFontDialog.Color;
            }
        }
        private void MyFontDialog_Apply(object sender, EventArgs e)
        {
            this.richTextBox1.SelectionFont = ((FontDialog)sender).Font;
            this.richTextBox1.SelectionColor = ((FontDialog)sender).Color;
        }
        private void mnuSetupColor_Click(object sender, EventArgs e)
        {
            SetupColor();
        }
        private void SetupColor()
        {
            ColorDialog myColorDialog = new ColorDialog();
            myColorDialog.AllowFullOpen = true;
            myColorDialog.Color = this.richTextBox1.SelectionColor;
            if (myColorDialog.ShowDialog() == DialogResult.OK)
            {
                this.richTextBox1.SelectionColor = myColorDialog.Color;
            }
        }
        //以上为顶级菜单“设置”的菜单项
        //以下为右键快捷菜单
        private void cmnuCut_Click(object sender, EventArgs e)
        {
            if (this.richTextBox1.SelectionLength > 0)
                this.richTextBox1.Cut();
        }
        private void cmnuCopy_Click(object sender, EventArgs e)
        {
            if (this.richTextBox1.SelectionLength > 0)
                this.richTextBox1.Copy();
        }
        private void cmnuPaste_Click(object sender, EventArgs e)
        {
            this.richTextBox1.Paste();
        }
        private void cmnuSelectAll_Click(object sender, EventArgs e)
        {
            this.richTextBox1.SelectAll();
        }
        private void cmnuSetupFont_Click(object sender, EventArgs e)
        {
            SetupFont();
        }
        private void cmnuSetupColor_Click(object sender, EventArgs e)
        {
            SetupColor();
        }
        private void 页面设置ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PageSetup();
        }
        private void 打印预览ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PrintPreview();
        }
        private void 打印ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Print();
        }
        //以上为右键快捷菜单
    }
}

实现的功能可以通过代码来看，大致就是如下功能：

父窗体：

子窗体：

然后在打开新文件之后，子窗体的文件菜单条会自动合并到父窗体的文件中。

因为不是系统的，所以可能没有办法给大家进行一个详细的过程分析，但程序最主要的就是代码，相信大家能够在代码中知道实现了什么功能。为了大家方便，我也直接上传了源程序。

共勉！

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