(c#)一个简单的TXT阅读器_沉城

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(c#)一个简单的TXT阅读器

(2013-05-22 17:15:03)

标签：

阅读器

csharp

消除乱码

抓屏

模拟功能键

分类： C#笔记

(c#) 一个简单的TXT阅读器

*功能：简单TXT阅读器

* 调整字体或界面大小时，自动计算总页数与当前页数（以当前界面大小为一页，以方便阅读）

* 要点：

* 1）读取TEXT文件并在TextBox中显示

* 2）消除汉字乱码

* 3）计算总页数，当前页数

* 3）按下按钮时，发送键码（用按钮模拟PGUP,PGDN功能键）

* 4）程序运行中如何变更字体（需用fontFamily类）

* 5）打开文件OpenFileDialog,保存文件SaveFileDialog

* 6）抓屏

* 7）菜单项的Checked

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 ShowReader

{

public partial class MainForm : Form

{

// int CurrentLine;

int WordIndex;

public MainForm()

{

InitializeComponent();

this.BackgroundImageLayout = ImageLayout.Stretch;

this.KeyPreview = true;

this.labelTitle.Visible = false;

this.textBox1.Visible = false;

this.textBox1.Text = "";

this.panel_bottom.Visible = false;

this.textBox1.BackColor = System.Drawing.Color.White;

}

private void FileOpenMenuItem_Click(object sender, EventArgs e)

{

OpenFileDialog fileDialog = new OpenFileDialog();

// fileDialog.InitialDirectory = "d:\";

fileDialog.Title = "选择文件";

fileDialog.Filter = "TXT files (*.txt)|*.txt";

fileDialog.FilterIndex = 1;

fileDialog.RestoreDirectory = true;

if (fileDialog.ShowDialog() == DialogResult.OK)

{

labelTitle.Visible = true;

panel_bottom.Visible = true;

textCurrentPage.Text = "1";

this.textBox1.Visible = true;

// this.textBox1.ScrollBars.GetType();

FileStream fs = new FileStream(fileDialog.FileName, FileMode.Open, FileAccess.Read);

StreamReader sr = new StreamReader(fs, Encoding.Default); //注意第二个参数，若无，汉字会成乱码

string input = sr.ReadToEnd();

this.textBox1.Focus();

textBox1.Text = input;

// string str = new string();

if (fileDialog.FileName.LastIndexOf(".") - fileDialog.FileName.LastIndexOf("\") - 1 > 0 & fileDialog.FileName.LastIndexOf("\") + 1 > 1)

{

fileDialog.FileName = fileDialog.FileName.Substring(fileDialog.FileName.LastIndexOf("\") + 1, (fileDialog.FileName.LastIndexOf(".") - fileDialog.FileName.LastIndexOf("\") - 1));

}

labelTitle.Text = fileDialog.FileName;

SetLabelTitleLeft();

getPages();

getCurrentPage();

}

private void MainForm_Resize(object sender, EventArgs e)

{

this.panel_bottom.Height = 50;

this.textBox1.Top = 40;

this.textBox1.Left = 10;

this.textBox1.Width = this.Width - 38;

this.textBox1.Height = this.Height - 80 - this.panel_bottom.Height;

this.panel_bottom.Top = this.textBox1.Top + this.textBox1.Height + 10;

this.panel_bottom.Left = 0;

this.panel_bottom.Width = this.Width;

this.panel_Button.Left = this.Width - this.panel_Button.Width;

SetLabelTitleLeft();

// foreach (Control ctl in this.panel_right.Controls)

// {

// ctl.Left = -1;

// ctl.Height = this.textBox1.Height / 10 + 2;

// ctl.Width = ctl.Parent.Width;

// ctl.Enabled = false;

// }

// for (int i = 0; i < this.panel_right.Controls.Count; i++)

// {

// this.panel_right.Controls[i].Text = Convert.ToString(i + 1);

// this.panel_right.Controls[i].Top = (this.textBox1.Top - this.panel_right.Top) + (i) * this.textBox1.Height / 10;

// }

getPages();

}

public void getPages()

{

int myPages = (textBox1.GetLineFromCharIndex(textBox1.Text.Length) + 1) / ((this.textBox1.Height / this.textBox1.Font.Height) - 0) + 1;

textPages.Text = Convert.ToString(myPages);

}

public void getCurrentPage()

{

WordIndex = textBox1.GetFirstCharIndexOfCurrentLine();//得到当前行第一个字符的索引

int CurrentLine = textBox1.GetLineFromCharIndex(WordIndex) + 1;//得到当前行的行号,从0开始，习惯是从1开始，所以+1.

int CurrentPage = CurrentLine / (this.textBox1.Height / this.textBox1.Font.Height) + 1;

if (CurrentPage > Convert.ToInt32(textPages.Text))

{

CurrentPage = Convert.ToInt32(textPages.Text);

}

textCurrentPage.Text = Convert.ToString(CurrentPage);

}

private void FileCloseMenuItem_Click(object sender, EventArgs e)

{

this.textBox1.Text = "";

this.textBox1.Visible = false;

this.panel_bottom.Visible = false;

this.labelTitle.Visible = false;

}

private void SetFont01MenuItem_Click(object sender, EventArgs e)

