这篇文章主要为大家详细介绍了C#实现记事本查找与替换功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
看了网上关于记事本的查找替换很多，但都没有达到我想要的结果，然后自己学习总结了以下的方法：
统计字符串(汉字,字母,数字,字符)
先上效果图
定义全局变量
#region =★*★*★= 〖查找替换〗的自定义变量 =★*★*★=
/// <summary> 获取或设置查找起始位置 </summary>
static int Index = 0;
/// <summary> 查找到的字符串数量 </summary>
static int count = 0;
/// <summary> 查找字符是否变更
static string strE = string.Empty;
/// <summary> 记录原始光标位置 </summary>
static int MemoIndex = -1;
/// <summary> 过度字符串变量 </summary>
static string str = string.Empty;
/// <summary> 实例化富文本 </summary>
static RichTextBox r = new RichTextBox();
#endregion向上查找
#region =★*★*★= FindUp() 查找指定〖字符 或 字符串〗 =★*★*★=
/// <summary>向上查找指定〖字符 或 字符串〗(不区分大小写)<para> <para>
/// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型<para>
/// 参数2(str):用户指定要查找的字符串</para>
/// </para></para> </summary>
/// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>
/// <param name="str">用户指定要查找的字符串</param>
public static void FindUp(RichTextBox rtxt, string str)
{
if (strE != str)
{
rtxt.SelectionStart = rtxt.Text.Length;
strE = str;
}
Index = rtxt.SelectionStart;
Index = rtxt.Find(str, 0, Index, RichTextBoxFinds.Reverse);
if (Index >= 0)
{
rtxt.SelectionStart = Index;
rtxt.SelectionLength = str.Length;
count++;
rtxt.Focus();
myColor(rtxt);//设定关键字为颜色
if (Index <= 0)
{
seeks(str);
count = 0;
}
}
else if (Index < 0)
{
seeks(str);
count = 0;
}
}
#endregion向下查找
#region =★*★*★= FindDown() 查找指定〖字符 或 字符串〗=★*★*★=
/// <summary>向下 查找指定〖字符 或 字符串〗<para> </para>
/// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型 <para></para>
/// 参数2(FindStr):用户指定要查找的字符串<para></para>
/// 参数3(TrueFales):bool 真:限定大小写 假:不分大小写</summary>
/// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>
/// <param name="FindStr">用户指定要查找的字符串</param>
/// <param name="TrueFales">bool 真:限定大小写 假:不分大小写</param>
public static void FindDown(RichTextBox rtxt, string FindStr,bool TrueFales)
{
if (TrueFales)
fileFindDownMax(rtxt, FindStr);
else
fileFindDownMin(rtxt, FindStr);
}
#endregion
#region =★*★*★= 简单的从上到下查找 =★*★*★=
/// <summary>向下查找指定〖字符 或 字符串〗(限定大小写)<para> <para>
/// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型
/// <para>参数2(FindStr):用户指定要查找的字符串</para>
/// </para></para> </summary>
/// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>
/// <param name="FindStr">用户指定要查找的字符串</param>
private static void FindDownmax(RichTextBox rtxt, string FindStr)
{
Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.MatchCase);
if (Index < 0 || Index > rtxt.Text.Length)
{
seeks(FindStr);
count = 0;
Index = 0;
}
else
{
rtxt.Select(Index, FindStr.Length);
myColor(rtxt);//设定关键字为颜色
Index += FindStr.Length;
rtxt.Focus();
}
}
/// <summary>向下查找指定〖字符 或 字符串〗(不区分大小写)<para> <para>
/// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型
/// <para>参数2(FindStr):用户指定要查找的字符串</para>
/// </para></para> </summary>
/// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>
/// <param name="FindStr">用户指定要查找的字符串</param>
private static void FindDownMin(RichTextBox rtxt, string FindStr)
{
Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.None);
if (Index < 0 || Index > rtxt.Text.Length)
{
seeks(FindStr);
count = 0;
Index = 0;
}
else
{
rtxt.Select(Index, FindStr.Length);
myColor(rtxt);//设定关键字为颜色
Index += FindStr.Length;
rtxt.Focus();
}
}
#endregion
//* 类似 VS 的查找方法 */
#region =★*★*★= 类似 VS 的查找方法 =★*★*★=
/// <summary> 类似 VS 的查找方法(不区分大小写向下查找)<para> </para>
/// 参数1(txt):RichTextBox文本框<para></para>
/// 参数2(FindString):查找字符串</summary>
/// <param name="txt">RichTextBox文本框</param>
/// <param name="FindString">查找字符串</param>
private static void fileFindDownMax(RichTextBox rtxt, string FindString)
{
if (MemoIndex < 0)
{
MemoIndex = rtxt.SelectionStart;
if (MemoIndex > 10 && MemoIndex + FindString.Length <= rtxt.Text.Length)
{
str = rtxt.Text.Substring(0, MemoIndex + FindString.Length - 1);//截取光标位置 + 查找字符数 - 1 位数
Index = rtxt.SelectionStart;
r.Text = str;
}
else
{
str = rtxt.Text;
r.Text = rtxt.Text;
Index = rtxt.SelectionStart;
}
}
if (Index < str.Length - (FindString.Length - 1) && Index >= 0)
{
Index = r.Find(FindString, Index, RichTextBoxFinds.None);
if (Index < 0 || Index > r.Text.Length)
