(一).说明
功能类似Windows 操作系统自带的记事本. 一个WinForm记事本程序(包含主/下拉/弹出
菜单/打开保存对话框等控件用法以及记事本菜单事件的具体代码)
(二).图片示例
(三).代码
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Printing;
using System.Data;
namespace 记事本
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class FormMain : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBoxEdit;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem8;
private System.Windows.Forms.MenuItem menuItem11;
private System.Windows.Forms.MenuItem menuItem14;
private System.Windows.Forms.MenuItem menuItem19;
private System.Windows.Forms.MenuItem menuItem22;
private System.Windows.Forms.MenuItem menuItemFile;
private System.Windows.Forms.MenuItem menuItemEdit;
private System.Windows.Forms.MenuItem menuItemFormat;
private System.Windows.Forms.MenuItem menuItemNew;
private System.Windows.Forms.MenuItem menuItemOpen;
private System.Windows.Forms.MenuItem menuItemSave;
private System.Windows.Forms.MenuItem menuItemSaveAs;
private System.Windows.Forms.MenuItem menuItemPageSet;
private System.Windows.Forms.MenuItem menuItemPrint;
private System.Windows.Forms.MenuItem menuItemExit;
private System.Windows.Forms.MenuItem menuItemUndo;
private System.Windows.Forms.MenuItem menuItemCut;
private System.Windows.Forms.MenuItem menuItemCopy;
private System.Windows.Forms.MenuItem menuItemPaste;
private System.Windows.Forms.MenuItem menuItemDel;
private System.Windows.Forms.MenuItem menuItemSelAll;
private System.Windows.Forms.MenuItem menuItemWordWrap;
private System.Windows.Forms.MenuItem menuItemFont;
private System.Windows.Forms.MenuItem menuItemColor;
const int MaxLenght=2000000;
private string currentFileName;
private System.Drawing.Printing.PrintDocument printDocument=new PrintDocument();
private bool needToSave;
public FormMain()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.textBoxEdit = new System.Windows.Forms.TextBox();
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItemFile = new System.Windows.Forms.MenuItem();
this.menuItemNew = new System.Windows.Forms.MenuItem();
this.menuItemOpen = new System.Windows.Forms.MenuItem();
this.menuItemSave = new System.Windows.Forms.MenuItem();
this.menuItemSaveAs = new System.Windows.Forms.MenuItem();
this.menuItem8 = new System.Windows.Forms.MenuItem();
this.menuItemPageSet = new System.Windows.Forms.MenuItem();
this.menuItemPrint = new System.Windows.Forms.MenuItem();
this.menuItem11 = new System.Windows.Forms.MenuItem();
this.menuItemExit = new System.Windows.Forms.MenuItem();
this.menuItemEdit = new System.Windows.Forms.MenuItem();
this.menuItemUndo = new System.Windows.Forms.MenuItem();
this.menuItem14 = new System.Windows.Forms.MenuItem();
this.menuItemCut = new System.Windows.Forms.MenuItem();
this.menuItemCopy = new System.Windows.Forms.MenuItem();
this.menuItemPaste = new System.Windows.Forms.MenuItem();
this.menuItemDel = new System.Windows.Forms.MenuItem();
this.menuItem19 = new System.Windows.Forms.MenuItem();
this.menuItemSelAll = new System.Windows.Forms.MenuItem();
this.menuItemFormat = new System.Windows.Forms.MenuItem();
this.menuItemWordWrap = new System.Windows.Forms.MenuItem();
this.menuItem22 = new System.Windows.Forms.MenuItem();
