文档编辑功能,全选菜单this.richTextBox1.SelectAll();复制菜单this.richTextBox1.Copy();剪切菜单this.r

Document editing function, select menu this.richTextBox1.SelectAll(); copy menu this.richTextBox1.Copy(); cut menu this.richTextBox1.Cut(); paste menu this.richTextBox1.Paste();C# source code