{
seeks(FindString);
count = 0;
Index = 0;
MemoIndex = -1;
}
else
{
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
count++;
Index += FindString.Length;
if (Index > str.Length - FindString.Length)
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
else if (Index < rtxt.Text.Length && Index >= 0)
{
Index = rtxt.Find(FindString, Index, RichTextBoxFinds.None);
if (Index == -1)//(Index >= txt.Text.Length && Index <= 0)
{
if (r.Text != "")
{
Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.None);
if (Index < 0 || Index > r.Text.Length)
{
seeks(FindString);
count = 0;
Index = 0;
MemoIndex = -1;
}
else
{
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
Index += FindString.Length;
count++;
if (Index > str.Length - FindString.Length)
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
else
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
else
{
rtxt.Select(Index, FindString.Length);//在RichTextBox控件中搜索关键字
Index += FindString.Length;//递增标识查询关键字的初始长度
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
count++;
}
}
else
{
Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.None);
if (Index < r.Text.Length - FindString.Length && Index >= 0)
{
r.Select(Index, FindString.Length);
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
Index += FindString.Length;//递增标识查询关键字的初始长度
rtxt.Focus();
count++;
}
else
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
/// <summary> 类似 VS 的查找方法(不区分大小写向下查找)<para> </para>
/// 参数1(txt):RichTextBox文本框<para></para>
/// 参数2(FindString):查找字符串</summary>
/// <param name="txt">RichTextBox文本框</param>
/// <param name="FindString">查找字符串</param>
private static void fileFindDownMin(RichTextBox rtxt, string FindString)
{
if (MemoIndex < 0)
{
MemoIndex = rtxt.SelectionStart;
if (MemoIndex > 10 && MemoIndex + FindString.Length <= rtxt.Text.Length)
{
str = rtxt.Text.Substring(0, MemoIndex + FindString.Length - 1);
Index = rtxt.SelectionStart;
r.Text = str;
}
else
{
str = rtxt.Text;
r.Text = rtxt.Text;
Index = rtxt.SelectionStart;
}
}
if (Index < str.Length - (FindString.Length - 1) && Index >= 0)
{
Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);
if (Index < 0 || Index > r.Text.Length)
{
seeks(FindString);
count = 0;
Index = 0;
MemoIndex = -1;
}
else
{
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
count++;
Index += FindString.Length;
if (Index > str.Length - FindString.Length)
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
else if (Index < rtxt.Text.Length && Index >= 0)
{
Index = rtxt.Find(FindString, Index, RichTextBoxFinds.MatchCase);
if (Index == -1)
{
if (r.Text != "")
{
Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);
if (Index < 0 || Index > r.Text.Length)
{
seeks(FindString);
count = 0;
Index = 0;
MemoIndex = -1;
}
else
{
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
Index += FindString.Length;
count++;
if (Index > str.Length - FindString.Length)
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
else
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
else
{
rtxt.Select(Index, FindString.Length);//在RichTextBox控件中搜索关键字
Index += FindString.Length;//递增标识查询关键字的初始长度
myColor(rtxt);//设定关键字为颜色
rtxt.Focus();
count++;
}
}
else
{
Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);
if (Index < r.Text.Length - FindString.Length && Index >= 0)
{
r.Select(Index, FindString.Length);
rtxt.Select(Index, FindString.Length);
myColor(rtxt);//设定关键字为颜色
Index += FindString.Length;//递增标识查询关键字的初始长度
rtxt.Focus();
count++;
}
else
{
seeks(FindString);
MemoIndex = -1;
Index = 0;
count = 0;
}
}
}
#endregion
替换 与 全部替换(功能不是很全)
#region =★*★*★= 〖替换〗与〖全部替换〗 =★*★*★=
#region =★*★*★= 单次替换字符串 =★*★*★=
/// <summary> 替换 </summary>
/// <param name="rtxt">RichTextBox</param>
/// <param name="FindString">查找字符串</param>
/// <param name="ReplString">替换字符串</param>
/// <param name="TrueFalse">(bool值)区分大小写<para> </para>真:区分<para></para>假:不区分</param>
public static void replaces(RichTextBox rtxt, string FindString, string ReplString, bool TrueFalse)
{
string txtSt = rtxt.SelectedText;
if (FindString.Equals(txtSt))
{
int fs = FindString.Length;
