我要评论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：
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移动技术网。
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