C# RichTextBox制作文本編輯器。本站提示廣大學習愛好者：（C# RichTextBox制作文本編輯器）文章只能為提供參考，不一定能成為您想要的結果。以下是C# RichTextBox制作文本編輯器正文
本文利用一個簡單的小例子【文本編輯器】，講解RichTextBox的用法。
Windows窗體中的RichTextBox控件用於顯示，輸入和操作格式化的文本，RichTextBox除了擁有TextBox控件的所有功能外，還可以顯示字體，顏色，鏈接，從文件中讀取和加載圖像，以及查找指定的字符。RichTextBox控件通常用於提供類似字體處理程序（如Microsoft Word）的文本操作和顯示功能。RichTextBox控件可以顯示滾動條，且默認根據需要進行顯示。
涉及知識點：
SelectionFont 獲取或設置當前選定文本或插入點的字體。 FontStyle 指定應用到文本的字形信息。 SelectionAlignment 獲取或設置應用到當前選定內容或插入點的對齊方式。 SelectionIndent 獲取或設置所選內容開始行的縮進距離（以像素為單位）。 SelectionCharOffset 獲取或設置控件中的文本是顯示在基線上、作為上標還是作為基線下方的下標。 SelectionColor 獲取或設置當前選定文本或插入點的文本顏色。 SelectionBackColor 獲取或設置在 System.Windows.Forms.RichTextBox 控件中選中文本時文本的顏色。 SelectionBullet 獲取或設置一個值，通過該值指示項目符號樣式是否應用到當前選定內容或插入點。 Clipboard Paste 粘貼指定剪貼板格式的剪貼板內容【插入圖片時使用】。 Find 在對搜索應用特定選項的情況下，在 System.Windows.Forms.RichTextBox 控件的文本中搜索位於控件內特定位置的字符串。效果圖如下【以下設置文本對應的格式】：
核心代碼如下
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Printing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace DemoRichText.Model
{
public class DefaultRickFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
}
}
/// <summary>
/// 加粗格式
/// </summary>
public class BoldRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
Font oldFont = rtbInfo.SelectionFont;
Font newFont;
if (oldFont.Bold)
{
newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold);//支持位於運算
}
else
{
newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);
}
rtbInfo.SelectionFont = newFont;
}
}
/// <summary>
/// 斜體
/// </summary>
public class ItalicRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
Font oldFont = rtbInfo.SelectionFont;
Font newFont;
if (oldFont.Italic)
{
newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Italic);
}
else
{
newFont = new Font(oldFont, oldFont.Style | FontStyle.Italic);
}
rtbInfo.SelectionFont = newFont;
rtbInfo.Focus();
}
}
/// <summary>
/// 下劃線
/// </summary>
public class UnderLineRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
Font oldFont = rtbInfo.SelectionFont;
Font newFont;
if (oldFont.Underline)
{
newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Underline);
}
else
{
newFont = new Font(oldFont, oldFont.Style | FontStyle.Underline);
}
rtbInfo.SelectionFont = newFont;
rtbInfo.Focus();
}
}
/// <summary>
/// 刪除線
/// </summary>
public class StrikeLineRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
Font oldFont = rtbInfo.SelectionFont;
Font newFont;
if (oldFont.Underline)
{
newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Strikeout);
}
else
{
newFont = new Font(oldFont, oldFont.Style | FontStyle.Strikeout);
}
rtbInfo.SelectionFont = newFont;
rtbInfo.Focus();
}
}
/// <summary>
/// 左對齊
/// </summary>
public class LeftRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
rtbInfo.SelectionAlignment = HorizontalAlignment.Left;
rtbInfo.Focus();
}
}
/// <summary>
/// 居中對齊
/// </summary>
public class CenterRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
if (rtbInfo.SelectionAlignment == HorizontalAlignment.Center)
{
rtbInfo.SelectionAlignment = HorizontalAlignment.Left;
}
else
{
rtbInfo.SelectionAlignment = HorizontalAlignment.Center;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 右對齊
/// </summary>
public class RightRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
if (rtbInfo.SelectionAlignment == HorizontalAlignment.Right)
{
rtbInfo.SelectionAlignment = HorizontalAlignment.Left;
}
else
{
rtbInfo.SelectionAlignment = HorizontalAlignment.Right;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 縮進對齊
/// </summary>
public class IndentRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
//每次以10個像素進行縮進
rtbInfo.SelectionIndent = rtbInfo.SelectionIndent + 10;
rtbInfo.Focus();
}
}
/// <summary>
/// 縮進對齊
/// </summary>
public class OutIndentRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
//每次以10個像素進行縮進
rtbInfo.SelectionIndent = rtbInfo.SelectionIndent - 10;
rtbInfo.Focus();
}
}
/// <summary>
/// 下標
/// </summary>
public class SubScriptRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
if (rtbInfo.SelectionCharOffset < 0)
{
rtbInfo.SelectionCharOffset = 0;
}
else {
rtbInfo.SelectionCharOffset = -5;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 上標
/// </summary>
public class SuperScriptRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
if (rtbInfo.SelectionCharOffset > 0)
{
rtbInfo.SelectionCharOffset = 0;
}
else {
rtbInfo.SelectionCharOffset = 5;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 字體
/// </summary>
public class FontRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
