main.cs

Microsoft?Visual C#?.NET (Core Reference)

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
namespace RichTextBoxPad
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class MainForm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.RichTextBox richTextBox;
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem FileMenuItem;
		private System.Windows.Forms.MenuItem editMenuItem;
		private System.Windows.Forms.MenuItem editFontMenuItem;
		private System.Windows.Forms.MenuItem editColorMenuItem;
		private System.Windows.Forms.MenuItem fileOpenMenuItem;
		private System.Windows.Forms.MenuItem fileSaveMenuItem;
		private System.Windows.Forms.MenuItem fileSaveAsMenuItem;
		private System.Windows.Forms.MenuItem menuItem8;
		private System.Windows.Forms.MenuItem fileExitMenuItem;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;


		const string _fileFilter = "RTF files (*.rtf)|*.rtf|" +
									"txt files (*.txt)|*.txt|" +
									"All files (*.*)|*.*";
		const string _overwriteWarning = "File already exists, OK to overwrite?";
		const string _appName = "Mini RTF Editor";
		string _fileName = "";
		string _pathName = "";

		public MainForm()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.richTextBox = new System.Windows.Forms.RichTextBox();
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.FileMenuItem = new System.Windows.Forms.MenuItem();
			this.editMenuItem = new System.Windows.Forms.MenuItem();
			this.editFontMenuItem = new System.Windows.Forms.MenuItem();
			this.editColorMenuItem = new System.Windows.Forms.MenuItem();
			this.fileOpenMenuItem = new System.Windows.Forms.MenuItem();
			this.fileSaveMenuItem = new System.Windows.Forms.MenuItem();
			this.fileSaveAsMenuItem = new System.Windows.Forms.MenuItem();
			this.menuItem8 = new System.Windows.Forms.MenuItem();
			this.fileExitMenuItem = new System.Windows.Forms.MenuItem();
			this.SuspendLayout();
			// 
			// richTextBox
			// 
			this.richTextBox.Dock = System.Windows.Forms.DockStyle.Fill;
			this.richTextBox.Name = "richTextBox";
			this.richTextBox.Size = new System.Drawing.Size(292, 266);
			this.richTextBox.TabIndex = 0;
			this.richTextBox.Text = "";
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																						this.FileMenuItem,
																						this.editMenuItem});
			// 
			// FileMenuItem
			// 
			this.FileMenuItem.Index = 0;
			this.FileMenuItem.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																							this.fileOpenMenuItem,
																							this.fileSaveMenuItem,
																							this.fileSaveAsMenuItem,
																							this.menuItem8,
																							this.fileExitMenuItem});
			this.FileMenuItem.Text = "&File";
			// 
			// editMenuItem
			// 
			this.editMenuItem.Index = 1;
			this.editMenuItem.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																							this.editFontMenuItem,
																							this.editColorMenuItem});
			this.editMenuItem.Text = "&Edit";
			this.editMenuItem.Popup += new System.EventHandler(this.editMenuItem_Popup);
			// 
			// editFontMenuItem
			// 
			this.editFontMenuItem.Index = 0;
			this.editFontMenuItem.Text = "&Font...";
			this.editFontMenuItem.Click += new System.EventHandler(this.editFontMenuItem_Click);
			// 
			// editColorMenuItem
			// 
			this.editColorMenuItem.Index = 1;
			this.editColorMenuItem.Text = "&Color...";
			this.editColorMenuItem.Click += new System.EventHandler(this.editColorMenuItem_Click);
			// 
			// fileOpenMenuItem
			// 
			this.fileOpenMenuItem.Index = 0;
			this.fileOpenMenuItem.Text = "&Open...";
			this.fileOpenMenuItem.Click += new System.EventHandler(this.fileOpenMenuItem_Click);
			// 
			// fileSaveMenuItem
			// 
			this.fileSaveMenuItem.Index = 1;
			this.fileSaveMenuItem.Text = "&Save";
			this.fileSaveMenuItem.Click += new System.EventHandler(this.fileSaveMenuItem_Click);
			// 
			// fileSaveAsMenuItem
			// 
			this.fileSaveAsMenuItem.Index = 2;
			this.fileSaveAsMenuItem.Text = "Save &As...";
			this.fileSaveAsMenuItem.Click += new System.EventHandler(this.fileSaveAsMenuItem_Click);
			// 
			// menuItem8
			// 
			this.menuItem8.Index = 3;
			this.menuItem8.Text = "-";
			// 
			// fileExitMenuItem
			// 
			this.fileExitMenuItem.Index = 4;
			this.fileExitMenuItem.Text = "E&xit";
			this.fileExitMenuItem.Click += new System.EventHandler(this.fileExitMenuItem_Click);
			// 
			// MainForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																			this.richTextBox});
			this.Menu = this.mainMenu1;
			this.Name = "MainForm";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.MainForm_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new MainForm());
		}