this.menuItemFont = new System.Windows.Forms.MenuItem();
this.menuItemColor = new System.Windows.Forms.MenuItem();
this.SuspendLayout();
//
// textBoxEdit
//
this.textBoxEdit.AcceptsTab = true;
this.textBoxEdit.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255)));
this.textBoxEdit.Cursor = System.Windows.Forms.Cursors.Arrow;
this.textBoxEdit.Dock = System.Windows.Forms.DockStyle.Fill;
this.textBoxEdit.Location = new System.Drawing.Point(0, 0);
this.textBoxEdit.MaxLength = 2000000;
this.textBoxEdit.Multiline = true;
this.textBoxEdit.Name = "textBoxEdit";
this.textBoxEdit.ScrollBars = System.Windows.Forms.ScrollBars.Both;
this.textBoxEdit.Size = new System.Drawing.Size(442, 393);
this.textBoxEdit.TabIndex = 0;
this.textBoxEdit.Text = "Hello ChengKing !";
this.textBoxEdit.WordWrap = false;
this.textBoxEdit.TextChanged += new System.EventHandler(this.textBoxEdit_TextChanged);
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItemFile,
this.menuItemEdit,
this.menuItemFormat});
//
// menuItemFile
//
this.menuItemFile.Index = 0;
this.menuItemFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItemNew,
this.menuItemOpen,
this.menuItemSave,
this.menuItemSaveAs,
this.menuItem8,
this.menuItemPageSet,
this.menuItemPrint,
this.menuItem11,
this.menuItemExit});
this.menuItemFile.Text = "文件(&F)";
//
// menuItemNew
//
this.menuItemNew.Index = 0;
this.menuItemNew.Shortcut = System.Windows.Forms.Shortcut.CtrlN;
this.menuItemNew.Text = "新建(&N)";
this.menuItemNew.Click += new System.EventHandler(this.menuItemNew_Click);
//
// menuItemOpen
//
this.menuItemOpen.Index = 1;
this.menuItemOpen.Shortcut = System.Windows.Forms.Shortcut.CtrlO;
this.menuItemOpen.Text = "打开(O)...";
this.menuItemOpen.Click += new System.EventHandler(this.menuItem5_Click);
//
// menuItemSave
//
this.menuItemSave.Index = 2;
this.menuItemSave.Shortcut = System.Windows.Forms.Shortcut.CtrlS;
this.menuItemSave.Text = "保存(&S)";
this.menuItemSave.Click += new System.EventHandler(this.menuItemSave_Click);
//
// menuItemSaveAs
//
this.menuItemSaveAs.Index = 3;
this.menuItemSaveAs.Text = "另存为(A)...";
this.menuItemSaveAs.Click += new System.EventHandler(this.menuItemSaveAs_Click);
//
// menuItem8
//
this.menuItem8.Index = 4;
this.menuItem8.Text = "-";
//
// menuItemPageSet
//
this.menuItemPageSet.Index = 5;
this.menuItemPageSet.Text = "页面设置(U)...";
this.menuItemPageSet.Click += new System.EventHandler(this.menuItemPageSet_Click);
//
// menuItemPrint
//
this.menuItemPrint.Index = 6;
this.menuItemPrint.Shortcut = System.Windows.Forms.Shortcut.CtrlP;
this.menuItemPrint.Text = "打印(&P)";
this.menuItemPrint.Click += new System.EventHandler(this.menuItemPrint_Click);
//
// menuItem11
//
this.menuItem11.Index = 7;
this.menuItem11.Text = "-";
//
// menuItemExit
//
this.menuItemExit.Index = 8;
this.menuItemExit.Text = "退出(&X)";
this.menuItemExit.Click += new System.EventHandler(this.menuItemExit_Click);
//
// menuItemEdit
//
this.menuItemEdit.Index = 1;
this.menuItemEdit.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItemUndo,
this.menuItem14,
this.menuItemCut,
this.menuItemCopy,
this.menuItemPaste,
this.menuItemDel,
this.menuItem19,
