c#richtextbox查找与替换
c#richtextbox查找与替换
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https://blog.csdn.net/weixin_40695088/article/details/89363270
实现时间，日期以及richtextbox的查找与替换功能
1、或许系统日期和时间，
向Form1窗口添加一个statusStrip控件（新建在Form1的底部），在statusStrip控件的item属性添加toolStripStatusLabel1和toolStripStatusLabel2，添加Timer控件，在Tick事件写下面的代码，增加下面的代码在Form1_Load中。
private void Form1_Load(object sender, EventArgs e)
{
this.timer1.Interval = 1000;
this.timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
this.toolStripStatusLabel1.Text = "系统当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss");
}实现子菜单中（ToolStripMenuItem）的时间和日期功能，编写ToolStripMenuItem_Click事件
private void 日期ToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("系统当日期为：" + DateTime.Now.ToString("yyyy-MM-dd "),"实时日期");
}
private void 时间ToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("系统当时间为：" + DateTime.Now.ToString(" hh:mm:ss"), "实时时间");
} 
2、查找和替换功能
实现richtextbox的查找替换功能需要自己写一个窗口，再关联到主窗口中。
Form2窗口的具体代码如下，详见注释！
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 MDI
{
public partial class Form2 : Form
{
//实现对form1的关联
Form1 mainfrom1;
public Form2(Form1 form1)
{
InitializeComponent();
mainfrom1 = form1;
}
private void Form2_Load(object sender, EventArgs e)
{
radioButton2.Checked = true;//默认开启向下查找功能
}
int start = 0; int sun = 0; int count = 0;
private void button1_Click(object sender, EventArgs e)
{
RichTextBox rbox = mainfrom1.RichTxtBox;
string str = this.textBox1.Text;
if (this.checkBox1.Checked)//是否开启区分大小写功能
{
this.FindDownM(rbox, str);//向下查找
}
else
{
if (this.radioButton2.Checked)
{
this.FindDown(rbox, str);
}
else
{
this.FindUp(rbox, str);//向上查找
}
}
}
//替换textBox1中的文本为textBox2中的文本
private void button2_Click(object sender, EventArgs e)
{
string str0 = this.textBox1.Text, str1 = this.textBox2.Text;
this.replace(str0, str1);
}
//全部替换
private void button3_Click(object sender, EventArgs e)
{
RichTextBox rbox =mainfrom1.RichTxtBox;
string str0 = this.textBox1.Text, str1 = this.textBox2.Text;
this.ReplaceAll(rbox, str0, str1);
}
private void button4_Click(object sender, EventArgs e)
{
this.Close();
}
//向上查找函数
private void FindUp(RichTextBox rbox, string str)
{
int rbox1 = rbox.SelectionStart;
int index = rbox.Find(str, 0, rbox1, RichTextBoxFinds.Reverse);
if (index > -1)
{
rbox.SelectionStart = index;
rbox.SelectionLength = str.Length;
sun++;
rbox.Focus();
}
else if (index < 0)
{
seeks(str);
sun = 0;
// rbox.SelectionStart = rbox.Text.Length;
}
}
private void FindDown(RichTextBox rbox, string str)
{
int rbox1 = rbox.Text.Length;
if (start < rbox1)
{
start = rbox.Find(str, start, RichTextBoxFinds.None);
int los = rbox.SelectionStart + str.Length;
if ((start < 0) || (start > rbox1))
{
if (count == 0)
{
this.seeks(str);
start = los;
sun = 0;
}
else
{
this.seeks(str);
start = los;
sun = 0;
}
}
else if (start == rbox1 || start < 0)
{
this.seeks(str);
start = los;
sun = 0;
}
else
{
sun++;
start = los;
rbox.Focus();
}
}
else if (start == rbox1 || start < 0)
{
int los = rbox.SelectionStart + str.Length;
this.seeks(str);
start = los;
sun = 0;
}
else
{
int los = rbox.SelectionStart + str.Length;
this.seeks(str);
start = los;
sun = 0;
}
}
private void FindDownM(RichTextBox rbox, string str)
{
int rbox1 = rbox.Text.Length;
if (start < rbox1)
{
start = rbox.Find(str, start, RichTextBoxFinds.MatchCase);
int los = rbox.SelectionStart + str.Length;
if ((start < 0) || (start > rbox1))
{
if (count == 0)
{
this.seeks(str);
start = los;
sun = 0;
}
else
{
this.seeks(str);
start = los;
sun = 0;
}
}
else if (start == rbox1 || start < 0)
{
this.seeks(str);
start = los;
sun = 0;
}
else
{
sun++;
start = los;
rbox.Focus();
}
}
else if (start == rbox1 || start < 0)
{
int los = rbox.SelectionStart + str.Length;
this.seeks(str);
start = los;
sun = 0;
}
else
{
int los = rbox.SelectionStart + str.Length;
this.seeks(str);
start = los;
sun = 0;
}
}
//查找完毕后的弹窗
private void seeks(string str)
{
if (sun != 0)
{
MessageBox.Show(string.Format("查找完毕，共[{0}]个\"{1}\"!", sun, str), "查找—温馨提示");
}
else
{
MessageBox.Show(String.Format("\"{0}\"!", str), "查找—温馨提示");
}
}
//替换全部的函数
private void ReplaceAll(RichTextBox rbox,string str0,string str1)
{
rbox.Text = rbox.Text.Replace(str0, str1);
}
private void replace(string str0,string str1)
{
RichTextBox rbox =mainfrom1.RichTxtBox;
rbox.SelectionLength = str0.Length;
rbox.SelectedText = str1;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
this.button1.Enabled = true;
}
}
}
参考博客：https://blog.csdn.net/ou832339/article/details/23781661
另外，需要在form1主窗口中添加
public RichTextBox RichTxtBox
{
get { return this.richTextBox1; }
set { this.richTextBox1 = value; }
}
//相应的查找子菜单
private void 查找ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2(this);
f2.Show();
}
//相应的替换子菜单
private void 替换ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2(this);
f2.Show();
}
代码源文件下载：https://download.csdn.net/my/uploads/1/1