private void 打开ToolStripMenuItem1_Click(object sender, EventArgs e) { this.openFileDialog1.FileName = Environment.CurrentDirectory; if (this.listBox1.Items.Count >= 2) { SaveListBox(); } this.openFileDialog1.ShowDialog(); string filename = this.openFileDialog1.FileName; filenames.Add(filename); FileStreamUtil filestream = new FileStreamUtil(); List <string> list = filestream.ReaderFile(filename); foreach (string str in list) { this.textBox1.Text += str; } this.listBox1.Items.Add(Path.GetFileName(filename)); }