public Form1(){InitializeComponent();}private void 剪切TToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.Cut();}private void 复制CToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.Copy();}private void 粘贴PToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.Paste();}private void 撤消UToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.Undo();}private void 重复RToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.Redo();}private void 全选AToolStripMenuItem_Click(object sender, EventArgs e){richTextBox1.SelectAll();}private void toolStripStatusLabel2_Click(object sender, EventArgs e){}private void 自动换行ToolStripMenuItem_Click(object sender, EventArgs e){if (richTextBox1.WordWrap){自动换行ToolStripMenuItem.Checked = false;richTextBox1.WordWrap = false;toolStripStatusLabel4.Text = "1";toolStripStatusLabel6.Text = richTextBox1.TextLength.ToString();}else{自动换行ToolStripMenuItem.Checked = true;richTextBox1.WordWrap = true;}}private void richTextBox1_TextChanged(object sender, EventArgs e){toolStripStatusLabel2.Text = richTextBox1.TextLength.ToString();//字符数
toolStripStatusLabel4.Text = richTextBox1.Lines.Length.ToString();//行号
           toolStripStatusLabel6.Text = (richTextBox1.SelectionStart - richTextBox1.GetFirstCharIndexOfCurrentLine()).ToString();//焦点所在列数
        }private void richTextBox1_Click(object sender, EventArgs e){toolStripStatusLabel6.Text = (richTextBox1.SelectionStart - richTextBox1.GetFirstCharIndexOfCurrentLine()).ToString();//焦点所在列数int index = richTextBox1.GetFirstCharIndexOfCurrentLine();//GetFirstCharIndexOfCurrentLine()当前行第一个字符的索引//GetLineFromCharIndex(index)指定位置的索引行号toolStripStatusLabel4.Text = (richTextBox1.GetLineFromCharIndex(index) + 1).ToString();//焦点所在行号}