this.menuItemSelAll});
this.menuItemEdit.Text = "编辑(&E)";
this.menuItemEdit.Popup += new System.EventHandler(this.menuItemEdit_Popup);
//
// menuItemUndo
//
this.menuItemUndo.Index = 0;
this.menuItemUndo.Shortcut = System.Windows.Forms.Shortcut.CtrlZ;
this.menuItemUndo.Text = "撤消(&U)";
this.menuItemUndo.Click += new System.EventHandler(this.menuItemUndo_Click);
//
// menuItem14
//
this.menuItem14.Index = 1;
this.menuItem14.Text = "-";
//
// menuItemCut
//
this.menuItemCut.Index = 2;
this.menuItemCut.Shortcut = System.Windows.Forms.Shortcut.CtrlX;
this.menuItemCut.Text = "剪切(&T)";
this.menuItemCut.Click += new System.EventHandler(this.menuItemCut_Click);
//
// menuItemCopy
//
this.menuItemCopy.Index = 3;
this.menuItemCopy.Shortcut = System.Windows.Forms.Shortcut.CtrlC;
this.menuItemCopy.Text = "复制(&C)";
this.menuItemCopy.Click += new System.EventHandler(this.menuItemCopy_Click);
//
// menuItemPaste
//
this.menuItemPaste.Index = 4;
this.menuItemPaste.Shortcut = System.Windows.Forms.Shortcut.CtrlP;
this.menuItemPaste.Text = "粘贴(&P)";
this.menuItemPaste.Click += new System.EventHandler(this.menuItemPaste_Click);
//
// menuItemDel
//
this.menuItemDel.Index = 5;
this.menuItemDel.Shortcut = System.Windows.Forms.Shortcut.Del;
this.menuItemDel.Text = "删除(&L)";
this.menuItemDel.Click += new System.EventHandler(this.menuItemDel_Click);
//
// menuItem19
//
this.menuItem19.Index = 6;
this.menuItem19.Text = "-";
//
// menuItemSelAll
//
this.menuItemSelAll.Index = 7;
this.menuItemSelAll.Shortcut = System.Windows.Forms.Shortcut.CtrlA;
this.menuItemSelAll.Text = "全选(&A)";
this.menuItemSelAll.Click += new System.EventHandler(this.menuItemSelAll_Click);
//
// menuItemFormat
//
this.menuItemFormat.Index = 2;
this.menuItemFormat.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItemWordWrap,
this.menuItem22,
this.menuItemFont,
this.menuItemColor});
this.menuItemFormat.Text = "格式(&O)";
//
// menuItemWordWrap
//
this.menuItemWordWrap.Index = 0;
this.menuItemWordWrap.Text = "自动换行(&W)";
//
// menuItem22
//
this.menuItem22.Index = 1;
this.menuItem22.Text = "-";
//
// menuItemFont
//
this.menuItemFont.Index = 2;
this.menuItemFont.Text = "字体(&F)...";
this.menuItemFont.Click += new System.EventHandler(this.menuItemFont_Click);
//
// menuItemColor
//
this.menuItemColor.Index = 3;
this.menuItemColor.Text = "背景颜色(&C)...";
this.menuItemColor.Click += new System.EventHandler(this.menuItemColor_Click);
//
// FormMain
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(442, 393);
this.Controls.Add(this.textBoxEdit);
this.Menu = this.mainMenu1;
this.Name = "FormMain";
this.Text = "ChengKing Rote";
this.Closing += new System.ComponentModel.CancelEventHandler(this.FormMain_Closing);
this.Load += new System.EventHandler(this.FormMain_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new FormMain());
}
private void FormMain_Load(object sender, System.EventArgs e)
{
//textBoxEdit.MaxLength=MaxLength;
//textBoxEdit.Multiline=t
}
private void textBoxEdit_TextChanged(object sender, System.EventArgs e)
{
needToSave=true;
}
private void menuItem5_Click(object sender, System.EventArgs e)
{
if(needToSave==true)
{