		private void fileExitMenuItem_Click(object sender, System.EventArgs e)
		{
			Close();
		}

		private void fileSaveAsMenuItem_Click(object sender, System.EventArgs e)
		{
			SaveTextToNewPath();
		}

		private void MainForm_Load(object sender, System.EventArgs e)
		{
			Text = _appName + " - " + "[empty]";
		}

		private void fileOpenMenuItem_Click(object sender, System.EventArgs e)
		{
			OpenFileDialog dlg = new OpenFileDialog();
			dlg.Filter = _fileFilter;
			dlg.InitialDirectory = Application.CommonAppDataPath;
			dlg.CheckFileExists = false;
			if(dlg.ShowDialog() == DialogResult.OK)
			{
				string path = dlg.FileName;
				if(File.Exists(path) != true)
				{
					StreamWriter writer = File.CreateText(path);
					writer.Close();
				}
				_fileName = Path.GetFileName(path);
				_pathName = path;
				Text = _appName + " - " +  _fileName;
				FileAttributes attribs = File.GetAttributes(path);
				FileInfo info = new FileInfo(path);
				if(info.Extension.ToUpper() == "RTF")
					richTextBox.LoadFile(path, RichTextBoxStreamType.RichText);
				else
					richTextBox.LoadFile(path, RichTextBoxStreamType.PlainText);
			}
		}

		private void SaveTextToPath(string path)
		{
			FileInfo info = new FileInfo(path);
			if(info.Extension.ToUpper() == "RTF")
				richTextBox.SaveFile(path, RichTextBoxStreamType.RichText);
			else
				richTextBox.SaveFile(path, RichTextBoxStreamType.PlainText);
		}

		private void SaveTextToNewPath()
		{
			SaveFileDialog dlg = new SaveFileDialog();
			dlg.Filter = _fileFilter;
			dlg.InitialDirectory = Application.CommonAppDataPath;
			if(dlg.ShowDialog() == DialogResult.OK)
			{
				string path = dlg.FileName;
				if(File.Exists(path) == true)
				{
					DialogResult result = MessageBox.Show(_overwriteWarning,
						_appName,
						MessageBoxButtons.OKCancel,
						MessageBoxIcon.Question);
					if(result == DialogResult.Cancel)
						return;
				}
				_fileName = Path.GetFileName(path);
				_pathName = path;
				Text = _appName + " - " +  _fileName;
				SaveTextToPath(path);
			}
		}

		private void fileSaveMenuItem_Click(object sender, System.EventArgs e)
		{
			if(_fileName != null && _fileName != "")
				SaveTextToPath(_pathName);
			else
				SaveTextToNewPath();
		}

		private void editFontMenuItem_Click(object sender, System.EventArgs e)
		{
			FontDialog dlg = new FontDialog();
			dlg.Font = richTextBox.SelectionFont;
			if(dlg.ShowDialog() == DialogResult.OK)
			{
				richTextBox.SelectionFont = dlg.Font;

			}
		}

		private void editColorMenuItem_Click(object sender, System.EventArgs e)
		{
			ColorDialog dlg = new ColorDialog();
			dlg.Color = richTextBox.SelectionColor;
			if(dlg.ShowDialog() == DialogResult.OK)
			{
				richTextBox.SelectionColor = dlg.Color;
			}
		}

		private void editMenuItem_Popup(object sender, System.EventArgs e)
		{
			if(richTextBox.SelectionLength > 0)
			{
				editFontMenuItem.Enabled = true;
				editColorMenuItem.Enabled = true;
			}
			else
			{
				editFontMenuItem.Enabled = false;
				editColorMenuItem.Enabled = false;
			}
		}
	}
}