FontDialog f = new FontDialog();
if (f.ShowDialog() == DialogResult.OK)
{
FontFamily family = f.Font.FontFamily;
rtbInfo.SelectionFont = new Font(family, rtbInfo.SelectionFont.Size, rtbInfo.SelectionFont.Style);
}
rtbInfo.Focus();
}
}
/// <summary>
/// 文本顏色
/// </summary>
public class ForeColorRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
ColorDialog f = new ColorDialog();
if (f.ShowDialog() == DialogResult.OK)
{
rtbInfo.SelectionColor = f.Color;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 文本背景顏色
/// </summary>
public class BgColorRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
ColorDialog f = new ColorDialog();
if (f.ShowDialog() == DialogResult.OK)
{
rtbInfo.SelectionBackColor = f.Color;
}
rtbInfo.Focus();
}
}
/// <summary>
/// UL列表,項目符號樣式
/// </summary>
public class UlRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
if (rtbInfo.SelectionBullet)
{
rtbInfo.SelectionBullet = false;
}
else {
rtbInfo.SelectionBullet = true;
rtbInfo.BulletIndent = 10;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 圖片插入
/// </summary>
public class PicRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
OpenFileDialog o = new OpenFileDialog();
o.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory;
o.Title = "請選擇圖片";
o.Filter = "jpeg|*.jpeg|jpg|*.jpg|png|*.png|gif|*.gif";
if (o.ShowDialog() == DialogResult.OK) {
string fileName = o.FileName;
try
{
Image bmp = Image.FromFile(fileName);
Clipboard.SetDataObject(bmp);
DataFormats.Format dataFormat = DataFormats.GetFormat(DataFormats.Bitmap);
if (rtbInfo.CanPaste(dataFormat))
{
rtbInfo.Paste(dataFormat);
}
}
catch (Exception exc)
{
MessageBox.Show("圖片插入失敗。" + exc.Message, "提示",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
rtbInfo.Focus();
}
}
/// <summary>
/// 刪除
/// </summary>
public class DelRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
rtbInfo.SelectedText = "";
rtbInfo.Focus();
}
}
/// <summary>
/// 查找
/// </summary>
public class SearchRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
string find = rtbInfo.Tag.ToString();
int index= rtbInfo.Find(find, 0,RichTextBoxFinds.None);
int startPos = index;
int nextIndex = 0;
while (nextIndex != startPos)//循環查找字符串，並用藍色加粗12號Times New Roman標記之
{
rtbInfo.SelectionStart = index;
rtbInfo.SelectionLength = find.Length;
rtbInfo.SelectionColor = Color.Blue;
rtbInfo.SelectionFont = new Font("Times New Roman", (float)12, FontStyle.Bold);
rtbInfo.Focus();
nextIndex = rtbInfo.Find(find, index + find.Length, RichTextBoxFinds.None);
if (nextIndex == -1)//若查到文件末尾，則充值nextIndex為初始位置的值，使其達到初始位置，順利結束循環，否則會有異常。
{
nextIndex = startPos;
}
index = nextIndex;
}
rtbInfo.Focus();
}
}
/// <summary>
/// 打印
/// </summary>
public class PrintRichFormat : BaseRichFormat
{
private RichTextBox richTextbox;
public override void SetFormat(RichTextBox rtbInfo)
{
this.richTextbox = rtbInfo;
PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
// 打印文檔
pd.Print();
}
private void pd_PrintPage(object sender, PrintPageEventArgs ev)
{
//ev.Graphics.DrawString(richTextbox.Text);
//ev.HasMorePages = true;
}
}
/// <summary>
/// 字體大小
/// </summary>
public class FontSizeRichFormat : BaseRichFormat
{
public override void SetFormat(RichTextBox rtbInfo)
{
string fontSize = rtbInfo.Tag.ToString();
float fsize = 0.0f;
if (float.TryParse(fontSize, out fsize)) {
rtbInfo.SelectionFont = new Font(rtbInfo.Font.FontFamily, fsize, rtbInfo.SelectionFont.Style);
}
rtbInfo.Focus();
}
}
}
頁面代碼【由於實現了代碼封裝，所有頁面代碼較少】
using DemoRichText.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace DemoRichText
{
public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();
}
public void btnButtonClick(object sender, EventArgs e) {
Button btn = (Button)sender;
BTNType btnType;
if (Enum.TryParse<BTNType>(btn.Tag.ToString(), out btnType)) {
if (btnType == BTNType.Search) {
if (!string.IsNullOrEmpty(this.txtSearch.Text.Trim()))
{
this.rtbInfo.Tag = this.txtSearch.Text.Trim();
}
else {
return;
}
}
IRichFormat richFomat = RichFormatFactory.CreateRichFormat(btnType);
richFomat.SetFormat(this.rtbInfo);
}
}
private void combFontSize_SelectedIndexChanged(object sender, EventArgs e)
{
float fsize = 12.0f;
if (combFontSize.SelectedIndex > -1) {
if (float.TryParse(combFontSize.SelectedItem.ToString(), out fsize)) {
rtbInfo.Tag = fsize.ToString();
IRichFormat richFomat = RichFormatFactory.CreateRichFormat(BTNType.FontSize);
richFomat.SetFormat(this.rtbInfo);
}
return;
}
}
}
}
RichTextBox是一個功能豐富的控件，值得學習。
點擊文末原文地址下載源碼。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持。
