StreamReader srStream = null;
            if (File.Exists(stFilePath))
            {
                srStream = new StreamReader(stFilePath, System.Text.Encoding.UTF8);
                listView1.Items.Clear();
                //遍历txt文件里的所有行,并以ListView显示
                while (!srStream.EndOfStream)
                {
                    string _stLineValue = srStream.ReadLine();
                    ListViewItem _item = new ListViewItem();
                    _item.SubItems[0].Text = _stLineValue.Substring(0, _stLineValue.IndexOf("<----->"));
                    _stLineValue = _stLineValue.Substring(_stLineValue.IndexOf("<----->"));
                    _stLineValue = _stLineValue.Substring(7, (_stLineValue.Length - 7));
                    _item.SubItems.Add(_stLineValue.Substring(0, _stLineValue.IndexOf("<----->")));
                    _stLineValue = _stLineValue.Substring(_stLineValue.IndexOf("<----->"));
                    _stLineValue = _stLineValue.Substring(7, (_stLineValue.Length - 7));
                    _item.SubItems.Add(_stLineValue.Substring(0, _stLineValue.IndexOf("<----->")));
                    _stLineValue = _stLineValue.Substring(_stLineValue.IndexOf("<----->"));
                    _stLineValue = _stLineValue.Substring(7, (_stLineValue.Length - 7));
                    _item.SubItems.Add(_stLineValue.Substring(0, _stLineValue.IndexOf("<----->")));

                    if (_item.SubItems[3].Text.Equals("失败"))
                    {
                        _item.BackColor = Color.Red;
                    }
                    else
                    {
                        _item.BackColor = Color.Green;
                    }

                    listView1.Items.Add(_item);
                }

你都没有定义相关的变量呀

问题描述不太清楚,文本数据是什么样的,listview又有几列?