int rs = ReplString.Length;
int cs = fs - rs;
rtxt.SelectionLength = FindString.Length;
rtxt.SelectionColor = Color.Coral;
rtxt.SelectedText = ReplString;//textBox2中放要替换的字符
rtxt.Focus();
MemoIndex = -1;
rtxt.SelectionStart += cs;
}
FindDown(rtxt, FindString, TrueFalse);
}
#region =★*★*★= 替换字符串 =★*★*★=
/// <summary>替换字符串<para> </para>
/// 参数1(FindString):查找的内容<para></para>
/// 参数2(ReplString):要替换的内容 </summary>
/// <param name="FindString">查找的内容</param>
/// <param name="ReplString">要替换的内容</param>
private static void replace(RichTextBox rtxt, string FindString, string ReplString)
{
rtxt.SelectionLength = FindString.Length;
rtxt.SelectedText = ReplString;//textBox2中放要替换的字符
Index = rtxt.SelectionStart;//获取或设置光标选定位置
}
#endregion
#endregion
#region =★*★*★= 〖全部替换〗 =★*★*★=
/// <summary> 全部替换<para> </para>
/// 参数1(txt):RichTextBox 文本框<para></para>
/// 参数2(FindString):查找字符串<para></para>
/// 参数3(ReplString):替换字符串<para></para>
/// 参数4(trueFales):bool 真：区分大小写，假：不区分大小写</summary>
/// <param name="txt">RichTextBox 文本框</param>
/// <param name="FindString">查找字符串</param>
/// <param name="ReplString">替换字符串</param>
/// <param name="trueFales">bool 真：区分大小写，假：不区分大小写</param>
public static void ReplAll(RichTextBox rtxt, string FindString, string ReplString, bool trueFales)
{
if (trueFales)
onDistinCase(rtxt, FindString, ReplString);
else
offDistinCase(rtxt, FindString, ReplString);
}
#region =★*★*★= 全部替换(区分/不区分大小写) =★*★*★=
/// <summary> 全部替换(区分大小写) </summary>
/// <param name="rtxt">RichTextBox 文本框</param>
/// <param name="FindStr">查找字符串</param>
/// <param name="ReplStr">替换字符串</param>
private static void onDistinCase(RichTextBox rtxt, string FindStr, string ReplStr)
{
while (Index >= 0 || Index <= rtxt.Text.Length)
{
int cot = FindStr.Length - ReplStr.Length;
Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.MatchCase);
if (Index < 0 || Index > rtxt.Text.Length)
{
DialogResult r = MessageBox.Show(string.Format("查找结束，已经为您找到{0}个结果。", count),
"查找结果-Mxdr温馨提示!!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
if (r == DialogResult.Yes)
count = 0;
Index = 0;
break;
}
else
{
rtxt.Select(Index, FindStr.Length);
replace(rtxt, FindStr, ReplStr);
Index += FindStr.Length;
count++;
}
}
}
/// <summary> 全部替换(不区分大小写) </summary>
/// <param name="rtxt">RichTextBox 文本框</param>
/// <param name="FindStr">查找字符串</param>
/// <param name="ReplStr">替换字符串</param>
private static void offDistinCase(RichTextBox rtxt, string FindStr, string ReplStr)
{
while (Index >= 0 || Index <= rtxt.Text.Length)
{
int cot = FindStr.Length - ReplStr.Length;
Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.None);
if (Index < 0 || Index > rtxt.Text.Length)
{
DialogResult r = MessageBox.Show(string.Format("查找结束，已经为您找到{0}个结果。", count),
"查找结果-Mxdr温馨提示!!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
if (r == DialogResult.Yes)
count = 0;
Index = 0;
break;
}
else
{
rtxt.Select(Index, FindStr.Length);
replace(rtxt, FindStr, ReplStr);
Index += FindStr.Length;
count++;
}
}
}
#endregion
#endregion
#endregion消息弹窗
#region =★*★*★= 消息提示,提示用户查找结果 =★*★*★=
/// <summary> 消息提示,提示用户查找结果<para> <para>
/// 参数1(str):用户指定要查找的字符串</para></para> </summary>
/// <param name="str">用户指定要查找的字符串</param>
public static void seeks(string str)
{
if (count != 0)
MessageBox.Show(string.Format("已查找完毕,共〖{0}〗个 \"{1}\"!", count, str), "查找结果-Mxdr温馨提示!!");
else MessageBox.Show(string.Format("没有查找到 \"{0}\"!", str), "查找 - Mxdr温馨提示!");
}
#endregion
查找字符着色
#region =★*★*★= 查找字符上色 =★*★*★=
/// <summary> 查找字符上色 </summary>
/// <param name="rtxt">RichTextBox</param>
private static void myColor(RichTextBox rtxt)
{
rtxt.SelectionColor = Color.Coral;
}
#endregion以上都为个人的理解，有不全的地方请各位能指点迷津。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程学习网。
沃梦达教程
本文标题为：C#实现记事本查找与替换功能
基础教程推荐
猜你喜欢
- winform把Office转成PDF文件 2023-06-14
- C# List实现行转列的通用方案 2022-11-02
- C#类和结构详解 2023-05-30
- ZooKeeper的安装及部署教程 2023-01-22
- 一个读写csv文件的C#类 2022-11-06
- C# 调用WebService的方法 2023-03-09
- unity实现动态排行榜 2023-04-27
- C# windows语音识别与朗读实例 2023-04-27
- linux – 如何在Debian Jessie中安装dotnet core sdk 2023-09-26
- C#控制台实现飞行棋小游戏 2023-04-22