DialogResult result=MessageBox.Show("文本内容已经改变,需要保存吗?","保存文件",MessageBoxButtons.YesNoCancel,MessageBoxIcon.Question);
if(result==DialogResult.Cancel)
{
return;
}
if(result==DialogResult.Yes)
{
menuItemSave_Click(sender,e);
needToSave=false;
}
}
string file=GetOpenFile();
if(file==null)
{
return;
}
else
{
currentFileName=file;
OpenFile();
}
}
private void OpenFile()
{
try
{
FileInfo f=new FileInfo(currentFileName);
StreamReader reader=f.OpenText();
textBoxEdit.Text=reader.ReadToEnd();
reader.Close();
this.Text="文本编辑--"+f.Name;
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
}
private string GetOpenFile()
{
OpenFileDialog openFile=new OpenFileDialog();
openFile.Title="打开文本文件";
openFile.CheckFileExists=true;
openFile.CheckPathExists=true;
openFile.AddExtension=true;
openFile.Multiselect=false;
openFile.Filter="文本文件 (*.txt)|*.txt|所有文件 (*.*)|*.*";
if(openFile.ShowDialog()==DialogResult.OK)
{
return openFile.FileName;
}
else
{
return null;
}
}
private void menuItemExit_Click(object sender, System.EventArgs e)
{
this.Close();
}
private void menuItemUndo_Click(object sender, System.EventArgs e)
{
if(textBoxEdit.CanUndo==true)
{
textBoxEdit.Undo();
textBoxEdit.ClearUndo();
}
}
private void menuItemCut_Click(object sender, System.EventArgs e)
{
if(textBoxEdit.SelectedText!="")
{
textBoxEdit.Cut();
}
}
private void menuItemCopy_Click(object sender, System.EventArgs e)
{
if(textBoxEdit.SelectionLength>0)
{
textBoxEdit.Copy();
}
}
private void menuItemPaste_Click(object sender, System.EventArgs e)
{
if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text)==true)
{
if(textBoxEdit.SelectionLength>0)
{
DialogResult result;
result=MessageBox.Show("你想覆盖掉选择的文本吗?","覆盖确认",MessageBoxButtons.YesNo);
if(result==DialogResult.No)
{
textBoxEdit.SelectionStart=textBoxEdit.SelectionStart+textBoxEdit.SelectionLength;
}
}
textBoxEdit.Paste();
}
}
private void menuItemDel_Click(object sender, System.EventArgs e)
{
textBoxEdit.SelectedText.Remove(0,textBoxEdit.SelectionLength);
textBoxEdit.SelectedText="";
}
private void menuItemSelAll_Click(object sender, System.EventArgs e)
{
textBoxEdit.SelectAll();
}
private void menuItemEdit_Popup(object sender, System.EventArgs e)
{
if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text))
{
menuItemPaste.Enabled=true;
}
else
{
menuItemPaste.Enabled=false;
}
if(textBoxEdit.SelectionLength>0)
{
menuItemCopy.Enabled=true;
menuItemCut.Enabled=true;
menuItemDel.Enabled=true;
}
else
{
menuItemCopy.Enabled=false;
menuItemCut.Enabled=false;
menuItemDel.Enabled=false;
}
if(textBoxEdit.CanUndo==true)
{
menuItemUndo.Enabled=true;
}
else
{
menuItemUndo.Enabled=false;
}
}
private void menuItemSave_Click(object sender, System.EventArgs e)
{
if(currentFileName==null)
{
menuItemSaveAs_Click(sender,e);
}
else
{
SaveFile(textBoxEdit.Text);
}
needToSave=false;
}
private void menuItemSaveAs_Click(object sender, System.EventArgs e)
{
string file=GetSaveFile();
if(file==null)
{
return;
}
else
{
currentFileName=file;
SaveFile(textBoxEdit.Text);
FileInfo f=new FileInfo(currentFileName);
this.Text="文本编辑--"+f.Name;
needToSave=false;
}
}
private void SaveFile(string str)
{
try
{
StreamWriter writer=new StreamWriter(currentFileName);
writer.Write(str);
