C#界面设计之文本阅读器的设计

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.IO;

namespace MultiTextReader
{
public partial class FrmReader : Form
{
public FrmReader(string fileName)
{
this._FileName = fileName;              //更新当前打开文件的文件名
InitializeComponent( );
}
//表示当前子窗体所打开文件的文件名
private string _FileName;
//窗体加载时显示加载并显示文件内容
private void FrmReader_Load(object sender, EventArgs e)
{
this.Text = this._FileName;             //设置当前窗体的标题
StreamReader sr;                        //文件流对象sr
sr = new StreamReader(this._FileName, Encoding.Default);    //打开指定文件
while (!sr.EndOfStream)                 //如果文件没有读取完成继续读取
{
string line = sr.ReadLine( );       //从文件读取一行
this.tbTexts.AppendText(line);      //显示文件数据到文本框
this.tbTexts.AppendText(System.Environment.NewLine);
}
sr.Close( );                            //关闭文件
}

public void SetViewSettings(Color bkColor, Color freColor, Font fnt)
{
this.tbTexts.BackColor = bkColor;
this.tbTexts.ForeColor = freColor;
this.tbTexts.Font = fnt;
}
}
}

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 MultiTextReader
{
public partial class FrmMain : Form
{
private int childFormNumber = 0;

public FrmMain( )
{
InitializeComponent( );
}

private void ShowNewForm(object sender, EventArgs e)
{
Form childForm = new Form( );
childForm.MdiParent = this;
childForm.Text = "窗口 " + childFormNumber++;
childForm.Show( );
}

private void OpenFile(object sender, EventArgs e)
{
OpenFileDialog ofdlg = new OpenFileDialog( );       //创建OpenFileDialog对象ofdlg
//设置打开文件对话框的默认路径为“我的文档”
ofdlg.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
ofdlg.Filter = "文本文件(*.txt)|*.txt";            //设置只接受txt为扩展名的文件
if (ofdlg.ShowDialog(this) == DialogResult.OK)      //显示打开文件对话框
{
string fileName = ofdlg.FileName;               //获取要打开的文件名
FrmReader frm = new FrmReader(fileName);        //创建查看文件的子窗体frm
frm.MdiParent = this;                           //设置子窗体frm的父窗体为当前窗体
frm.Show( );                                    //显示子窗体
}
}

private void SaveAsToolStripMenuItem_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog = new SaveFileDialog( );
saveFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
saveFileDialog.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";
if (saveFileDialog.ShowDialog(this) == DialogResult.OK)
{
string FileName = saveFileDialog.FileName;
}
}

private void ExitToolsStripMenuItem_Click(object sender, EventArgs e)
{
this.Close( );
}

private void CutToolStripMenuItem_Click(object sender, EventArgs e)
{
}

private void CopyToolStripMenuItem_Click(object sender, EventArgs e)
{
}

private void PasteToolStripMenuItem_Click(object sender, EventArgs e)
{
}

private void ToolBarToolStripMenuItem_Click(object sender, EventArgs e)
{
toolStrip.Visible = toolBarToolStripMenuItem.Checked;
}

private void StatusBarToolStripMenuItem_Click(object sender, EventArgs e)
{
statusStrip.Visible = statusBarToolStripMenuItem.Checked;
}

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

private void TileVerticalToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.TileVertical);
}

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

private void ArrangeIconsToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.ArrangeIcons);
}

private void CloseAllToolStripMenuItem_Click(object sender, EventArgs e)
{
foreach (Form childForm in MdiChildren)
{
childForm.Close( );
}
}

private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
AboutBox dlg = new AboutBox( );
dlg.ShowDialog(this);
}

private Color _ViewBackColor = Color.White;             //阅读的背景色字段及默认值
private Color _ViewForeColor = Color.Black;             //阅读的前景色字段及默认值
private Font _ViewFont = SystemFonts.DefaultFont;       //阅读的字体字段及默认值
//"选项"菜单处理函数，打开SettingDlg，并将新参数更新到已打开的子窗体
private void optionsToolStripMenuItem_Click(object sender, EventArgs e)
{
SettingDlg dlg = new SettingDlg(this._ViewBackColor,    //用当前阅读参数创建SettingDlg对象dlg
this._ViewForeColor,
this._ViewFont);
if (dlg.ShowDialog(this) == DialogResult.OK)            //显示参数设置对话框，并等待用户设置
{
this._ViewBackColor = dlg.GetBackColor( );          //获取用户最新的阅读参数
this._ViewFont = dlg.GetFont( );
this._ViewForeColor = dlg.GetForeColor( );
foreach (Form frm in this.MdiChildren)              //遍历所有子窗体
{
FrmReader frmRd = frm as FrmReader;             //如果子窗体是FrmReader类型
if (frmRd != null)                              //则更新最新参数到子窗体
{
frmRd.SetViewSettings(this._ViewBackColor, this._ViewForeColor, this._ViewFont);
}
}
}
}

}
}