{

//公共构造函数 FontFamily 已重载

FontFamily fontFamily = new FontFamily("微软雅黑");//字体为黑体

textBox1.Font = new Font(

fontFamily,

16,//字号为16

FontStyle.Regular,//普通文本

//Bold 为加粗

//Italic 为倾斜

//Strikeout 带删除线

//Underline 带下划线

GraphicsUnit.Pixel); //指定给定数据的度量单位。

//成员说明：

//Display 指定显示设备的度量单位。通常，视频显示使用的单位是像素；

//打印机使用的单位是 1/100 英寸。

//Document 将文档单位（1/300 英寸）指定为度量单位。

//Inch 将英寸指定为度量单位。

//Millimeter 将毫米指定为度量单位。

//Pixel 将设备像素指定为度量单位。

//Point 将打印机点（1/72 英寸）指定为度量单位。

//World 将世界坐标系单位指定为度量单位。

SetFont01MenuItem.Checked = true;

SetFont02MenuItem.Checked = false;

SetFont03MenuItem.Checked = false;

SetFont04MenuItem.Checked = false;

getPages();

getCurrentPage();

}

private void SetFont02MenuItem_Click(object sender, EventArgs e)

{

//公共构造函数 FontFamily 已重载

FontFamily fontFamily = new FontFamily("微软雅黑");//字体为黑体

textBox1.Font = new Font(

fontFamily,

19,//字号

FontStyle.Regular,//普通文本

GraphicsUnit.Pixel); //指定给定数据的度量单位。

SetFont01MenuItem.Checked = false;

SetFont02MenuItem.Checked = true;

SetFont03MenuItem.Checked = false;

SetFont04MenuItem.Checked = false;

getPages();

getCurrentPage();

}

private void SetFont03MenuItem_Click(object sender, EventArgs e)

{

FontFamily fontFamily = new FontFamily("微软雅黑");//字体为黑体

textBox1.Font = new Font(

fontFamily,

24,//字号

FontStyle.Regular,//普通文本

GraphicsUnit.Pixel); //指定给定数据的度量单位。

SetFont01MenuItem.Checked = false;

SetFont02MenuItem.Checked = false;

SetFont03MenuItem.Checked = true;

SetFont04MenuItem.Checked = false;

getPages();

getCurrentPage();

}

private void SetFont04MenuItem_Click(object sender, EventArgs e)

{

FontFamily fontFamily = new FontFamily("微软雅黑");//字体为黑体

textBox1.Font = new Font(

fontFamily,

30,//字号

FontStyle.Regular,//普通文本

GraphicsUnit.Pixel); //

SetFont01MenuItem.Checked = false;

SetFont02MenuItem.Checked = false;

SetFont03MenuItem.Checked = false;

SetFont04MenuItem.Checked = true;

getPages();

getCurrentPage();

}

private void MainForm_KeyDown(object sender, KeyEventArgs e)//不用此事件

{

}

private void textBox1_KeyDown(object sender, KeyEventArgs e)

{

Int32 p = Convert.ToInt32(this.textCurrentPage.Text);

if (Keys.PageDown == e.KeyCode)

{

if (p < Convert.ToInt32(this.textPages.Text))

{

this.textCurrentPage.Text = Convert.ToString(p +1);

}

if (Keys.PageUp == e.KeyCode)

{

if (p > 1 )

{

this.textCurrentPage.Text = Convert.ToString(p -1);

}

// this.my_p.Visible = false;

// this.textCurrentPage.Refresh();

// MessageBox.Show("您所按动的键是");

}

private void button3_Click(object sender, EventArgs e)

{

textBox1.Focus();

SendKeys.Send("{PGUP}");

}

private void button4_Click(object sender, EventArgs e)

{

textBox1.Focus();

SendKeys.Send("{PGDN}");

}

private void button1_Click(object sender, EventArgs e)

{

this.textBox1.SelectionStart = 1;

this.textBox1.ScrollToCaret();

getCurrentPage();

}

private void button6_Click(object sender, EventArgs e)

{

this.textBox1.SelectionStart = textBox1.Text.Length;

this.textBox1.ScrollToCaret();

getCurrentPage();

}

private void button2_Click(object sender, EventArgs e)

{

WordIndex = WordIndex - 5 * (this.textBox1.Height / this.textBox1.Font.Height) *(this.textBox1.Width/ this.textBox1.Font.Height);

if (WordIndex < 1)

{

WordIndex = 1;

}

this.textBox1.SelectionStart = WordIndex;

this.textBox1.ScrollToCaret();

getCurrentPage();

}

private void button5_Click(object sender, EventArgs e)

{

WordIndex = WordIndex + 5 * (this.textBox1.Height / this.textBox1.Font.Height) *(this.textBox1.Width/ this.textBox1.Font.Height);

if (WordIndex > textBox1.Text.Length)

{

WordIndex = textBox1.Text.Length;

}

this.textBox1.SelectionStart = WordIndex;

this.textBox1.ScrollToCaret();

getCurrentPage();

}

private void textBox1_MouseClick(object sender, MouseEventArgs e)

{

getCurrentPage();

}

private void SetBackground01MenuItem_Click(object sender, EventArgs e)

{

this.BackgroundImage = Properties.Resources._11;