writer.Close();
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
}
private string GetSaveFile()
{
SaveFileDialog saveFile=new SaveFileDialog();
saveFile.Title="保存文本文件";
saveFile.OverwritePrompt=true;
saveFile.CreatePrompt=true;
saveFile.AddExtension=true;
saveFile.Filter="文本文件 (*.txt)|*.txt|所有文件 (*.*)|*.*";
if(saveFile.ShowDialog()==DialogResult.OK)
{
return saveFile.FileName;
}
else
{
return null;
}
}
private void menuItemFont_Click(object sender, System.EventArgs e)
{
FontDialog fontDialog=new FontDialog();
fontDialog.ShowColor=true;
fontDialog.AllowScriptChange=true;
fontDialog.AllowVectorFonts=true;
fontDialog.ShowEffects=true;
if(fontDialog.ShowDialog()==DialogResult.OK)
{
textBoxEdit.Font=fontDialog.Font;
textBoxEdit.ForeColor=fontDialog.Color;
}
}
private void menuItemColor_Click(object sender, System.EventArgs e)
{
ColorDialog colorDialog=new ColorDialog();
colorDialog.AllowFullOpen=true;
colorDialog.AnyColor=true;
colorDialog.FullOpen=true;
if(colorDialog.ShowDialog()==DialogResult.OK)
{
textBoxEdit.BackColor=colorDialog.Color;
}
}
private void menuItemPrint_Click(object sender, System.EventArgs e)
{
PrintDialog printDialog=new PrintDialog();
printDialog.Document=printDocument;
if(printDialog.ShowDialog()==DialogResult.OK)
{
try
{
printDocument.Print();
}
catch(Exception e2)
{
MessageBox.Show(e2.Message);
}
}
}
private void printDocument_PrintPage(object sender,PrintPageEventArgs e)
{
float linesPerPage=0;
float yPos=0;
int count=0;
float leftMargin=e.MarginBounds.Left;
float topMargin=e.MarginBounds.Top;
string line=null;
StreamReader streamToPrint=new StreamReader(currentFileName);
SolidBrush brush=new SolidBrush(textBoxEdit.ForeColor);
linesPerPage=e.MarginBounds.Height/textBoxEdit.Font.GetHeight(e.Graphics);
while(count<linesPerPage&&((line=streamToPrint.ReadLine())!=null))
{
yPos=topMargin+(count*textBoxEdit.Font.GetHeight(e.Graphics));
e.Graphics.DrawString(line,textBoxEdit.Font,brush,leftMargin,yPos,new StringFormat());
count++;
}
if(line!=null)
{
e.HasMorePages=true;
}
else
{
e.HasMorePages=false;
}
}
private void menuItemPageSet_Click(object sender, System.EventArgs e)
{
PageSetupDialog pageSet=new PageSetupDialog();
pageSet.Document=printDocument;
pageSet.ShowDialog();
}
private void FormMain_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
if(needToSave==true)
{
DialogResult result=MessageBox.Show("文本内容已经改变,需要保存吗?","保存文件",MessageBoxButtons.YesNoCancel,MessageBoxIcon.Question);
if(result==DialogResult.Cancel)
{
e.Cancel=true;
return;
}
if(result==DialogResult.Yes)
{
menuItemSave_Click(sender,e);
e.Cancel=false;
return;
}
}
}
private void menuItemNew_Click(object sender, System.EventArgs e)
{
if(needToSave==true)
{
DialogResult result=MessageBox.Show("文本内容已经改变,需要保存吗?","保存文件",MessageBoxButtons.YesNoCancel,MessageBoxIcon.Question);
switch(result)
{
case DialogResult.Yes:
{
menuItemSave_Click(sender,e);
textBoxEdit.Clear();
this.Text="文本编辑--新建文本";
needToSave=false;
break;
}
case DialogResult.No:
{
textBoxEdit.Clear();
this.Text="文本编辑--新建文本";
needToSave=false;
break;
}
case DialogResult.Cancel:
{
break;
}
}
}
else
{
textBoxEdit.Clear();
this.Text="文本编辑新建文本";
}
}
}
}
(四).代码示例下载
